./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-min-max-dec.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-min-max-dec.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 47814a6c2066a31334f0b50a42e69cfeb567d5dd7f02dc6c703588c90e067366 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:47:59,239 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:47:59,295 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:47:59,300 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:47:59,302 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:47:59,332 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:47:59,340 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:47:59,341 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:47:59,341 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:47:59,344 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:47:59,345 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:47:59,345 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:47:59,346 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:47:59,346 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:47:59,347 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:47:59,347 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:47:59,347 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:47:59,347 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:47:59,347 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:47:59,348 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:47:59,348 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:47:59,348 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:47:59,348 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:47:59,348 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:47:59,349 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:47:59,349 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:47:59,349 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:47:59,349 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:47:59,349 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:47:59,349 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:47:59,350 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:47:59,350 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:47:59,350 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:47:59,350 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:47:59,351 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:47:59,351 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:47:59,351 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:47:59,352 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:47:59,352 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:47:59,352 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:47:59,352 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:47:59,352 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:47:59,352 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 47814a6c2066a31334f0b50a42e69cfeb567d5dd7f02dc6c703588c90e067366 [2024-11-22 21:47:59,549 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:47:59,570 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:47:59,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:47:59,573 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:47:59,573 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:47:59,574 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2024-11-22 21:48:00,987 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:48:01,158 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:48:01,159 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-min-max-dec.wvr.c [2024-11-22 21:48:01,173 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e62513621/77aba060a2f444699f628ce4df78bec9/FLAGf5ce40f96 [2024-11-22 21:48:01,185 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/e62513621/77aba060a2f444699f628ce4df78bec9 [2024-11-22 21:48:01,186 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:48:01,187 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:48:01,188 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:48:01,188 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:48:01,192 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:48:01,193 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:48:01" (1/1) ... [2024-11-22 21:48:01,193 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@16b47a13 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:01, skipping insertion in model container [2024-11-22 21:48:01,194 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:48:01" (1/1) ... [2024-11-22 21:48:01,217 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:48:01,375 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 21:48:01,377 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:48:01,384 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:48:01,407 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:48:01,420 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:48:01,421 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:01 WrapperNode [2024-11-22 21:48:01,421 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:48:01,421 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:48:01,422 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:48:01,422 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:48:01,426 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:01" (1/1) ... [2024-11-22 21:48:01,432 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:01" (1/1) ... [2024-11-22 21:48:01,447 INFO L138 Inliner]: procedures = 23, calls = 26, calls flagged for inlining = 9, calls inlined = 9, statements flattened = 120 [2024-11-22 21:48:01,447 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:48:01,448 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:48:01,448 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:48:01,448 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:48:01,456 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:01" (1/1) ... [2024-11-22 21:48:01,456 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:01" (1/1) ... [2024-11-22 21:48:01,458 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:01" (1/1) ... [2024-11-22 21:48:01,468 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-22 21:48:01,469 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:01" (1/1) ... [2024-11-22 21:48:01,469 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:01" (1/1) ... [2024-11-22 21:48:01,477 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:01" (1/1) ... [2024-11-22 21:48:01,480 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:01" (1/1) ... [2024-11-22 21:48:01,481 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:01" (1/1) ... [2024-11-22 21:48:01,482 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:01" (1/1) ... [2024-11-22 21:48:01,484 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:48:01,485 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:48:01,485 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:48:01,485 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:48:01,485 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:01" (1/1) ... [2024-11-22 21:48:01,490 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:48:01,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:01,510 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 21:48:01,518 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 21:48:01,557 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:48:01,557 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:48:01,557 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:48:01,557 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:48:01,558 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:48:01,558 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-22 21:48:01,558 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-22 