./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/unroll-cond-2.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/unroll-cond-2.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 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:57:33,921 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:57:34,009 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:57:34,014 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:57:34,015 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:57:34,041 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:57:34,043 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:57:34,043 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:57:34,044 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:57:34,045 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:57:34,046 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:57:34,046 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:57:34,047 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:57:34,048 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:57:34,049 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:57:34,049 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:57:34,049 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:57:34,050 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:57:34,050 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:57:34,050 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:57:34,050 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:57:34,054 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:57:34,054 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:57:34,054 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:57:34,055 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:57:34,055 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:57:34,055 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:57:34,055 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:57:34,056 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:57:34,056 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:57:34,056 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:57:34,056 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:57:34,056 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:57:34,057 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:57:34,057 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:57:34,057 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:57:34,057 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:57:34,058 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:57:34,058 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:57:34,058 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:57:34,058 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:57:34,059 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:57:34,059 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 4f5c6e2b4939ff0e3b5a44ab7f8c3e5d18f7e9fd12beb8fad487ea501e8fa48b [2024-11-09 10:57:34,291 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:57:34,314 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:57:34,318 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:57:34,319 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:57:34,320 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:57:34,321 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2024-11-09 10:57:35,717 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:57:35,899 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:57:35,899 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-cond-2.wvr.c [2024-11-09 10:57:35,907 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f77884c1/702dac4dfaab4af7a1469fc807e67171/FLAGdf78b5e17 [2024-11-09 10:57:35,919 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/7f77884c1/702dac4dfaab4af7a1469fc807e67171 [2024-11-09 10:57:35,922 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:57:35,923 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:57:35,924 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:57:35,924 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:57:35,933 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:57:35,934 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:57:35" (1/1) ... [2024-11-09 10:57:35,935 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1a1e7129 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:35, skipping insertion in model container [2024-11-09 10:57:35,935 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:57:35" (1/1) ... [2024-11-09 10:57:35,963 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:57:36,211 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 10:57:36,215 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:57:36,225 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:57:36,257 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:57:36,280 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:57:36,280 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:36 WrapperNode [2024-11-09 10:57:36,280 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:57:36,282 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:57:36,282 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:57:36,283 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:57:36,291 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:36" (1/1) ... [2024-11-09 10:57:36,305 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:36" (1/1) ... [2024-11-09 10:57:36,332 INFO L138 Inliner]: procedures = 23, calls = 24, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 136 [2024-11-09 10:57:36,333 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:57:36,333 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:57:36,334 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:57:36,334 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:57:36,347 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:36" (1/1) ... [2024-11-09 10:57:36,347 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:36" (1/1) ... [2024-11-09 10:57:36,352 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:36" (1/1) ... [2024-11-09 10:57:36,379 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-09 10:57:36,379 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:36" (1/1) ... [2024-11-09 10:57:36,379 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:36" (1/1) ... [2024-11-09 10:57:36,386 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:36" (1/1) ... [2024-11-09 10:57:36,390 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:36" (1/1) ... [2024-11-09 10:57:36,392 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:36" (1/1) ... [2024-11-09 10:57:36,393 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:36" (1/1) ... [2024-11-09 10:57:36,395 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:57:36,398 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:57:36,398 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:57:36,398 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:57:36,399 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:36" (1/1) ... [2024-11-09 10:57:36,409 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:57:36,418 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:36,432 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 10:57:36,434 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 10:57:36,477 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:57:36,478 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:57:36,478 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:57:36,478 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:57:36,478 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:57:36,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:57:36,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:57:36,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:57:36,479 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:57:36,479 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:57:36,479 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:57:36,480 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:57:36,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:57:36,480 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:57:36,482 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 10:57:36,579 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:57:36,581 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:57:36,872 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:57:36,872 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:57:37,112 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:57:37,112 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-09 10:57:37,113 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:57:37 BoogieIcfgContainer [2024-11-09 10:57:37,113 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:57:37,115 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:57:37,115 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:57:37,120 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:57:37,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:57:35" (1/3) ... [2024-11-09 10:57:37,121 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b450b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:57:37, skipping insertion in model container [2024-11-09 10:57:37,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:57:36" (2/3) ... [2024-11-09 10:57:37,122 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@48b450b6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:57:37, skipping insertion in model container [2024-11-09 10:57:37,122 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:57:37" (3/3) ... [2024-11-09 10:57:37,123 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-cond-2.wvr.c [2024-11-09 10:57:37,140 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:57:37,140 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-11-09 10:57:37,140 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:57:37,201 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-09 10:57:37,240 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 43 places, 40 transitions, 94 flow [2024-11-09 10:57:37,272 INFO L124 PetriNetUnfolderBase]: 4/38 cut-off events. [2024-11-09 10:57:37,272 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-09 10:57:37,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 4/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 76 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-11-09 10:57:37,277 INFO L82 GeneralOperation]: Start removeDead. Operand has 43 places, 40 transitions, 94 flow [2024-11-09 10:57:37,280 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 40 places, 37 transitions, 86 flow [2024-11-09 10:57:37,287 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:57:37,293 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;@4407deb8, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:57:37,293 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-11-09 10:57:37,296 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:57:37,296 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:57:37,297 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:57:37,297 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:37,297 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:57:37,298 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:37,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:37,303 INFO L85 PathProgramCache]: Analyzing trace with hash 466718, now seen corresponding path program 1 times [2024-11-09 10:57:37,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:37,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1339324593] [2024-11-09 10:57:37,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:37,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:37,411 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:37,560 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 10:57:37,561 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:37,561 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1339324593] [2024-11-09 10:57:37,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1339324593] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:37,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:37,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:57:37,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373993678] [2024-11-09 10:57:37,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:37,572 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:57:37,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:37,597 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:57:37,597 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:57:37,618 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-09 10:57:37,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:37,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:37,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-09 10:57:37,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:37,755 INFO L124 PetriNetUnfolderBase]: 110/249 cut-off events. [2024-11-09 10:57:37,756 INFO L125 PetriNetUnfolderBase]: For 22/22 co-relation queries the response was YES. [2024-11-09 10:57:37,758 INFO L83 FinitePrefix]: Finished finitePrefix Result has 458 conditions, 249 events. 110/249 cut-off events. For 22/22 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1075 event pairs, 75 based on Foata normal form. 1/198 useless extension candidates. Maximal degree in co-relation 396. Up to 185 conditions per place. [2024-11-09 10:57:37,762 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 21 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-09 10:57:37,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 34 transitions, 126 flow [2024-11-09 10:57:37,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:57:37,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:57:37,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 67 transitions. [2024-11-09 10:57:37,794 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5583333333333333 [2024-11-09 10:57:37,796 INFO L175 Difference]: Start difference. First operand has 40 places, 37 transitions, 86 flow. Second operand 3 states and 67 transitions. [2024-11-09 10:57:37,797 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 34 transitions, 126 flow [2024-11-09 10:57:37,800 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 34 transitions, 118 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:57:37,802 INFO L231 Difference]: Finished difference. Result has 35 places, 34 transitions, 76 flow [2024-11-09 10:57:37,804 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=35, PETRI_TRANSITIONS=34} [2024-11-09 10:57:37,815 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -5 predicate places. [2024-11-09 10:57:37,819 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 34 transitions, 76 flow [2024-11-09 10:57:37,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.0) internal successors, (45), 3 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:37,820 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:37,820 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:57:37,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:57:37,820 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:37,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:37,821 INFO L85 PathProgramCache]: Analyzing trace with hash 466719, now seen corresponding path program 1 times [2024-11-09 10:57:37,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:37,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [976860715] [2024-11-09 10:57:37,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:37,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:37,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:38,192 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 10:57:38,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:38,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [976860715] [2024-11-09 10:57:38,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [976860715] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:38,193 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:38,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:57:38,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484337563] [2024-11-09 10:57:38,193 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:38,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:57:38,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:38,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:57:38,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:57:38,223 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-09 10:57:38,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 34 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 10:57:38,224 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:38,224 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-09 10:57:38,224 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:38,351 INFO L124 PetriNetUnfolderBase]: 111/252 cut-off events. [2024-11-09 10:57:38,352 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-09 10:57:38,353 INFO L83 FinitePrefix]: Finished finitePrefix Result has 454 conditions, 252 events. 111/252 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1089 event pairs, 75 based on Foata normal form. 0/200 useless extension candidates. Maximal degree in co-relation 432. Up to 190 conditions per place. [2024-11-09 10:57:38,355 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 24 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-11-09 10:57:38,355 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 37 transitions, 138 flow [2024-11-09 10:57:38,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:57:38,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:57:38,357 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 70 transitions. [2024-11-09 10:57:38,357 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-09 10:57:38,357 INFO L175 Difference]: Start difference. First operand has 35 places, 34 transitions, 76 flow. Second operand 3 states and 70 transitions. [2024-11-09 10:57:38,357 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 37 transitions, 138 flow [2024-11-09 10:57:38,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 37 transitions, 132 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:57:38,360 INFO L231 Difference]: Finished difference. Result has 36 places, 36 transitions, 91 flow [2024-11-09 10:57:38,360 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=36, PETRI_TRANSITIONS=36} [2024-11-09 10:57:38,360 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2024-11-09 10:57:38,361 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 36 transitions, 91 flow [2024-11-09 10:57:38,361 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.75) internal successors, (59), 4 states have internal predecessors, (59), 0 states have call successors, (0), 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 10:57:38,361 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:38,361 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:57:38,361 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:57:38,362 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:38,362 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:38,362 INFO L85 PathProgramCache]: Analyzing trace with hash 448532008, now seen corresponding path program 1 times [2024-11-09 10:57:38,362 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:38,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [58955789] [2024-11-09 10:57:38,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:38,363 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:38,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:38,668 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 10:57:38,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:38,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [58955789] [2024-11-09 10:57:38,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [58955789] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:38,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1444062815] [2024-11-09 10:57:38,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:38,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:38,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:38,672 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 10:57:38,674 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 10:57:38,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:38,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 10:57:38,746 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:38,809 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 10:57:39,060 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 10:57:39,060 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:39,167 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 10:57:39,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1444062815] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:39,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:39,168 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:57:39,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503096169] [2024-11-09 10:57:39,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:39,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:57:39,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:39,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:57:39,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:57:39,320 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-09 10:57:39,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 36 transitions, 91 flow. Second operand has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 0 states have call successors, (0), 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 10:57:39,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:39,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-09 10:57:39,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:39,613 INFO L124 PetriNetUnfolderBase]: 112/254 cut-off events. [2024-11-09 10:57:39,613 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-09 10:57:39,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 465 conditions, 254 events. 112/254 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 38. Compared 1094 event pairs, 75 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 432. Up to 187 conditions per place. [2024-11-09 10:57:39,616 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 20 selfloop transitions, 9 changer transitions 0/39 dead transitions. [2024-11-09 10:57:39,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 39 transitions, 157 flow [2024-11-09 10:57:39,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:57:39,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:57:39,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2024-11-09 10:57:39,618 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4607142857142857 [2024-11-09 10:57:39,619 INFO L175 Difference]: Start difference. First operand has 36 places, 36 transitions, 91 flow. Second operand 7 states and 129 transitions. [2024-11-09 10:57:39,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 39 transitions, 157 flow [2024-11-09 10:57:39,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 39 transitions, 154 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:57:39,620 INFO L231 Difference]: Finished difference. Result has 40 places, 39 transitions, 116 flow [2024-11-09 10:57:39,621 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=116, PETRI_PLACES=40, PETRI_TRANSITIONS=39} [2024-11-09 10:57:39,621 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 0 predicate places. [2024-11-09 10:57:39,622 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 39 transitions, 116 flow [2024-11-09 10:57:39,622 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.363636363636363) internal successors, (169), 11 states have internal predecessors, (169), 0 states have call successors, (0), 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 10:57:39,622 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:39,622 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:57:39,640 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 10:57:39,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:39,827 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:39,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:39,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1021976845, now seen corresponding path program 1 times [2024-11-09 10:57:39,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:39,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554361875] [2024-11-09 10:57:39,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:39,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:39,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:39,894 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 10:57:39,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:39,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554361875] [2024-11-09 10:57:39,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554361875] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:39,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:39,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:57:39,896 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336678322] [2024-11-09 10:57:39,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:39,897 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:57:39,897 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:39,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:57:39,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:57:39,923 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-11-09 10:57:39,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 39 transitions, 116 flow. Second operand has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 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 10:57:39,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:39,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-11-09 10:57:39,924 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:39,990 INFO L124 PetriNetUnfolderBase]: 112/228 cut-off events. [2024-11-09 10:57:39,990 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-09 10:57:39,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 447 conditions, 228 events. 112/228 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 840 event pairs, 75 based on Foata normal form. 0/203 useless extension candidates. Maximal degree in co-relation 406. Up to 186 conditions per place. [2024-11-09 10:57:39,993 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 25 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2024-11-09 10:57:39,993 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 35 transitions, 166 flow [2024-11-09 10:57:39,996 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:57:39,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:57:39,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-11-09 10:57:39,997 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-11-09 10:57:39,997 INFO L175 Difference]: Start difference. First operand has 40 places, 39 transitions, 116 flow. Second operand 4 states and 67 transitions. [2024-11-09 10:57:39,997 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 35 transitions, 166 flow [2024-11-09 10:57:39,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 35 transitions, 148 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-09 10:57:39,999 INFO L231 Difference]: Finished difference. Result has 36 places, 35 transitions, 98 flow [2024-11-09 10:57:40,000 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=90, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=98, PETRI_PLACES=36, PETRI_TRANSITIONS=35} [2024-11-09 10:57:40,000 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2024-11-09 10:57:40,001 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 35 transitions, 98 flow [2024-11-09 10:57:40,001 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.5) internal successors, (46), 4 states have internal predecessors, (46), 0 states have call successors, (0), 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 10:57:40,001 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:40,001 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-09 10:57:40,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:57:40,002 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:40,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:40,002 INFO L85 PathProgramCache]: Analyzing trace with hash 1021976846, now seen corresponding path program 1 times [2024-11-09 10:57:40,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:40,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044627905] [2024-11-09 10:57:40,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:40,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:40,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:40,064 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 10:57:40,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:40,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044627905] [2024-11-09 10:57:40,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1044627905] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:40,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:40,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:57:40,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137482316] [2024-11-09 10:57:40,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:40,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:57:40,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:40,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:57:40,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:57:40,071 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-09 10:57:40,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 35 transitions, 98 flow. Second operand has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 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 10:57:40,071 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:40,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-09 10:57:40,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:40,158 INFO L124 PetriNetUnfolderBase]: 111/227 cut-off events. [2024-11-09 10:57:40,158 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-11-09 10:57:40,159 INFO L83 FinitePrefix]: Finished finitePrefix Result has 437 conditions, 227 events. 111/227 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 829 event pairs, 75 based on Foata normal form. 1/203 useless extension candidates. Maximal degree in co-relation 406. Up to 191 conditions per place. [2024-11-09 10:57:40,161 INFO L140 encePairwiseOnDemand]: 37/40 looper letters, 26 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-11-09 10:57:40,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 34 transitions, 149 flow [2024-11-09 10:57:40,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:57:40,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:57:40,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2024-11-09 10:57:40,162 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5916666666666667 [2024-11-09 10:57:40,163 INFO L175 Difference]: Start difference. First operand has 36 places, 35 transitions, 98 flow. Second operand 3 states and 71 transitions. [2024-11-09 10:57:40,163 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 34 transitions, 149 flow [2024-11-09 10:57:40,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 145 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:57:40,164 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 93 flow [2024-11-09 10:57:40,164 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=93, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2024-11-09 10:57:40,165 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -4 predicate places. [2024-11-09 10:57:40,168 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 93 flow [2024-11-09 10:57:40,170 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.666666666666668) internal successors, (50), 3 states have internal predecessors, (50), 0 states have call successors, (0), 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 10:57:40,170 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:40,170 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:40,171 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:57:40,172 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:40,173 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:40,173 INFO L85 PathProgramCache]: Analyzing trace with hash 576645477, now seen corresponding path program 1 times [2024-11-09 10:57:40,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:40,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1698478720] [2024-11-09 10:57:40,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:40,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:40,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:40,367 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:40,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1698478720] [2024-11-09 10:57:40,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1698478720] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:40,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420566351] [2024-11-09 10:57:40,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:40,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:40,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:40,371 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 10:57:40,373 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 10:57:40,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:40,441 INFO L255 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:57:40,442 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:40,537 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:40,537 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:40,600 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 29 treesize of output 25 [2024-11-09 10:57:40,627 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:40,628 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420566351] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:40,628 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:40,628 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:57:40,628 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791085375] [2024-11-09 10:57:40,628 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:40,629 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:57:40,629 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:40,629 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:57:40,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:57:40,766 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-09 10:57:40,767 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 93 flow. Second operand has 11 states, 11 states have (on average 16.181818181818183) internal successors, (178), 11 states have internal predecessors, (178), 0 states have call successors, (0), 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 10:57:40,767 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:40,767 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-09 10:57:40,767 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:40,931 INFO L124 PetriNetUnfolderBase]: 232/429 cut-off events. [2024-11-09 10:57:40,932 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-11-09 10:57:40,933 INFO L83 FinitePrefix]: Finished finitePrefix Result has 847 conditions, 429 events. 232/429 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 1812 event pairs, 82 based on Foata normal form. 0/357 useless extension candidates. Maximal degree in co-relation 833. Up to 220 conditions per place. [2024-11-09 10:57:40,935 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 41 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2024-11-09 10:57:40,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 51 transitions, 222 flow [2024-11-09 10:57:40,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:57:40,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:57:40,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 114 transitions. [2024-11-09 10:57:40,937 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.57 [2024-11-09 10:57:40,937 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 93 flow. Second operand 5 states and 114 transitions. [2024-11-09 10:57:40,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 51 transitions, 222 flow [2024-11-09 10:57:40,938 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 51 transitions, 218 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:57:40,939 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 108 flow [2024-11-09 10:57:40,939 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=108, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-11-09 10:57:40,940 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, -1 predicate places. [2024-11-09 10:57:40,940 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 108 flow [2024-11-09 10:57:40,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.181818181818183) internal successors, (178), 11 states have internal predecessors, (178), 0 states have call successors, (0), 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 10:57:40,940 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:40,941 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:40,958 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 10:57:41,144 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,SelfDestructingSolverStorable5 [2024-11-09 10:57:41,145 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:41,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:41,145 INFO L85 PathProgramCache]: Analyzing trace with hash 105537385, now seen corresponding path program 1 times [2024-11-09 10:57:41,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:41,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907461976] [2024-11-09 10:57:41,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:41,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:41,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:41,329 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 10:57:41,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:41,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907461976] [2024-11-09 10:57:41,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907461976] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:41,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1366275992] [2024-11-09 10:57:41,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:41,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:41,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:41,332 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 10:57:41,334 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 10:57:41,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:41,402 INFO L255 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 10:57:41,403 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:41,536 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 10:57:41,536 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:41,612 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 36 treesize of output 32 [2024-11-09 10:57:41,795 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 10:57:41,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1366275992] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:41,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:41,796 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-09 10:57:41,796 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161297373] [2024-11-09 10:57:41,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:41,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 10:57:41,797 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:41,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 10:57:41,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-09 10:57:42,116 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-09 10:57:42,117 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 108 flow. Second operand has 17 states, 17 states have (on average 15.764705882352942) internal successors, (268), 17 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:42,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:42,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-09 10:57:42,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:42,616 INFO L124 PetriNetUnfolderBase]: 508/980 cut-off events. [2024-11-09 10:57:42,616 INFO L125 PetriNetUnfolderBase]: For 80/80 co-relation queries the response was YES. [2024-11-09 10:57:42,618 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2002 conditions, 980 events. 508/980 cut-off events. For 80/80 co-relation queries the response was YES. Maximal size of possible extension queue 87. Compared 5256 event pairs, 236 based on Foata normal form. 0/843 useless extension candidates. Maximal degree in co-relation 1096. Up to 372 conditions per place. [2024-11-09 10:57:42,624 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 71 selfloop transitions, 12 changer transitions 0/88 dead transitions. [2024-11-09 10:57:42,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 88 transitions, 398 flow [2024-11-09 10:57:42,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:57:42,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:57:42,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-11-09 10:57:42,626 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.60625 [2024-11-09 10:57:42,626 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 108 flow. Second operand 8 states and 194 transitions. [2024-11-09 10:57:42,626 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 88 transitions, 398 flow [2024-11-09 10:57:42,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 88 transitions, 389 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:57:42,629 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 168 flow [2024-11-09 10:57:42,629 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=36, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=168, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2024-11-09 10:57:42,630 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 6 predicate places. [2024-11-09 10:57:42,630 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 168 flow [2024-11-09 10:57:42,633 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.764705882352942) internal successors, (268), 17 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:42,633 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:42,634 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:42,651 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 10:57:42,834 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:42,835 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:42,835 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:42,835 INFO L85 PathProgramCache]: Analyzing trace with hash 84923166, now seen corresponding path program 1 times [2024-11-09 10:57:42,835 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:42,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [316461023] [2024-11-09 10:57:42,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:42,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:42,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:42,980 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:42,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:42,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [316461023] [2024-11-09 10:57:42,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [316461023] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:42,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378388493] [2024-11-09 10:57:42,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:42,985 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:42,985 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:42,989 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 10:57:42,990 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 10:57:43,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:43,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:57:43,052 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:43,136 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:43,137 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:43,198 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 29 treesize of output 25 [2024-11-09 10:57:43,221 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:43,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378388493] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:43,222 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:43,222 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:57:43,222 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66751628] [2024-11-09 10:57:43,222 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:43,222 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:57:43,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:43,223 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:57:43,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:57:43,327 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-09 10:57:43,328 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 168 flow. Second operand has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 0 states have call successors, (0), 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 10:57:43,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:43,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-09 10:57:43,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:43,551 INFO L124 PetriNetUnfolderBase]: 831/1437 cut-off events. [2024-11-09 10:57:43,551 INFO L125 PetriNetUnfolderBase]: For 830/890 co-relation queries the response was YES. [2024-11-09 10:57:43,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3520 conditions, 1437 events. 831/1437 cut-off events. For 830/890 co-relation queries the response was YES. Maximal size of possible extension queue 93. Compared 7126 event pairs, 246 based on Foata normal form. 64/1403 useless extension candidates. Maximal degree in co-relation 2294. Up to 853 conditions per place. [2024-11-09 10:57:43,560 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 47 selfloop transitions, 8 changer transitions 0/58 dead transitions. [2024-11-09 10:57:43,560 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 58 transitions, 338 flow [2024-11-09 10:57:43,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:57:43,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:57:43,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 104 transitions. [2024-11-09 10:57:43,561 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.52 [2024-11-09 10:57:43,562 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 168 flow. Second operand 5 states and 104 transitions. [2024-11-09 10:57:43,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 58 transitions, 338 flow [2024-11-09 10:57:43,564 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 58 transitions, 331 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:57:43,565 INFO L231 Difference]: Finished difference. Result has 48 places, 43 transitions, 199 flow [2024-11-09 10:57:43,565 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=199, PETRI_PLACES=48, PETRI_TRANSITIONS=43} [2024-11-09 10:57:43,566 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 8 predicate places. [2024-11-09 10:57:43,566 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 43 transitions, 199 flow [2024-11-09 10:57:43,566 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 0 states have call successors, (0), 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 10:57:43,566 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:43,567 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:43,587 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 10:57:43,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:43,771 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:43,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:43,771 INFO L85 PathProgramCache]: Analyzing trace with hash -1662348661, now seen corresponding path program 1 times [2024-11-09 10:57:43,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:43,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314370634] [2024-11-09 10:57:43,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:43,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:43,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:43,929 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:43,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:43,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314370634] [2024-11-09 10:57:43,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314370634] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:43,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192835151] [2024-11-09 10:57:43,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:43,930 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:43,930 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:43,932 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 10:57:43,933 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 10:57:43,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:43,998 INFO L255 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 10:57:43,999 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:44,134 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:44,135 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:44,174 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 29 treesize of output 25 [2024-11-09 10:57:44,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:57:44,386 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [192835151] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:44,387 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:44,387 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-09 10:57:44,387 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373944453] [2024-11-09 10:57:44,387 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:44,388 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:57:44,388 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:44,388 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:57:44,389 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:57:44,524 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-09 10:57:44,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 43 transitions, 199 flow. Second operand has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 0 states have call successors, (0), 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 10:57:44,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:44,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-09 10:57:44,525 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:44,790 INFO L124 PetriNetUnfolderBase]: 853/1466 cut-off events. [2024-11-09 10:57:44,791 INFO L125 PetriNetUnfolderBase]: For 982/1069 co-relation queries the response was YES. [2024-11-09 10:57:44,794 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3847 conditions, 1466 events. 853/1466 cut-off events. For 982/1069 co-relation queries the response was YES. Maximal size of possible extension queue 90. Compared 7278 event pairs, 426 based on Foata normal form. 0/1370 useless extension candidates. Maximal degree in co-relation 2484. Up to 1107 conditions per place. [2024-11-09 10:57:44,800 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 64 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2024-11-09 10:57:44,800 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 78 transitions, 456 flow [2024-11-09 10:57:44,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:57:44,801 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:57:44,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-11-09 10:57:44,802 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2024-11-09 10:57:44,802 INFO L175 Difference]: Start difference. First operand has 48 places, 43 transitions, 199 flow. Second operand 7 states and 152 transitions. [2024-11-09 10:57:44,802 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 78 transitions, 456 flow [2024-11-09 10:57:44,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 78 transitions, 440 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-09 10:57:44,806 INFO L231 Difference]: Finished difference. Result has 52 places, 45 transitions, 225 flow [2024-11-09 10:57:44,806 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=225, PETRI_PLACES=52, PETRI_TRANSITIONS=45} [2024-11-09 10:57:44,807 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 12 predicate places. [2024-11-09 10:57:44,807 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 45 transitions, 225 flow [2024-11-09 10:57:44,807 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 0 states have call successors, (0), 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 10:57:44,807 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:44,807 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:44,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-09 10:57:45,008 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:45,008 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:45,009 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:45,009 INFO L85 PathProgramCache]: Analyzing trace with hash 417670208, now seen corresponding path program 2 times [2024-11-09 10:57:45,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:45,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663717647] [2024-11-09 10:57:45,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:45,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:45,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:45,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:57:45,206 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:45,206 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663717647] [2024-11-09 10:57:45,206 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663717647] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:45,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359766312] [2024-11-09 10:57:45,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:57:45,207 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:45,207 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:45,209 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 10:57:45,210 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 10:57:45,271 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:57:45,271 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:45,272 INFO L255 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-09 10:57:45,274 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:45,289 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 8 treesize of output 1 [2024-11-09 10:57:45,452 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:57:45,452 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:45,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:57:45,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [359766312] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:45,612 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:45,612 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-09 10:57:45,614 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358267907] [2024-11-09 10:57:45,614 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:45,615 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:57:45,615 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:45,615 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:57:45,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-09 10:57:45,866 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-09 10:57:45,866 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 45 transitions, 225 flow. Second operand has 12 states, 12 states have (on average 16.583333333333332) internal successors, (199), 12 states have internal predecessors, (199), 0 states have call successors, (0), 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 10:57:45,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:45,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-09 10:57:45,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:46,168 INFO L124 PetriNetUnfolderBase]: 708/1292 cut-off events. [2024-11-09 10:57:46,169 INFO L125 PetriNetUnfolderBase]: For 713/713 co-relation queries the response was YES. [2024-11-09 10:57:46,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3354 conditions, 1292 events. 708/1292 cut-off events. For 713/713 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 6945 event pairs, 383 based on Foata normal form. 0/1228 useless extension candidates. Maximal degree in co-relation 2224. Up to 867 conditions per place. [2024-11-09 10:57:46,177 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 46 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2024-11-09 10:57:46,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 61 transitions, 409 flow [2024-11-09 10:57:46,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:57:46,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:57:46,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-11-09 10:57:46,179 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.525 [2024-11-09 10:57:46,179 INFO L175 Difference]: Start difference. First operand has 52 places, 45 transitions, 225 flow. Second operand 5 states and 105 transitions. [2024-11-09 10:57:46,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 61 transitions, 409 flow [2024-11-09 10:57:46,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 61 transitions, 386 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-09 10:57:46,184 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 221 flow [2024-11-09 10:57:46,184 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2024-11-09 10:57:46,186 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 10 predicate places. [2024-11-09 10:57:46,186 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 221 flow [2024-11-09 10:57:46,186 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 16.583333333333332) internal successors, (199), 12 states have internal predecessors, (199), 0 states have call successors, (0), 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 10:57:46,186 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:46,187 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:46,206 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 10:57:46,387 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:46,388 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:46,388 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:46,388 INFO L85 PathProgramCache]: Analyzing trace with hash -576165740, now seen corresponding path program 2 times [2024-11-09 10:57:46,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:46,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196000257] [2024-11-09 10:57:46,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:46,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:46,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:46,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:57:46,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:46,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196000257] [2024-11-09 10:57:46,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196000257] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:46,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116944474] [2024-11-09 10:57:46,611 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:57:46,611 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:46,611 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:46,613 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 10:57:46,615 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 10:57:46,689 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:57:46,690 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:46,691 INFO L255 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-09 10:57:46,693 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:46,700 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 10:57:46,934 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:57:46,935 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:57:46,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116944474] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:46,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:57:46,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2024-11-09 10:57:46,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908631738] [2024-11-09 10:57:46,935 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:46,936 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:57:46,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:46,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:57:46,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-11-09 10:57:47,001 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-09 10:57:47,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 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 10:57:47,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:47,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-09 10:57:47,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:47,296 INFO L124 PetriNetUnfolderBase]: 877/1503 cut-off events. [2024-11-09 10:57:47,296 INFO L125 PetriNetUnfolderBase]: For 1793/1793 co-relation queries the response was YES. [2024-11-09 10:57:47,299 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4233 conditions, 1503 events. 877/1503 cut-off events. For 1793/1793 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 7427 event pairs, 162 based on Foata normal form. 0/1341 useless extension candidates. Maximal degree in co-relation 2716. Up to 853 conditions per place. [2024-11-09 10:57:47,305 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 59 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2024-11-09 10:57:47,305 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 71 transitions, 496 flow [2024-11-09 10:57:47,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:57:47,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:57:47,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-11-09 10:57:47,306 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-11-09 10:57:47,306 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 221 flow. Second operand 5 states and 108 transitions. [2024-11-09 10:57:47,306 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 71 transitions, 496 flow [2024-11-09 10:57:47,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 71 transitions, 452 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:57:47,309 INFO L231 Difference]: Finished difference. Result has 52 places, 47 transitions, 248 flow [2024-11-09 10:57:47,309 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=201, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=248, PETRI_PLACES=52, PETRI_TRANSITIONS=47} [2024-11-09 10:57:47,310 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 12 predicate places. [2024-11-09 10:57:47,310 INFO L471 AbstractCegarLoop]: Abstraction has has 52 places, 47 transitions, 248 flow [2024-11-09 10:57:47,310 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 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 10:57:47,310 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:47,311 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:47,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 10:57:47,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:47,515 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:47,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:47,515 INFO L85 PathProgramCache]: Analyzing trace with hash 210786255, now seen corresponding path program 1 times [2024-11-09 10:57:47,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:47,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [364964671] [2024-11-09 10:57:47,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:47,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:47,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:47,688 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 10:57:47,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:47,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [364964671] [2024-11-09 10:57:47,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [364964671] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:47,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1859413621] [2024-11-09 10:57:47,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:47,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:47,690 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:47,693 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:47,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:57:47,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:47,761 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 10:57:47,762 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:47,895 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 10:57:47,896 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:47,966 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 36 treesize of output 32 [2024-11-09 10:57:48,154 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 10:57:48,155 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1859413621] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:48,155 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:48,155 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-09 10:57:48,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645172819] [2024-11-09 10:57:48,156 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:48,156 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 10:57:48,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:48,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 10:57:48,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-09 10:57:48,470 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-09 10:57:48,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 47 transitions, 248 flow. Second operand has 17 states, 17 states have (on average 14.294117647058824) internal successors, (243), 17 states have internal predecessors, (243), 0 states have call successors, (0), 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 10:57:48,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:48,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-09 10:57:48,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:48,913 INFO L124 PetriNetUnfolderBase]: 808/1386 cut-off events. [2024-11-09 10:57:48,914 INFO L125 PetriNetUnfolderBase]: For 1136/1136 co-relation queries the response was YES. [2024-11-09 10:57:48,916 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3979 conditions, 1386 events. 808/1386 cut-off events. For 1136/1136 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6697 event pairs, 438 based on Foata normal form. 0/1338 useless extension candidates. Maximal degree in co-relation 2790. Up to 720 conditions per place. [2024-11-09 10:57:48,922 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 77 selfloop transitions, 15 changer transitions 0/94 dead transitions. [2024-11-09 10:57:48,923 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 94 transitions, 589 flow [2024-11-09 10:57:48,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:57:48,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:57:48,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 178 transitions. [2024-11-09 10:57:48,924 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55625 [2024-11-09 10:57:48,924 INFO L175 Difference]: Start difference. First operand has 52 places, 47 transitions, 248 flow. Second operand 8 states and 178 transitions. [2024-11-09 10:57:48,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 94 transitions, 589 flow [2024-11-09 10:57:48,928 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 94 transitions, 580 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:57:48,929 INFO L231 Difference]: Finished difference. Result has 59 places, 51 transitions, 316 flow [2024-11-09 10:57:48,930 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=316, PETRI_PLACES=59, PETRI_TRANSITIONS=51} [2024-11-09 10:57:48,931 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 19 predicate places. [2024-11-09 10:57:48,932 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 51 transitions, 316 flow [2024-11-09 10:57:48,932 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.294117647058824) internal successors, (243), 17 states have internal predecessors, (243), 0 states have call successors, (0), 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 10:57:48,932 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:48,932 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:48,949 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-09 10:57:49,136 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-09 10:57:49,137 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:49,137 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:49,137 INFO L85 PathProgramCache]: Analyzing trace with hash 355520408, now seen corresponding path program 2 times [2024-11-09 10:57:49,137 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:49,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134009369] [2024-11-09 10:57:49,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:49,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:49,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:49,334 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:57:49,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:49,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134009369] [2024-11-09 10:57:49,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134009369] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:49,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289261250] [2024-11-09 10:57:49,335 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:57:49,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:49,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:49,337 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:49,339 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-09 10:57:49,412 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-09 10:57:49,412 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:49,413 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 10:57:49,415 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:49,423 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 10:57:49,627 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:57:49,628 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:49,792 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:57:49,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1289261250] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:49,793 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:49,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-11-09 10:57:49,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702666162] [2024-11-09 10:57:49,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:49,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-09 10:57:49,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:49,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-09 10:57:49,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-11-09 10:57:49,981 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-11-09 10:57:49,981 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 51 transitions, 316 flow. Second operand has 12 states, 12 states have (on average 15.333333333333334) internal successors, (184), 12 states have internal predecessors, (184), 0 states have call successors, (0), 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 10:57:49,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:49,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-11-09 10:57:49,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:50,289 INFO L124 PetriNetUnfolderBase]: 729/1259 cut-off events. [2024-11-09 10:57:50,289 INFO L125 PetriNetUnfolderBase]: For 1706/1706 co-relation queries the response was YES. [2024-11-09 10:57:50,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3848 conditions, 1259 events. 729/1259 cut-off events. For 1706/1706 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 6092 event pairs, 322 based on Foata normal form. 16/1273 useless extension candidates. Maximal degree in co-relation 2570. Up to 732 conditions per place. [2024-11-09 10:57:50,297 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 39 selfloop transitions, 18 changer transitions 0/59 dead transitions. [2024-11-09 10:57:50,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 470 flow [2024-11-09 10:57:50,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:57:50,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:57:50,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-11-09 10:57:50,300 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-11-09 10:57:50,300 INFO L175 Difference]: Start difference. First operand has 59 places, 51 transitions, 316 flow. Second operand 5 states and 92 transitions. [2024-11-09 10:57:50,300 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 470 flow [2024-11-09 10:57:50,306 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 59 transitions, 450 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-09 10:57:50,307 INFO L231 Difference]: Finished difference. Result has 55 places, 48 transitions, 313 flow [2024-11-09 10:57:50,307 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=313, PETRI_PLACES=55, PETRI_TRANSITIONS=48} [2024-11-09 10:57:50,308 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 15 predicate places. [2024-11-09 10:57:50,308 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 48 transitions, 313 flow [2024-11-09 10:57:50,308 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 15.333333333333334) internal successors, (184), 12 states have internal predecessors, (184), 0 states have call successors, (0), 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 10:57:50,309 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:50,309 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:50,325 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-09 10:57:50,512 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-09 10:57:50,513 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:50,513 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:50,513 INFO L85 PathProgramCache]: Analyzing trace with hash 1319414913, now seen corresponding path program 1 times [2024-11-09 10:57:50,514 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:50,514 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279715923] [2024-11-09 10:57:50,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:50,514 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:50,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:50,579 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 10:57:50,579 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:50,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279715923] [2024-11-09 10:57:50,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1279715923] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:50,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:50,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:57:50,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130667260] [2024-11-09 10:57:50,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:50,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:57:50,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:50,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:57:50,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:57:50,588 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-09 10:57:50,588 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 48 transitions, 313 flow. Second operand has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 10:57:50,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:50,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-09 10:57:50,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:50,717 INFO L124 PetriNetUnfolderBase]: 739/1259 cut-off events. [2024-11-09 10:57:50,717 INFO L125 PetriNetUnfolderBase]: For 2034/2034 co-relation queries the response was YES. [2024-11-09 10:57:50,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4067 conditions, 1259 events. 739/1259 cut-off events. For 2034/2034 co-relation queries the response was YES. Maximal size of possible extension queue 79. Compared 5984 event pairs, 208 based on Foata normal form. 2/1261 useless extension candidates. Maximal degree in co-relation 2742. Up to 943 conditions per place. [2024-11-09 10:57:50,725 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 54 selfloop transitions, 7 changer transitions 1/64 dead transitions. [2024-11-09 10:57:50,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 64 transitions, 504 flow [2024-11-09 10:57:50,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:57:50,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:57:50,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 85 transitions. [2024-11-09 10:57:50,726 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7083333333333334 [2024-11-09 10:57:50,727 INFO L175 Difference]: Start difference. First operand has 55 places, 48 transitions, 313 flow. Second operand 3 states and 85 transitions. [2024-11-09 10:57:50,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 64 transitions, 504 flow [2024-11-09 10:57:50,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 64 transitions, 462 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-09 10:57:50,734 INFO L231 Difference]: Finished difference. Result has 54 places, 51 transitions, 328 flow [2024-11-09 10:57:50,735 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=277, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=328, PETRI_PLACES=54, PETRI_TRANSITIONS=51} [2024-11-09 10:57:50,736 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 14 predicate places. [2024-11-09 10:57:50,736 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 51 transitions, 328 flow [2024-11-09 10:57:50,736 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.333333333333332) internal successors, (61), 3 states have internal predecessors, (61), 0 states have call successors, (0), 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 10:57:50,736 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:50,736 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:50,736 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-09 10:57:50,736 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:50,736 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:50,737 INFO L85 PathProgramCache]: Analyzing trace with hash -936127283, now seen corresponding path program 1 times [2024-11-09 10:57:50,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:50,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1749647907] [2024-11-09 10:57:50,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:50,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:50,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:50,821 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 10:57:50,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:50,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1749647907] [2024-11-09 10:57:50,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1749647907] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:50,822 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:50,822 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 10:57:50,823 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1252020540] [2024-11-09 10:57:50,823 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:50,823 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:57:50,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:50,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:57:50,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:57:50,828 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-09 10:57:50,829 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 51 transitions, 328 flow. Second operand has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 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 10:57:50,829 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:50,829 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-09 10:57:50,829 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:51,028 INFO L124 PetriNetUnfolderBase]: 721/1251 cut-off events. [2024-11-09 10:57:51,028 INFO L125 PetriNetUnfolderBase]: For 2090/2090 co-relation queries the response was YES. [2024-11-09 10:57:51,031 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4002 conditions, 1251 events. 721/1251 cut-off events. For 2090/2090 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6438 event pairs, 266 based on Foata normal form. 18/1269 useless extension candidates. Maximal degree in co-relation 2697. Up to 686 conditions per place. [2024-11-09 10:57:51,036 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 93 selfloop transitions, 9 changer transitions 0/104 dead transitions. [2024-11-09 10:57:51,036 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 104 transitions, 871 flow [2024-11-09 10:57:51,036 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:57:51,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:57:51,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-11-09 10:57:51,037 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.655 [2024-11-09 10:57:51,037 INFO L175 Difference]: Start difference. First operand has 54 places, 51 transitions, 328 flow. Second operand 5 states and 131 transitions. [2024-11-09 10:57:51,037 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 104 transitions, 871 flow [2024-11-09 10:57:51,043 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 104 transitions, 848 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-09 10:57:51,047 INFO L231 Difference]: Finished difference. Result has 60 places, 55 transitions, 392 flow [2024-11-09 10:57:51,047 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=319, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=392, PETRI_PLACES=60, PETRI_TRANSITIONS=55} [2024-11-09 10:57:51,048 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 20 predicate places. [2024-11-09 10:57:51,048 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 55 transitions, 392 flow [2024-11-09 10:57:51,048 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.6) internal successors, (93), 5 states have internal predecessors, (93), 0 states have call successors, (0), 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 10:57:51,048 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:51,048 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:51,048 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 10:57:51,048 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:51,049 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:51,049 INFO L85 PathProgramCache]: Analyzing trace with hash 452279287, now seen corresponding path program 2 times [2024-11-09 10:57:51,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:51,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726191110] [2024-11-09 10:57:51,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:51,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:51,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:51,185 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 10:57:51,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:51,186 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726191110] [2024-11-09 10:57:51,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726191110] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:51,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:51,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-11-09 10:57:51,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57703011] [2024-11-09 10:57:51,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:51,186 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-09 10:57:51,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:51,187 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-09 10:57:51,187 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-11-09 10:57:51,191 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-09 10:57:51,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 55 transitions, 392 flow. Second operand has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 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 10:57:51,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:51,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-09 10:57:51,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:51,476 INFO L124 PetriNetUnfolderBase]: 767/1317 cut-off events. [2024-11-09 10:57:51,476 INFO L125 PetriNetUnfolderBase]: For 3187/3187 co-relation queries the response was YES. [2024-11-09 10:57:51,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4820 conditions, 1317 events. 767/1317 cut-off events. For 3187/3187 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 6409 event pairs, 183 based on Foata normal form. 60/1377 useless extension candidates. Maximal degree in co-relation 3221. Up to 618 conditions per place. [2024-11-09 10:57:51,488 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 92 selfloop transitions, 28 changer transitions 0/121 dead transitions. [2024-11-09 10:57:51,488 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 121 transitions, 1045 flow [2024-11-09 10:57:51,489 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-09 10:57:51,489 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-09 10:57:51,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-11-09 10:57:51,490 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.596875 [2024-11-09 10:57:51,490 INFO L175 Difference]: Start difference. First operand has 60 places, 55 transitions, 392 flow. Second operand 8 states and 191 transitions. [2024-11-09 10:57:51,490 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 121 transitions, 1045 flow [2024-11-09 10:57:51,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 121 transitions, 1011 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-09 10:57:51,501 INFO L231 Difference]: Finished difference. Result has 72 places, 72 transitions, 659 flow [2024-11-09 10:57:51,501 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=379, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=659, PETRI_PLACES=72, PETRI_TRANSITIONS=72} [2024-11-09 10:57:51,501 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 32 predicate places. [2024-11-09 10:57:51,502 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 72 transitions, 659 flow [2024-11-09 10:57:51,502 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.571428571428573) internal successors, (116), 7 states have internal predecessors, (116), 0 states have call successors, (0), 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 10:57:51,502 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:51,502 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:51,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 10:57:51,503 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:51,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:51,503 INFO L85 PathProgramCache]: Analyzing trace with hash -344928779, now seen corresponding path program 3 times [2024-11-09 10:57:51,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:51,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914000622] [2024-11-09 10:57:51,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:51,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:51,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:51,621 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 10:57:51,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:51,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914000622] [2024-11-09 10:57:51,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914000622] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:51,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:51,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 10:57:51,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453530713] [2024-11-09 10:57:51,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:51,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:57:51,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:51,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:57:51,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:57:51,628 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-09 10:57:51,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 72 transitions, 659 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 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 10:57:51,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:51,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-09 10:57:51,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:51,915 INFO L124 PetriNetUnfolderBase]: 859/1467 cut-off events. [2024-11-09 10:57:51,915 INFO L125 PetriNetUnfolderBase]: For 6568/6568 co-relation queries the response was YES. [2024-11-09 10:57:51,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6605 conditions, 1467 events. 859/1467 cut-off events. For 6568/6568 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7506 event pairs, 266 based on Foata normal form. 8/1475 useless extension candidates. Maximal degree in co-relation 4336. Up to 708 conditions per place. [2024-11-09 10:57:51,932 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 97 selfloop transitions, 31 changer transitions 1/130 dead transitions. [2024-11-09 10:57:51,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 130 transitions, 1446 flow [2024-11-09 10:57:51,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:57:51,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:57:51,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2024-11-09 10:57:51,935 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-09 10:57:51,935 INFO L175 Difference]: Start difference. First operand has 72 places, 72 transitions, 659 flow. Second operand 5 states and 130 transitions. [2024-11-09 10:57:51,936 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 130 transitions, 1446 flow [2024-11-09 10:57:51,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 130 transitions, 1391 flow, removed 14 selfloop flow, removed 1 redundant places. [2024-11-09 10:57:51,957 INFO L231 Difference]: Finished difference. Result has 78 places, 89 transitions, 975 flow [2024-11-09 10:57:51,959 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=632, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=975, PETRI_PLACES=78, PETRI_TRANSITIONS=89} [2024-11-09 10:57:51,960 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 38 predicate places. [2024-11-09 10:57:51,960 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 89 transitions, 975 flow [2024-11-09 10:57:51,960 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 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 10:57:51,960 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:51,960 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:51,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-09 10:57:51,961 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:51,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:51,961 INFO L85 PathProgramCache]: Analyzing trace with hash 882412917, now seen corresponding path program 4 times [2024-11-09 10:57:51,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:51,961 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760014518] [2024-11-09 10:57:51,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:51,962 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:51,976 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:52,086 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 10:57:52,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:52,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760014518] [2024-11-09 10:57:52,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760014518] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:52,087 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:52,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-09 10:57:52,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404432542] [2024-11-09 10:57:52,087 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:52,087 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:57:52,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:52,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:57:52,088 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:57:52,093 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-09 10:57:52,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 89 transitions, 975 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 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 10:57:52,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:52,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-09 10:57:52,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:52,319 INFO L124 PetriNetUnfolderBase]: 853/1459 cut-off events. [2024-11-09 10:57:52,320 INFO L125 PetriNetUnfolderBase]: For 8086/8086 co-relation queries the response was YES. [2024-11-09 10:57:52,324 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7017 conditions, 1459 events. 853/1459 cut-off events. For 8086/8086 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 7270 event pairs, 360 based on Foata normal form. 8/1467 useless extension candidates. Maximal degree in co-relation 4878. Up to 984 conditions per place. [2024-11-09 10:57:52,332 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 75 selfloop transitions, 42 changer transitions 1/119 dead transitions. [2024-11-09 10:57:52,332 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 119 transitions, 1489 flow [2024-11-09 10:57:52,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:57:52,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:57:52,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-11-09 10:57:52,334 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-11-09 10:57:52,334 INFO L175 Difference]: Start difference. First operand has 78 places, 89 transitions, 975 flow. Second operand 5 states and 124 transitions. [2024-11-09 10:57:52,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 119 transitions, 1489 flow [2024-11-09 10:57:52,361 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 119 transitions, 1465 flow, removed 3 selfloop flow, removed 1 redundant places. [2024-11-09 10:57:52,364 INFO L231 Difference]: Finished difference. Result has 84 places, 101 transitions, 1272 flow [2024-11-09 10:57:52,364 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=954, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1272, PETRI_PLACES=84, PETRI_TRANSITIONS=101} [2024-11-09 10:57:52,364 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 44 predicate places. [2024-11-09 10:57:52,365 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 101 transitions, 1272 flow [2024-11-09 10:57:52,365 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 0 states have call successors, (0), 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 10:57:52,365 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:52,365 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:57:52,365 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-09 10:57:52,366 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:52,366 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:52,366 INFO L85 PathProgramCache]: Analyzing trace with hash -1473294665, now seen corresponding path program 5 times [2024-11-09 10:57:52,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:52,366 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356900633] [2024-11-09 10:57:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:52,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:52,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:52,481 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 10:57:52,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:52,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356900633] [2024-11-09 10:57:52,482 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356900633] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:57:52,482 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:57:52,482 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-09 10:57:52,482 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1798325705] [2024-11-09 10:57:52,482 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:52,483 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:57:52,484 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:52,484 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:57:52,486 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-11-09 10:57:52,489 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-09 10:57:52,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 101 transitions, 1272 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:52,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:52,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-09 10:57:52,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:52,775 INFO L124 PetriNetUnfolderBase]: 843/1433 cut-off events. [2024-11-09 10:57:52,775 INFO L125 PetriNetUnfolderBase]: For 9345/9345 co-relation queries the response was YES. [2024-11-09 10:57:52,780 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7365 conditions, 1433 events. 843/1433 cut-off events. For 9345/9345 co-relation queries the response was YES. Maximal size of possible extension queue 86. Compared 7221 event pairs, 242 based on Foata normal form. 12/1445 useless extension candidates. Maximal degree in co-relation 5248. Up to 708 conditions per place. [2024-11-09 10:57:52,788 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 112 selfloop transitions, 41 changer transitions 1/155 dead transitions. [2024-11-09 10:57:52,788 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 155 transitions, 1926 flow [2024-11-09 10:57:52,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:57:52,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:57:52,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-11-09 10:57:52,789 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.65 [2024-11-09 10:57:52,789 INFO L175 Difference]: Start difference. First operand has 84 places, 101 transitions, 1272 flow. Second operand 6 states and 156 transitions. [2024-11-09 10:57:52,789 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 155 transitions, 1926 flow [2024-11-09 10:57:52,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 155 transitions, 1860 flow, removed 17 selfloop flow, removed 1 redundant places. [2024-11-09 10:57:52,828 INFO L231 Difference]: Finished difference. Result has 90 places, 105 transitions, 1385 flow [2024-11-09 10:57:52,828 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1206, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1385, PETRI_PLACES=90, PETRI_TRANSITIONS=105} [2024-11-09 10:57:52,828 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 50 predicate places. [2024-11-09 10:57:52,828 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 105 transitions, 1385 flow [2024-11-09 10:57:52,829 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:57:52,829 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:52,829 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] [2024-11-09 10:57:52,829 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-09 10:57:52,829 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:52,829 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:52,829 INFO L85 PathProgramCache]: Analyzing trace with hash -1203485320, now seen corresponding path program 1 times [2024-11-09 10:57:52,830 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:52,830 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160840042] [2024-11-09 10:57:52,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:52,830 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:52,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:52,986 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 10:57:52,986 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:52,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160840042] [2024-11-09 10:57:52,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160840042] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:52,987 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1014939972] [2024-11-09 10:57:52,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:52,987 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:52,987 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:52,989 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:52,991 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-09 10:57:53,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:53,062 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-09 10:57:53,063 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:53,096 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 15 treesize of output 1 [2024-11-09 10:57:53,218 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 10:57:53,219 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:53,355 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 72 treesize of output 64 [2024-11-09 10:57:53,379 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:57:53,379 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 131 treesize of output 129 [2024-11-09 10:57:53,767 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 10:57:53,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1014939972] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:53,767 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:53,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 18 [2024-11-09 10:57:53,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [628779764] [2024-11-09 10:57:53,767 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:53,768 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:57:53,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:53,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:57:53,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=249, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:57:54,067 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-09 10:57:54,068 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 105 transitions, 1385 flow. Second operand has 18 states, 18 states have (on average 18.22222222222222) internal successors, (328), 18 states have internal predecessors, (328), 0 states have call successors, (0), 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 10:57:54,068 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:54,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-09 10:57:54,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:55,913 INFO L124 PetriNetUnfolderBase]: 2665/4619 cut-off events. [2024-11-09 10:57:55,914 INFO L125 PetriNetUnfolderBase]: For 22279/22279 co-relation queries the response was YES. [2024-11-09 10:57:55,929 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20344 conditions, 4619 events. 2665/4619 cut-off events. For 22279/22279 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 27067 event pairs, 56 based on Foata normal form. 24/4643 useless extension candidates. Maximal degree in co-relation 18204. Up to 767 conditions per place. [2024-11-09 10:57:55,949 INFO L140 encePairwiseOnDemand]: 25/40 looper letters, 280 selfloop transitions, 143 changer transitions 140/565 dead transitions. [2024-11-09 10:57:55,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 565 transitions, 5805 flow [2024-11-09 10:57:55,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2024-11-09 10:57:55,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2024-11-09 10:57:55,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 1157 transitions. [2024-11-09 10:57:55,955 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6026041666666667 [2024-11-09 10:57:55,955 INFO L175 Difference]: Start difference. First operand has 90 places, 105 transitions, 1385 flow. Second operand 48 states and 1157 transitions. [2024-11-09 10:57:55,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 565 transitions, 5805 flow [2024-11-09 10:57:56,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 565 transitions, 5683 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-11-09 10:57:56,041 INFO L231 Difference]: Finished difference. Result has 151 places, 197 transitions, 2459 flow [2024-11-09 10:57:56,042 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1334, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=48, PETRI_FLOW=2459, PETRI_PLACES=151, PETRI_TRANSITIONS=197} [2024-11-09 10:57:56,042 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 111 predicate places. [2024-11-09 10:57:56,043 INFO L471 AbstractCegarLoop]: Abstraction has has 151 places, 197 transitions, 2459 flow [2024-11-09 10:57:56,043 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 18.22222222222222) internal successors, (328), 18 states have internal predecessors, (328), 0 states have call successors, (0), 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 10:57:56,043 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:56,043 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] [2024-11-09 10:57:56,060 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-09 10:57:56,244 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:56,244 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:56,245 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:56,245 INFO L85 PathProgramCache]: Analyzing trace with hash -128894715, now seen corresponding path program 1 times [2024-11-09 10:57:56,245 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:56,245 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222682803] [2024-11-09 10:57:56,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:56,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:56,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:56,410 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 10:57:56,410 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:56,410 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222682803] [2024-11-09 10:57:56,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [222682803] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:56,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558187874] [2024-11-09 10:57:56,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:56,411 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:56,411 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:56,413 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:56,415 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-09 10:57:56,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:56,483 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-09 10:57:56,484 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:56,534 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 10:57:56,539 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 10:57:56,539 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:56,564 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:57:56,565 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 19 treesize of output 7 [2024-11-09 10:57:56,579 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 10:57:56,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558187874] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:56,579 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:57:56,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5, 4] total 8 [2024-11-09 10:57:56,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1090653730] [2024-11-09 10:57:56,579 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:57:56,580 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:57:56,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:56,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:57:56,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-09 10:57:56,602 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-11-09 10:57:56,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 151 places, 197 transitions, 2459 flow. Second operand has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 10:57:56,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:56,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-11-09 10:57:56,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:57,134 INFO L124 PetriNetUnfolderBase]: 2413/4212 cut-off events. [2024-11-09 10:57:57,135 INFO L125 PetriNetUnfolderBase]: For 24116/24116 co-relation queries the response was YES. [2024-11-09 10:57:57,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19943 conditions, 4212 events. 2413/4212 cut-off events. For 24116/24116 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 24362 event pairs, 841 based on Foata normal form. 4/4216 useless extension candidates. Maximal degree in co-relation 19767. Up to 3170 conditions per place. [2024-11-09 10:57:57,169 INFO L140 encePairwiseOnDemand]: 34/40 looper letters, 193 selfloop transitions, 51 changer transitions 1/247 dead transitions. [2024-11-09 10:57:57,169 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 247 transitions, 3372 flow [2024-11-09 10:57:57,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:57:57,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:57:57,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2024-11-09 10:57:57,170 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.725 [2024-11-09 10:57:57,170 INFO L175 Difference]: Start difference. First operand has 151 places, 197 transitions, 2459 flow. Second operand 4 states and 116 transitions. [2024-11-09 10:57:57,170 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 247 transitions, 3372 flow [2024-11-09 10:57:57,263 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 247 transitions, 2962 flow, removed 147 selfloop flow, removed 17 redundant places. [2024-11-09 10:57:57,267 INFO L231 Difference]: Finished difference. Result has 128 places, 216 transitions, 2445 flow [2024-11-09 10:57:57,267 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2087, PETRI_DIFFERENCE_MINUEND_PLACES=123, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2445, PETRI_PLACES=128, PETRI_TRANSITIONS=216} [2024-11-09 10:57:57,267 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 88 predicate places. [2024-11-09 10:57:57,268 INFO L471 AbstractCegarLoop]: Abstraction has has 128 places, 216 transitions, 2445 flow [2024-11-09 10:57:57,268 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.0) internal successors, (80), 4 states have internal predecessors, (80), 0 states have call successors, (0), 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 10:57:57,268 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:57,268 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] [2024-11-09 10:57:57,285 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-09 10:57:57,469 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-09 10:57:57,469 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:57,470 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:57,470 INFO L85 PathProgramCache]: Analyzing trace with hash 1686743607, now seen corresponding path program 2 times [2024-11-09 10:57:57,470 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:57,470 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082994314] [2024-11-09 10:57:57,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:57,470 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:57,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:57,606 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:57:57,607 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:57,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082994314] [2024-11-09 10:57:57,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082994314] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:57,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378974001] [2024-11-09 10:57:57,607 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:57:57,608 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:57,608 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:57,609 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:57,611 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-09 10:57:57,715 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:57:57,715 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:57,716 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 10:57:57,717 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:57,787 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:57:57,788 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:57:58,004 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:57:58,004 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378974001] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:57:58,004 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:57:58,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2024-11-09 10:57:58,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723212011] [2024-11-09 10:57:58,005 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:57:58,005 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:57:58,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:57:58,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:57:58,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:57:58,034 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-09 10:57:58,034 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 128 places, 216 transitions, 2445 flow. Second operand has 14 states, 14 states have (on average 16.285714285714285) internal successors, (228), 14 states have internal predecessors, (228), 0 states have call successors, (0), 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 10:57:58,035 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:57:58,035 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-09 10:57:58,035 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:57:59,210 INFO L124 PetriNetUnfolderBase]: 3052/5364 cut-off events. [2024-11-09 10:57:59,211 INFO L125 PetriNetUnfolderBase]: For 23276/23276 co-relation queries the response was YES. [2024-11-09 10:57:59,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23656 conditions, 5364 events. 3052/5364 cut-off events. For 23276/23276 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 32547 event pairs, 535 based on Foata normal form. 15/5379 useless extension candidates. Maximal degree in co-relation 23058. Up to 1536 conditions per place. [2024-11-09 10:57:59,241 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 271 selfloop transitions, 206 changer transitions 4/482 dead transitions. [2024-11-09 10:57:59,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 482 transitions, 5475 flow [2024-11-09 10:57:59,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 10:57:59,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-09 10:57:59,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 576 transitions. [2024-11-09 10:57:59,244 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-11-09 10:57:59,244 INFO L175 Difference]: Start difference. First operand has 128 places, 216 transitions, 2445 flow. Second operand 27 states and 576 transitions. [2024-11-09 10:57:59,244 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 482 transitions, 5475 flow [2024-11-09 10:57:59,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 482 transitions, 5437 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-11-09 10:57:59,344 INFO L231 Difference]: Finished difference. Result has 163 places, 311 transitions, 3991 flow [2024-11-09 10:57:59,344 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=2417, PETRI_DIFFERENCE_MINUEND_PLACES=128, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=216, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=3991, PETRI_PLACES=163, PETRI_TRANSITIONS=311} [2024-11-09 10:57:59,345 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 123 predicate places. [2024-11-09 10:57:59,346 INFO L471 AbstractCegarLoop]: Abstraction has has 163 places, 311 transitions, 3991 flow [2024-11-09 10:57:59,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.285714285714285) internal successors, (228), 14 states have internal predecessors, (228), 0 states have call successors, (0), 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 10:57:59,346 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:57:59,346 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] [2024-11-09 10:57:59,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-09 10:57:59,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-09 10:57:59,547 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:57:59,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:57:59,547 INFO L85 PathProgramCache]: Analyzing trace with hash 1588302485, now seen corresponding path program 3 times [2024-11-09 10:57:59,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:57:59,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1191205126] [2024-11-09 10:57:59,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:57:59,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:57:59,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:57:59,757 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:57:59,758 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:57:59,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1191205126] [2024-11-09 10:57:59,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1191205126] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:57:59,758 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366834029] [2024-11-09 10:57:59,758 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:57:59,758 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:57:59,759 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:57:59,760 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:57:59,762 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-09 10:57:59,855 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:57:59,855 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:57:59,856 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 10:57:59,858 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:57:59,914 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:57:59,914 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:58:00,060 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:58:00,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [366834029] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:58:00,061 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:58:00,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2024-11-09 10:58:00,061 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114805137] [2024-11-09 10:58:00,062 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:58:00,062 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 10:58:00,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:58:00,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 10:58:00,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2024-11-09 10:58:00,113 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-09 10:58:00,114 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 163 places, 311 transitions, 3991 flow. Second operand has 17 states, 17 states have (on average 15.941176470588236) internal successors, (271), 17 states have internal predecessors, (271), 0 states have call successors, (0), 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 10:58:00,114 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:58:00,114 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-09 10:58:00,114 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:58:02,364 INFO L124 PetriNetUnfolderBase]: 4867/8562 cut-off events. [2024-11-09 10:58:02,364 INFO L125 PetriNetUnfolderBase]: For 51557/51557 co-relation queries the response was YES. [2024-11-09 10:58:02,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42557 conditions, 8562 events. 4867/8562 cut-off events. For 51557/51557 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 55675 event pairs, 443 based on Foata normal form. 18/8580 useless extension candidates. Maximal degree in co-relation 39918. Up to 1500 conditions per place. [2024-11-09 10:58:02,412 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 382 selfloop transitions, 496 changer transitions 1/880 dead transitions. [2024-11-09 10:58:02,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 195 places, 880 transitions, 11691 flow [2024-11-09 10:58:02,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2024-11-09 10:58:02,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 33 states. [2024-11-09 10:58:02,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 33 states to 33 states and 738 transitions. [2024-11-09 10:58:02,414 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5590909090909091 [2024-11-09 10:58:02,414 INFO L175 Difference]: Start difference. First operand has 163 places, 311 transitions, 3991 flow. Second operand 33 states and 738 transitions. [2024-11-09 10:58:02,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 195 places, 880 transitions, 11691 flow [2024-11-09 10:58:02,675 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 195 places, 880 transitions, 11271 flow, removed 210 selfloop flow, removed 0 redundant places. [2024-11-09 10:58:02,684 INFO L231 Difference]: Finished difference. Result has 220 places, 659 transitions, 10019 flow [2024-11-09 10:58:02,684 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=3841, PETRI_DIFFERENCE_MINUEND_PLACES=163, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=311, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=33, PETRI_FLOW=10019, PETRI_PLACES=220, PETRI_TRANSITIONS=659} [2024-11-09 10:58:02,684 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 180 predicate places. [2024-11-09 10:58:02,685 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 659 transitions, 10019 flow [2024-11-09 10:58:02,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 15.941176470588236) internal successors, (271), 17 states have internal predecessors, (271), 0 states have call successors, (0), 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 10:58:02,685 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:58:02,685 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] [2024-11-09 10:58:02,697 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-09 10:58:02,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-09 10:58:02,886 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:58:02,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:58:02,886 INFO L85 PathProgramCache]: Analyzing trace with hash 386298489, now seen corresponding path program 4 times [2024-11-09 10:58:02,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:58:02,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1964757997] [2024-11-09 10:58:02,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:58:02,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:58:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:58:03,041 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:58:03,042 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:58:03,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1964757997] [2024-11-09 10:58:03,042 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1964757997] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:58:03,042 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263132571] [2024-11-09 10:58:03,042 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-09 10:58:03,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:58:03,043 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:58:03,044 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:58:03,046 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-09 10:58:03,221 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-09 10:58:03,221 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:58:03,225 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 10:58:03,226 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:58:03,272 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:58:03,272 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:58:03,362 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:58:03,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263132571] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:58:03,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:58:03,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 8] total 14 [2024-11-09 10:58:03,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255870287] [2024-11-09 10:58:03,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:58:03,363 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-09 10:58:03,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:58:03,364 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-09 10:58:03,364 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2024-11-09 10:58:03,374 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-09 10:58:03,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 659 transitions, 10019 flow. Second operand has 14 states, 14 states have (on average 16.285714285714285) internal successors, (228), 14 states have internal predecessors, (228), 0 states have call successors, (0), 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 10:58:03,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:58:03,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-09 10:58:03,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:58:08,019 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [] [2024-11-09 10:58:10,075 INFO L124 PetriNetUnfolderBase]: 4938/8753 cut-off events. [2024-11-09 10:58:10,075 INFO L125 PetriNetUnfolderBase]: For 84599/84599 co-relation queries the response was YES. [2024-11-09 10:58:10,110 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53332 conditions, 8753 events. 4938/8753 cut-off events. For 84599/84599 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 57911 event pairs, 908 based on Foata normal form. 18/8771 useless extension candidates. Maximal degree in co-relation 52348. Up to 2866 conditions per place. [2024-11-09 10:58:10,136 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 516 selfloop transitions, 425 changer transitions 9/951 dead transitions. [2024-11-09 10:58:10,136 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 951 transitions, 15123 flow [2024-11-09 10:58:10,137 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2024-11-09 10:58:10,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 27 states. [2024-11-09 10:58:10,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 556 transitions. [2024-11-09 10:58:10,138 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5148148148148148 [2024-11-09 10:58:10,138 INFO L175 Difference]: Start difference. First operand has 220 places, 659 transitions, 10019 flow. Second operand 27 states and 556 transitions. [2024-11-09 10:58:10,138 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 951 transitions, 15123 flow [2024-11-09 10:58:10,814 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 246 places, 951 transitions, 14525 flow, removed 299 selfloop flow, removed 0 redundant places. [2024-11-09 10:58:10,825 INFO L231 Difference]: Finished difference. Result has 256 places, 724 transitions, 11748 flow [2024-11-09 10:58:10,826 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=9621, PETRI_DIFFERENCE_MINUEND_PLACES=220, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=659, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=363, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=288, PETRI_DIFFERENCE_SUBTRAHEND_STATES=27, PETRI_FLOW=11748, PETRI_PLACES=256, PETRI_TRANSITIONS=724} [2024-11-09 10:58:10,826 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 216 predicate places. [2024-11-09 10:58:10,826 INFO L471 AbstractCegarLoop]: Abstraction has has 256 places, 724 transitions, 11748 flow [2024-11-09 10:58:10,826 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.285714285714285) internal successors, (228), 14 states have internal predecessors, (228), 0 states have call successors, (0), 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 10:58:10,827 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:58:10,827 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] [2024-11-09 10:58:10,890 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-09 10:58:11,027 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:58:11,027 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:58:11,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:58:11,028 INFO L85 PathProgramCache]: Analyzing trace with hash -349391455, now seen corresponding path program 5 times [2024-11-09 10:58:11,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:58:11,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [996866055] [2024-11-09 10:58:11,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:58:11,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:58:11,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:58:11,225 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:58:11,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:58:11,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [996866055] [2024-11-09 10:58:11,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [996866055] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:58:11,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1523964204] [2024-11-09 10:58:11,227 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-09 10:58:11,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:58:11,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:58:11,229 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:58:11,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-09 10:58:11,400 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2024-11-09 10:58:11,400 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:58:11,404 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 10:58:11,405 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:58:11,471 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:58:11,471 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:58:11,733 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:58:11,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1523964204] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:58:11,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:58:11,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2024-11-09 10:58:11,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773487656] [2024-11-09 10:58:11,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:58:11,734 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-09 10:58:11,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:58:11,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-09 10:58:11,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=166, Unknown=0, NotChecked=0, Total=240 [2024-11-09 10:58:11,785 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-09 10:58:11,786 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 724 transitions, 11748 flow. Second operand has 16 states, 16 states have (on average 16.0) internal successors, (256), 16 states have internal predecessors, (256), 0 states have call successors, (0), 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 10:58:11,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:58:11,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-09 10:58:11,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:58:15,994 INFO L124 PetriNetUnfolderBase]: 5878/10473 cut-off events. [2024-11-09 10:58:15,994 INFO L125 PetriNetUnfolderBase]: For 121795/121795 co-relation queries the response was YES. [2024-11-09 10:58:16,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68056 conditions, 10473 events. 5878/10473 cut-off events. For 121795/121795 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 72990 event pairs, 1255 based on Foata normal form. 24/10497 useless extension candidates. Maximal degree in co-relation 66441. Up to 3883 conditions per place. [2024-11-09 10:58:16,079 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 424 selfloop transitions, 859 changer transitions 1/1285 dead transitions. [2024-11-09 10:58:16,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 294 places, 1285 transitions, 21337 flow [2024-11-09 10:58:16,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-09 10:58:16,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-09 10:58:16,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 907 transitions. [2024-11-09 10:58:16,082 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.566875 [2024-11-09 10:58:16,082 INFO L175 Difference]: Start difference. First operand has 256 places, 724 transitions, 11748 flow. Second operand 40 states and 907 transitions. [2024-11-09 10:58:16,082 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 294 places, 1285 transitions, 21337 flow [2024-11-09 10:58:17,307 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 285 places, 1285 transitions, 20498 flow, removed 108 selfloop flow, removed 9 redundant places. [2024-11-09 10:58:17,378 INFO L231 Difference]: Finished difference. Result has 306 places, 1108 transitions, 20196 flow [2024-11-09 10:58:17,379 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=11195, PETRI_DIFFERENCE_MINUEND_PLACES=246, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=526, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=128, PETRI_DIFFERENCE_SUBTRAHEND_STATES=40, PETRI_FLOW=20196, PETRI_PLACES=306, PETRI_TRANSITIONS=1108} [2024-11-09 10:58:17,379 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 266 predicate places. [2024-11-09 10:58:17,379 INFO L471 AbstractCegarLoop]: Abstraction has has 306 places, 1108 transitions, 20196 flow [2024-11-09 10:58:17,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.0) internal successors, (256), 16 states have internal predecessors, (256), 0 states have call successors, (0), 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 10:58:17,380 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:58:17,380 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] [2024-11-09 10:58:17,392 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-09 10:58:17,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:58:17,581 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:58:17,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:58:17,581 INFO L85 PathProgramCache]: Analyzing trace with hash -1181411821, now seen corresponding path program 6 times [2024-11-09 10:58:17,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:58:17,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149106249] [2024-11-09 10:58:17,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:58:17,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:58:17,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:58:17,778 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:58:17,779 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:58:17,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149106249] [2024-11-09 10:58:17,779 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149106249] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:58:17,779 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1569009916] [2024-11-09 10:58:17,779 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-09 10:58:17,779 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:58:17,780 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:58:17,781 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:58:17,783 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-09 10:58:17,905 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2024-11-09 10:58:17,905 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:58:17,907 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 10:58:17,908 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:58:18,025 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:58:18,025 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:58:18,280 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:58:18,280 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1569009916] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:58:18,280 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:58:18,280 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-09 10:58:18,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922109475] [2024-11-09 10:58:18,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:58:18,281 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:58:18,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:58:18,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:58:18,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:58:18,325 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-09 10:58:18,326 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 306 places, 1108 transitions, 20196 flow. Second operand has 18 states, 18 states have (on average 16.0) internal successors, (288), 18 states have internal predecessors, (288), 0 states have call successors, (0), 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 10:58:18,326 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:58:18,326 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-09 10:58:18,326 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:58:22,845 INFO L124 PetriNetUnfolderBase]: 6112/10846 cut-off events. [2024-11-09 10:58:22,846 INFO L125 PetriNetUnfolderBase]: For 149068/149068 co-relation queries the response was YES. [2024-11-09 10:58:22,911 INFO L83 FinitePrefix]: Finished finitePrefix Result has 77277 conditions, 10846 events. 6112/10846 cut-off events. For 149068/149068 co-relation queries the response was YES. Maximal size of possible extension queue 375. Compared 75473 event pairs, 1359 based on Foata normal form. 114/10960 useless extension candidates. Maximal degree in co-relation 76786. Up to 4021 conditions per place. [2024-11-09 10:58:22,952 INFO L140 encePairwiseOnDemand]: 29/40 looper letters, 709 selfloop transitions, 658 changer transitions 1/1369 dead transitions. [2024-11-09 10:58:22,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 336 places, 1369 transitions, 26135 flow [2024-11-09 10:58:22,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2024-11-09 10:58:22,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 31 states. [2024-11-09 10:58:22,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 682 transitions. [2024-11-09 10:58:22,954 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.55 [2024-11-09 10:58:22,954 INFO L175 Difference]: Start difference. First operand has 306 places, 1108 transitions, 20196 flow. Second operand 31 states and 682 transitions. [2024-11-09 10:58:22,955 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 336 places, 1369 transitions, 26135 flow [2024-11-09 10:58:25,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 327 places, 1369 transitions, 24373 flow, removed 578 selfloop flow, removed 9 redundant places. [2024-11-09 10:58:25,045 INFO L231 Difference]: Finished difference. Result has 338 places, 1182 transitions, 22056 flow [2024-11-09 10:58:25,046 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=18411, PETRI_DIFFERENCE_MINUEND_PLACES=297, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1093, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=573, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=31, PETRI_FLOW=22056, PETRI_PLACES=338, PETRI_TRANSITIONS=1182} [2024-11-09 10:58:25,046 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 298 predicate places. [2024-11-09 10:58:25,046 INFO L471 AbstractCegarLoop]: Abstraction has has 338 places, 1182 transitions, 22056 flow [2024-11-09 10:58:25,046 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 16.0) internal successors, (288), 18 states have internal predecessors, (288), 0 states have call successors, (0), 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 10:58:25,046 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:58:25,047 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] [2024-11-09 10:58:25,059 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-09 10:58:25,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-09 10:58:25,247 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:58:25,247 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:58:25,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1317413601, now seen corresponding path program 7 times [2024-11-09 10:58:25,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:58:25,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [551940158] [2024-11-09 10:58:25,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:58:25,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:58:25,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:58:25,387 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:58:25,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:58:25,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [551940158] [2024-11-09 10:58:25,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [551940158] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:58:25,388 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598069375] [2024-11-09 10:58:25,388 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-09 10:58:25,388 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:58:25,388 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:58:25,390 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:58:25,392 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-09 10:58:25,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:58:25,470 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 10:58:25,471 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:58:25,516 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:58:25,516 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:58:25,683 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:58:25,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [598069375] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:58:25,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:58:25,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 15 [2024-11-09 10:58:25,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143643795] [2024-11-09 10:58:25,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:58:25,685 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-09 10:58:25,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:58:25,685 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-09 10:58:25,686 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2024-11-09 10:58:25,707 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-09 10:58:25,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 338 places, 1182 transitions, 22056 flow. Second operand has 15 states, 15 states have (on average 16.0) internal successors, (240), 15 states have internal predecessors, (240), 0 states have call successors, (0), 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 10:58:25,707 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:58:25,707 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-09 10:58:25,707 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:58:30,525 INFO L124 PetriNetUnfolderBase]: 6987/12423 cut-off events. [2024-11-09 10:58:30,525 INFO L125 PetriNetUnfolderBase]: For 181606/181606 co-relation queries the response was YES. [2024-11-09 10:58:30,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 91635 conditions, 12423 events. 6987/12423 cut-off events. For 181606/181606 co-relation queries the response was YES. Maximal size of possible extension queue 474. Compared 89316 event pairs, 1676 based on Foata normal form. 30/12453 useless extension candidates. Maximal degree in co-relation 90754. Up to 5808 conditions per place. [2024-11-09 10:58:30,676 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 541 selfloop transitions, 1087 changer transitions 5/1634 dead transitions. [2024-11-09 10:58:30,676 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 1634 transitions, 32495 flow [2024-11-09 10:58:30,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-09 10:58:30,677 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-09 10:58:30,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 818 transitions. [2024-11-09 10:58:30,678 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5243589743589744 [2024-11-09 10:58:30,678 INFO L175 Difference]: Start difference. First operand has 338 places, 1182 transitions, 22056 flow. Second operand 39 states and 818 transitions. [2024-11-09 10:58:30,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 1634 transitions, 32495 flow [2024-11-09 10:58:33,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 1634 transitions, 32116 flow, removed 89 selfloop flow, removed 4 redundant places. [2024-11-09 10:58:34,004 INFO L231 Difference]: Finished difference. Result has 391 places, 1484 transitions, 31797 flow [2024-11-09 10:58:34,005 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=21753, PETRI_DIFFERENCE_MINUEND_PLACES=334, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=809, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=31797, PETRI_PLACES=391, PETRI_TRANSITIONS=1484} [2024-11-09 10:58:34,005 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 351 predicate places. [2024-11-09 10:58:34,005 INFO L471 AbstractCegarLoop]: Abstraction has has 391 places, 1484 transitions, 31797 flow [2024-11-09 10:58:34,005 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 16.0) internal successors, (240), 15 states have internal predecessors, (240), 0 states have call successors, (0), 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 10:58:34,005 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:58:34,006 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] [2024-11-09 10:58:34,018 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-09 10:58:34,206 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-09 10:58:34,206 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:58:34,207 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:58:34,207 INFO L85 PathProgramCache]: Analyzing trace with hash 578641119, now seen corresponding path program 8 times [2024-11-09 10:58:34,207 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:58:34,207 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160526523] [2024-11-09 10:58:34,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:58:34,207 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:58:34,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:58:34,383 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:58:34,384 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:58:34,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160526523] [2024-11-09 10:58:34,384 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160526523] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:58:34,384 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023344774] [2024-11-09 10:58:34,384 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:58:34,385 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:58:34,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:58:34,386 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:58:34,387 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-09 10:58:34,534 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:58:34,535 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:58:34,536 INFO L255 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 10:58:34,537 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:58:34,618 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:58:34,619 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:58:34,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:58:34,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1023344774] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:58:34,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:58:34,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 18 [2024-11-09 10:58:34,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792715893] [2024-11-09 10:58:34,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:58:34,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:58:34,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:58:34,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:58:34,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:58:34,817 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-09 10:58:34,817 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 1484 transitions, 31797 flow. Second operand has 18 states, 18 states have (on average 16.0) internal successors, (288), 18 states have internal predecessors, (288), 0 states have call successors, (0), 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 10:58:34,817 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:58:34,817 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-09 10:58:34,817 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:58:42,029 INFO L124 PetriNetUnfolderBase]: 7361/13120 cut-off events. [2024-11-09 10:58:42,029 INFO L125 PetriNetUnfolderBase]: For 245315/245315 co-relation queries the response was YES. [2024-11-09 10:58:42,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 106860 conditions, 13120 events. 7361/13120 cut-off events. For 245315/245315 co-relation queries the response was YES. Maximal size of possible extension queue 528. Compared 95745 event pairs, 1630 based on Foata normal form. 138/13258 useless extension candidates. Maximal degree in co-relation 106291. Up to 5620 conditions per place. [2024-11-09 10:58:42,178 INFO L140 encePairwiseOnDemand]: 28/40 looper letters, 777 selfloop transitions, 1052 changer transitions 2/1832 dead transitions. [2024-11-09 10:58:42,178 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 427 places, 1832 transitions, 41155 flow [2024-11-09 10:58:42,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2024-11-09 10:58:42,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2024-11-09 10:58:42,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 815 transitions. [2024-11-09 10:58:42,181 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5506756756756757 [2024-11-09 10:58:42,181 INFO L175 Difference]: Start difference. First operand has 391 places, 1484 transitions, 31797 flow. Second operand 37 states and 815 transitions. [2024-11-09 10:58:42,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 427 places, 1832 transitions, 41155 flow [2024-11-09 10:58:46,125 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 423 places, 1832 transitions, 40323 flow, removed 244 selfloop flow, removed 4 redundant places. [2024-11-09 10:58:46,155 INFO L231 Difference]: Finished difference. Result has 440 places, 1637 transitions, 38541 flow [2024-11-09 10:58:46,156 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=30915, PETRI_DIFFERENCE_MINUEND_PLACES=387, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=1477, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=901, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=504, PETRI_DIFFERENCE_SUBTRAHEND_STATES=37, PETRI_FLOW=38541, PETRI_PLACES=440, PETRI_TRANSITIONS=1637} [2024-11-09 10:58:46,157 INFO L277 CegarLoopForPetriNet]: 40 programPoint places, 400 predicate places. [2024-11-09 10:58:46,157 INFO L471 AbstractCegarLoop]: Abstraction has has 440 places, 1637 transitions, 38541 flow [2024-11-09 10:58:46,157 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 16.0) internal successors, (288), 18 states have internal predecessors, (288), 0 states have call successors, (0), 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 10:58:46,157 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:58:46,157 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] [2024-11-09 10:58:46,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-09 10:58:46,358 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-09 10:58:46,358 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-09 10:58:46,358 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:58:46,359 INFO L85 PathProgramCache]: Analyzing trace with hash 756282119, now seen corresponding path program 9 times [2024-11-09 10:58:46,359 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:58:46,359 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043183947] [2024-11-09 10:58:46,359 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:58:46,359 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:58:46,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:58:46,554 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:58:46,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:58:46,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043183947] [2024-11-09 10:58:46,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1043183947] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:58:46,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2059361152] [2024-11-09 10:58:46,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:58:46,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:58:46,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:58:46,558 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:58:46,561 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-09 10:58:46,740 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-09 10:58:46,741 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:58:46,742 INFO L255 TraceCheckSpWp]: Trace formula consists of 156 conjuncts, 11 conjuncts are in the unsatisfiable core [2024-11-09 10:58:46,743 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:58:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:58:46,853 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:58:47,005 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:58:47,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2059361152] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:58:47,005 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:58:47,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 19 [2024-11-09 10:58:47,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1868710115] [2024-11-09 10:58:47,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:58:47,006 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-09 10:58:47,006 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:58:47,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-09 10:58:47,007 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2024-11-09 10:58:47,030 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 40 [2024-11-09 10:58:47,031 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 440 places, 1637 transitions, 38541 flow. Second operand has 19 states, 19 states have (on average 15.947368421052632) internal successors, (303), 19 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:58:47,031 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:58:47,031 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 40 [2024-11-09 10:58:47,031 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:58:54,917 INFO L124 PetriNetUnfolderBase]: 8069/14209 cut-off events. [2024-11-09 10:58:54,917 INFO L125 PetriNetUnfolderBase]: For 317413/317413 co-relation queries the response was YES. [2024-11-09 10:58:55,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 125962 conditions, 14209 events. 8069/14209 cut-off events. For 317413/317413 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 102861 event pairs, 480 based on Foata normal form. 160/14369 useless extension candidates. Maximal degree in co-relation 125580. Up to 2554 conditions per place. [2024-11-09 10:58:55,139 INFO L140 encePairwiseOnDemand]: 27/40 looper letters, 568 selfloop transitions, 1420 changer transitions 3/1992 dead transitions. [2024-11-09 10:58:55,139 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 476 places, 1992 transitions, 48308 flow [2024-11-09 10:58:55,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2024-11-09 10:58:55,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2024-11-09 10:58:55,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 866 transitions. [2024-11-09 10:58:55,141 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.54125 [2024-11-09 10:58:55,141 INFO L175 Difference]: Start difference. First operand has 440 places, 1637 transitions, 38541 flow. Second operand 40 states and 866 transitions. [2024-11-09 10:58:55,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 476 places, 1992 transitions, 48308 flow