./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-commit-1.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 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:47:09,311 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:47:09,371 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:47:09,377 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:47:09,377 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:47:09,404 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:47:09,405 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:47:09,405 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:47:09,406 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:47:09,406 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:47:09,407 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:47:09,407 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:47:09,407 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:47:09,408 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:47:09,408 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:47:09,409 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:47:09,409 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:47:09,411 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:47:09,411 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:47:09,411 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:47:09,412 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:47:09,412 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:47:09,416 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:47:09,417 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:47:09,417 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:47:09,417 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:47:09,417 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:47:09,418 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:47:09,418 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:47:09,418 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:47:09,418 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:47:09,418 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:47:09,419 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:47:09,419 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:47:09,419 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:47:09,419 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:47:09,420 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:47:09,420 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:47:09,420 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:47:09,420 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:47:09,421 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:47:09,421 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:47:09,421 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 73c55a951ef2b92a665c2c32d76e33a5a03bdbde67ee3c8e6748faf493088c7e [2024-11-22 21:47:09,716 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:47:09,742 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:47:09,746 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:47:09,747 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:47:09,748 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:47:09,749 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2024-11-22 21:47:11,121 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:47:11,344 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:47:11,345 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-commit-1.wvr.c [2024-11-22 21:47:11,352 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/718e37ca0/16def24e9f774aadbf5d8a6004be8e83/FLAG7baa7f298 [2024-11-22 21:47:11,365 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/718e37ca0/16def24e9f774aadbf5d8a6004be8e83 [2024-11-22 21:47:11,368 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:47:11,369 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:47:11,370 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:47:11,371 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:47:11,376 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:47:11,377 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:47:11" (1/1) ... [2024-11-22 21:47:11,380 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f3ab4e8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:11, skipping insertion in model container [2024-11-22 21:47:11,381 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:47:11" (1/1) ... [2024-11-22 21:47:11,406 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:47:11,640 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:47:11,646 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:47:11,654 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:47:11,681 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:47:11,698 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:47:11,698 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:11 WrapperNode [2024-11-22 21:47:11,698 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:47:11,699 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:47:11,699 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:47:11,700 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:47:11,707 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:11" (1/1) ... [2024-11-22 21:47:11,714 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:11" (1/1) ... [2024-11-22 21:47:11,750 INFO L138 Inliner]: procedures = 24, calls = 54, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 339 [2024-11-22 21:47:11,750 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:47:11,751 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:47:11,751 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:47:11,751 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:47:11,776 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:11" (1/1) ... [2024-11-22 21:47:11,776 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:11" (1/1) ... [2024-11-22 21:47:11,785 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:11" (1/1) ... [2024-11-22 21:47:11,817 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-22 21:47:11,817 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:11" (1/1) ... [2024-11-22 21:47:11,817 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:11" (1/1) ... [2024-11-22 21:47:11,834 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:11" (1/1) ... [2024-11-22 21:47:11,839 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:11" (1/1) ... [2024-11-22 21:47:11,842 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:11" (1/1) ... [2024-11-22 21:47:11,844 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:11" (1/1) ... [2024-11-22 21:47:11,848 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:47:11,850 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:47:11,850 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:47:11,850 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:47:11,851 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:11" (1/1) ... [2024-11-22 21:47:11,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:47:11,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:11,888 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) [2024-11-22 21:47:11,891 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 [2024-11-22 21:47:11,940 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:47:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:47:11,941 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:47:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:47:11,941 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:47:11,941 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-22 21:47:11,941 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-22 21:47:11,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:47:11,942 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:47:11,943 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:47:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:47:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-22 21:47:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-22 21:47:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:47:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:47:11,944 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:47:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:47:11,944 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:47:11,947 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:47:12,169 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:47:12,172 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:47:12,724 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:47:12,724 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:47:13,207 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:47:13,207 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-22 21:47:13,208 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:47:13 BoogieIcfgContainer [2024-11-22 21:47:13,208 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:47:13,212 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:47:13,212 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:47:13,216 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:47:13,217 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:47:11" (1/3) ... [2024-11-22 21:47:13,218 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9dd503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:47:13, skipping insertion in model container [2024-11-22 21:47:13,218 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:47:11" (2/3) ... [2024-11-22 21:47:13,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5d9dd503 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:47:13, skipping insertion in model container [2024-11-22 21:47:13,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:47:13" (3/3) ... [2024-11-22 21:47:13,221 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-commit-1.wvr.c [2024-11-22 21:47:13,240 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:47:13,240 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2024-11-22 21:47:13,240 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:47:13,321 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-22 21:47:13,359 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 76 places, 75 transitions, 171 flow [2024-11-22 21:47:13,408 INFO L124 PetriNetUnfolderBase]: 9/72 cut-off events. [2024-11-22 21:47:13,409 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 21:47:13,414 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 72 events. 9/72 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 9. Compared 194 event pairs, 0 based on Foata normal form. 0/39 useless extension candidates. Maximal degree in co-relation 54. Up to 2 conditions per place. [2024-11-22 21:47:13,415 INFO L82 GeneralOperation]: Start removeDead. Operand has 76 places, 75 transitions, 171 flow [2024-11-22 21:47:13,419 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 71 transitions, 160 flow [2024-11-22 21:47:13,433 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:47:13,441 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;@570f851d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:47:13,442 INFO L334 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2024-11-22 21:47:13,448 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:47:13,448 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:47:13,449 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:47:13,449 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:13,450 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:47:13,450 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-22 21:47:13,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:13,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1034912, now seen corresponding path program 1 times [2024-11-22 21:47:13,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:13,464 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1761251216] [2024-11-22 21:47:13,464 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:13,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:13,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:13,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:13,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1761251216] [2024-11-22 21:47:13,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1761251216] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:13,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:13,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:47:13,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782905320] [2024-11-22 21:47:13,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:13,773 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:47:13,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:13,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:47:13,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:47:13,830 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-22 21:47:13,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 160 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:13,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:13,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-22 21:47:13,835 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:15,820 INFO L124 PetriNetUnfolderBase]: 11258/15925 cut-off events. [2024-11-22 21:47:15,821 INFO L125 PetriNetUnfolderBase]: For 553/553 co-relation queries the response was YES. [2024-11-22 21:47:15,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32375 conditions, 15925 events. 11258/15925 cut-off events. For 553/553 co-relation queries the response was YES. Maximal size of possible extension queue 759. Compared 90309 event pairs, 10184 based on Foata normal form. 1/9499 useless extension candidates. Maximal degree in co-relation 31435. Up to 15894 conditions per place. [2024-11-22 21:47:15,952 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 54 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2024-11-22 21:47:15,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 63 transitions, 256 flow [2024-11-22 21:47:15,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:47:15,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:47:15,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 96 transitions. [2024-11-22 21:47:15,965 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4266666666666667 [2024-11-22 21:47:15,966 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 160 flow. Second operand 3 states and 96 transitions. [2024-11-22 21:47:15,967 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 63 transitions, 256 flow [2024-11-22 21:47:15,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 244 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:47:15,981 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 136 flow [2024-11-22 21:47:15,984 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=136, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2024-11-22 21:47:15,988 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -9 predicate places. [2024-11-22 21:47:15,991 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 136 flow [2024-11-22 21:47:15,991 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:15,991 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:15,992 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:47:15,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:47:15,992 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-22 21:47:15,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:15,994 INFO L85 PathProgramCache]: Analyzing trace with hash 1034913, now seen corresponding path program 1 times [2024-11-22 21:47:15,994 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:15,994 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [194105322] [2024-11-22 21:47:15,994 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:15,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:16,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:16,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:16,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:16,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [194105322] [2024-11-22 21:47:16,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [194105322] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:16,299 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:16,299 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:47:16,300 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755521880] [2024-11-22 21:47:16,300 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:16,301 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:47:16,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:16,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:47:16,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:47:16,316 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-22 21:47:16,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 136 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:16,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:16,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-22 21:47:16,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:17,831 INFO L124 PetriNetUnfolderBase]: 11261/15934 cut-off events. [2024-11-22 21:47:17,832 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2024-11-22 21:47:17,855 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32059 conditions, 15934 events. 11261/15934 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 90442 event pairs, 10184 based on Foata normal form. 0/9503 useless extension candidates. Maximal degree in co-relation 32009. Up to 15907 conditions per place. [2024-11-22 21:47:17,913 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 58 selfloop transitions, 10 changer transitions 0/72 dead transitions. [2024-11-22 21:47:17,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 72 transitions, 292 flow [2024-11-22 21:47:17,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:47:17,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:47:17,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2024-11-22 21:47:17,915 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2024-11-22 21:47:17,915 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 136 flow. Second operand 4 states and 115 transitions. [2024-11-22 21:47:17,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 72 transitions, 292 flow [2024-11-22 21:47:17,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 72 transitions, 286 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:47:17,918 INFO L231 Difference]: Finished difference. Result has 67 places, 72 transitions, 214 flow [2024-11-22 21:47:17,918 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=214, PETRI_PLACES=67, PETRI_TRANSITIONS=72} [2024-11-22 21:47:17,919 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -5 predicate places. [2024-11-22 21:47:17,919 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 72 transitions, 214 flow [2024-11-22 21:47:17,919 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:17,919 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:17,920 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:47:17,920 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:47:17,920 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-22 21:47:17,921 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:17,921 INFO L85 PathProgramCache]: Analyzing trace with hash 994583983, now seen corresponding path program 1 times [2024-11-22 21:47:17,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:17,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955362893] [2024-11-22 21:47:17,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:17,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:17,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:18,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:18,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955362893] [2024-11-22 21:47:18,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955362893] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:18,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476240702] [2024-11-22 21:47:18,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:18,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:18,295 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:18,298 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) [2024-11-22 21:47:18,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:47:18,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:18,389 INFO L255 TraceCheckSpWp]: Trace formula consists of 91 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-22 21:47:18,394 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:18,481 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 [2024-11-22 21:47:18,698 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:18,698 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:47:18,810 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:18,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476240702] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:47:18,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:47:18,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:47:18,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154985790] [2024-11-22 21:47:18,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:47:18,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:47:18,813 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:18,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:47:18,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:47:18,895 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-22 21:47:18,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 72 transitions, 214 flow. Second operand has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:18,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:18,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-22 21:47:18,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:20,817 INFO L124 PetriNetUnfolderBase]: 11264/15940 cut-off events. [2024-11-22 21:47:20,818 INFO L125 PetriNetUnfolderBase]: For 117/117 co-relation queries the response was YES. [2024-11-22 21:47:20,835 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32110 conditions, 15940 events. 11264/15940 cut-off events. For 117/117 co-relation queries the response was YES. Maximal size of possible extension queue 760. Compared 90556 event pairs, 10184 based on Foata normal form. 0/9514 useless extension candidates. Maximal degree in co-relation 32023. Up to 15896 conditions per place. [2024-11-22 21:47:20,889 INFO L140 encePairwiseOnDemand]: 62/75 looper letters, 48 selfloop transitions, 26 changer transitions 0/78 dead transitions. [2024-11-22 21:47:20,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 78 transitions, 390 flow [2024-11-22 21:47:20,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:47:20,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:47:20,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 168 transitions. [2024-11-22 21:47:20,894 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.28 [2024-11-22 21:47:20,895 INFO L175 Difference]: Start difference. First operand has 67 places, 72 transitions, 214 flow. Second operand 8 states and 168 transitions. [2024-11-22 21:47:20,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 78 transitions, 390 flow [2024-11-22 21:47:20,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 78 transitions, 390 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-11-22 21:47:20,898 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 294 flow [2024-11-22 21:47:20,898 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=294, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2024-11-22 21:47:20,899 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2024-11-22 21:47:20,900 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 294 flow [2024-11-22 21:47:20,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 12.363636363636363) internal successors, (136), 11 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:20,901 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:20,901 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:20,910 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:47:21,105 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 [2024-11-22 21:47:21,106 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-22 21:47:21,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:21,107 INFO L85 PathProgramCache]: Analyzing trace with hash -1537323912, now seen corresponding path program 1 times [2024-11-22 21:47:21,107 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:21,107 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204950867] [2024-11-22 21:47:21,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:21,107 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:21,120 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:21,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:21,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:21,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204950867] [2024-11-22 21:47:21,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1204950867] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:21,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:21,162 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:47:21,162 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1154154558] [2024-11-22 21:47:21,162 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:21,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:47:21,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:21,163 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:47:21,163 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:47:21,163 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-22 21:47:21,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 294 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) [2024-11-22 21:47:21,164 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:21,164 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-22 21:47:21,164 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:22,406 INFO L124 PetriNetUnfolderBase]: 13086/18562 cut-off events. [2024-11-22 21:47:22,406 INFO L125 PetriNetUnfolderBase]: For 195/195 co-relation queries the response was YES. [2024-11-22 21:47:22,431 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37407 conditions, 18562 events. 13086/18562 cut-off events. For 195/195 co-relation queries the response was YES. Maximal size of possible extension queue 789. Compared 107601 event pairs, 4436 based on Foata normal form. 162/11415 useless extension candidates. Maximal degree in co-relation 37295. Up to 15883 conditions per place. [2024-11-22 21:47:22,500 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 99 selfloop transitions, 3 changer transitions 0/106 dead transitions. [2024-11-22 21:47:22,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 106 transitions, 558 flow [2024-11-22 21:47:22,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:47:22,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:47:22,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 129 transitions. [2024-11-22 21:47:22,502 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5733333333333334 [2024-11-22 21:47:22,503 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 294 flow. Second operand 3 states and 129 transitions. [2024-11-22 21:47:22,503 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 106 transitions, 558 flow [2024-11-22 21:47:22,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 106 transitions, 487 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-11-22 21:47:22,506 INFO L231 Difference]: Finished difference. Result has 68 places, 80 transitions, 246 flow [2024-11-22 21:47:22,506 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=246, PETRI_PLACES=68, PETRI_TRANSITIONS=80} [2024-11-22 21:47:22,507 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -4 predicate places. [2024-11-22 21:47:22,507 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 80 transitions, 246 flow [2024-11-22 21:47:22,508 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) [2024-11-22 21:47:22,508 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:22,508 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:22,508 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 21:47:22,508 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-22 21:47:22,508 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:22,509 INFO L85 PathProgramCache]: Analyzing trace with hash -117045361, now seen corresponding path program 1 times [2024-11-22 21:47:22,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:22,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366582036] [2024-11-22 21:47:22,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:22,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:22,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:22,566 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:22,567 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:22,567 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366582036] [2024-11-22 21:47:22,567 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366582036] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:22,567 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:22,567 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:47:22,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006739344] [2024-11-22 21:47:22,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:22,568 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:47:22,568 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:22,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:47:22,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:47:22,569 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-22 21:47:22,569 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 80 transitions, 246 flow. Second operand has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:22,570 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:22,570 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-22 21:47:22,570 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:24,015 INFO L124 PetriNetUnfolderBase]: 12333/17526 cut-off events. [2024-11-22 21:47:24,015 INFO L125 PetriNetUnfolderBase]: For 627/627 co-relation queries the response was YES. [2024-11-22 21:47:24,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36974 conditions, 17526 events. 12333/17526 cut-off events. For 627/627 co-relation queries the response was YES. Maximal size of possible extension queue 560. Compared 95948 event pairs, 4948 based on Foata normal form. 297/11634 useless extension candidates. Maximal degree in co-relation 11791. Up to 12773 conditions per place. [2024-11-22 21:47:24,126 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 102 selfloop transitions, 2 changer transitions 0/108 dead transitions. [2024-11-22 21:47:24,127 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 108 transitions, 518 flow [2024-11-22 21:47:24,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:47:24,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:47:24,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 130 transitions. [2024-11-22 21:47:24,129 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5777777777777777 [2024-11-22 21:47:24,129 INFO L175 Difference]: Start difference. First operand has 68 places, 80 transitions, 246 flow. Second operand 3 states and 130 transitions. [2024-11-22 21:47:24,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 108 transitions, 518 flow [2024-11-22 21:47:24,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 108 transitions, 516 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:47:24,135 INFO L231 Difference]: Finished difference. Result has 70 places, 80 transitions, 255 flow [2024-11-22 21:47:24,136 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=255, PETRI_PLACES=70, PETRI_TRANSITIONS=80} [2024-11-22 21:47:24,136 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -2 predicate places. [2024-11-22 21:47:24,137 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 80 transitions, 255 flow [2024-11-22 21:47:24,137 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.333333333333332) internal successors, (52), 3 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:24,137 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:24,137 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:24,137 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 21:47:24,138 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-22 21:47:24,138 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:24,138 INFO L85 PathProgramCache]: Analyzing trace with hash 1075232416, now seen corresponding path program 1 times [2024-11-22 21:47:24,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:24,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742990142] [2024-11-22 21:47:24,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:24,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:24,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:24,248 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:24,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:24,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742990142] [2024-11-22 21:47:24,249 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [742990142] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:24,249 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:24,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:47:24,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254800374] [2024-11-22 21:47:24,250 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:24,250 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:47:24,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:24,251 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:47:24,251 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:47:24,266 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-22 21:47:24,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 80 transitions, 255 flow. Second operand has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:24,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:24,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-22 21:47:24,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:25,543 INFO L124 PetriNetUnfolderBase]: 12946/18508 cut-off events. [2024-11-22 21:47:25,543 INFO L125 PetriNetUnfolderBase]: For 1053/1053 co-relation queries the response was YES. [2024-11-22 21:47:25,558 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40328 conditions, 18508 events. 12946/18508 cut-off events. For 1053/1053 co-relation queries the response was YES. Maximal size of possible extension queue 594. Compared 102937 event pairs, 11912 based on Foata normal form. 112/12564 useless extension candidates. Maximal degree in co-relation 12447. Up to 17508 conditions per place. [2024-11-22 21:47:25,608 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 105 selfloop transitions, 8 changer transitions 3/120 dead transitions. [2024-11-22 21:47:25,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 120 transitions, 611 flow [2024-11-22 21:47:25,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:47:25,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:47:25,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 166 transitions. [2024-11-22 21:47:25,610 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44266666666666665 [2024-11-22 21:47:25,610 INFO L175 Difference]: Start difference. First operand has 70 places, 80 transitions, 255 flow. Second operand 5 states and 166 transitions. [2024-11-22 21:47:25,610 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 120 transitions, 611 flow [2024-11-22 21:47:25,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 120 transitions, 609 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:47:25,613 INFO L231 Difference]: Finished difference. Result has 75 places, 85 transitions, 320 flow [2024-11-22 21:47:25,613 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=253, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=75, PETRI_TRANSITIONS=85} [2024-11-22 21:47:25,614 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2024-11-22 21:47:25,614 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 85 transitions, 320 flow [2024-11-22 21:47:25,614 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.0) internal successors, (68), 4 states have internal predecessors, (68), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:25,614 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:25,614 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:25,614 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-22 21:47:25,615 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-22 21:47:25,615 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:25,615 INFO L85 PathProgramCache]: Analyzing trace with hash 1163599918, now seen corresponding path program 1 times [2024-11-22 21:47:25,615 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:25,615 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215592087] [2024-11-22 21:47:25,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:25,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:25,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:25,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:25,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:25,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215592087] [2024-11-22 21:47:25,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1215592087] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:25,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:25,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:47:25,770 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055959872] [2024-11-22 21:47:25,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:25,771 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:47:25,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:25,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:47:25,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:47:25,790 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-22 21:47:25,791 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 85 transitions, 320 flow. Second operand has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:25,791 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:25,791 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-22 21:47:25,791 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:26,561 INFO L124 PetriNetUnfolderBase]: 9843/14132 cut-off events. [2024-11-22 21:47:26,561 INFO L125 PetriNetUnfolderBase]: For 1251/1251 co-relation queries the response was YES. [2024-11-22 21:47:26,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31166 conditions, 14132 events. 9843/14132 cut-off events. For 1251/1251 co-relation queries the response was YES. Maximal size of possible extension queue 446. Compared 76943 event pairs, 9001 based on Foata normal form. 0/10250 useless extension candidates. Maximal degree in co-relation 29133. Up to 14062 conditions per place. [2024-11-22 21:47:26,623 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 69 selfloop transitions, 8 changer transitions 0/81 dead transitions. [2024-11-22 21:47:26,623 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 81 transitions, 462 flow [2024-11-22 21:47:26,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:47:26,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:47:26,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 111 transitions. [2024-11-22 21:47:26,624 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.296 [2024-11-22 21:47:26,624 INFO L175 Difference]: Start difference. First operand has 75 places, 85 transitions, 320 flow. Second operand 5 states and 111 transitions. [2024-11-22 21:47:26,624 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 81 transitions, 462 flow [2024-11-22 21:47:26,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 81 transitions, 458 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-11-22 21:47:26,629 INFO L231 Difference]: Finished difference. Result has 74 places, 81 transitions, 320 flow [2024-11-22 21:47:26,630 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=304, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=320, PETRI_PLACES=74, PETRI_TRANSITIONS=81} [2024-11-22 21:47:26,630 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2024-11-22 21:47:26,631 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 81 transitions, 320 flow [2024-11-22 21:47:26,631 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 14.5) internal successors, (58), 4 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:26,631 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:26,631 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:26,631 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-22 21:47:26,631 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-22 21:47:26,632 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:26,632 INFO L85 PathProgramCache]: Analyzing trace with hash 1163599919, now seen corresponding path program 1 times [2024-11-22 21:47:26,632 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:26,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594365933] [2024-11-22 21:47:26,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:26,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:26,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:27,035 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:27,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:27,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594365933] [2024-11-22 21:47:27,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [594365933] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:27,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559653616] [2024-11-22 21:47:27,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:27,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:27,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:27,039 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) [2024-11-22 21:47:27,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:47:27,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:27,136 INFO L255 TraceCheckSpWp]: Trace formula consists of 218 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-22 21:47:27,138 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:27,149 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 6 treesize of output 5 [2024-11-22 21:47:27,212 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:47:27,214 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-22 21:47:27,241 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-22 21:47:27,241 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-22 21:47:27,278 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:47:27,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-22 21:47:27,287 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:47:27,287 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 11 treesize of output 11 [2024-11-22 21:47:27,343 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:27,344 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:47:27,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1559653616] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:27,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:47:27,345 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-11-22 21:47:27,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [750298131] [2024-11-22 21:47:27,347 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:27,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:47:27,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:27,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:47:27,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:47:27,380 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-22 21:47:27,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 81 transitions, 320 flow. Second operand has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 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) [2024-11-22 21:47:27,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:27,381 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-22 21:47:27,381 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:28,046 INFO L124 PetriNetUnfolderBase]: 7310/10556 cut-off events. [2024-11-22 21:47:28,046 INFO L125 PetriNetUnfolderBase]: For 994/994 co-relation queries the response was YES. [2024-11-22 21:47:28,055 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22898 conditions, 10556 events. 7310/10556 cut-off events. For 994/994 co-relation queries the response was YES. Maximal size of possible extension queue 328. Compared 55314 event pairs, 6640 based on Foata normal form. 568/8326 useless extension candidates. Maximal degree in co-relation 20779. Up to 10519 conditions per place. [2024-11-22 21:47:28,079 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 69 selfloop transitions, 4 changer transitions 0/77 dead transitions. [2024-11-22 21:47:28,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 77 transitions, 454 flow [2024-11-22 21:47:28,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:47:28,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:47:28,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-22 21:47:28,081 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.32 [2024-11-22 21:47:28,081 INFO L175 Difference]: Start difference. First operand has 74 places, 81 transitions, 320 flow. Second operand 4 states and 96 transitions. [2024-11-22 21:47:28,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 77 transitions, 454 flow [2024-11-22 21:47:28,083 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 77 transitions, 442 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:47:28,084 INFO L231 Difference]: Finished difference. Result has 70 places, 77 transitions, 304 flow [2024-11-22 21:47:28,084 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=296, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=304, PETRI_PLACES=70, PETRI_TRANSITIONS=77} [2024-11-22 21:47:28,085 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -2 predicate places. [2024-11-22 21:47:28,085 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 77 transitions, 304 flow [2024-11-22 21:47:28,085 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.333333333333334) internal successors, (80), 6 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) [2024-11-22 21:47:28,085 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:28,085 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:28,095 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 21:47:28,289 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,SelfDestructingSolverStorable7 [2024-11-22 21:47:28,290 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-22 21:47:28,290 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:28,290 INFO L85 PathProgramCache]: Analyzing trace with hash 1711860245, now seen corresponding path program 1 times [2024-11-22 21:47:28,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:28,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760866222] [2024-11-22 21:47:28,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:28,291 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:28,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:28,355 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:47:28,355 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:28,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760866222] [2024-11-22 21:47:28,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760866222] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:28,356 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:28,356 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:47:28,356 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751071804] [2024-11-22 21:47:28,356 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:28,358 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:47:28,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:28,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:47:28,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:47:28,360 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-22 21:47:28,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 304 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:28,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:28,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-22 21:47:28,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:28,832 INFO L124 PetriNetUnfolderBase]: 5974/8687 cut-off events. [2024-11-22 21:47:28,832 INFO L125 PetriNetUnfolderBase]: For 775/775 co-relation queries the response was YES. [2024-11-22 21:47:28,842 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18967 conditions, 8687 events. 5974/8687 cut-off events. For 775/775 co-relation queries the response was YES. Maximal size of possible extension queue 316. Compared 43405 event pairs, 2918 based on Foata normal form. 158/6500 useless extension candidates. Maximal degree in co-relation 16909. Up to 6301 conditions per place. [2024-11-22 21:47:28,859 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 99 selfloop transitions, 2 changer transitions 0/105 dead transitions. [2024-11-22 21:47:28,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 105 transitions, 575 flow [2024-11-22 21:47:28,859 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:47:28,859 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:47:28,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 123 transitions. [2024-11-22 21:47:28,860 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2024-11-22 21:47:28,860 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 304 flow. Second operand 3 states and 123 transitions. [2024-11-22 21:47:28,860 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 105 transitions, 575 flow [2024-11-22 21:47:28,862 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 105 transitions, 570 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:47:28,863 INFO L231 Difference]: Finished difference. Result has 71 places, 78 transitions, 315 flow [2024-11-22 21:47:28,863 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=299, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=315, PETRI_PLACES=71, PETRI_TRANSITIONS=78} [2024-11-22 21:47:28,864 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2024-11-22 21:47:28,864 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 78 transitions, 315 flow [2024-11-22 21:47:28,864 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:28,864 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:28,864 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] [2024-11-22 21:47:28,864 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-22 21:47:28,864 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-22 21:47:28,865 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:28,865 INFO L85 PathProgramCache]: Analyzing trace with hash -1213487871, now seen corresponding path program 1 times [2024-11-22 21:47:28,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:28,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1497340842] [2024-11-22 21:47:28,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:28,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:28,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:28,958 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:47:28,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:28,958 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1497340842] [2024-11-22 21:47:28,958 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1497340842] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:28,958 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:28,958 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:47:28,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [870018812] [2024-11-22 21:47:28,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:28,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:47:28,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:28,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:47:28,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:47:28,967 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-22 21:47:28,967 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 78 transitions, 315 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:28,968 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:28,968 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-22 21:47:28,968 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:29,530 INFO L124 PetriNetUnfolderBase]: 7316/10809 cut-off events. [2024-11-22 21:47:29,530 INFO L125 PetriNetUnfolderBase]: For 1109/1109 co-relation queries the response was YES. [2024-11-22 21:47:29,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24226 conditions, 10809 events. 7316/10809 cut-off events. For 1109/1109 co-relation queries the response was YES. Maximal size of possible extension queue 320. Compared 57988 event pairs, 6726 based on Foata normal form. 20/8255 useless extension candidates. Maximal degree in co-relation 20222. Up to 8627 conditions per place. [2024-11-22 21:47:29,565 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 83 selfloop transitions, 10 changer transitions 5/102 dead transitions. [2024-11-22 21:47:29,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 102 transitions, 571 flow [2024-11-22 21:47:29,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:47:29,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:47:29,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 134 transitions. [2024-11-22 21:47:29,567 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44666666666666666 [2024-11-22 21:47:29,567 INFO L175 Difference]: Start difference. First operand has 71 places, 78 transitions, 315 flow. Second operand 4 states and 134 transitions. [2024-11-22 21:47:29,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 102 transitions, 571 flow [2024-11-22 21:47:29,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 102 transitions, 569 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:47:29,570 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 347 flow [2024-11-22 21:47:29,570 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=313, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=347, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-11-22 21:47:29,571 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2024-11-22 21:47:29,571 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 347 flow [2024-11-22 21:47:29,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:29,571 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:29,571 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:29,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-22 21:47:29,572 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-22 21:47:29,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:29,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1567978212, now seen corresponding path program 1 times [2024-11-22 21:47:29,572 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:29,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184746798] [2024-11-22 21:47:29,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:29,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:29,811 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:47:29,811 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:29,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184746798] [2024-11-22 21:47:29,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184746798] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:29,811 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:29,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:47:29,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005832011] [2024-11-22 21:47:29,812 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:29,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:47:29,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:29,813 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:47:29,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:47:29,835 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-22 21:47:29,836 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 347 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:29,836 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:29,836 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-22 21:47:29,836 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:30,317 INFO L124 PetriNetUnfolderBase]: 6475/9622 cut-off events. [2024-11-22 21:47:30,317 INFO L125 PetriNetUnfolderBase]: For 1135/1135 co-relation queries the response was YES. [2024-11-22 21:47:30,329 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21530 conditions, 9622 events. 6475/9622 cut-off events. For 1135/1135 co-relation queries the response was YES. Maximal size of possible extension queue 254. Compared 51380 event pairs, 5958 based on Foata normal form. 0/7577 useless extension candidates. Maximal degree in co-relation 17516. Up to 9525 conditions per place. [2024-11-22 21:47:30,345 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 63 selfloop transitions, 9 changer transitions 0/76 dead transitions. [2024-11-22 21:47:30,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 76 transitions, 483 flow [2024-11-22 21:47:30,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:47:30,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:47:30,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 104 transitions. [2024-11-22 21:47:30,347 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3466666666666667 [2024-11-22 21:47:30,347 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 347 flow. Second operand 4 states and 104 transitions. [2024-11-22 21:47:30,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 76 transitions, 483 flow [2024-11-22 21:47:30,349 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 76 transitions, 472 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:47:30,350 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 346 flow [2024-11-22 21:47:30,351 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=346, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2024-11-22 21:47:30,351 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2024-11-22 21:47:30,351 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 346 flow [2024-11-22 21:47:30,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:30,352 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:30,352 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:30,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-22 21:47:30,352 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-22 21:47:30,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:30,353 INFO L85 PathProgramCache]: Analyzing trace with hash 1567978211, now seen corresponding path program 1 times [2024-11-22 21:47:30,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:30,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1495152256] [2024-11-22 21:47:30,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:30,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:30,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:30,416 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:47:30,417 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:30,417 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1495152256] [2024-11-22 21:47:30,417 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1495152256] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:30,417 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:30,417 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:47:30,418 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [65338862] [2024-11-22 21:47:30,418 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:30,418 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:47:30,418 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:30,418 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:47:30,419 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:47:30,433 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-22 21:47:30,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 346 flow. Second operand has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:30,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:30,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-22 21:47:30,434 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:30,852 INFO L124 PetriNetUnfolderBase]: 5714/8547 cut-off events. [2024-11-22 21:47:30,852 INFO L125 PetriNetUnfolderBase]: For 1015/1015 co-relation queries the response was YES. [2024-11-22 21:47:30,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18827 conditions, 8547 events. 5714/8547 cut-off events. For 1015/1015 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 45420 event pairs, 5266 based on Foata normal form. 122/6983 useless extension candidates. Maximal degree in co-relation 14810. Up to 8450 conditions per place. [2024-11-22 21:47:30,880 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 65 selfloop transitions, 5 changer transitions 0/74 dead transitions. [2024-11-22 21:47:30,880 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 74 transitions, 478 flow [2024-11-22 21:47:30,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:47:30,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:47:30,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 90 transitions. [2024-11-22 21:47:30,881 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3 [2024-11-22 21:47:30,881 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 346 flow. Second operand 4 states and 90 transitions. [2024-11-22 21:47:30,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 74 transitions, 478 flow [2024-11-22 21:47:30,883 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 464 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:47:30,884 INFO L231 Difference]: Finished difference. Result has 72 places, 74 transitions, 334 flow [2024-11-22 21:47:30,884 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=324, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=334, PETRI_PLACES=72, PETRI_TRANSITIONS=74} [2024-11-22 21:47:30,884 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 0 predicate places. [2024-11-22 21:47:30,885 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 74 transitions, 334 flow [2024-11-22 21:47:30,885 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.0) internal successors, (64), 4 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:30,885 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:30,885 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:30,885 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-22 21:47:30,885 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-22 21:47:30,886 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:30,886 INFO L85 PathProgramCache]: Analyzing trace with hash -706424026, now seen corresponding path program 1 times [2024-11-22 21:47:30,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:30,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056876006] [2024-11-22 21:47:30,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:30,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:30,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:30,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:47:30,991 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:30,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056876006] [2024-11-22 21:47:30,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056876006] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:30,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:30,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:47:30,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891812732] [2024-11-22 21:47:30,992 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:30,992 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:47:30,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:30,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:47:30,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:47:31,002 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-22 21:47:31,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 74 transitions, 334 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:31,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:31,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-22 21:47:31,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:31,564 INFO L124 PetriNetUnfolderBase]: 8442/12875 cut-off events. [2024-11-22 21:47:31,564 INFO L125 PetriNetUnfolderBase]: For 1155/1155 co-relation queries the response was YES. [2024-11-22 21:47:31,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27860 conditions, 12875 events. 8442/12875 cut-off events. For 1155/1155 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 76663 event pairs, 7988 based on Foata normal form. 28/10435 useless extension candidates. Maximal degree in co-relation 19915. Up to 8477 conditions per place. [2024-11-22 21:47:31,604 INFO L140 encePairwiseOnDemand]: 68/75 looper letters, 93 selfloop transitions, 7 changer transitions 9/113 dead transitions. [2024-11-22 21:47:31,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 113 transitions, 706 flow [2024-11-22 21:47:31,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:47:31,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:47:31,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 137 transitions. [2024-11-22 21:47:31,605 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.45666666666666667 [2024-11-22 21:47:31,606 INFO L175 Difference]: Start difference. First operand has 72 places, 74 transitions, 334 flow. Second operand 4 states and 137 transitions. [2024-11-22 21:47:31,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 113 transitions, 706 flow [2024-11-22 21:47:31,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 113 transitions, 696 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:47:31,610 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 353 flow [2024-11-22 21:47:31,610 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=328, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=353, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2024-11-22 21:47:31,610 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 2 predicate places. [2024-11-22 21:47:31,611 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 353 flow [2024-11-22 21:47:31,611 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:31,611 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:31,611 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:31,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-22 21:47:31,611 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-22 21:47:31,612 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:31,612 INFO L85 PathProgramCache]: Analyzing trace with hash -1783579436, now seen corresponding path program 1 times [2024-11-22 21:47:31,612 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:31,612 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959318963] [2024-11-22 21:47:31,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:31,612 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:31,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:31,695 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 21:47:31,695 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:31,695 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959318963] [2024-11-22 21:47:31,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959318963] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:31,695 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:31,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:47:31,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494259765] [2024-11-22 21:47:31,696 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:31,696 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:47:31,696 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:31,697 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:47:31,697 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:47:31,697 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-22 21:47:31,697 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 353 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) [2024-11-22 21:47:31,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:31,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-22 21:47:31,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:32,689 INFO L124 PetriNetUnfolderBase]: 12994/19429 cut-off events. [2024-11-22 21:47:32,690 INFO L125 PetriNetUnfolderBase]: For 2847/2847 co-relation queries the response was YES. [2024-11-22 21:47:32,726 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43767 conditions, 19429 events. 12994/19429 cut-off events. For 2847/2847 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 110168 event pairs, 8638 based on Foata normal form. 216/15690 useless extension candidates. Maximal degree in co-relation 35813. Up to 11159 conditions per place. [2024-11-22 21:47:32,762 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 120 selfloop transitions, 8 changer transitions 0/132 dead transitions. [2024-11-22 21:47:32,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 132 transitions, 781 flow [2024-11-22 21:47:32,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:47:32,763 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:47:32,763 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 158 transitions. [2024-11-22 21:47:32,764 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5266666666666666 [2024-11-22 21:47:32,764 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 353 flow. Second operand 4 states and 158 transitions. [2024-11-22 21:47:32,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 132 transitions, 781 flow [2024-11-22 21:47:32,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 132 transitions, 757 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-22 21:47:32,769 INFO L231 Difference]: Finished difference. Result has 76 places, 80 transitions, 392 flow [2024-11-22 21:47:32,769 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=329, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=392, PETRI_PLACES=76, PETRI_TRANSITIONS=80} [2024-11-22 21:47:32,770 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 4 predicate places. [2024-11-22 21:47:32,770 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 80 transitions, 392 flow [2024-11-22 21:47:32,770 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) [2024-11-22 21:47:32,770 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:32,770 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:32,770 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-22 21:47:32,771 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-22 21:47:32,771 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:32,771 INFO L85 PathProgramCache]: Analyzing trace with hash 593677860, now seen corresponding path program 1 times [2024-11-22 21:47:32,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:32,771 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [67526634] [2024-11-22 21:47:32,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:32,771 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:32,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:32,849 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:32,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:32,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [67526634] [2024-11-22 21:47:32,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [67526634] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:32,850 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:32,850 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:47:32,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735943286] [2024-11-22 21:47:32,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:32,851 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:47:32,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:32,852 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:47:32,852 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:47:32,852 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-22 21:47:32,853 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 80 transitions, 392 flow. Second operand has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:32,853 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:32,853 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-22 21:47:32,853 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:33,967 INFO L124 PetriNetUnfolderBase]: 12994/19413 cut-off events. [2024-11-22 21:47:33,967 INFO L125 PetriNetUnfolderBase]: For 6772/6772 co-relation queries the response was YES. [2024-11-22 21:47:33,995 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46659 conditions, 19413 events. 12994/19413 cut-off events. For 6772/6772 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 109847 event pairs, 10339 based on Foata normal form. 8/15464 useless extension candidates. Maximal degree in co-relation 38723. Up to 10967 conditions per place. [2024-11-22 21:47:34,022 INFO L140 encePairwiseOnDemand]: 72/75 looper letters, 74 selfloop transitions, 2 changer transitions 17/97 dead transitions. [2024-11-22 21:47:34,022 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 97 transitions, 621 flow [2024-11-22 21:47:34,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:47:34,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:47:34,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 105 transitions. [2024-11-22 21:47:34,023 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-22 21:47:34,023 INFO L175 Difference]: Start difference. First operand has 76 places, 80 transitions, 392 flow. Second operand 3 states and 105 transitions. [2024-11-22 21:47:34,023 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 97 transitions, 621 flow [2024-11-22 21:47:34,029 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 97 transitions, 613 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-22 21:47:34,031 INFO L231 Difference]: Finished difference. Result has 79 places, 73 transitions, 328 flow [2024-11-22 21:47:34,031 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=328, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2024-11-22 21:47:34,031 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 7 predicate places. [2024-11-22 21:47:34,032 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 328 flow [2024-11-22 21:47:34,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.666666666666668) internal successors, (65), 3 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:34,032 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:34,032 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:34,032 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-22 21:47:34,032 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-22 21:47:34,033 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:34,033 INFO L85 PathProgramCache]: Analyzing trace with hash -1515257772, now seen corresponding path program 1 times [2024-11-22 21:47:34,033 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:34,033 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066936592] [2024-11-22 21:47:34,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:34,033 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:34,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:34,229 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:47:34,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:34,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066936592] [2024-11-22 21:47:34,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066936592] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:34,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363397457] [2024-11-22 21:47:34,232 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:34,232 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:34,232 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:34,234 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) [2024-11-22 21:47:34,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:47:34,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:34,350 INFO L255 TraceCheckSpWp]: Trace formula consists of 301 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:47:34,352 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:34,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:47:34,441 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:47:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:47:34,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [363397457] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:47:34,549 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:47:34,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 13 [2024-11-22 21:47:34,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [967743788] [2024-11-22 21:47:34,549 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:47:34,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:47:34,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:34,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:47:34,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:47:34,596 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-22 21:47:34,597 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 328 flow. Second operand has 14 states, 14 states have (on average 18.5) internal successors, (259), 14 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:34,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:34,597 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-22 21:47:34,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:35,696 INFO L124 PetriNetUnfolderBase]: 9029/13114 cut-off events. [2024-11-22 21:47:35,696 INFO L125 PetriNetUnfolderBase]: For 5657/5657 co-relation queries the response was YES. [2024-11-22 21:47:35,730 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33021 conditions, 13114 events. 9029/13114 cut-off events. For 5657/5657 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 65728 event pairs, 7859 based on Foata normal form. 2/10401 useless extension candidates. Maximal degree in co-relation 30240. Up to 11889 conditions per place. [2024-11-22 21:47:35,760 INFO L140 encePairwiseOnDemand]: 63/75 looper letters, 51 selfloop transitions, 17 changer transitions 58/130 dead transitions. [2024-11-22 21:47:35,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 130 transitions, 773 flow [2024-11-22 21:47:35,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:47:35,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:47:35,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 225 transitions. [2024-11-22 21:47:35,762 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-11-22 21:47:35,762 INFO L175 Difference]: Start difference. First operand has 79 places, 73 transitions, 328 flow. Second operand 9 states and 225 transitions. [2024-11-22 21:47:35,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 130 transitions, 773 flow [2024-11-22 21:47:35,777 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 130 transitions, 732 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-11-22 21:47:35,778 INFO L231 Difference]: Finished difference. Result has 83 places, 72 transitions, 340 flow [2024-11-22 21:47:35,778 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=340, PETRI_PLACES=83, PETRI_TRANSITIONS=72} [2024-11-22 21:47:35,779 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 11 predicate places. [2024-11-22 21:47:35,779 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 72 transitions, 340 flow [2024-11-22 21:47:35,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 18.5) internal successors, (259), 14 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:35,780 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:35,780 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:35,789 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 21:47:35,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:35,981 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-22 21:47:35,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:35,981 INFO L85 PathProgramCache]: Analyzing trace with hash 92232290, now seen corresponding path program 2 times [2024-11-22 21:47:35,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:35,981 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610551751] [2024-11-22 21:47:35,982 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:47:35,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:36,021 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:47:36,021 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:36,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-22 21:47:36,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:36,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610551751] [2024-11-22 21:47:36,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610551751] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:36,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:36,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:47:36,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [945175315] [2024-11-22 21:47:36,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:36,161 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:47:36,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:36,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:47:36,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:47:36,182 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-22 21:47:36,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 72 transitions, 340 flow. Second operand has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:36,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:36,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-22 21:47:36,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:37,161 INFO L124 PetriNetUnfolderBase]: 6676/9647 cut-off events. [2024-11-22 21:47:37,161 INFO L125 PetriNetUnfolderBase]: For 4783/4783 co-relation queries the response was YES. [2024-11-22 21:47:37,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24108 conditions, 9647 events. 6676/9647 cut-off events. For 4783/4783 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 46215 event pairs, 5798 based on Foata normal form. 0/8070 useless extension candidates. Maximal degree in co-relation 24058. Up to 9609 conditions per place. [2024-11-22 21:47:37,224 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 61 selfloop transitions, 5 changer transitions 0/70 dead transitions. [2024-11-22 21:47:37,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 70 transitions, 466 flow [2024-11-22 21:47:37,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:47:37,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:47:37,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 99 transitions. [2024-11-22 21:47:37,226 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.264 [2024-11-22 21:47:37,226 INFO L175 Difference]: Start difference. First operand has 83 places, 72 transitions, 340 flow. Second operand 5 states and 99 transitions. [2024-11-22 21:47:37,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 70 transitions, 466 flow [2024-11-22 21:47:37,233 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 70 transitions, 424 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-11-22 21:47:37,234 INFO L231 Difference]: Finished difference. Result has 75 places, 70 transitions, 302 flow [2024-11-22 21:47:37,234 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=70, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=302, PETRI_PLACES=75, PETRI_TRANSITIONS=70} [2024-11-22 21:47:37,234 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 3 predicate places. [2024-11-22 21:47:37,234 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 70 transitions, 302 flow [2024-11-22 21:47:37,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.666666666666666) internal successors, (94), 6 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:37,235 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:37,235 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:37,235 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-11-22 21:47:37,235 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-22 21:47:37,235 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:37,236 INFO L85 PathProgramCache]: Analyzing trace with hash 92232291, now seen corresponding path program 1 times [2024-11-22 21:47:37,236 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:37,236 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186590666] [2024-11-22 21:47:37,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:37,236 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:37,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:47:37,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:37,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186590666] [2024-11-22 21:47:37,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186590666] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:47:37,756 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:47:37,756 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:47:37,756 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1362784176] [2024-11-22 21:47:37,756 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:47:37,757 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:47:37,757 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:37,757 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:47:37,758 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:47:37,784 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 75 [2024-11-22 21:47:37,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 70 transitions, 302 flow. Second operand has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:37,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:37,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 75 [2024-11-22 21:47:37,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:38,477 INFO L124 PetriNetUnfolderBase]: 5257/7631 cut-off events. [2024-11-22 21:47:38,477 INFO L125 PetriNetUnfolderBase]: For 3336/3336 co-relation queries the response was YES. [2024-11-22 21:47:38,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18868 conditions, 7631 events. 5257/7631 cut-off events. For 3336/3336 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 35738 event pairs, 4517 based on Foata normal form. 252/6821 useless extension candidates. Maximal degree in co-relation 18824. Up to 7601 conditions per place. [2024-11-22 21:47:38,507 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 61 selfloop transitions, 3 changer transitions 0/68 dead transitions. [2024-11-22 21:47:38,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 68 transitions, 424 flow [2024-11-22 21:47:38,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:47:38,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:47:38,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-11-22 21:47:38,508 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2866666666666667 [2024-11-22 21:47:38,508 INFO L175 Difference]: Start difference. First operand has 75 places, 70 transitions, 302 flow. Second operand 4 states and 86 transitions. [2024-11-22 21:47:38,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 68 transitions, 424 flow [2024-11-22 21:47:38,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 68 transitions, 416 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:47:38,512 INFO L231 Difference]: Finished difference. Result has 73 places, 68 transitions, 294 flow [2024-11-22 21:47:38,512 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=288, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=294, PETRI_PLACES=73, PETRI_TRANSITIONS=68} [2024-11-22 21:47:38,513 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2024-11-22 21:47:38,513 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 68 transitions, 294 flow [2024-11-22 21:47:38,513 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.6) internal successors, (83), 5 states have internal predecessors, (83), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:38,513 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:38,513 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:38,514 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-22 21:47:38,514 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-22 21:47:38,514 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:38,514 INFO L85 PathProgramCache]: Analyzing trace with hash -412755686, now seen corresponding path program 1 times [2024-11-22 21:47:38,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:38,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28349046] [2024-11-22 21:47:38,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:38,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:38,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:38,755 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 21:47:38,755 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:38,755 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28349046] [2024-11-22 21:47:38,756 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28349046] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:38,756 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990158042] [2024-11-22 21:47:38,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:47:38,756 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:38,756 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:38,759 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) [2024-11-22 21:47:38,761 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:47:38,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:47:38,895 INFO L255 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:47:38,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:38,978 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 21:47:38,978 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:47:39,088 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-22 21:47:39,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1990158042] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:47:39,089 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:47:39,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-22 21:47:39,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [709926225] [2024-11-22 21:47:39,089 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:47:39,089 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 21:47:39,090 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:47:39,090 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 21:47:39,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=89, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:47:39,124 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 75 [2024-11-22 21:47:39,124 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 68 transitions, 294 flow. Second operand has 12 states, 12 states have (on average 19.333333333333332) internal successors, (232), 12 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:39,124 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:47:39,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 75 [2024-11-22 21:47:39,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:47:40,161 INFO L124 PetriNetUnfolderBase]: 6490/9672 cut-off events. [2024-11-22 21:47:40,162 INFO L125 PetriNetUnfolderBase]: For 4222/4222 co-relation queries the response was YES. [2024-11-22 21:47:40,179 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23640 conditions, 9672 events. 6490/9672 cut-off events. For 4222/4222 co-relation queries the response was YES. Maximal size of possible extension queue 233. Compared 48722 event pairs, 5339 based on Foata normal form. 345/8647 useless extension candidates. Maximal degree in co-relation 23596. Up to 7600 conditions per place. [2024-11-22 21:47:40,197 INFO L140 encePairwiseOnDemand]: 64/75 looper letters, 47 selfloop transitions, 16 changer transitions 60/127 dead transitions. [2024-11-22 21:47:40,197 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 127 transitions, 765 flow [2024-11-22 21:47:40,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-22 21:47:40,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-22 21:47:40,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 267 transitions. [2024-11-22 21:47:40,199 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.2966666666666667 [2024-11-22 21:47:40,199 INFO L175 Difference]: Start difference. First operand has 73 places, 68 transitions, 294 flow. Second operand 12 states and 267 transitions. [2024-11-22 21:47:40,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 127 transitions, 765 flow [2024-11-22 21:47:40,202 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 127 transitions, 761 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:47:40,203 INFO L231 Difference]: Finished difference. Result has 84 places, 67 transitions, 322 flow [2024-11-22 21:47:40,203 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=290, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=322, PETRI_PLACES=84, PETRI_TRANSITIONS=67} [2024-11-22 21:47:40,203 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 12 predicate places. [2024-11-22 21:47:40,204 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 67 transitions, 322 flow [2024-11-22 21:47:40,204 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 19.333333333333332) internal successors, (232), 12 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:47:40,204 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:47:40,204 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:47:40,211 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 21:47:40,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:40,405 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-22 21:47:40,405 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:47:40,405 INFO L85 PathProgramCache]: Analyzing trace with hash -1750360020, now seen corresponding path program 2 times [2024-11-22 21:47:40,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:47:40,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631216745] [2024-11-22 21:47:40,406 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:47:40,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:47:40,552 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:47:40,552 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:44,177 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:47:44,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:47:44,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631216745] [2024-11-22 21:47:44,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631216745] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:47:44,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [136906752] [2024-11-22 21:47:44,178 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:47:44,178 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:47:44,178 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:47:44,180 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) [2024-11-22 21:47:44,182 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:47:44,308 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:47:44,308 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:47:44,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 73 conjuncts are in the unsatisfiable core [2024-11-22 21:47:44,318 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:47:44,582 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 [2024-11-22 21:47:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:47:45,912 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:47:48,752 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:47:48,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 443 treesize of output 509 [2024-11-22 21:47:48,846 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:47:48,846 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 5 select indices, 5 select index equivalence classes, 0 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 10 case distinctions, treesize of input 429 treesize of output 495