21:48:01,558 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-22 21:48:01,558 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-22 21:48:01,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:48:01,558 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:48:01,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:48:01,559 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:48:01,559 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:48:01,559 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:48:01,560 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:48:01,560 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:48:01,563 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:48:01,564 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 21:48:01,666 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:48:01,668 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:48:01,944 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:48:01,944 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:48:02,120 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:48:02,121 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-22 21:48:02,121 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:48:02 BoogieIcfgContainer [2024-11-22 21:48:02,122 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:48:02,124 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:48:02,125 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:48:02,127 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:48:02,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:48:01" (1/3) ... [2024-11-22 21:48:02,129 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58392d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:48:02, skipping insertion in model container [2024-11-22 21:48:02,129 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:48:01" (2/3) ... [2024-11-22 21:48:02,130 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58392d00 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:48:02, skipping insertion in model container [2024-11-22 21:48:02,130 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:48:02" (3/3) ... [2024-11-22 21:48:02,131 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-min-max-dec.wvr.c [2024-11-22 21:48:02,144 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:48:02,144 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-22 21:48:02,144 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:48:02,224 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-22 21:48:02,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 88 places, 81 transitions, 190 flow [2024-11-22 21:48:02,283 INFO L124 PetriNetUnfolderBase]: 6/77 cut-off events. [2024-11-22 21:48:02,283 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-22 21:48:02,287 INFO L83 FinitePrefix]: Finished finitePrefix Result has 94 conditions, 77 events. 6/77 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 13. Compared 221 event pairs, 0 based on Foata normal form. 0/53 useless extension candidates. Maximal degree in co-relation 69. Up to 2 conditions per place. [2024-11-22 21:48:02,287 INFO L82 GeneralOperation]: Start removeDead. Operand has 88 places, 81 transitions, 190 flow [2024-11-22 21:48:02,290 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 83 places, 76 transitions, 176 flow [2024-11-22 21:48:02,302 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:48:02,311 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;@31258a61, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:48:02,312 INFO L334 AbstractCegarLoop]: Starting to check reachability of 36 error locations. [2024-11-22 21:48:02,315 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:48:02,315 INFO L124 PetriNetUnfolderBase]: 1/6 cut-off events. [2024-11-22 21:48:02,316 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:48:02,316 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:02,316 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-22 21:48:02,317 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-22 21:48:02,320 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:02,321 INFO L85 PathProgramCache]: Analyzing trace with hash 496606758, now seen corresponding path program 1 times [2024-11-22 21:48:02,327 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:02,328 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [895089625] [2024-11-22 21:48:02,328 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:02,328 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:02,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:02,541 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 21:48:02,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:02,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [895089625] [2024-11-22 21:48:02,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [895089625] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:02,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:02,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:48:02,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726146673] [2024-11-22 21:48:02,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:02,550 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:48:02,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:02,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:48:02,599 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:48:02,610 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 81 [2024-11-22 21:48:02,612 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 176 flow. Second operand has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:02,612 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:02,612 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 81 [2024-11-22 21:48:02,614 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:05,709 INFO L124 PetriNetUnfolderBase]: 32532/45884 cut-off events. [2024-11-22 21:48:05,709 INFO L125 PetriNetUnfolderBase]: For 1812/1812 co-relation queries the response was YES. [2024-11-22 21:48:05,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88242 conditions, 45884 events. 32532/45884 cut-off events. For 1812/1812 co-relation queries the response was YES. Maximal size of possible extension queue 2754. Compared 341359 event pairs, 23751 based on Foata normal form. 1/30795 useless extension candidates. Maximal degree in co-relation 85331. Up to 39794 conditions per place. [2024-11-22 21:48:06,038 INFO L140 encePairwiseOnDemand]: 75/81 looper letters, 46 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2024-11-22 21:48:06,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 71 transitions, 262 flow [2024-11-22 21:48:06,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:48:06,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:48:06,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 136 transitions. [2024-11-22 21:48:06,049 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5596707818930041 [2024-11-22 21:48:06,050 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 176 flow. Second operand 3 states and 136 transitions. [2024-11-22 21:48:06,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 71 transitions, 262 flow [2024-11-22 21:48:06,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 71 transitions, 246 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-22 21:48:06,104 INFO L231 Difference]: Finished difference. Result has 72 places, 71 transitions, 154 flow [2024-11-22 21:48:06,106 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=154, PETRI_PLACES=72, PETRI_TRANSITIONS=71} [2024-11-22 21:48:06,109 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -11 predicate places. [2024-11-22 21:48:06,109 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 71 transitions, 154 flow [2024-11-22 21:48:06,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.333333333333332) internal successors, (88), 3 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:06,110 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:06,110 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-22 21:48:06,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:48:06,110 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-22 21:48:06,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:06,111 INFO L85 PathProgramCache]: Analyzing trace with hash 496606759, now seen corresponding path program 1 times [2024-11-22 21:48:06,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:06,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350517347] [2024-11-22 21:48:06,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:06,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:06,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:06,361 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 21:48:06,362 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:06,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350517347] [2024-11-22 21:48:06,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350517347] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:06,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:06,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:48:06,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649993047] [2024-11-22 21:48:06,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:06,367 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:48:06,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:06,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:48:06,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:48:06,392 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 81 [2024-11-22 21:48:06,393 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 71 transitions, 154 flow. Second operand has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 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 21:48:06,395 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:06,395 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 81 [2024-11-22 21:48:06,395 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:08,779 INFO L124 PetriNetUnfolderBase]: 32532/45886 cut-off events. [2024-11-22 21:48:08,780 INFO L125 PetriNetUnfolderBase]: For 252/252 co-relation queries the response was YES. [2024-11-22 21:48:08,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86802 conditions, 45886 events. 32532/45886 cut-off events. For 252/252 co-relation queries the response was YES. Maximal size of possible extension queue 2754. Compared 341112 event pairs, 23751 based on Foata normal form. 1/30797 useless extension candidates. Maximal degree in co-relation 86779. Up to 39796 conditions per place. [2024-11-22 21:48:09,115 INFO L140 encePairwiseOnDemand]: 76/81 looper letters, 49 selfloop transitions, 3 changer transitions 0/73 dead transitions. [2024-11-22 21:48:09,115 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 73 transitions, 262 flow [2024-11-22 21:48:09,116 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:48:09,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:48:09,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 189 transitions. [2024-11-22 21:48:09,117 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-22 21:48:09,117 INFO L175 Difference]: Start difference. First operand has 72 places, 71 transitions, 154 flow. Second operand 5 states and 189 transitions. [2024-11-22 21:48:09,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 73 transitions, 262 flow [2024-11-22 21:48:09,118 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 73 transitions, 258 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:09,120 INFO L231 Difference]: Finished difference. Result has 75 places, 72 transitions, 166 flow [2024-11-22 21:48:09,120 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=75, PETRI_TRANSITIONS=72} [2024-11-22 21:48:09,121 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -8 predicate places. [2024-11-22 21:48:09,121 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 72 transitions, 166 flow [2024-11-22 21:48:09,121 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 27.833333333333332) internal successors, (167), 6 states have internal predecessors, (167), 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 21:48:09,121 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:09,121 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-22 21:48:09,121 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:48:09,121 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-22 21:48:09,122 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:09,122 INFO L85 PathProgramCache]: Analyzing trace with hash 497742279, now seen corresponding path program 1 times [2024-11-22 21:48:09,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:09,122 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796228593] [2024-11-22 21:48:09,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:09,122 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:09,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:09,321 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 21:48:09,321 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:09,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796228593] [2024-11-22 21:48:09,321 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796228593] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:09,321 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984764120] [2024-11-22 21:48:09,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:09,322 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:09,322 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:09,324 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 21:48:09,326 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 21:48:09,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:09,384 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 21:48:09,390 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:09,444 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:48:09,549 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 21:48:09,549 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:09,686 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 21:48:09,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984764120] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:09,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:09,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2024-11-22 21:48:09,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [534893733] [2024-11-22 21:48:09,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:09,688 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-11-22 21:48:09,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:09,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-11-22 21:48:09,688 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2024-11-22 21:48:09,782 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 81 [2024-11-22 21:48:09,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 72 transitions, 166 flow. Second operand has 15 states, 15 states have (on average 28.266666666666666) internal successors, (424), 15 states have internal predecessors, (424), 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 21:48:09,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:09,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 81 [2024-11-22 21:48:09,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:12,388 INFO L124 PetriNetUnfolderBase]: 32533/45888 cut-off events. [2024-11-22 21:48:12,388 INFO L125 PetriNetUnfolderBase]: For 253/253 co-relation queries the response was YES. [2024-11-22 21:48:12,446 INFO L83 FinitePrefix]: Finished finitePrefix Result has 86813 conditions, 45888 events. 32533/45888 cut-off events. For 253/253 co-relation queries the response was YES. Maximal size of possible extension queue 2754. Compared 341140 event pairs, 23751 based on Foata normal form. 0/30799 useless extension candidates. Maximal degree in co-relation 86795. Up to 39793 conditions per place. [2024-11-22 21:48:12,584 INFO L140 encePairwiseOnDemand]: 75/81 looper letters, 45 selfloop transitions, 9 changer transitions 0/75 dead transitions. [2024-11-22 21:48:12,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 75 transitions, 282 flow [2024-11-22 21:48:12,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:48:12,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:48:12,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 299 transitions. [2024-11-22 21:48:12,586 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4101508916323731 [2024-11-22 21:48:12,586 INFO L175 Difference]: Start difference. First operand has 75 places, 72 transitions, 166 flow. Second operand 9 states and 299 transitions. [2024-11-22 21:48:12,586 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 75 transitions, 282 flow [2024-11-22 21:48:12,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 75 transitions, 279 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:12,588 INFO L231 Difference]: Finished difference. Result has 80 places, 75 transitions, 191 flow [2024-11-22 21:48:12,588 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=191, PETRI_PLACES=80, PETRI_TRANSITIONS=75} [2024-11-22 21:48:12,589 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -3 predicate places. [2024-11-22 21:48:12,589 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 75 transitions, 191 flow [2024-11-22 21:48:12,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 28.266666666666666) internal successors, (424), 15 states have internal predecessors, (424), 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 21:48:12,589 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:12,589 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:12,598 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 21:48:12,793 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 21:48:12,794 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-22 21:48:12,794 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:12,794 INFO L85 PathProgramCache]: Analyzing trace with hash 1589070633, now seen corresponding path program 1 times [2024-11-22 21:48:12,795 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:12,795 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85206289] [2024-11-22 21:48:12,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:12,795 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:12,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:12,839 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 21:48:12,840 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:12,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85206289] [2024-11-22 21:48:12,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [85206289] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:12,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:48:12,840 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:48:12,840 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100266288] [2024-11-22 21:48:12,840 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:12,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:48:12,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:12,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:48:12,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:48:12,847 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 81 [2024-11-22 21:48:12,848 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 75 transitions, 191 flow. Second operand has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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 21:48:12,848 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:12,848 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 81 [2024-11-22 21:48:12,848 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:14,007 INFO L124 PetriNetUnfolderBase]: 16596/24017 cut-off events. [2024-11-22 21:48:14,008 INFO L125 PetriNetUnfolderBase]: For 165/165 co-relation queries the response was YES. [2024-11-22 21:48:14,041 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44851 conditions, 24017 events. 16596/24017 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 1423. Compared 170570 event pairs, 11993 based on Foata normal form. 0/18586 useless extension candidates. Maximal degree in co-relation 44831. Up to 20220 conditions per place. [2024-11-22 21:48:14,110 INFO L140 encePairwiseOnDemand]: 73/81 looper letters, 44 selfloop transitions, 3 changer transitions 0/69 dead transitions. [2024-11-22 21:48:14,111 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 69 transitions, 273 flow [2024-11-22 21:48:14,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:48:14,111 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:48:14,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 160 transitions. [2024-11-22 21:48:14,112 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49382716049382713 [2024-11-22 21:48:14,112 INFO L175 Difference]: Start difference. First operand has 80 places, 75 transitions, 191 flow. Second operand 4 states and 160 transitions. [2024-11-22 21:48:14,112 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 69 transitions, 273 flow [2024-11-22 21:48:14,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 69 transitions, 258 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-11-22 21:48:14,113 INFO L231 Difference]: Finished difference. Result has 73 places, 69 transitions, 170 flow [2024-11-22 21:48:14,113 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=164, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=170, PETRI_PLACES=73, PETRI_TRANSITIONS=69} [2024-11-22 21:48:14,114 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -10 predicate places. [2024-11-22 21:48:14,114 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 69 transitions, 170 flow [2024-11-22 21:48:14,114 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 29.75) internal successors, (119), 4 states have internal predecessors, (119), 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 21:48:14,115 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:14,115 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:14,115 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 21:48:14,115 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-22 21:48:14,115 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:14,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1589070634, now seen corresponding path program 1 times [2024-11-22 21:48:14,116 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:14,116 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910323996] [2024-11-22 21:48:14,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:14,116 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:14,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:14,247 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 21:48:14,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:14,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910323996] [2024-11-22 21:48:14,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [910323996] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:14,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433260514] [2024-11-22 21:48:14,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:14,249 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:14,249 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:14,250 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 21:48:14,251 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 21:48:14,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:14,299 INFO L255 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 21:48:14,300 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:14,342 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 21:48:14,342 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:14,360 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-22 21:48:14,370 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 21:48:14,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1433260514] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:14,371 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:14,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-22 21:48:14,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1565475913] [2024-11-22 21:48:14,371 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:14,372 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 21:48:14,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:14,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 21:48:14,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-22 21:48:14,390 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 81 [2024-11-22 21:48:14,391 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 69 transitions, 170 flow. Second operand has 8 states, 8 states have (on average 30.625) internal successors, (245), 8 states have internal predecessors, (245), 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 21:48:14,391 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:14,391 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 81 [2024-11-22 21:48:14,391 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:15,675 INFO L124 PetriNetUnfolderBase]: 13094/19015 cut-off events. [2024-11-22 21:48:15,676 INFO L125 PetriNetUnfolderBase]: For 144/144 co-relation queries the response was YES. [2024-11-22 21:48:15,696 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35307 conditions, 19015 events. 13094/19015 cut-off events. For 144/144 co-relation queries the response was YES. Maximal size of possible extension queue 1206. Compared 132205 event pairs, 9124 based on Foata normal form. 0/15340 useless extension candidates. Maximal degree in co-relation 35290. Up to 15819 conditions per place. [2024-11-22 21:48:15,747 INFO L140 encePairwiseOnDemand]: 76/81 looper letters, 41 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2024-11-22 21:48:15,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 75 places, 67 transitions, 256 flow [2024-11-22 21:48:15,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:48:15,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:48:15,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 189 transitions. [2024-11-22 21:48:15,749 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4666666666666667 [2024-11-22 21:48:15,749 INFO L175 Difference]: Start difference. First operand has 73 places, 69 transitions, 170 flow. Second operand 5 states and 189 transitions. [2024-11-22 21:48:15,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 75 places, 67 transitions, 256 flow [2024-11-22 21:48:15,750 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 67 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:15,751 INFO L231 Difference]: Finished difference. Result has 73 places, 67 transitions, 170 flow [2024-11-22 21:48:15,751 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=170, PETRI_PLACES=73, PETRI_TRANSITIONS=67} [2024-11-22 21:48:15,751 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -10 predicate places. [2024-11-22 21:48:15,751 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 67 transitions, 170 flow [2024-11-22 21:48:15,752 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 30.625) internal successors, (245), 8 states have internal predecessors, (245), 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 21:48:15,752 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:15,752 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:15,758 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 21:48:15,952 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:15,952 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-22 21:48:15,953 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:15,953 INFO L85 PathProgramCache]: Analyzing trace with hash -1026431102, now seen corresponding path program 1 times [2024-11-22 21:48:15,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:15,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981545769] [2024-11-22 21:48:15,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:15,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:15,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:16,089 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 21:48:16,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:16,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981545769] [2024-11-22 21:48:16,090 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981545769] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:16,090 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052368549] [2024-11-22 21:48:16,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:16,092 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:16,092 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:16,097 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 21:48:16,100 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 21:48:16,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:16,151 INFO L255 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:48:16,152 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:16,213 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 21:48:16,213 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:16,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-22 21:48:16,256 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 21:48:16,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1052368549] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:16,257 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:16,257 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 10 [2024-11-22 21:48:16,257 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355813987] [2024-11-22 21:48:16,257 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:16,258 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:48:16,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:16,258 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:48:16,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:48:16,286 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 81 [2024-11-22 21:48:16,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 67 transitions, 170 flow. Second operand has 11 states, 11 states have (on average 31.272727272727273) internal successors, (344), 11 states have internal predecessors, (344), 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 21:48:16,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:16,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 81 [2024-11-22 21:48:16,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:17,809 INFO L124 PetriNetUnfolderBase]: 18150/25635 cut-off events. [2024-11-22 21:48:17,810 INFO L125 PetriNetUnfolderBase]: For 227/227 co-relation queries the response was YES. [2024-11-22 21:48:17,841 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48289 conditions, 25635 events. 18150/25635 cut-off events. For 227/227 co-relation queries the response was YES. Maximal size of possible extension queue 1450. Compared 173150 event pairs, 4988 based on Foata normal form. 0/21708 useless extension candidates. Maximal degree in co-relation 48271. Up to 8507 conditions per place. [2024-11-22 21:48:17,908 INFO L140 encePairwiseOnDemand]: 72/81 looper letters, 78 selfloop transitions, 9 changer transitions 0/109 dead transitions. [2024-11-22 21:48:17,908 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 109 transitions, 434 flow [2024-11-22 21:48:17,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:48:17,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:48:17,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 290 transitions. [2024-11-22 21:48:17,910 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5114638447971781 [2024-11-22 21:48:17,910 INFO L175 Difference]: Start difference. First operand has 73 places, 67 transitions, 170 flow. Second operand 7 states and 290 transitions. [2024-11-22 21:48:17,910 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 109 transitions, 434 flow [2024-11-22 21:48:17,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 109 transitions, 428 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:48:17,911 INFO L231 Difference]: Finished difference. Result has 77 places, 69 transitions, 202 flow [2024-11-22 21:48:17,911 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=202, PETRI_PLACES=77, PETRI_TRANSITIONS=69} [2024-11-22 21:48:17,912 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -6 predicate places. [2024-11-22 21:48:17,912 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 69 transitions, 202 flow [2024-11-22 21:48:17,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 31.272727272727273) internal successors, (344), 11 states have internal predecessors, (344), 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 21:48:17,913 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:17,913 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:17,925 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 21:48:18,116 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:18,117 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-22 21:48:18,117 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:18,117 INFO L85 PathProgramCache]: Analyzing trace with hash 1203647856, now seen corresponding path program 1 times [2024-11-22 21:48:18,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:18,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186821674] [2024-11-22 21:48:18,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:18,118 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:18,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:18,213 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 21:48:18,213 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:18,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186821674] [2024-11-22 21:48:18,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1186821674] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:18,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117933117] [2024-11-22 21:48:18,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:18,214 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:18,214 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:18,215 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 21:48:18,220 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 21:48:18,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:18,266 INFO L255 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-22 21:48:18,267 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:18,303 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 21:48:18,303 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:48:18,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1117933117] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:18,303 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:48:18,303 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-11-22 21:48:18,304 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811953345] [2024-11-22 21:48:18,304 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:18,304 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:48:18,304 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:18,304 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:48:18,305 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-22 21:48:18,312 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 81 [2024-11-22 21:48:18,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 69 transitions, 202 flow. Second operand has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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 21:48:18,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:18,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 81 [2024-11-22 21:48:18,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:20,365 INFO L124 PetriNetUnfolderBase]: 22097/35426 cut-off events. [2024-11-22 21:48:20,366 INFO L125 PetriNetUnfolderBase]: For 8698/8698 co-relation queries the response was YES. [2024-11-22 21:48:20,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69190 conditions, 35426 events. 22097/35426 cut-off events. For 8698/8698 co-relation queries the response was YES. Maximal size of possible extension queue 1245. Compared 275758 event pairs, 2687 based on Foata normal form. 0/31595 useless extension candidates. Maximal degree in co-relation 69170. Up to 17941 conditions per place. [2024-11-22 21:48:20,553 INFO L140 encePairwiseOnDemand]: 75/81 looper letters, 93 selfloop transitions, 5 changer transitions 0/119 dead transitions. [2024-11-22 21:48:20,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 119 transitions, 552 flow [2024-11-22 21:48:20,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:48:20,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:48:20,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 197 transitions. [2024-11-22 21:48:20,556 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6080246913580247 [2024-11-22 21:48:20,556 INFO L175 Difference]: Start difference. First operand has 77 places, 69 transitions, 202 flow. Second operand 4 states and 197 transitions. [2024-11-22 21:48:20,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 119 transitions, 552 flow [2024-11-22 21:48:20,560 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 119 transitions, 546 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:48:20,562 INFO L231 Difference]: Finished difference. Result has 79 places, 73 transitions, 229 flow [2024-11-22 21:48:20,562 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=69, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=229, PETRI_PLACES=79, PETRI_TRANSITIONS=73} [2024-11-22 21:48:20,562 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -4 predicate places. [2024-11-22 21:48:20,562 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 73 transitions, 229 flow [2024-11-22 21:48:20,563 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.25) internal successors, (121), 4 states have internal predecessors, (121), 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 21:48:20,563 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:20,563 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:20,570 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 21:48:20,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:20,767 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-22 21:48:20,767 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:20,767 INFO L85 PathProgramCache]: Analyzing trace with hash -1139311222, now seen corresponding path program 1 times [2024-11-22 21:48:20,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:20,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [813862685] [2024-11-22 21:48:20,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:20,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:20,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:20,867 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 21:48:20,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:20,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [813862685] [2024-11-22 21:48:20,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [813862685] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:20,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176833024] [2024-11-22 21:48:20,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:20,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:20,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:20,870 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 21:48:20,873 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 21:48:20,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:20,927 INFO L255 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-22 21:48:20,928 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:20,968 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 21:48:20,968 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:48:20,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1176833024] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:48:20,969 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:48:20,969 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 7 [2024-11-22 21:48:20,969 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854960440] [2024-11-22 21:48:20,969 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:48:20,969 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:48:20,969 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:20,969 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:48:20,970 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-11-22 21:48:20,978 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 81 [2024-11-22 21:48:20,978 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 73 transitions, 229 flow. Second operand has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:20,978 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:20,978 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 81 [2024-11-22 21:48:20,978 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:23,739 INFO L124 PetriNetUnfolderBase]: 31336/48676 cut-off events. [2024-11-22 21:48:23,739 INFO L125 PetriNetUnfolderBase]: For 17743/19183 co-relation queries the response was YES. [2024-11-22 21:48:24,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 104217 conditions, 48676 events. 31336/48676 cut-off events. For 17743/19183 co-relation queries the response was YES. Maximal size of possible extension queue 1577. Compared 376782 event pairs, 4070 based on Foata normal form. 1440/46107 useless extension candidates. Maximal degree in co-relation 104198. Up to 26029 conditions per place. [2024-11-22 21:48:24,201 INFO L140 encePairwiseOnDemand]: 75/81 looper letters, 96 selfloop transitions, 5 changer transitions 0/122 dead transitions. [2024-11-22 21:48:24,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 122 transitions, 597 flow [2024-11-22 21:48:24,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:48:24,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:48:24,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-11-22 21:48:24,202 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6049382716049383 [2024-11-22 21:48:24,202 INFO L175 Difference]: Start difference. First operand has 79 places, 73 transitions, 229 flow. Second operand 4 states and 196 transitions. [2024-11-22 21:48:24,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 122 transitions, 597 flow [2024-11-22 21:48:24,209 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 122 transitions, 590 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:48:24,210 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 247 flow [2024-11-22 21:48:24,210 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=224, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=247, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2024-11-22 21:48:24,211 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, -1 predicate places. [2024-11-22 21:48:24,211 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 247 flow [2024-11-22 21:48:24,211 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.75) internal successors, (123), 4 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:24,211 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:24,211 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:24,217 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 21:48:24,415 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:24,416 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-22 21:48:24,416 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:24,416 INFO L85 PathProgramCache]: Analyzing trace with hash -2018230301, now seen corresponding path program 1 times [2024-11-22 21:48:24,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:24,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490906585] [2024-11-22 21:48:24,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:24,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:24,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:24,505 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:24,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:24,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490906585] [2024-11-22 21:48:24,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490906585] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:24,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089780157] [2024-11-22 21:48:24,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:24,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:24,506 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:24,509 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:24,510 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:48:24,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:24,565 INFO L255 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:48:24,566 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:24,622 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:24,622 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:24,670 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:24,670 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2089780157] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:24,670 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:24,670 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-22 21:48:24,670 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281172918] [2024-11-22 21:48:24,670 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:24,670 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:48:24,671 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:24,671 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:48:24,673 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:48:24,716 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 81 [2024-11-22 21:48:24,716 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 247 flow. Second operand has 14 states, 14 states have (on average 29.857142857142858) internal successors, (418), 14 states have internal predecessors, (418), 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 21:48:24,716 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:24,717 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 81 [2024-11-22 21:48:24,717 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:29,345 INFO L124 PetriNetUnfolderBase]: 50882/71306 cut-off events. [2024-11-22 21:48:29,345 INFO L125 PetriNetUnfolderBase]: For 29736/35855 co-relation queries the response was YES. [2024-11-22 21:48:29,525 INFO L83 FinitePrefix]: Finished finitePrefix Result has 172623 conditions, 71306 events. 50882/71306 cut-off events. For 29736/35855 co-relation queries the response was YES. Maximal size of possible extension queue 2837. Compared 520226 event pairs, 27591 based on Foata normal form. 6797/75717 useless extension candidates. Maximal degree in co-relation 172601. Up to 39302 conditions per place. [2024-11-22 21:48:29,769 INFO L140 encePairwiseOnDemand]: 71/81 looper letters, 134 selfloop transitions, 12 changer transitions 0/166 dead transitions. [2024-11-22 21:48:29,769 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 166 transitions, 853 flow [2024-11-22 21:48:29,770 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:48:29,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:48:29,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 336 transitions. [2024-11-22 21:48:29,771 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5185185185185185 [2024-11-22 21:48:29,771 INFO L175 Difference]: Start difference. First operand has 82 places, 75 transitions, 247 flow. Second operand 8 states and 336 transitions. [2024-11-22 21:48:29,771 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 166 transitions, 853 flow [2024-11-22 21:48:29,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 166 transitions, 828 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:48:29,797 INFO L231 Difference]: Finished difference. Result has 90 places, 79 transitions, 307 flow [2024-11-22 21:48:29,798 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=240, PETRI_DIFFERENCE_MINUEND_PLACES=80, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=307, PETRI_PLACES=90, PETRI_TRANSITIONS=79} [2024-11-22 21:48:29,799 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 7 predicate places. [2024-11-22 21:48:29,799 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 79 transitions, 307 flow [2024-11-22 21:48:29,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 29.857142857142858) internal successors, (418), 14 states have internal predecessors, (418), 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 21:48:29,800 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:29,800 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:29,808 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 21:48:30,001 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:30,002 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-22 21:48:30,002 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:30,002 INFO L85 PathProgramCache]: Analyzing trace with hash 803850553, now seen corresponding path program 1 times [2024-11-22 21:48:30,002 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:30,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749103162] [2024-11-22 21:48:30,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:30,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:30,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:30,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:30,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:48:30,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749103162] [2024-11-22 21:48:30,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [749103162] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:48:30,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1167290183] [2024-11-22 21:48:30,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:48:30,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:30,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:48:30,069 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:48:30,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:48:30,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:48:30,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 126 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-22 21:48:30,115 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:48:30,166 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:30,166 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:48:30,210 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:48:30,210 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1167290183] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:48:30,210 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:48:30,210 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-22 21:48:30,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550216259] [2024-11-22 21:48:30,211 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:48:30,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:48:30,211 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:48:30,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:48:30,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=126, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:48:30,259 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 81 [2024-11-22 21:48:30,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 79 transitions, 307 flow. Second operand has 14 states, 14 states have (on average 28.428571428571427) internal successors, (398), 14 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:30,260 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:48:30,260 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 81 [2024-11-22 21:48:30,260 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:48:35,540 INFO L124 PetriNetUnfolderBase]: 50949/73683 cut-off events. [2024-11-22 21:48:35,540 INFO L125 PetriNetUnfolderBase]: For 58131/61739 co-relation queries the response was YES. [2024-11-22 21:48:35,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180152 conditions, 73683 events. 50949/73683 cut-off events. For 58131/61739 co-relation queries the response was YES. Maximal size of possible extension queue 2373. Compared 540604 event pairs, 31419 based on Foata normal form. 3590/73948 useless extension candidates. Maximal degree in co-relation 180122. Up to 43909 conditions per place. [2024-11-22 21:48:36,088 INFO L140 encePairwiseOnDemand]: 71/81 looper letters, 132 selfloop transitions, 12 changer transitions 0/163 dead transitions. [2024-11-22 21:48:36,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 163 transitions, 893 flow [2024-11-22 21:48:36,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:48:36,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:48:36,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 333 transitions. [2024-11-22 21:48:36,090 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5138888888888888 [2024-11-22 21:48:36,090 INFO L175 Difference]: Start difference. First operand has 90 places, 79 transitions, 307 flow. Second operand 8 states and 333 transitions. [2024-11-22 21:48:36,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 163 transitions, 893 flow [2024-11-22 21:48:36,162 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 163 transitions, 874 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-22 21:48:36,163 INFO L231 Difference]: Finished difference. Result has 96 places, 83 transitions, 353 flow [2024-11-22 21:48:36,163 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=81, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=353, PETRI_PLACES=96, PETRI_TRANSITIONS=83} [2024-11-22 21:48:36,164 INFO L277 CegarLoopForPetriNet]: 83 programPoint places, 13 predicate places. [2024-11-22 21:48:36,164 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 83 transitions, 353 flow [2024-11-22 21:48:36,164 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 28.428571428571427) internal successors, (398), 14 states have internal predecessors, (398), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:48:36,164 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:48:36,164 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:48:36,171 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 21:48:36,368 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:48:36,369 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 33 more)] === [2024-11-22 21:48:36,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:48:36,369 INFO L85 PathProgramCache]: Analyzing trace with hash -493175933, now seen corresponding path program 2 times [2024-11-22 21:48:36,369 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:48:36,369 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1108324896] [2024-11-22 21:48:36,370 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:48:36,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:48:36,382 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:48:36,383 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat