./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.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 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:50:34,965 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:50:35,005 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:50:35,008 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:50:35,008 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:50:35,024 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:50:35,025 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:50:35,025 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:50:35,025 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:50:35,026 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:50:35,026 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:50:35,026 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:50:35,027 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:50:35,027 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:50:35,027 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:50:35,028 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:50:35,028 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:50:35,028 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:50:35,029 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:50:35,029 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:50:35,029 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:50:35,030 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:50:35,030 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:50:35,030 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:50:35,031 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:50:35,031 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:50:35,031 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:50:35,031 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:50:35,032 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:50:35,032 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:50:35,032 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:50:35,033 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:50:35,033 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:50:35,033 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:50:35,034 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:50:35,034 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:50:35,034 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:50:35,034 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:50:35,035 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:50:35,035 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:50:35,035 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:50:35,041 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:50:35,041 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 83c7202603a0719c5812e4d7043f4665de4d954c89c656bd6312ac9e8fdcb494 [2024-11-09 10:50:35,267 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:50:35,287 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:50:35,289 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:50:35,290 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:50:35,290 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:50:35,291 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-11-09 10:50:36,998 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:50:37,213 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:50:37,213 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-commit-1.wvr-bad.c [2024-11-09 10:50:37,221 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8465a86a4/135d14179e7c46bbb9790f14128dfd05/FLAG53ce44ba5 [2024-11-09 10:50:37,232 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8465a86a4/135d14179e7c46bbb9790f14128dfd05 [2024-11-09 10:50:37,234 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:50:37,236 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:50:37,238 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:50:37,238 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:50:37,242 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:50:37,242 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:50:37" (1/1) ... [2024-11-09 10:50:37,245 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@770f7fc5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:37, skipping insertion in model container [2024-11-09 10:50:37,245 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:50:37" (1/1) ... [2024-11-09 10:50:37,264 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:50:37,481 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:50:37,483 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:50:37,492 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:50:37,519 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:50:37,533 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:50:37,533 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:37 WrapperNode [2024-11-09 10:50:37,534 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:50:37,534 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:50:37,535 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:50:37,535 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:50:37,542 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:37" (1/1) ... [2024-11-09 10:50:37,549 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:37" (1/1) ... [2024-11-09 10:50:37,579 INFO L138 Inliner]: procedures = 24, calls = 54, calls flagged for inlining = 21, calls inlined = 25, statements flattened = 339 [2024-11-09 10:50:37,583 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:50:37,583 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:50:37,584 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:50:37,584 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:50:37,594 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:37" (1/1) ... [2024-11-09 10:50:37,595 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:37" (1/1) ... [2024-11-09 10:50:37,602 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:37" (1/1) ... [2024-11-09 10:50:37,630 INFO L175 MemorySlicer]: Split 13 memory accesses to 2 slices as follows [2, 11]. 85 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-09 10:50:37,630 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:37" (1/1) ... [2024-11-09 10:50:37,630 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:37" (1/1) ... [2024-11-09 10:50:37,646 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:37" (1/1) ... [2024-11-09 10:50:37,654 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:37" (1/1) ... [2024-11-09 10:50:37,656 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:37" (1/1) ... [2024-11-09 10:50:37,661 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:37" (1/1) ... [2024-11-09 10:50:37,667 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:50:37,668 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:50:37,668 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:50:37,668 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:50:37,673 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:37" (1/1) ... [2024-11-09 10:50:37,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:50:37,689 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:37,704 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-09 10:50:37,712 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-09 10:50:37,744 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:50:37,745 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:50:37,745 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:50:37,745 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:50:37,745 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:50:37,745 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 10:50:37,745 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 10:50:37,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:50:37,746 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:50:37,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:50:37,747 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:50:37,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 10:50:37,747 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 10:50:37,747 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:50:37,747 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:50:37,748 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:50:37,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:50:37,748 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:50:37,749 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:50:37,855 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:50:37,857 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:50:38,284 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:50:38,285 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:50:38,687 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:50:38,688 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-09 10:50:38,689 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:50:38 BoogieIcfgContainer [2024-11-09 10:50:38,689 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:50:38,693 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:50:38,693 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:50:38,696 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:50:38,697 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:50:37" (1/3) ... [2024-11-09 10:50:38,698 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c67de7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:50:38, skipping insertion in model container [2024-11-09 10:50:38,698 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:37" (2/3) ... [2024-11-09 10:50:38,699 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7c67de7b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:50:38, skipping insertion in model container [2024-11-09 10:50:38,699 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:50:38" (3/3) ... [2024-11-09 10:50:38,700 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-commit-1.wvr-bad.c [2024-11-09 10:50:38,722 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:50:38,723 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 24 error locations. [2024-11-09 10:50:38,723 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:50:38,827 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-09 10:50:38,857 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 88 transitions, 197 flow [2024-11-09 10:50:38,892 INFO L124 PetriNetUnfolderBase]: 17/85 cut-off events. [2024-11-09 10:50:38,892 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-09 10:50:38,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 98 conditions, 85 events. 17/85 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 253 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 64. Up to 6 conditions per place. [2024-11-09 10:50:38,896 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 88 transitions, 197 flow [2024-11-09 10:50:38,903 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 77 places, 84 transitions, 186 flow [2024-11-09 10:50:38,939 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:50:38,953 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;@49c2505, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:50:38,956 INFO L334 AbstractCegarLoop]: Starting to check reachability of 43 error locations. [2024-11-09 10:50:38,961 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:50:38,961 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:50:38,961 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:50:38,961 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:38,962 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:50:38,962 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-09 10:50:38,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:38,966 INFO L85 PathProgramCache]: Analyzing trace with hash 1042750, now seen corresponding path program 1 times [2024-11-09 10:50:38,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:38,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59437559] [2024-11-09 10:50:38,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:38,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:39,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:39,240 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:39,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:39,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59437559] [2024-11-09 10:50:39,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59437559] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:39,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:39,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:50:39,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332637414] [2024-11-09 10:50:39,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:39,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:50:39,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:39,279 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:50:39,280 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:50:39,295 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-11-09 10:50:39,298 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 84 transitions, 186 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:39,298 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:39,298 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-11-09 10:50:39,299 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:40,237 INFO L124 PetriNetUnfolderBase]: 7256/10526 cut-off events. [2024-11-09 10:50:40,238 INFO L125 PetriNetUnfolderBase]: For 340/340 co-relation queries the response was YES. [2024-11-09 10:50:40,259 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20342 conditions, 10526 events. 7256/10526 cut-off events. For 340/340 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 69469 event pairs, 5236 based on Foata normal form. 1/5686 useless extension candidates. Maximal degree in co-relation 19654. Up to 9450 conditions per place. [2024-11-09 10:50:40,308 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 54 selfloop transitions, 2 changer transitions 0/76 dead transitions. [2024-11-09 10:50:40,309 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 76 transitions, 282 flow [2024-11-09 10:50:40,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:50:40,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:50:40,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 135 transitions. [2024-11-09 10:50:40,321 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5113636363636364 [2024-11-09 10:50:40,323 INFO L175 Difference]: Start difference. First operand has 77 places, 84 transitions, 186 flow. Second operand 3 states and 135 transitions. [2024-11-09 10:50:40,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 76 transitions, 282 flow [2024-11-09 10:50:40,330 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 76 transitions, 270 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-09 10:50:40,335 INFO L231 Difference]: Finished difference. Result has 68 places, 76 transitions, 162 flow [2024-11-09 10:50:40,338 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=68, PETRI_TRANSITIONS=76} [2024-11-09 10:50:40,342 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, -9 predicate places. [2024-11-09 10:50:40,343 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 76 transitions, 162 flow [2024-11-09 10:50:40,343 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:40,343 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:40,344 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:50:40,344 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:50:40,344 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-09 10:50:40,345 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:40,345 INFO L85 PathProgramCache]: Analyzing trace with hash 1042751, now seen corresponding path program 1 times [2024-11-09 10:50:40,345 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:40,345 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [776446908] [2024-11-09 10:50:40,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:40,346 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:40,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:40,588 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:40,589 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:40,589 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [776446908] [2024-11-09 10:50:40,589 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [776446908] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:40,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:40,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:50:40,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840548640] [2024-11-09 10:50:40,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:40,590 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:50:40,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:40,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:50:40,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:50:40,603 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-11-09 10:50:40,603 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 76 transitions, 162 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:40,603 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:40,604 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-11-09 10:50:40,604 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:41,423 INFO L124 PetriNetUnfolderBase]: 7256/10523 cut-off events. [2024-11-09 10:50:41,424 INFO L125 PetriNetUnfolderBase]: For 72/72 co-relation queries the response was YES. [2024-11-09 10:50:41,438 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20117 conditions, 10523 events. 7256/10523 cut-off events. For 72/72 co-relation queries the response was YES. Maximal size of possible extension queue 1012. Compared 69452 event pairs, 5236 based on Foata normal form. 0/5683 useless extension candidates. Maximal degree in co-relation 20092. Up to 9450 conditions per place. [2024-11-09 10:50:41,491 INFO L140 encePairwiseOnDemand]: 77/88 looper letters, 48 selfloop transitions, 8 changer transitions 0/73 dead transitions. [2024-11-09 10:50:41,491 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 73 transitions, 268 flow [2024-11-09 10:50:41,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:50:41,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:50:41,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 155 transitions. [2024-11-09 10:50:41,493 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4403409090909091 [2024-11-09 10:50:41,494 INFO L175 Difference]: Start difference. First operand has 68 places, 76 transitions, 162 flow. Second operand 4 states and 155 transitions. [2024-11-09 10:50:41,494 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 73 transitions, 268 flow [2024-11-09 10:50:41,494 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 73 transitions, 264 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:50:41,496 INFO L231 Difference]: Finished difference. Result has 66 places, 73 transitions, 168 flow [2024-11-09 10:50:41,496 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=168, PETRI_PLACES=66, PETRI_TRANSITIONS=73} [2024-11-09 10:50:41,496 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, -11 predicate places. [2024-11-09 10:50:41,497 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 73 transitions, 168 flow [2024-11-09 10:50:41,497 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:41,497 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:41,497 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:41,497 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:50:41,498 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-09 10:50:41,498 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:41,498 INFO L85 PathProgramCache]: Analyzing trace with hash 1084028577, now seen corresponding path program 1 times [2024-11-09 10:50:41,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:41,499 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2077198404] [2024-11-09 10:50:41,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:41,499 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:41,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:41,558 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:41,559 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:41,559 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2077198404] [2024-11-09 10:50:41,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2077198404] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:41,559 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:41,560 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:50:41,560 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [998036875] [2024-11-09 10:50:41,560 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:41,560 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:50:41,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:41,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:50:41,561 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:50:41,561 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-09 10:50:41,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 73 transitions, 168 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:41,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:41,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-09 10:50:41,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:42,667 INFO L124 PetriNetUnfolderBase]: 12107/17625 cut-off events. [2024-11-09 10:50:42,667 INFO L125 PetriNetUnfolderBase]: For 162/162 co-relation queries the response was YES. [2024-11-09 10:50:42,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33675 conditions, 17625 events. 12107/17625 cut-off events. For 162/162 co-relation queries the response was YES. Maximal size of possible extension queue 1334. Compared 121938 event pairs, 4256 based on Foata normal form. 350/10101 useless extension candidates. Maximal degree in co-relation 33644. Up to 9751 conditions per place. [2024-11-09 10:50:42,752 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 90 selfloop transitions, 3 changer transitions 0/110 dead transitions. [2024-11-09 10:50:42,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 110 transitions, 432 flow [2024-11-09 10:50:42,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:50:42,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:50:42,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2024-11-09 10:50:42,756 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-11-09 10:50:42,757 INFO L175 Difference]: Start difference. First operand has 66 places, 73 transitions, 168 flow. Second operand 3 states and 180 transitions. [2024-11-09 10:50:42,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 110 transitions, 432 flow [2024-11-09 10:50:42,758 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 110 transitions, 416 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:50:42,760 INFO L231 Difference]: Finished difference. Result has 66 places, 75 transitions, 181 flow [2024-11-09 10:50:42,761 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=181, PETRI_PLACES=66, PETRI_TRANSITIONS=75} [2024-11-09 10:50:42,761 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, -11 predicate places. [2024-11-09 10:50:42,761 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 75 transitions, 181 flow [2024-11-09 10:50:42,761 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:42,762 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:42,762 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:42,762 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 10:50:42,763 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-09 10:50:42,763 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:42,763 INFO L85 PathProgramCache]: Analyzing trace with hash -754850353, now seen corresponding path program 1 times [2024-11-09 10:50:42,764 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:42,764 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993957375] [2024-11-09 10:50:42,764 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:42,764 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:42,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:42,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:42,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:42,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993957375] [2024-11-09 10:50:42,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1993957375] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:42,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:42,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:50:42,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266753604] [2024-11-09 10:50:42,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:42,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:50:42,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:42,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:50:42,812 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:50:42,819 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 88 [2024-11-09 10:50:42,819 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 75 transitions, 181 flow. Second operand has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:42,820 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:42,820 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 88 [2024-11-09 10:50:42,820 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:44,258 INFO L124 PetriNetUnfolderBase]: 15255/21853 cut-off events. [2024-11-09 10:50:44,258 INFO L125 PetriNetUnfolderBase]: For 1276/1300 co-relation queries the response was YES. [2024-11-09 10:50:44,302 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44962 conditions, 21853 events. 15255/21853 cut-off events. For 1276/1300 co-relation queries the response was YES. Maximal size of possible extension queue 837. Compared 137905 event pairs, 5655 based on Foata normal form. 0/14468 useless extension candidates. Maximal degree in co-relation 8224. Up to 10528 conditions per place. [2024-11-09 10:50:44,401 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 91 selfloop transitions, 4 changer transitions 0/107 dead transitions. [2024-11-09 10:50:44,402 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 107 transitions, 443 flow [2024-11-09 10:50:44,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:50:44,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:50:44,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 160 transitions. [2024-11-09 10:50:44,405 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6060606060606061 [2024-11-09 10:50:44,405 INFO L175 Difference]: Start difference. First operand has 66 places, 75 transitions, 181 flow. Second operand 3 states and 160 transitions. [2024-11-09 10:50:44,405 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 107 transitions, 443 flow [2024-11-09 10:50:44,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 107 transitions, 440 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:50:44,408 INFO L231 Difference]: Finished difference. Result has 69 places, 76 transitions, 200 flow [2024-11-09 10:50:44,409 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=200, PETRI_PLACES=69, PETRI_TRANSITIONS=76} [2024-11-09 10:50:44,409 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, -8 predicate places. [2024-11-09 10:50:44,410 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 76 transitions, 200 flow [2024-11-09 10:50:44,410 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.333333333333332) internal successors, (76), 3 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:44,410 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:44,411 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:44,411 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-09 10:50:44,411 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-09 10:50:44,412 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:44,412 INFO L85 PathProgramCache]: Analyzing trace with hash -44025330, now seen corresponding path program 1 times [2024-11-09 10:50:44,412 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:44,412 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744089005] [2024-11-09 10:50:44,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:44,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:44,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:44,498 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:44,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:44,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744089005] [2024-11-09 10:50:44,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744089005] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:44,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:44,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:50:44,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44147847] [2024-11-09 10:50:44,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:44,500 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:50:44,501 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:44,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:50:44,502 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:50:44,503 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-09 10:50:44,506 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 76 transitions, 200 flow. Second operand has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:44,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:44,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-09 10:50:44,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:46,784 INFO L124 PetriNetUnfolderBase]: 19154/28485 cut-off events. [2024-11-09 10:50:46,784 INFO L125 PetriNetUnfolderBase]: For 5068/5232 co-relation queries the response was YES. [2024-11-09 10:50:46,836 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60717 conditions, 28485 events. 19154/28485 cut-off events. For 5068/5232 co-relation queries the response was YES. Maximal size of possible extension queue 1024. Compared 194819 event pairs, 7868 based on Foata normal form. 482/19458 useless extension candidates. Maximal degree in co-relation 13752. Up to 12927 conditions per place. [2024-11-09 10:50:46,947 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 96 selfloop transitions, 2 changer transitions 0/116 dead transitions. [2024-11-09 10:50:46,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 116 transitions, 504 flow [2024-11-09 10:50:46,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:50:46,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:50:46,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 180 transitions. [2024-11-09 10:50:46,949 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6818181818181818 [2024-11-09 10:50:46,950 INFO L175 Difference]: Start difference. First operand has 69 places, 76 transitions, 200 flow. Second operand 3 states and 180 transitions. [2024-11-09 10:50:46,950 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 116 transitions, 504 flow [2024-11-09 10:50:46,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 116 transitions, 492 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:50:46,958 INFO L231 Difference]: Finished difference. Result has 70 places, 77 transitions, 208 flow [2024-11-09 10:50:46,959 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=192, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=208, PETRI_PLACES=70, PETRI_TRANSITIONS=77} [2024-11-09 10:50:46,959 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, -7 predicate places. [2024-11-09 10:50:46,960 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 77 transitions, 208 flow [2024-11-09 10:50:46,961 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.333333333333332) internal successors, (91), 3 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:46,961 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:46,961 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:46,961 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-09 10:50:46,961 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-09 10:50:46,961 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:46,962 INFO L85 PathProgramCache]: Analyzing trace with hash -1364783077, now seen corresponding path program 1 times [2024-11-09 10:50:46,962 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:46,962 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700878403] [2024-11-09 10:50:46,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:46,964 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:46,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:46,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:47,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:47,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700878403] [2024-11-09 10:50:47,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [700878403] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:47,000 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:47,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:50:47,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1793324312] [2024-11-09 10:50:47,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:47,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:50:47,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:47,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:50:47,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:50:47,010 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-11-09 10:50:47,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 77 transitions, 208 flow. Second operand has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:47,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:47,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-11-09 10:50:47,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:49,632 INFO L124 PetriNetUnfolderBase]: 23767/34263 cut-off events. [2024-11-09 10:50:49,632 INFO L125 PetriNetUnfolderBase]: For 4421/4835 co-relation queries the response was YES. [2024-11-09 10:50:49,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 73027 conditions, 34263 events. 23767/34263 cut-off events. For 4421/4835 co-relation queries the response was YES. Maximal size of possible extension queue 1488. Compared 225567 event pairs, 11883 based on Foata normal form. 0/23383 useless extension candidates. Maximal degree in co-relation 22410. Up to 20195 conditions per place. [2024-11-09 10:50:49,824 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 93 selfloop transitions, 4 changer transitions 0/112 dead transitions. [2024-11-09 10:50:49,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 112 transitions, 493 flow [2024-11-09 10:50:49,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:50:49,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:50:49,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2024-11-09 10:50:49,825 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-11-09 10:50:49,825 INFO L175 Difference]: Start difference. First operand has 70 places, 77 transitions, 208 flow. Second operand 3 states and 168 transitions. [2024-11-09 10:50:49,826 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 112 transitions, 493 flow [2024-11-09 10:50:49,829 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 112 transitions, 491 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:50:49,830 INFO L231 Difference]: Finished difference. Result has 73 places, 77 transitions, 224 flow [2024-11-09 10:50:49,830 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=202, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=224, PETRI_PLACES=73, PETRI_TRANSITIONS=77} [2024-11-09 10:50:49,833 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, -4 predicate places. [2024-11-09 10:50:49,833 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 77 transitions, 224 flow [2024-11-09 10:50:49,833 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.0) internal successors, (84), 3 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:49,833 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:49,833 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:49,833 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 10:50:49,834 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-09 10:50:49,834 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:49,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1679102784, now seen corresponding path program 1 times [2024-11-09 10:50:49,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:49,834 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961490370] [2024-11-09 10:50:49,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:49,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:49,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:49,927 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:49,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:49,928 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961490370] [2024-11-09 10:50:49,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [961490370] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:49,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:49,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:50:49,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623602558] [2024-11-09 10:50:49,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:49,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:50:49,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:49,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:50:49,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:50:49,941 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-09 10:50:49,942 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 77 transitions, 224 flow. Second operand has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:49,942 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:49,942 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-09 10:50:49,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:53,011 INFO L124 PetriNetUnfolderBase]: 21337/31707 cut-off events. [2024-11-09 10:50:53,012 INFO L125 PetriNetUnfolderBase]: For 9213/9915 co-relation queries the response was YES. [2024-11-09 10:50:53,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70126 conditions, 31707 events. 21337/31707 cut-off events. For 9213/9915 co-relation queries the response was YES. Maximal size of possible extension queue 1376. Compared 214214 event pairs, 16426 based on Foata normal form. 112/21788 useless extension candidates. Maximal degree in co-relation 42064. Up to 26815 conditions per place. [2024-11-09 10:50:53,249 INFO L140 encePairwiseOnDemand]: 76/88 looper letters, 87 selfloop transitions, 9 changer transitions 0/115 dead transitions. [2024-11-09 10:50:53,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 115 transitions, 498 flow [2024-11-09 10:50:53,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:50:53,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:50:53,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 232 transitions. [2024-11-09 10:50:53,256 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5272727272727272 [2024-11-09 10:50:53,257 INFO L175 Difference]: Start difference. First operand has 73 places, 77 transitions, 224 flow. Second operand 5 states and 232 transitions. [2024-11-09 10:50:53,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 115 transitions, 498 flow [2024-11-09 10:50:53,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 115 transitions, 490 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:50:53,275 INFO L231 Difference]: Finished difference. Result has 78 places, 85 transitions, 288 flow [2024-11-09 10:50:53,276 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=216, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=288, PETRI_PLACES=78, PETRI_TRANSITIONS=85} [2024-11-09 10:50:53,276 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2024-11-09 10:50:53,276 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 85 transitions, 288 flow [2024-11-09 10:50:53,277 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 30.0) internal successors, (120), 4 states have internal predecessors, (120), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:53,277 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:53,277 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:53,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 10:50:53,277 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-09 10:50:53,278 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:53,278 INFO L85 PathProgramCache]: Analyzing trace with hash -512576584, now seen corresponding path program 1 times [2024-11-09 10:50:53,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:53,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [436819359] [2024-11-09 10:50:53,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:53,279 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:53,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:53,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:53,327 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:53,327 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [436819359] [2024-11-09 10:50:53,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [436819359] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:53,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:53,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:50:53,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917637444] [2024-11-09 10:50:53,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:53,329 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:50:53,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:53,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:50:53,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:50:53,334 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-11-09 10:50:53,335 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 85 transitions, 288 flow. Second operand has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:53,335 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:53,335 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-11-09 10:50:53,335 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:57,476 INFO L124 PetriNetUnfolderBase]: 37217/53359 cut-off events. [2024-11-09 10:50:57,476 INFO L125 PetriNetUnfolderBase]: For 12551/13735 co-relation queries the response was YES. [2024-11-09 10:50:57,655 INFO L83 FinitePrefix]: Finished finitePrefix Result has 119793 conditions, 53359 events. 37217/53359 cut-off events. For 12551/13735 co-relation queries the response was YES. Maximal size of possible extension queue 2196. Compared 356765 event pairs, 21948 based on Foata normal form. 0/36552 useless extension candidates. Maximal degree in co-relation 117430. Up to 24963 conditions per place. [2024-11-09 10:50:57,825 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 101 selfloop transitions, 5 changer transitions 0/122 dead transitions. [2024-11-09 10:50:57,825 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 122 transitions, 609 flow [2024-11-09 10:50:57,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:50:57,829 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:50:57,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2024-11-09 10:50:57,830 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6363636363636364 [2024-11-09 10:50:57,830 INFO L175 Difference]: Start difference. First operand has 78 places, 85 transitions, 288 flow. Second operand 3 states and 168 transitions. [2024-11-09 10:50:57,830 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 122 transitions, 609 flow [2024-11-09 10:50:57,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 122 transitions, 607 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:50:57,842 INFO L231 Difference]: Finished difference. Result has 81 places, 86 transitions, 312 flow [2024-11-09 10:50:57,842 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=286, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=312, PETRI_PLACES=81, PETRI_TRANSITIONS=86} [2024-11-09 10:50:57,842 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, 4 predicate places. [2024-11-09 10:50:57,843 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 86 transitions, 312 flow [2024-11-09 10:50:57,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 28.666666666666668) internal successors, (86), 3 states have internal predecessors, (86), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:57,843 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:57,843 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:57,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-09 10:50:57,843 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-09 10:50:57,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:57,844 INFO L85 PathProgramCache]: Analyzing trace with hash -1715582745, now seen corresponding path program 1 times [2024-11-09 10:50:57,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:57,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697430077] [2024-11-09 10:50:57,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:57,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:57,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:58,174 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:58,178 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:58,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697430077] [2024-11-09 10:50:58,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1697430077] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:58,178 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [311208669] [2024-11-09 10:50:58,179 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:58,179 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:58,179 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:58,181 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:50:58,187 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:50:58,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:58,366 INFO L255 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-09 10:50:58,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:58,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:50:58,606 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:50:58,608 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-09 10:50:58,652 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-09 10:50:58,653 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-09 10:50:58,706 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:50:58,707 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-09 10:50:58,717 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:50:58,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:50:58,810 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:58,810 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:50:58,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [311208669] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:58,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:50:58,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-11-09 10:50:58,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575579697] [2024-11-09 10:50:58,815 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:58,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-09 10:50:58,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:58,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-09 10:50:58,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:50:58,864 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-11-09 10:50:58,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 86 transitions, 312 flow. Second operand has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:58,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:58,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-11-09 10:50:58,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:01,673 INFO L124 PetriNetUnfolderBase]: 18923/28889 cut-off events. [2024-11-09 10:51:01,673 INFO L125 PetriNetUnfolderBase]: For 11699/12947 co-relation queries the response was YES. [2024-11-09 10:51:01,806 INFO L83 FinitePrefix]: Finished finitePrefix Result has 64345 conditions, 28889 events. 18923/28889 cut-off events. For 11699/12947 co-relation queries the response was YES. Maximal size of possible extension queue 1021. Compared 197306 event pairs, 14916 based on Foata normal form. 1455/22700 useless extension candidates. Maximal degree in co-relation 62214. Up to 25014 conditions per place. [2024-11-09 10:51:01,920 INFO L140 encePairwiseOnDemand]: 78/88 looper letters, 55 selfloop transitions, 3 changer transitions 0/78 dead transitions. [2024-11-09 10:51:01,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 78 transitions, 400 flow [2024-11-09 10:51:01,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:51:01,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:51:01,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 152 transitions. [2024-11-09 10:51:01,922 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4318181818181818 [2024-11-09 10:51:01,922 INFO L175 Difference]: Start difference. First operand has 81 places, 86 transitions, 312 flow. Second operand 4 states and 152 transitions. [2024-11-09 10:51:01,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 78 transitions, 400 flow [2024-11-09 10:51:01,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 78 transitions, 390 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:51:01,936 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 280 flow [2024-11-09 10:51:01,937 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=274, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=280, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-11-09 10:51:01,937 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, -3 predicate places. [2024-11-09 10:51:01,938 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 280 flow [2024-11-09 10:51:01,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 26.333333333333332) internal successors, (158), 6 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:01,938 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:01,938 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:01,957 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:51:02,142 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:02,143 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread3Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-09 10:51:02,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:02,144 INFO L85 PathProgramCache]: Analyzing trace with hash 1955715499, now seen corresponding path program 1 times [2024-11-09 10:51:02,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:02,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641549824] [2024-11-09 10:51:02,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:02,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:02,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:02,216 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:02,216 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:02,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641549824] [2024-11-09 10:51:02,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641549824] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:51:02,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:51:02,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:51:02,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647275016] [2024-11-09 10:51:02,217 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:51:02,217 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:51:02,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:02,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:51:02,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:51:02,218 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-09 10:51:02,218 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 280 flow. Second operand has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:02,218 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:02,219 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-09 10:51:02,219 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:05,160 INFO L124 PetriNetUnfolderBase]: 24419/36130 cut-off events. [2024-11-09 10:51:05,161 INFO L125 PetriNetUnfolderBase]: For 12519/14800 co-relation queries the response was YES. [2024-11-09 10:51:05,278 INFO L83 FinitePrefix]: Finished finitePrefix Result has 81493 conditions, 36130 events. 24419/36130 cut-off events. For 12519/14800 co-relation queries the response was YES. Maximal size of possible extension queue 1039. Compared 232140 event pairs, 8589 based on Foata normal form. 732/28072 useless extension candidates. Maximal degree in co-relation 79360. Up to 23607 conditions per place. [2024-11-09 10:51:05,392 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 87 selfloop transitions, 2 changer transitions 0/109 dead transitions. [2024-11-09 10:51:05,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 109 transitions, 551 flow [2024-11-09 10:51:05,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:51:05,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:51:05,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 162 transitions. [2024-11-09 10:51:05,394 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6136363636363636 [2024-11-09 10:51:05,394 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 280 flow. Second operand 3 states and 162 transitions. [2024-11-09 10:51:05,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 109 transitions, 551 flow [2024-11-09 10:51:05,403 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 109 transitions, 547 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:51:05,404 INFO L231 Difference]: Finished difference. Result has 75 places, 79 transitions, 294 flow [2024-11-09 10:51:05,404 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=276, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=294, PETRI_PLACES=75, PETRI_TRANSITIONS=79} [2024-11-09 10:51:05,405 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, -2 predicate places. [2024-11-09 10:51:05,405 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 79 transitions, 294 flow [2024-11-09 10:51:05,405 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 32.0) internal successors, (96), 3 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:05,405 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:05,405 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:05,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 10:51:05,406 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-09 10:51:05,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:05,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1320314508, now seen corresponding path program 1 times [2024-11-09 10:51:05,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:05,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [946273909] [2024-11-09 10:51:05,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:05,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:05,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:05,465 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:05,466 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:05,466 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [946273909] [2024-11-09 10:51:05,466 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [946273909] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:51:05,466 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:51:05,466 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:51:05,466 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [225756497] [2024-11-09 10:51:05,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:51:05,467 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:51:05,467 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:05,467 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:51:05,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:51:05,468 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-09 10:51:05,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 79 transitions, 294 flow. Second operand has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:05,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:05,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-09 10:51:05,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:08,002 INFO L124 PetriNetUnfolderBase]: 24429/36202 cut-off events. [2024-11-09 10:51:08,002 INFO L125 PetriNetUnfolderBase]: For 14915/17214 co-relation queries the response was YES. [2024-11-09 10:51:08,152 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84057 conditions, 36202 events. 24429/36202 cut-off events. For 14915/17214 co-relation queries the response was YES. Maximal size of possible extension queue 1100. Compared 233589 event pairs, 8400 based on Foata normal form. 3/27329 useless extension candidates. Maximal degree in co-relation 81926. Up to 29833 conditions per place. [2024-11-09 10:51:08,278 INFO L140 encePairwiseOnDemand]: 85/88 looper letters, 64 selfloop transitions, 2 changer transitions 11/97 dead transitions. [2024-11-09 10:51:08,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 97 transitions, 495 flow [2024-11-09 10:51:08,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:51:08,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:51:08,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 148 transitions. [2024-11-09 10:51:08,280 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5606060606060606 [2024-11-09 10:51:08,280 INFO L175 Difference]: Start difference. First operand has 75 places, 79 transitions, 294 flow. Second operand 3 states and 148 transitions. [2024-11-09 10:51:08,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 97 transitions, 495 flow [2024-11-09 10:51:08,295 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 97 transitions, 493 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:51:08,296 INFO L231 Difference]: Finished difference. Result has 77 places, 73 transitions, 265 flow [2024-11-09 10:51:08,297 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=292, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=77, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=265, PETRI_PLACES=77, PETRI_TRANSITIONS=73} [2024-11-09 10:51:08,297 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, 0 predicate places. [2024-11-09 10:51:08,297 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 73 transitions, 265 flow [2024-11-09 10:51:08,297 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 34.666666666666664) internal successors, (104), 3 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:08,298 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:08,298 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:08,298 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 10:51:08,298 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-09 10:51:08,298 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:08,298 INFO L85 PathProgramCache]: Analyzing trace with hash -2145555606, now seen corresponding path program 1 times [2024-11-09 10:51:08,298 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:08,298 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [847775203] [2024-11-09 10:51:08,298 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:08,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:08,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:08,359 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:08,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:08,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [847775203] [2024-11-09 10:51:08,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [847775203] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:51:08,360 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:51:08,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:51:08,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1392834526] [2024-11-09 10:51:08,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:51:08,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:51:08,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:08,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:51:08,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:51:08,379 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 88 [2024-11-09 10:51:08,380 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 73 transitions, 265 flow. Second operand has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:08,380 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:08,380 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 88 [2024-11-09 10:51:08,380 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:10,346 INFO L124 PetriNetUnfolderBase]: 20685/30926 cut-off events. [2024-11-09 10:51:10,346 INFO L125 PetriNetUnfolderBase]: For 16155/18180 co-relation queries the response was YES. [2024-11-09 10:51:10,481 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72002 conditions, 30926 events. 20685/30926 cut-off events. For 16155/18180 co-relation queries the response was YES. Maximal size of possible extension queue 966. Compared 202685 event pairs, 16143 based on Foata normal form. 0/24294 useless extension candidates. Maximal degree in co-relation 71965. Up to 27583 conditions per place. [2024-11-09 10:51:10,600 INFO L140 encePairwiseOnDemand]: 84/88 looper letters, 49 selfloop transitions, 2 changer transitions 0/71 dead transitions. [2024-11-09 10:51:10,600 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 71 transitions, 361 flow [2024-11-09 10:51:10,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:51:10,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:51:10,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 144 transitions. [2024-11-09 10:51:10,602 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4090909090909091 [2024-11-09 10:51:10,602 INFO L175 Difference]: Start difference. First operand has 77 places, 73 transitions, 265 flow. Second operand 4 states and 144 transitions. [2024-11-09 10:51:10,602 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 71 transitions, 361 flow [2024-11-09 10:51:10,613 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 71 transitions, 345 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-11-09 10:51:10,614 INFO L231 Difference]: Finished difference. Result has 73 places, 71 transitions, 247 flow [2024-11-09 10:51:10,615 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=243, 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=4, PETRI_FLOW=247, PETRI_PLACES=73, PETRI_TRANSITIONS=71} [2024-11-09 10:51:10,615 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, -4 predicate places. [2024-11-09 10:51:10,615 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 71 transitions, 247 flow [2024-11-09 10:51:10,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 28.5) internal successors, (114), 4 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:10,615 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:10,616 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:10,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 10:51:10,616 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-09 10:51:10,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:10,616 INFO L85 PathProgramCache]: Analyzing trace with hash -2145555605, now seen corresponding path program 1 times [2024-11-09 10:51:10,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:10,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417863551] [2024-11-09 10:51:10,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:10,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:10,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:10,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:10,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:10,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417863551] [2024-11-09 10:51:10,783 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417863551] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:51:10,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:51:10,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:51:10,784 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627383302] [2024-11-09 10:51:10,784 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:51:10,784 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:51:10,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:10,784 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:51:10,785 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:51:10,795 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-09 10:51:10,795 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 71 transitions, 247 flow. Second operand has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:10,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:10,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-09 10:51:10,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:13,941 INFO L124 PetriNetUnfolderBase]: 26934/40826 cut-off events. [2024-11-09 10:51:13,942 INFO L125 PetriNetUnfolderBase]: For 19842/22305 co-relation queries the response was YES. [2024-11-09 10:51:14,106 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93624 conditions, 40826 events. 26934/40826 cut-off events. For 19842/22305 co-relation queries the response was YES. Maximal size of possible extension queue 1105. Compared 278129 event pairs, 21455 based on Foata normal form. 340/32255 useless extension candidates. Maximal degree in co-relation 93588. Up to 27587 conditions per place. [2024-11-09 10:51:14,240 INFO L140 encePairwiseOnDemand]: 79/88 looper letters, 84 selfloop transitions, 8 changer transitions 0/112 dead transitions. [2024-11-09 10:51:14,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 112 transitions, 561 flow [2024-11-09 10:51:14,241 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:51:14,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:51:14,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 222 transitions. [2024-11-09 10:51:14,242 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5045454545454545 [2024-11-09 10:51:14,242 INFO L175 Difference]: Start difference. First operand has 73 places, 71 transitions, 247 flow. Second operand 5 states and 222 transitions. [2024-11-09 10:51:14,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 112 transitions, 561 flow [2024-11-09 10:51:14,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 112 transitions, 557 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:51:14,252 INFO L231 Difference]: Finished difference. Result has 78 places, 75 transitions, 293 flow [2024-11-09 10:51:14,253 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=244, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=293, PETRI_PLACES=78, PETRI_TRANSITIONS=75} [2024-11-09 10:51:14,253 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2024-11-09 10:51:14,253 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 75 transitions, 293 flow [2024-11-09 10:51:14,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 31.5) internal successors, (126), 4 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:14,254 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:14,254 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:14,254 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 10:51:14,254 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-09 10:51:14,254 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:14,254 INFO L85 PathProgramCache]: Analyzing trace with hash 354220263, now seen corresponding path program 1 times [2024-11-09 10:51:14,254 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:14,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912544246] [2024-11-09 10:51:14,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:14,255 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:14,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:14,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:14,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912544246] [2024-11-09 10:51:14,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912544246] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:14,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351654520] [2024-11-09 10:51:14,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:14,498 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:14,498 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:14,500 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:51:14,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:51:14,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:14,589 INFO L255 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-09 10:51:14,591 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:14,712 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:14,712 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:51:14,712 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351654520] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:51:14,712 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:51:14,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 7 [2024-11-09 10:51:14,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1318073854] [2024-11-09 10:51:14,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:51:14,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:51:14,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:14,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:51:14,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-09 10:51:14,738 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-09 10:51:14,739 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 75 transitions, 293 flow. Second operand has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:14,739 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:14,739 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-09 10:51:14,739 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:17,785 INFO L124 PetriNetUnfolderBase]: 24044/36887 cut-off events. [2024-11-09 10:51:17,785 INFO L125 PetriNetUnfolderBase]: For 19102/21335 co-relation queries the response was YES. [2024-11-09 10:51:17,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84134 conditions, 36887 events. 24044/36887 cut-off events. For 19102/21335 co-relation queries the response was YES. Maximal size of possible extension queue 996. Compared 251449 event pairs, 19339 based on Foata normal form. 1264/29817 useless extension candidates. Maximal degree in co-relation 84091. Up to 32427 conditions per place. [2024-11-09 10:51:18,045 INFO L140 encePairwiseOnDemand]: 82/88 looper letters, 47 selfloop transitions, 6 changer transitions 0/73 dead transitions. [2024-11-09 10:51:18,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 73 transitions, 391 flow [2024-11-09 10:51:18,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:51:18,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:51:18,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 154 transitions. [2024-11-09 10:51:18,050 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4375 [2024-11-09 10:51:18,051 INFO L175 Difference]: Start difference. First operand has 78 places, 75 transitions, 293 flow. Second operand 4 states and 154 transitions. [2024-11-09 10:51:18,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 73 transitions, 391 flow [2024-11-09 10:51:18,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 73 transitions, 389 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:51:18,075 INFO L231 Difference]: Finished difference. Result has 78 places, 73 transitions, 295 flow [2024-11-09 10:51:18,075 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=295, PETRI_PLACES=78, PETRI_TRANSITIONS=73} [2024-11-09 10:51:18,076 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, 1 predicate places. [2024-11-09 10:51:18,076 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 73 transitions, 295 flow [2024-11-09 10:51:18,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.0) internal successors, (155), 5 states have internal predecessors, (155), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:18,078 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:18,078 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:18,091 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-09 10:51:18,278 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-09 10:51:18,279 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-09 10:51:18,280 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:18,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1739790431, now seen corresponding path program 1 times [2024-11-09 10:51:18,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:18,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1013463092] [2024-11-09 10:51:18,280 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:18,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:18,294 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:18,315 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:51:18,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:18,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1013463092] [2024-11-09 10:51:18,315 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1013463092] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:51:18,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:51:18,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:51:18,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475710602] [2024-11-09 10:51:18,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:51:18,316 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:51:18,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:18,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:51:18,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:51:18,339 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 88 [2024-11-09 10:51:18,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 73 transitions, 295 flow. Second operand has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:18,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:18,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 88 [2024-11-09 10:51:18,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:21,045 INFO L124 PetriNetUnfolderBase]: 25569/37140 cut-off events. [2024-11-09 10:51:21,045 INFO L125 PetriNetUnfolderBase]: For 15418/17581 co-relation queries the response was YES. [2024-11-09 10:51:21,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 87071 conditions, 37140 events. 25569/37140 cut-off events. For 15418/17581 co-relation queries the response was YES. Maximal size of possible extension queue 666. Compared 217339 event pairs, 14545 based on Foata normal form. 440/31046 useless extension candidates. Maximal degree in co-relation 87026. Up to 24358 conditions per place. [2024-11-09 10:51:21,366 INFO L140 encePairwiseOnDemand]: 83/88 looper letters, 78 selfloop transitions, 5 changer transitions 0/97 dead transitions. [2024-11-09 10:51:21,366 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 97 transitions, 534 flow [2024-11-09 10:51:21,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:51:21,367 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:51:21,367 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 141 transitions. [2024-11-09 10:51:21,367 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5340909090909091 [2024-11-09 10:51:21,368 INFO L175 Difference]: Start difference. First operand has 78 places, 73 transitions, 295 flow. Second operand 3 states and 141 transitions. [2024-11-09 10:51:21,368 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 97 transitions, 534 flow [2024-11-09 10:51:21,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 97 transitions, 524 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:51:21,379 INFO L231 Difference]: Finished difference. Result has 80 places, 74 transitions, 313 flow [2024-11-09 10:51:21,379 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=285, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=313, PETRI_PLACES=80, PETRI_TRANSITIONS=74} [2024-11-09 10:51:21,380 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, 3 predicate places. [2024-11-09 10:51:21,380 INFO L471 AbstractCegarLoop]: Abstraction has has 80 places, 74 transitions, 313 flow [2024-11-09 10:51:21,380 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 29.666666666666668) internal successors, (89), 3 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:21,380 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:21,380 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:21,380 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-09 10:51:21,380 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-09 10:51:21,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:21,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1958201616, now seen corresponding path program 1 times [2024-11-09 10:51:21,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:21,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [326716712] [2024-11-09 10:51:21,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:21,382 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:21,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:21,428 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 7 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:51:21,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:21,428 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [326716712] [2024-11-09 10:51:21,428 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [326716712] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:51:21,428 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:51:21,428 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:51:21,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776993170] [2024-11-09 10:51:21,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:51:21,429 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:51:21,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:21,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:51:21,430 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:51:21,438 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 22 out of 88 [2024-11-09 10:51:21,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 74 transitions, 313 flow. Second operand has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:21,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:21,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 22 of 88 [2024-11-09 10:51:21,439 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:25,265 INFO L124 PetriNetUnfolderBase]: 30537/44707 cut-off events. [2024-11-09 10:51:25,266 INFO L125 PetriNetUnfolderBase]: For 25624/28658 co-relation queries the response was YES. [2024-11-09 10:51:25,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 107634 conditions, 44707 events. 30537/44707 cut-off events. For 25624/28658 co-relation queries the response was YES. Maximal size of possible extension queue 661. Compared 268955 event pairs, 19837 based on Foata normal form. 680/37616 useless extension candidates. Maximal degree in co-relation 107590. Up to 33291 conditions per place. [2024-11-09 10:51:25,559 INFO L140 encePairwiseOnDemand]: 82/88 looper letters, 80 selfloop transitions, 4 changer transitions 0/98 dead transitions. [2024-11-09 10:51:25,559 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 98 transitions, 554 flow [2024-11-09 10:51:25,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:51:25,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:51:25,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 142 transitions. [2024-11-09 10:51:25,560 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5378787878787878 [2024-11-09 10:51:25,560 INFO L175 Difference]: Start difference. First operand has 80 places, 74 transitions, 313 flow. Second operand 3 states and 142 transitions. [2024-11-09 10:51:25,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 98 transitions, 554 flow [2024-11-09 10:51:25,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 98 transitions, 544 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:51:25,576 INFO L231 Difference]: Finished difference. Result has 82 places, 75 transitions, 329 flow [2024-11-09 10:51:25,576 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=88, PETRI_DIFFERENCE_MINUEND_FLOW=303, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=329, PETRI_PLACES=82, PETRI_TRANSITIONS=75} [2024-11-09 10:51:25,577 INFO L277 CegarLoopForPetriNet]: 77 programPoint places, 5 predicate places. [2024-11-09 10:51:25,577 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 75 transitions, 329 flow [2024-11-09 10:51:25,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 31.0) internal successors, (93), 3 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:25,577 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:25,578 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:25,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-09 10:51:25,578 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 40 more)] === [2024-11-09 10:51:25,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:25,578 INFO L85 PathProgramCache]: Analyzing trace with hash 30135136, now seen corresponding path program 1 times [2024-11-09 10:51:25,578 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:25,578 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969938861] [2024-11-09 10:51:25,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:25,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:25,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:25,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:25,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969938861] [2024-11-09 10:51:25,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [969938861] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:25,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [164943449] [2024-11-09 10:51:25,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:25,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:25,851 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:25,852 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:51:25,857 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:51:25,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:25,937 INFO L255 TraceCheckSpWp]: Trace formula consists of 275 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-09 10:51:25,939 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:25,974 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-09 10:51:26,168 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:26,168 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:26,534 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-09 10:51:26,547 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-09 10:51:26,547 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 110 treesize of output 89 [2024-11-09 10:51:26,600 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:26,600 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [164943449] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:26,600 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:26,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 8, 8] total 20 [2024-11-09 10:51:26,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1378392168] [2024-11-09 10:51:26,601 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:26,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-09 10:51:26,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:26,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-09 10:51:26,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2024-11-09 10:51:26,768 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 27 out of 88 [2024-11-09 10:51:26,769 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 75 transitions, 329 flow. Second operand has 21 states, 21 states have (on average 31.428571428571427) internal successors, (660), 21 states have internal predecessors, (660), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:26,769 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:26,769 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 27 of 88 [2024-11-09 10:51:26,769 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand