./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc 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-three-array-min.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 632917bb2a5e88c193ba7761220e89039206b92cb89d98172ae8e9ad69d27ca8 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:54:42,761 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:54:42,846 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:54:42,854 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:54:42,854 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:54:42,884 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:54:42,885 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:54:42,885 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:54:42,886 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:54:42,888 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:54:42,888 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:54:42,889 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:54:42,889 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:54:42,889 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:54:42,890 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:54:42,890 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:54:42,890 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:54:42,890 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:54:42,891 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:54:42,891 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:54:42,895 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:54:42,896 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:54:42,896 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:54:42,896 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:54:42,896 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:54:42,897 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:54:42,897 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:54:42,897 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:54:42,897 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:54:42,897 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:54:42,898 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:54:42,898 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:54:42,898 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:54:42,898 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:54:42,899 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:54:42,899 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:54:42,899 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:54:42,901 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:54:42,901 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:54:42,901 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:54:42,901 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:54:42,902 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:54:42,902 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 632917bb2a5e88c193ba7761220e89039206b92cb89d98172ae8e9ad69d27ca8 [2024-11-19 09:54:43,144 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:54:43,167 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:54:43,170 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:54:43,171 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:54:43,172 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:54:43,173 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2024-11-19 09:54:44,695 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:54:44,890 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:54:44,890 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2024-11-19 09:54:44,898 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7a1be91a/ff4cd0f3432f4885b71c179ac378136d/FLAGe6ac45870 [2024-11-19 09:54:44,910 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d7a1be91a/ff4cd0f3432f4885b71c179ac378136d [2024-11-19 09:54:44,912 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:54:44,913 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:54:44,914 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:54:44,915 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:54:44,920 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:54:44,921 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:54:44" (1/1) ... [2024-11-19 09:54:44,921 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2796eaf2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:44, skipping insertion in model container [2024-11-19 09:54:44,922 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:54:44" (1/1) ... [2024-11-19 09:54:44,943 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:54:45,159 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:54:45,165 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:54:45,173 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:54:45,199 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:54:45,217 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:54:45,217 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45 WrapperNode [2024-11-19 09:54:45,217 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:54:45,219 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:54:45,219 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:54:45,219 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:54:45,226 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,235 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,260 INFO L138 Inliner]: procedures = 25, calls = 43, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 224 [2024-11-19 09:54:45,261 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:54:45,262 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:54:45,262 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:54:45,262 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:54:45,276 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,281 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,286 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,309 INFO L175 MemorySlicer]: Split 18 memory accesses to 2 slices as follows [2, 16]. 89 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 4 writes are split as follows [0, 4]. [2024-11-19 09:54:45,310 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,310 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,319 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,326 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,329 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,335 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,338 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:54:45,339 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:54:45,339 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:54:45,340 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:54:45,341 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (1/1) ... [2024-11-19 09:54:45,353 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:54:45,366 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:54:45,380 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) [2024-11-19 09:54:45,383 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 [2024-11-19 09:54:45,418 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:54:45,419 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:54:45,419 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:54:45,419 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:54:45,419 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:54:45,419 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 09:54:45,419 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 09:54:45,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:54:45,419 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:54:45,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:54:45,420 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:54:45,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-19 09:54:45,420 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-19 09:54:45,420 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:54:45,420 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:54:45,420 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:54:45,420 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:54:45,421 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:54:45,422 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:54:45,529 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:54:45,531 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:54:46,088 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:54:46,089 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:54:46,486 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:54:46,487 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-19 09:54:46,487 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:54:46 BoogieIcfgContainer [2024-11-19 09:54:46,488 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:54:46,490 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:54:46,491 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:54:46,494 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:54:46,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:54:44" (1/3) ... [2024-11-19 09:54:46,496 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24de3ee6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:54:46, skipping insertion in model container [2024-11-19 09:54:46,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:54:45" (2/3) ... [2024-11-19 09:54:46,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@24de3ee6 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:54:46, skipping insertion in model container [2024-11-19 09:54:46,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:54:46" (3/3) ... [2024-11-19 09:54:46,499 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-min.wvr.c [2024-11-19 09:54:46,519 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:54:46,520 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-11-19 09:54:46,520 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:54:46,607 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-19 09:54:46,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 199 flow [2024-11-19 09:54:46,698 INFO L124 PetriNetUnfolderBase]: 9/86 cut-off events. [2024-11-19 09:54:46,699 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-19 09:54:46,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 99 conditions, 86 events. 9/86 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 15. Compared 235 event pairs, 0 based on Foata normal form. 0/43 useless extension candidates. Maximal degree in co-relation 67. Up to 2 conditions per place. [2024-11-19 09:54:46,706 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 199 flow [2024-11-19 09:54:46,711 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 85 transitions, 188 flow [2024-11-19 09:54:46,726 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:54:46,735 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;@5169e08c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:54:46,735 INFO L334 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2024-11-19 09:54:46,739 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:54:46,739 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:54:46,740 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:54:46,740 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:46,741 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:54:46,741 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:54:46,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:46,748 INFO L85 PathProgramCache]: Analyzing trace with hash 904789, now seen corresponding path program 1 times [2024-11-19 09:54:46,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:46,759 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524097670] [2024-11-19 09:54:46,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:46,759 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:46,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:47,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:47,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:47,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524097670] [2024-11-19 09:54:47,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524097670] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:47,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:54:47,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:54:47,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95517353] [2024-11-19 09:54:47,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:47,049 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:54:47,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:47,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:54:47,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:54:47,149 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-19 09:54:47,152 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 85 transitions, 188 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:47,153 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:47,153 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-19 09:54:47,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:47,844 INFO L124 PetriNetUnfolderBase]: 2958/4632 cut-off events. [2024-11-19 09:54:47,845 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-11-19 09:54:47,862 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8752 conditions, 4632 events. 2958/4632 cut-off events. For 178/178 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29802 event pairs, 2134 based on Foata normal form. 1/3242 useless extension candidates. Maximal degree in co-relation 8216. Up to 3883 conditions per place. [2024-11-19 09:54:47,894 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 46 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2024-11-19 09:54:47,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 270 flow [2024-11-19 09:54:47,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:54:47,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:54:47,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2024-11-19 09:54:47,909 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5842696629213483 [2024-11-19 09:54:47,911 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 188 flow. Second operand 3 states and 156 transitions. [2024-11-19 09:54:47,912 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 270 flow [2024-11-19 09:54:47,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 258 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:54:47,930 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 166 flow [2024-11-19 09:54:47,933 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=166, PETRI_PLACES=75, PETRI_TRANSITIONS=78} [2024-11-19 09:54:47,937 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -11 predicate places. [2024-11-19 09:54:47,939 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 166 flow [2024-11-19 09:54:47,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:47,940 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:47,941 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:54:47,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:54:47,941 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:54:47,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:47,942 INFO L85 PathProgramCache]: Analyzing trace with hash 904790, now seen corresponding path program 1 times [2024-11-19 09:54:47,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:47,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637603659] [2024-11-19 09:54:47,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:47,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:47,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:48,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:48,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:48,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637603659] [2024-11-19 09:54:48,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637603659] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:48,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:54:48,336 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:54:48,337 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628099469] [2024-11-19 09:54:48,337 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:48,338 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:54:48,338 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:48,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:54:48,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:54:48,392 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-19 09:54:48,392 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 75 places, 78 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:48,393 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:48,393 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-19 09:54:48,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:48,897 INFO L124 PetriNetUnfolderBase]: 2958/4634 cut-off events. [2024-11-19 09:54:48,897 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-19 09:54:48,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8613 conditions, 4634 events. 2958/4634 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29796 event pairs, 2134 based on Foata normal form. 0/3241 useless extension candidates. Maximal degree in co-relation 8578. Up to 3895 conditions per place. [2024-11-19 09:54:48,933 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 51 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2024-11-19 09:54:48,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 276 flow [2024-11-19 09:54:48,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:54:48,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:54:48,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2024-11-19 09:54:48,939 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5880149812734082 [2024-11-19 09:54:48,939 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 166 flow. Second operand 3 states and 157 transitions. [2024-11-19 09:54:48,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 276 flow [2024-11-19 09:54:48,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 80 transitions, 272 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:54:48,942 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 176 flow [2024-11-19 09:54:48,942 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=73, 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=176, PETRI_PLACES=76, PETRI_TRANSITIONS=79} [2024-11-19 09:54:48,943 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -10 predicate places. [2024-11-19 09:54:48,944 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 176 flow [2024-11-19 09:54:48,944 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 34.75) internal successors, (139), 4 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:54:48,944 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:48,945 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:54:48,945 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:54:48,946 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:54:48,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:48,947 INFO L85 PathProgramCache]: Analyzing trace with hash 869532509, now seen corresponding path program 1 times [2024-11-19 09:54:48,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:48,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [578951914] [2024-11-19 09:54:48,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:48,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:48,974 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:49,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:49,249 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:49,249 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [578951914] [2024-11-19 09:54:49,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [578951914] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:54:49,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791833135] [2024-11-19 09:54:49,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:49,251 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:49,251 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:54:49,254 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) [2024-11-19 09:54:49,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:54:49,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:49,337 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:54:49,342 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:54:49,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-19 09:54:49,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:49,601 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:54:49,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:49,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1791833135] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:54:49,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:54:49,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:54:49,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302637160] [2024-11-19 09:54:49,721 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:54:49,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:54:49,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:49,722 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:54:49,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:54:50,165 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-19 09:54:50,166 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 79 transitions, 176 flow. Second operand has 11 states, 11 states have (on average 35.36363636363637) internal successors, (389), 11 states have internal predecessors, (389), 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) [2024-11-19 09:54:50,166 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:50,166 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-19 09:54:50,166 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:50,835 INFO L124 PetriNetUnfolderBase]: 2958/4633 cut-off events. [2024-11-19 09:54:50,835 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-19 09:54:50,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8615 conditions, 4633 events. 2958/4633 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29832 event pairs, 2134 based on Foata normal form. 0/3241 useless extension candidates. Maximal degree in co-relation 8602. Up to 3891 conditions per place. [2024-11-19 09:54:50,917 INFO L140 encePairwiseOnDemand]: 84/89 looper letters, 47 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2024-11-19 09:54:50,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 79 transitions, 278 flow [2024-11-19 09:54:50,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:54:50,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:54:50,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 223 transitions. [2024-11-19 09:54:50,919 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.501123595505618 [2024-11-19 09:54:50,919 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 176 flow. Second operand 5 states and 223 transitions. [2024-11-19 09:54:50,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 79 transitions, 278 flow [2024-11-19 09:54:50,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 79 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:54:50,921 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 188 flow [2024-11-19 09:54:50,921 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=188, PETRI_PLACES=79, PETRI_TRANSITIONS=79} [2024-11-19 09:54:50,922 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -7 predicate places. [2024-11-19 09:54:50,922 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 188 flow [2024-11-19 09:54:50,923 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 35.36363636363637) internal successors, (389), 11 states have internal predecessors, (389), 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) [2024-11-19 09:54:50,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:50,923 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-19 09:54:50,941 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-19 09:54:51,127 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:51,128 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:54:51,128 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:51,129 INFO L85 PathProgramCache]: Analyzing trace with hash 1185706500, now seen corresponding path program 1 times [2024-11-19 09:54:51,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:51,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1901783798] [2024-11-19 09:54:51,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:51,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:51,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:51,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:51,307 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:51,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1901783798] [2024-11-19 09:54:51,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1901783798] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:54:51,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984869139] [2024-11-19 09:54:51,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:51,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:51,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:54:51,310 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) [2024-11-19 09:54:51,312 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:54:51,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:51,379 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:54:51,380 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:54:51,392 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:54:51,498 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:54:51,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-19 09:54:51,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:51,529 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:54:51,592 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:51,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1984869139] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:54:51,594 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:54:51,594 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 9 [2024-11-19 09:54:51,594 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [715513945] [2024-11-19 09:54:51,594 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:51,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:54:51,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:51,595 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:54:51,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:54:51,685 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-19 09:54:51,686 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 79 transitions, 188 flow. Second operand has 5 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 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) [2024-11-19 09:54:51,686 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:51,686 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-19 09:54:51,687 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:52,193 INFO L124 PetriNetUnfolderBase]: 2960/4639 cut-off events. [2024-11-19 09:54:52,194 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-11-19 09:54:52,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8635 conditions, 4639 events. 2960/4639 cut-off events. For 52/52 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29794 event pairs, 2134 based on Foata normal form. 0/3245 useless extension candidates. Maximal degree in co-relation 8606. Up to 3894 conditions per place. [2024-11-19 09:54:52,229 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 51 selfloop transitions, 7 changer transitions 0/85 dead transitions. [2024-11-19 09:54:52,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 85 transitions, 316 flow [2024-11-19 09:54:52,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:54:52,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:54:52,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-11-19 09:54:52,231 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.550561797752809 [2024-11-19 09:54:52,231 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 188 flow. Second operand 4 states and 196 transitions. [2024-11-19 09:54:52,231 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 85 transitions, 316 flow [2024-11-19 09:54:52,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 306 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-19 09:54:52,233 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 225 flow [2024-11-19 09:54:52,234 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=225, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2024-11-19 09:54:52,234 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2024-11-19 09:54:52,235 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 225 flow [2024-11-19 09:54:52,235 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 35.2) internal successors, (176), 5 states have internal predecessors, (176), 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) [2024-11-19 09:54:52,235 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:52,235 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:52,252 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-19 09:54:52,439 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,SelfDestructingSolverStorable3 [2024-11-19 09:54:52,440 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:54:52,440 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:52,440 INFO L85 PathProgramCache]: Analyzing trace with hash -1897801947, now seen corresponding path program 1 times [2024-11-19 09:54:52,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:52,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1056804584] [2024-11-19 09:54:52,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:52,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:52,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:52,500 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:54:52,501 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:52,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1056804584] [2024-11-19 09:54:52,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1056804584] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:52,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:54:52,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:54:52,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813748348] [2024-11-19 09:54:52,502 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:52,502 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:54:52,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:52,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:54:52,503 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:54:52,518 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-19 09:54:52,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 225 flow. Second operand has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2024-11-19 09:54:52,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:52,519 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-19 09:54:52,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:52,897 INFO L124 PetriNetUnfolderBase]: 2958/4637 cut-off events. [2024-11-19 09:54:52,897 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-19 09:54:52,905 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8641 conditions, 4637 events. 2958/4637 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 348. Compared 29836 event pairs, 2134 based on Foata normal form. 2/3251 useless extension candidates. Maximal degree in co-relation 8611. Up to 3891 conditions per place. [2024-11-19 09:54:52,922 INFO L140 encePairwiseOnDemand]: 82/89 looper letters, 48 selfloop transitions, 6 changer transitions 0/83 dead transitions. [2024-11-19 09:54:52,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 327 flow [2024-11-19 09:54:52,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:54:52,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:54:52,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 204 transitions. [2024-11-19 09:54:52,924 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5730337078651685 [2024-11-19 09:54:52,924 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 225 flow. Second operand 4 states and 204 transitions. [2024-11-19 09:54:52,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 327 flow [2024-11-19 09:54:52,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 321 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:54:52,926 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 221 flow [2024-11-19 09:54:52,927 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=221, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2024-11-19 09:54:52,927 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -4 predicate places. [2024-11-19 09:54:52,927 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 221 flow [2024-11-19 09:54:52,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 38.5) internal successors, (154), 4 states have internal predecessors, (154), 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) [2024-11-19 09:54:52,928 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:52,928 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:52,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 09:54:52,928 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:54:52,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:52,929 INFO L85 PathProgramCache]: Analyzing trace with hash 1297642248, now seen corresponding path program 1 times [2024-11-19 09:54:52,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:52,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [458740180] [2024-11-19 09:54:52,930 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:52,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:52,940 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:53,026 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:53,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:53,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [458740180] [2024-11-19 09:54:53,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [458740180] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:54:53,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [565881034] [2024-11-19 09:54:53,027 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:53,027 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:53,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:54:53,031 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) [2024-11-19 09:54:53,032 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:54:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:53,103 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-19 09:54:53,104 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:54:53,164 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:53,165 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:54:53,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:53,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [565881034] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:54:53,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:54:53,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-19 09:54:53,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323150884] [2024-11-19 09:54:53,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:54:53,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-19 09:54:53,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:53,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-19 09:54:53,227 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-19 09:54:53,329 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-19 09:54:53,330 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 221 flow. Second operand has 13 states, 13 states have (on average 38.53846153846154) internal successors, (501), 13 states have internal predecessors, (501), 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) [2024-11-19 09:54:53,330 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:53,330 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-19 09:54:53,330 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:54,305 INFO L124 PetriNetUnfolderBase]: 5915/9273 cut-off events. [2024-11-19 09:54:54,306 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2024-11-19 09:54:54,321 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17276 conditions, 9273 events. 5915/9273 cut-off events. For 113/113 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 63983 event pairs, 4268 based on Foata normal form. 2/6508 useless extension candidates. Maximal degree in co-relation 8634. Up to 3889 conditions per place. [2024-11-19 09:54:54,351 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 85 selfloop transitions, 22 changer transitions 0/136 dead transitions. [2024-11-19 09:54:54,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 136 transitions, 592 flow [2024-11-19 09:54:54,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:54:54,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:54:54,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 405 transitions. [2024-11-19 09:54:54,354 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5688202247191011 [2024-11-19 09:54:54,354 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 221 flow. Second operand 8 states and 405 transitions. [2024-11-19 09:54:54,354 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 136 transitions, 592 flow [2024-11-19 09:54:54,355 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 136 transitions, 570 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:54:54,357 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 338 flow [2024-11-19 09:54:54,357 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=209, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=338, PETRI_PLACES=88, PETRI_TRANSITIONS=94} [2024-11-19 09:54:54,358 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2024-11-19 09:54:54,358 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 338 flow [2024-11-19 09:54:54,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 38.53846153846154) internal successors, (501), 13 states have internal predecessors, (501), 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) [2024-11-19 09:54:54,359 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:54,359 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-19 09:54:54,377 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:54:54,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:54,563 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:54:54,563 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:54,563 INFO L85 PathProgramCache]: Analyzing trace with hash 35474017, now seen corresponding path program 2 times [2024-11-19 09:54:54,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:54,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291147815] [2024-11-19 09:54:54,563 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:54:54,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:54,582 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:54:54,583 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:54:54,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:54,800 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:54,800 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291147815] [2024-11-19 09:54:54,800 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291147815] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:54:54,801 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490700299] [2024-11-19 09:54:54,801 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:54:54,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:54,801 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:54:54,803 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:54:54,805 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:54:54,881 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:54:54,881 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:54:54,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-19 09:54:54,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:54:54,895 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:54:55,022 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:54:55,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 27 [2024-11-19 09:54:55,087 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:55,088 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:54:55,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:54:55,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490700299] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:54:55,228 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:54:55,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-19 09:54:55,229 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043828725] [2024-11-19 09:54:55,229 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:54:55,229 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-19 09:54:55,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:55,230 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-19 09:54:55,230 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-19 09:54:56,219 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-19 09:54:56,220 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 94 transitions, 338 flow. Second operand has 18 states, 18 states have (on average 35.666666666666664) internal successors, (642), 18 states have internal predecessors, (642), 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) [2024-11-19 09:54:56,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:56,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-19 09:54:56,221 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:54:58,469 INFO L124 PetriNetUnfolderBase]: 8876/13921 cut-off events. [2024-11-19 09:54:58,472 INFO L125 PetriNetUnfolderBase]: For 173/173 co-relation queries the response was YES. [2024-11-19 09:54:58,501 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26017 conditions, 13921 events. 8876/13921 cut-off events. For 173/173 co-relation queries the response was YES. Maximal size of possible extension queue 778. Compared 102494 event pairs, 6402 based on Foata normal form. 10/9785 useless extension candidates. Maximal degree in co-relation 17295. Up to 7776 conditions per place. [2024-11-19 09:54:58,635 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 96 selfloop transitions, 44 changer transitions 0/167 dead transitions. [2024-11-19 09:54:58,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 167 transitions, 923 flow [2024-11-19 09:54:58,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 09:54:58,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-19 09:54:58,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 660 transitions. [2024-11-19 09:54:58,639 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4943820224719101 [2024-11-19 09:54:58,639 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 338 flow. Second operand 15 states and 660 transitions. [2024-11-19 09:54:58,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 167 transitions, 923 flow [2024-11-19 09:54:58,642 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 167 transitions, 885 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-11-19 09:54:58,646 INFO L231 Difference]: Finished difference. Result has 108 places, 119 transitions, 640 flow [2024-11-19 09:54:58,646 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=640, PETRI_PLACES=108, PETRI_TRANSITIONS=119} [2024-11-19 09:54:58,647 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 22 predicate places. [2024-11-19 09:54:58,648 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 119 transitions, 640 flow [2024-11-19 09:54:58,649 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 35.666666666666664) internal successors, (642), 18 states have internal predecessors, (642), 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) [2024-11-19 09:54:58,649 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:54:58,649 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:54:58,668 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:54:58,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:54:58,850 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:54:58,850 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:54:58,851 INFO L85 PathProgramCache]: Analyzing trace with hash -938285925, now seen corresponding path program 1 times [2024-11-19 09:54:58,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:54:58,851 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543654372] [2024-11-19 09:54:58,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:54:58,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:54:58,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:54:59,020 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:54:59,021 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:54:59,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543654372] [2024-11-19 09:54:59,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543654372] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:54:59,021 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:54:59,021 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:54:59,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532549694] [2024-11-19 09:54:59,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:54:59,022 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:54:59,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:54:59,023 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:54:59,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:54:59,093 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 89 [2024-11-19 09:54:59,094 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 108 places, 119 transitions, 640 flow. Second operand has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 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) [2024-11-19 09:54:59,094 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:54:59,094 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 89 [2024-11-19 09:54:59,094 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:00,262 INFO L124 PetriNetUnfolderBase]: 8975/14419 cut-off events. [2024-11-19 09:55:00,262 INFO L125 PetriNetUnfolderBase]: For 234/234 co-relation queries the response was YES. [2024-11-19 09:55:00,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26776 conditions, 14419 events. 8975/14419 cut-off events. For 234/234 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 105152 event pairs, 6564 based on Foata normal form. 0/10261 useless extension candidates. Maximal degree in co-relation 26700. Up to 11812 conditions per place. [2024-11-19 09:55:00,336 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 80 selfloop transitions, 11 changer transitions 0/114 dead transitions. [2024-11-19 09:55:00,336 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 114 transitions, 812 flow [2024-11-19 09:55:00,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:55:00,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:55:00,337 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 194 transitions. [2024-11-19 09:55:00,337 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43595505617977526 [2024-11-19 09:55:00,337 INFO L175 Difference]: Start difference. First operand has 108 places, 119 transitions, 640 flow. Second operand 5 states and 194 transitions. [2024-11-19 09:55:00,337 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 114 transitions, 812 flow [2024-11-19 09:55:00,342 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 114 transitions, 761 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-11-19 09:55:00,344 INFO L231 Difference]: Finished difference. Result has 104 places, 114 transitions, 601 flow [2024-11-19 09:55:00,344 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=579, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=103, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=601, PETRI_PLACES=104, PETRI_TRANSITIONS=114} [2024-11-19 09:55:00,346 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2024-11-19 09:55:00,346 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 114 transitions, 601 flow [2024-11-19 09:55:00,347 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 30.2) internal successors, (151), 5 states have internal predecessors, (151), 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) [2024-11-19 09:55:00,347 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:00,347 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:00,347 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-19 09:55:00,347 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:00,347 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:00,347 INFO L85 PathProgramCache]: Analyzing trace with hash -938285924, now seen corresponding path program 1 times [2024-11-19 09:55:00,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:00,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338749529] [2024-11-19 09:55:00,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:00,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:00,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:00,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-19 09:55:00,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:00,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338749529] [2024-11-19 09:55:00,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1338749529] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:00,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17227757] [2024-11-19 09:55:00,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:00,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:00,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:00,722 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:00,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:55:00,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:00,806 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-19 09:55:00,808 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:00,817 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:55:00,823 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 [2024-11-19 09:55:00,878 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:55:00,878 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 [2024-11-19 09:55:00,893 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 [2024-11-19 09:55:01,099 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-19 09:55:01,100 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 28 treesize of output 32 [2024-11-19 09:55:01,345 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:01,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:01,750 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:01,751 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [17227757] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:01,751 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:55:01,751 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2024-11-19 09:55:01,752 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [558076692] [2024-11-19 09:55:01,752 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:01,752 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:55:01,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:01,753 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:55:01,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-19 09:55:04,693 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.82s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:55:04,833 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 89 [2024-11-19 09:55:04,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 114 transitions, 601 flow. Second operand has 6 states, 6 states have (on average 34.833333333333336) internal successors, (209), 6 states have internal predecessors, (209), 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) [2024-11-19 09:55:04,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:04,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 89 [2024-11-19 09:55:04,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:06,412 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:55:07,980 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:55:09,349 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.36s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:55:10,867 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.50s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-19 09:55:11,922 INFO L124 PetriNetUnfolderBase]: 8975/14413 cut-off events. [2024-11-19 09:55:11,922 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2024-11-19 09:55:11,954 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26755 conditions, 14413 events. 8975/14413 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 751. Compared 105121 event pairs, 6564 based on Foata normal form. 0/10255 useless extension candidates. Maximal degree in co-relation 26681. Up to 11812 conditions per place. [2024-11-19 09:55:12,002 INFO L140 encePairwiseOnDemand]: 83/89 looper letters, 78 selfloop transitions, 14 changer transitions 0/113 dead transitions. [2024-11-19 09:55:12,003 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 789 flow [2024-11-19 09:55:12,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:55:12,003 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:55:12,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 251 transitions. [2024-11-19 09:55:12,004 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4700374531835206 [2024-11-19 09:55:12,005 INFO L175 Difference]: Start difference. First operand has 104 places, 114 transitions, 601 flow. Second operand 6 states and 251 transitions. [2024-11-19 09:55:12,005 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 789 flow [2024-11-19 09:55:12,007 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 113 transitions, 774 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:55:12,009 INFO L231 Difference]: Finished difference. Result has 104 places, 112 transitions, 610 flow [2024-11-19 09:55:12,009 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=582, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=112, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=98, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=610, PETRI_PLACES=104, PETRI_TRANSITIONS=112} [2024-11-19 09:55:12,009 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2024-11-19 09:55:12,010 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 112 transitions, 610 flow [2024-11-19 09:55:12,010 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 34.833333333333336) internal successors, (209), 6 states have internal predecessors, (209), 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) [2024-11-19 09:55:12,010 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:12,010 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:12,027 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:55:12,214 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:12,215 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:12,215 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:12,215 INFO L85 PathProgramCache]: Analyzing trace with hash 977908366, now seen corresponding path program 1 times [2024-11-19 09:55:12,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:12,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2105877999] [2024-11-19 09:55:12,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:12,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:12,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:12,412 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:12,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:12,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2105877999] [2024-11-19 09:55:12,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2105877999] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:12,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:12,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-19 09:55:12,413 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [575018571] [2024-11-19 09:55:12,413 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:12,413 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:55:12,413 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:12,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:55:12,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:55:12,489 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 89 [2024-11-19 09:55:12,489 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 112 transitions, 610 flow. Second operand has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 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) [2024-11-19 09:55:12,489 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:12,489 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 89 [2024-11-19 09:55:12,489 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:13,491 INFO L124 PetriNetUnfolderBase]: 8132/12709 cut-off events. [2024-11-19 09:55:13,491 INFO L125 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2024-11-19 09:55:13,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23981 conditions, 12709 events. 8132/12709 cut-off events. For 214/214 co-relation queries the response was YES. Maximal size of possible extension queue 728. Compared 89466 event pairs, 5934 based on Foata normal form. 0/9292 useless extension candidates. Maximal degree in co-relation 23907. Up to 10756 conditions per place. [2024-11-19 09:55:13,550 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 76 selfloop transitions, 13 changer transitions 0/107 dead transitions. [2024-11-19 09:55:13,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 107 transitions, 778 flow [2024-11-19 09:55:13,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:55:13,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:55:13,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 197 transitions. [2024-11-19 09:55:13,551 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44269662921348313 [2024-11-19 09:55:13,552 INFO L175 Difference]: Start difference. First operand has 104 places, 112 transitions, 610 flow. Second operand 5 states and 197 transitions. [2024-11-19 09:55:13,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 107 transitions, 778 flow [2024-11-19 09:55:13,554 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 107 transitions, 763 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:55:13,555 INFO L231 Difference]: Finished difference. Result has 100 places, 107 transitions, 611 flow [2024-11-19 09:55:13,556 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=585, PETRI_DIFFERENCE_MINUEND_PLACES=96, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=611, PETRI_PLACES=100, PETRI_TRANSITIONS=107} [2024-11-19 09:55:13,556 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 14 predicate places. [2024-11-19 09:55:13,556 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 107 transitions, 611 flow [2024-11-19 09:55:13,557 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 31.4) internal successors, (157), 5 states have internal predecessors, (157), 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) [2024-11-19 09:55:13,557 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:13,557 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:13,557 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 09:55:13,557 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:13,558 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:13,558 INFO L85 PathProgramCache]: Analyzing trace with hash 977908367, now seen corresponding path program 1 times [2024-11-19 09:55:13,558 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:13,558 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87359714] [2024-11-19 09:55:13,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:13,558 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:13,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:13,710 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:13,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:13,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87359714] [2024-11-19 09:55:13,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87359714] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:13,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834746472] [2024-11-19 09:55:13,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:13,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:13,712 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:13,713 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:13,714 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:55:13,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:13,800 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-19 09:55:13,801 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:13,809 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-19 09:55:13,852 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:55:13,853 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 16 treesize of output 11 [2024-11-19 09:55:13,862 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:55:13,862 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 [2024-11-19 09:55:13,885 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:13,886 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:13,944 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 52 treesize of output 48 [2024-11-19 09:55:14,007 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:14,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [834746472] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:55:14,007 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:55:14,008 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-19 09:55:14,008 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63749824] [2024-11-19 09:55:14,008 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:55:14,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-19 09:55:14,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:14,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-19 09:55:14,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-19 09:55:14,383 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 89 [2024-11-19 09:55:14,384 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 107 transitions, 611 flow. Second operand has 10 states, 10 states have (on average 34.5) internal successors, (345), 10 states have internal predecessors, (345), 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) [2024-11-19 09:55:14,384 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:14,384 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 89 [2024-11-19 09:55:14,384 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:15,345 INFO L124 PetriNetUnfolderBase]: 7118/11161 cut-off events. [2024-11-19 09:55:15,345 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2024-11-19 09:55:15,368 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21011 conditions, 11161 events. 7118/11161 cut-off events. For 215/215 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 79568 event pairs, 5070 based on Foata normal form. 0/8092 useless extension candidates. Maximal degree in co-relation 20937. Up to 9352 conditions per place. [2024-11-19 09:55:15,508 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 67 selfloop transitions, 23 changer transitions 0/107 dead transitions. [2024-11-19 09:55:15,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 107 transitions, 803 flow [2024-11-19 09:55:15,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:55:15,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:55:15,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 310 transitions. [2024-11-19 09:55:15,510 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4353932584269663 [2024-11-19 09:55:15,511 INFO L175 Difference]: Start difference. First operand has 100 places, 107 transitions, 611 flow. Second operand 8 states and 310 transitions. [2024-11-19 09:55:15,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 107 transitions, 803 flow [2024-11-19 09:55:15,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 107 transitions, 784 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-19 09:55:15,516 INFO L231 Difference]: Finished difference. Result has 102 places, 105 transitions, 634 flow [2024-11-19 09:55:15,516 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=588, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=634, PETRI_PLACES=102, PETRI_TRANSITIONS=105} [2024-11-19 09:55:15,516 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 16 predicate places. [2024-11-19 09:55:15,517 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 105 transitions, 634 flow [2024-11-19 09:55:15,517 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 34.5) internal successors, (345), 10 states have internal predecessors, (345), 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) [2024-11-19 09:55:15,517 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:15,517 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1] [2024-11-19 09:55:15,532 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2024-11-19 09:55:15,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:15,718 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:15,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:15,719 INFO L85 PathProgramCache]: Analyzing trace with hash 2103192318, now seen corresponding path program 3 times [2024-11-19 09:55:15,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:15,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197533875] [2024-11-19 09:55:15,719 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:55:15,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:15,742 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:55:15,742 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:55:15,971 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:55:15,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:15,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197533875] [2024-11-19 09:55:15,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197533875] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:15,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63153724] [2024-11-19 09:55:15,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:55:15,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:15,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:15,974 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:15,976 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-19 09:55:16,072 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-19 09:55:16,072 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:55:16,076 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-19 09:55:16,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:16,086 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:55:16,195 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:55:16,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 27 treesize of output 24 [2024-11-19 09:55:16,331 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:55:16,331 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:16,528 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:55:16,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [63153724] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:55:16,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:55:16,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-19 09:55:16,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702514831] [2024-11-19 09:55:16,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:55:16,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:55:16,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:16,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:55:16,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:55:17,456 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-19 09:55:17,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 105 transitions, 634 flow. Second operand has 17 states, 17 states have (on average 35.76470588235294) internal successors, (608), 17 states have internal predecessors, (608), 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) [2024-11-19 09:55:17,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:17,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-19 09:55:17,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:18,713 INFO L124 PetriNetUnfolderBase]: 7118/11157 cut-off events. [2024-11-19 09:55:18,713 INFO L125 PetriNetUnfolderBase]: For 233/233 co-relation queries the response was YES. [2024-11-19 09:55:18,734 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21004 conditions, 11157 events. 7118/11157 cut-off events. For 233/233 co-relation queries the response was YES. Maximal size of possible extension queue 675. Compared 79607 event pairs, 5070 based on Foata normal form. 4/8092 useless extension candidates. Maximal degree in co-relation 20954. Up to 9352 conditions per place. [2024-11-19 09:55:18,756 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 37 selfloop transitions, 53 changer transitions 0/105 dead transitions. [2024-11-19 09:55:18,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 105 transitions, 806 flow [2024-11-19 09:55:18,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:55:18,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:55:18,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 292 transitions. [2024-11-19 09:55:18,758 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46869983948635635 [2024-11-19 09:55:18,758 INFO L175 Difference]: Start difference. First operand has 102 places, 105 transitions, 634 flow. Second operand 7 states and 292 transitions. [2024-11-19 09:55:18,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 105 transitions, 806 flow [2024-11-19 09:55:18,760 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 105 transitions, 749 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-11-19 09:55:18,762 INFO L231 Difference]: Finished difference. Result has 98 places, 105 transitions, 675 flow [2024-11-19 09:55:18,762 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=675, PETRI_PLACES=98, PETRI_TRANSITIONS=105} [2024-11-19 09:55:18,762 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 12 predicate places. [2024-11-19 09:55:18,762 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 105 transitions, 675 flow [2024-11-19 09:55:18,763 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 35.76470588235294) internal successors, (608), 17 states have internal predecessors, (608), 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) [2024-11-19 09:55:18,763 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:18,763 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:18,776 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-19 09:55:18,963 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:18,964 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:18,964 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:18,964 INFO L85 PathProgramCache]: Analyzing trace with hash -1136642886, now seen corresponding path program 1 times [2024-11-19 09:55:18,964 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:18,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413942532] [2024-11-19 09:55:18,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:18,965 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:18,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:19,063 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:19,064 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:19,064 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413942532] [2024-11-19 09:55:19,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1413942532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:19,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [415375610] [2024-11-19 09:55:19,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:19,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:19,066 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:19,067 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:19,069 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-19 09:55:19,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:19,163 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 09:55:19,164 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:19,217 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:19,217 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:19,265 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:19,266 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [415375610] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:55:19,266 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:55:19,266 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-19 09:55:19,266 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [100249106] [2024-11-19 09:55:19,266 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:55:19,267 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 09:55:19,267 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:19,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 09:55:19,268 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:55:19,359 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-19 09:55:19,360 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 105 transitions, 675 flow. Second operand has 12 states, 12 states have (on average 38.333333333333336) internal successors, (460), 12 states have internal predecessors, (460), 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) [2024-11-19 09:55:19,360 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:19,360 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-19 09:55:19,360 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:20,044 INFO L124 PetriNetUnfolderBase]: 4452/7131 cut-off events. [2024-11-19 09:55:20,044 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2024-11-19 09:55:20,056 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13621 conditions, 7131 events. 4452/7131 cut-off events. For 119/119 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 46643 event pairs, 2594 based on Foata normal form. 0/5154 useless extension candidates. Maximal degree in co-relation 13400. Up to 3523 conditions per place. [2024-11-19 09:55:20,070 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 95 selfloop transitions, 44 changer transitions 0/153 dead transitions. [2024-11-19 09:55:20,071 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 153 transitions, 1057 flow [2024-11-19 09:55:20,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:55:20,071 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:55:20,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 440 transitions. [2024-11-19 09:55:20,072 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5493133583021224 [2024-11-19 09:55:20,072 INFO L175 Difference]: Start difference. First operand has 98 places, 105 transitions, 675 flow. Second operand 9 states and 440 transitions. [2024-11-19 09:55:20,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 153 transitions, 1057 flow [2024-11-19 09:55:20,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 153 transitions, 1044 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-19 09:55:20,077 INFO L231 Difference]: Finished difference. Result has 107 places, 107 transitions, 767 flow [2024-11-19 09:55:20,077 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=662, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=767, PETRI_PLACES=107, PETRI_TRANSITIONS=107} [2024-11-19 09:55:20,078 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 21 predicate places. [2024-11-19 09:55:20,078 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 107 transitions, 767 flow [2024-11-19 09:55:20,078 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 38.333333333333336) internal successors, (460), 12 states have internal predecessors, (460), 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) [2024-11-19 09:55:20,078 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:20,078 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:20,096 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-19 09:55:20,282 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-19 09:55:20,283 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:20,283 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:20,283 INFO L85 PathProgramCache]: Analyzing trace with hash -1465569679, now seen corresponding path program 1 times [2024-11-19 09:55:20,283 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:20,283 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063370882] [2024-11-19 09:55:20,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:20,283 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:20,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:20,400 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:20,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:20,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063370882] [2024-11-19 09:55:20,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063370882] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:20,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1502391072] [2024-11-19 09:55:20,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:20,401 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:20,402 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:20,403 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:20,405 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-19 09:55:20,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:20,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 09:55:20,515 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:20,576 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:20,576 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:20,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:20,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1502391072] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:55:20,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:55:20,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-19 09:55:20,640 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049857788] [2024-11-19 09:55:20,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:55:20,642 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 09:55:20,642 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:20,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 09:55:20,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:55:20,704 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-19 09:55:20,705 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 107 transitions, 767 flow. Second operand has 12 states, 12 states have (on average 38.583333333333336) internal successors, (463), 12 states have internal predecessors, (463), 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) [2024-11-19 09:55:20,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:20,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-19 09:55:20,706 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:21,181 INFO L124 PetriNetUnfolderBase]: 3255/5237 cut-off events. [2024-11-19 09:55:21,181 INFO L125 PetriNetUnfolderBase]: For 933/1058 co-relation queries the response was YES. [2024-11-19 09:55:21,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10710 conditions, 5237 events. 3255/5237 cut-off events. For 933/1058 co-relation queries the response was YES. Maximal size of possible extension queue 288. Compared 31103 event pairs, 2162 based on Foata normal form. 0/3920 useless extension candidates. Maximal degree in co-relation 10467. Up to 3518 conditions per place. [2024-11-19 09:55:21,203 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 82 selfloop transitions, 44 changer transitions 0/140 dead transitions. [2024-11-19 09:55:21,203 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 140 transitions, 1101 flow [2024-11-19 09:55:21,203 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:55:21,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:55:21,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 427 transitions. [2024-11-19 09:55:21,205 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.533083645443196 [2024-11-19 09:55:21,205 INFO L175 Difference]: Start difference. First operand has 107 places, 107 transitions, 767 flow. Second operand 9 states and 427 transitions. [2024-11-19 09:55:21,205 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 140 transitions, 1101 flow [2024-11-19 09:55:21,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 140 transitions, 1020 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:55:21,210 INFO L231 Difference]: Finished difference. Result has 111 places, 109 transitions, 791 flow [2024-11-19 09:55:21,211 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=686, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=791, PETRI_PLACES=111, PETRI_TRANSITIONS=109} [2024-11-19 09:55:21,211 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 25 predicate places. [2024-11-19 09:55:21,211 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 109 transitions, 791 flow [2024-11-19 09:55:21,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 38.583333333333336) internal successors, (463), 12 states have internal predecessors, (463), 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) [2024-11-19 09:55:21,212 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:21,212 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] [2024-11-19 09:55:21,229 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-19 09:55:21,412 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-19 09:55:21,413 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:21,413 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:21,413 INFO L85 PathProgramCache]: Analyzing trace with hash -1263889248, now seen corresponding path program 1 times [2024-11-19 09:55:21,413 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:21,413 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434473734] [2024-11-19 09:55:21,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:21,413 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:21,428 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:21,494 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:21,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:21,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434473734] [2024-11-19 09:55:21,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434473734] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:21,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:21,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:55:21,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676204646] [2024-11-19 09:55:21,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:21,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:55:21,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:21,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:55:21,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:55:21,542 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-19 09:55:21,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 109 transitions, 791 flow. Second operand has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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) [2024-11-19 09:55:21,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:21,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-19 09:55:21,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:21,815 INFO L124 PetriNetUnfolderBase]: 2466/3897 cut-off events. [2024-11-19 09:55:21,815 INFO L125 PetriNetUnfolderBase]: For 1346/1447 co-relation queries the response was YES. [2024-11-19 09:55:21,824 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8847 conditions, 3897 events. 2466/3897 cut-off events. For 1346/1447 co-relation queries the response was YES. Maximal size of possible extension queue 251. Compared 22167 event pairs, 1866 based on Foata normal form. 0/3123 useless extension candidates. Maximal degree in co-relation 8601. Up to 3352 conditions per place. [2024-11-19 09:55:21,835 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 84 selfloop transitions, 8 changer transitions 0/107 dead transitions. [2024-11-19 09:55:21,836 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 107 transitions, 971 flow [2024-11-19 09:55:21,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:55:21,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:55:21,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2024-11-19 09:55:21,837 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5112359550561798 [2024-11-19 09:55:21,837 INFO L175 Difference]: Start difference. First operand has 111 places, 109 transitions, 791 flow. Second operand 4 states and 182 transitions. [2024-11-19 09:55:21,837 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 107 transitions, 971 flow [2024-11-19 09:55:21,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 107 transitions, 890 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-19 09:55:21,842 INFO L231 Difference]: Finished difference. Result has 106 places, 107 transitions, 722 flow [2024-11-19 09:55:21,842 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=706, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=722, PETRI_PLACES=106, PETRI_TRANSITIONS=107} [2024-11-19 09:55:21,843 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 20 predicate places. [2024-11-19 09:55:21,843 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 107 transitions, 722 flow [2024-11-19 09:55:21,843 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 39.0) internal successors, (156), 4 states have internal predecessors, (156), 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) [2024-11-19 09:55:21,843 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:21,843 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:21,843 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-19 09:55:21,844 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:21,844 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:21,844 INFO L85 PathProgramCache]: Analyzing trace with hash -2069704291, now seen corresponding path program 2 times [2024-11-19 09:55:21,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:21,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468654869] [2024-11-19 09:55:21,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:55:21,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:21,866 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:55:21,866 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:55:22,208 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 09:55:22,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:22,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468654869] [2024-11-19 09:55:22,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468654869] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:22,209 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:22,209 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:55:22,209 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222827844] [2024-11-19 09:55:22,209 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:22,210 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:55:22,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:22,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:55:22,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:55:22,475 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 89 [2024-11-19 09:55:22,476 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 107 transitions, 722 flow. Second operand has 8 states, 8 states have (on average 25.25) internal successors, (202), 8 states have internal predecessors, (202), 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) [2024-11-19 09:55:22,476 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:22,476 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 89 [2024-11-19 09:55:22,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:23,249 INFO L124 PetriNetUnfolderBase]: 5212/8161 cut-off events. [2024-11-19 09:55:23,249 INFO L125 PetriNetUnfolderBase]: For 1534/1739 co-relation queries the response was YES. [2024-11-19 09:55:23,276 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17667 conditions, 8161 events. 5212/8161 cut-off events. For 1534/1739 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 51657 event pairs, 2570 based on Foata normal form. 0/6041 useless extension candidates. Maximal degree in co-relation 17442. Up to 4536 conditions per place. [2024-11-19 09:55:23,299 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 132 selfloop transitions, 11 changer transitions 0/153 dead transitions. [2024-11-19 09:55:23,299 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 153 transitions, 1124 flow [2024-11-19 09:55:23,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:55:23,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:55:23,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 256 transitions. [2024-11-19 09:55:23,301 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41091492776886035 [2024-11-19 09:55:23,301 INFO L175 Difference]: Start difference. First operand has 106 places, 107 transitions, 722 flow. Second operand 7 states and 256 transitions. [2024-11-19 09:55:23,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 153 transitions, 1124 flow [2024-11-19 09:55:23,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 153 transitions, 1115 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:55:23,310 INFO L231 Difference]: Finished difference. Result has 112 places, 110 transitions, 762 flow [2024-11-19 09:55:23,311 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=713, PETRI_DIFFERENCE_MINUEND_PLACES=104, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=107, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=762, PETRI_PLACES=112, PETRI_TRANSITIONS=110} [2024-11-19 09:55:23,311 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 26 predicate places. [2024-11-19 09:55:23,311 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 110 transitions, 762 flow [2024-11-19 09:55:23,311 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 25.25) internal successors, (202), 8 states have internal predecessors, (202), 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) [2024-11-19 09:55:23,312 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:23,312 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] [2024-11-19 09:55:23,312 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-19 09:55:23,312 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:23,312 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:23,312 INFO L85 PathProgramCache]: Analyzing trace with hash -1263889247, now seen corresponding path program 1 times [2024-11-19 09:55:23,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:23,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959915478] [2024-11-19 09:55:23,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:23,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:23,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:23,420 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:23,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:23,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959915478] [2024-11-19 09:55:23,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959915478] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:23,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281360128] [2024-11-19 09:55:23,421 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:23,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:23,421 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:23,422 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:23,424 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-19 09:55:23,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:23,525 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 09:55:23,527 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:23,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:23,588 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:23,649 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-19 09:55:23,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281360128] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:55:23,649 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:55:23,649 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-19 09:55:23,650 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101293141] [2024-11-19 09:55:23,650 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:55:23,650 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 09:55:23,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:23,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 09:55:23,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:55:23,736 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-19 09:55:23,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 110 transitions, 762 flow. Second operand has 12 states, 12 states have (on average 38.75) internal successors, (465), 12 states have internal predecessors, (465), 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) [2024-11-19 09:55:23,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:23,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-19 09:55:23,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:24,494 INFO L124 PetriNetUnfolderBase]: 4052/6543 cut-off events. [2024-11-19 09:55:24,494 INFO L125 PetriNetUnfolderBase]: For 2824/3212 co-relation queries the response was YES. [2024-11-19 09:55:24,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14756 conditions, 6543 events. 4052/6543 cut-off events. For 2824/3212 co-relation queries the response was YES. Maximal size of possible extension queue 277. Compared 40980 event pairs, 2375 based on Foata normal form. 98/5076 useless extension candidates. Maximal degree in co-relation 14528. Up to 4286 conditions per place. [2024-11-19 09:55:24,536 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 94 selfloop transitions, 44 changer transitions 0/153 dead transitions. [2024-11-19 09:55:24,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 153 transitions, 1181 flow [2024-11-19 09:55:24,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:55:24,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:55:24,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 471 transitions. [2024-11-19 09:55:24,539 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5292134831460674 [2024-11-19 09:55:24,539 INFO L175 Difference]: Start difference. First operand has 112 places, 110 transitions, 762 flow. Second operand 10 states and 471 transitions. [2024-11-19 09:55:24,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 153 transitions, 1181 flow [2024-11-19 09:55:24,552 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 153 transitions, 1153 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-19 09:55:24,557 INFO L231 Difference]: Finished difference. Result has 120 places, 112 transitions, 877 flow [2024-11-19 09:55:24,558 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=743, PETRI_DIFFERENCE_MINUEND_PLACES=108, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=877, PETRI_PLACES=120, PETRI_TRANSITIONS=112} [2024-11-19 09:55:24,558 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 34 predicate places. [2024-11-19 09:55:24,559 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 112 transitions, 877 flow [2024-11-19 09:55:24,560 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 38.75) internal successors, (465), 12 states have internal predecessors, (465), 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) [2024-11-19 09:55:24,560 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:24,560 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:24,579 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-19 09:55:24,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-19 09:55:24,761 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:24,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:24,761 INFO L85 PathProgramCache]: Analyzing trace with hash -415937407, now seen corresponding path program 1 times [2024-11-19 09:55:24,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:24,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1502917483] [2024-11-19 09:55:24,762 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:24,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:24,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:25,161 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:55:25,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:25,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1502917483] [2024-11-19 09:55:25,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1502917483] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:25,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862233052] [2024-11-19 09:55:25,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:25,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:25,163 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:25,164 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:25,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-19 09:55:25,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:25,281 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-19 09:55:25,284 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:25,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-19 09:55:25,401 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-19 09:55:25,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 21 treesize of output 21 [2024-11-19 09:55:25,730 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:55:25,730 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:26,018 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:55:26,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1862233052] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:26,019 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:55:26,019 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 22 [2024-11-19 09:55:26,019 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105232005] [2024-11-19 09:55:26,019 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:26,020 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:55:26,020 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:26,020 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:55:26,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-19 09:55:26,234 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-19 09:55:26,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 112 transitions, 877 flow. Second operand has 8 states, 8 states have (on average 36.375) internal successors, (291), 8 states have internal predecessors, (291), 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) [2024-11-19 09:55:26,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:26,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-19 09:55:26,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:27,113 INFO L124 PetriNetUnfolderBase]: 4310/6517 cut-off events. [2024-11-19 09:55:27,113 INFO L125 PetriNetUnfolderBase]: For 2250/2542 co-relation queries the response was YES. [2024-11-19 09:55:27,131 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15560 conditions, 6517 events. 4310/6517 cut-off events. For 2250/2542 co-relation queries the response was YES. Maximal size of possible extension queue 302. Compared 36998 event pairs, 1378 based on Foata normal form. 14/5079 useless extension candidates. Maximal degree in co-relation 15294. Up to 3277 conditions per place. [2024-11-19 09:55:27,152 INFO L140 encePairwiseOnDemand]: 75/89 looper letters, 106 selfloop transitions, 36 changer transitions 0/155 dead transitions. [2024-11-19 09:55:27,152 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 155 transitions, 1304 flow [2024-11-19 09:55:27,153 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 09:55:27,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 09:55:27,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 481 transitions. [2024-11-19 09:55:27,155 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.491317671092952 [2024-11-19 09:55:27,155 INFO L175 Difference]: Start difference. First operand has 120 places, 112 transitions, 877 flow. Second operand 11 states and 481 transitions. [2024-11-19 09:55:27,155 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 155 transitions, 1304 flow [2024-11-19 09:55:27,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 155 transitions, 1253 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-19 09:55:27,174 INFO L231 Difference]: Finished difference. Result has 127 places, 115 transitions, 948 flow [2024-11-19 09:55:27,174 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=824, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=948, PETRI_PLACES=127, PETRI_TRANSITIONS=115} [2024-11-19 09:55:27,175 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 41 predicate places. [2024-11-19 09:55:27,175 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 115 transitions, 948 flow [2024-11-19 09:55:27,175 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 36.375) internal successors, (291), 8 states have internal predecessors, (291), 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) [2024-11-19 09:55:27,175 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:27,175 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:27,193 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-19 09:55:27,379 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-19 09:55:27,380 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:27,380 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:27,380 INFO L85 PathProgramCache]: Analyzing trace with hash -489415020, now seen corresponding path program 2 times [2024-11-19 09:55:27,380 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:27,380 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018330223] [2024-11-19 09:55:27,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:55:27,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:27,410 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:55:27,410 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:55:27,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 09:55:27,708 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:27,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018330223] [2024-11-19 09:55:27,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2018330223] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:27,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:27,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:55:27,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315739186] [2024-11-19 09:55:27,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:27,710 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-19 09:55:27,710 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:27,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-19 09:55:27,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-19 09:55:28,066 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 89 [2024-11-19 09:55:28,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 115 transitions, 948 flow. Second operand has 8 states, 8 states have (on average 32.375) internal successors, (259), 8 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:28,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:28,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 89 [2024-11-19 09:55:28,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:29,161 INFO L124 PetriNetUnfolderBase]: 7523/10794 cut-off events. [2024-11-19 09:55:29,161 INFO L125 PetriNetUnfolderBase]: For 8750/9234 co-relation queries the response was YES. [2024-11-19 09:55:29,195 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28008 conditions, 10794 events. 7523/10794 cut-off events. For 8750/9234 co-relation queries the response was YES. Maximal size of possible extension queue 434. Compared 61292 event pairs, 3460 based on Foata normal form. 172/8227 useless extension candidates. Maximal degree in co-relation 27739. Up to 6341 conditions per place. [2024-11-19 09:55:29,234 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 137 selfloop transitions, 21 changer transitions 0/171 dead transitions. [2024-11-19 09:55:29,234 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 171 transitions, 1508 flow [2024-11-19 09:55:29,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:55:29,235 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:55:29,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 331 transitions. [2024-11-19 09:55:29,236 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4648876404494382 [2024-11-19 09:55:29,236 INFO L175 Difference]: Start difference. First operand has 127 places, 115 transitions, 948 flow. Second operand 8 states and 331 transitions. [2024-11-19 09:55:29,236 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 171 transitions, 1508 flow [2024-11-19 09:55:29,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 171 transitions, 1496 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:55:29,254 INFO L231 Difference]: Finished difference. Result has 134 places, 118 transitions, 1003 flow [2024-11-19 09:55:29,255 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=936, PETRI_DIFFERENCE_MINUEND_PLACES=125, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1003, PETRI_PLACES=134, PETRI_TRANSITIONS=118} [2024-11-19 09:55:29,256 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 48 predicate places. [2024-11-19 09:55:29,256 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 118 transitions, 1003 flow [2024-11-19 09:55:29,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 32.375) internal successors, (259), 8 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:55:29,256 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:29,256 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:29,257 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-19 09:55:29,257 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:29,257 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:29,257 INFO L85 PathProgramCache]: Analyzing trace with hash -489415018, now seen corresponding path program 1 times [2024-11-19 09:55:29,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:29,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1971046772] [2024-11-19 09:55:29,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:29,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:29,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:29,572 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:55:29,573 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:29,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1971046772] [2024-11-19 09:55:29,573 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1971046772] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:29,573 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113940420] [2024-11-19 09:55:29,573 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:29,574 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:29,574 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:29,576 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:29,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-19 09:55:29,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:29,697 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-19 09:55:29,698 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:29,791 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:55:29,791 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:29,870 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-19 09:55:29,929 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:55:29,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113940420] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:55:29,930 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:55:29,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-19 09:55:29,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376932700] [2024-11-19 09:55:29,930 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:55:29,930 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:55:29,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:29,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:55:29,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:55:30,344 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-19 09:55:30,345 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 118 transitions, 1003 flow. Second operand has 17 states, 17 states have (on average 39.8235294117647) internal successors, (677), 17 states have internal predecessors, (677), 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) [2024-11-19 09:55:30,345 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:30,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-19 09:55:30,346 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:31,365 INFO L124 PetriNetUnfolderBase]: 5206/8069 cut-off events. [2024-11-19 09:55:31,365 INFO L125 PetriNetUnfolderBase]: For 8853/9800 co-relation queries the response was YES. [2024-11-19 09:55:31,398 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21984 conditions, 8069 events. 5206/8069 cut-off events. For 8853/9800 co-relation queries the response was YES. Maximal size of possible extension queue 333. Compared 49850 event pairs, 2062 based on Foata normal form. 277/6882 useless extension candidates. Maximal degree in co-relation 21707. Up to 3875 conditions per place. [2024-11-19 09:55:31,425 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 123 selfloop transitions, 33 changer transitions 0/173 dead transitions. [2024-11-19 09:55:31,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 173 transitions, 1511 flow [2024-11-19 09:55:31,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:55:31,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:55:31,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 415 transitions. [2024-11-19 09:55:31,426 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5828651685393258 [2024-11-19 09:55:31,426 INFO L175 Difference]: Start difference. First operand has 134 places, 118 transitions, 1003 flow. Second operand 8 states and 415 transitions. [2024-11-19 09:55:31,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 173 transitions, 1511 flow [2024-11-19 09:55:31,446 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 173 transitions, 1470 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-19 09:55:31,449 INFO L231 Difference]: Finished difference. Result has 138 places, 119 transitions, 1048 flow [2024-11-19 09:55:31,449 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=964, PETRI_DIFFERENCE_MINUEND_PLACES=129, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=118, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=85, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1048, PETRI_PLACES=138, PETRI_TRANSITIONS=119} [2024-11-19 09:55:31,450 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 52 predicate places. [2024-11-19 09:55:31,450 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 119 transitions, 1048 flow [2024-11-19 09:55:31,450 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 39.8235294117647) internal successors, (677), 17 states have internal predecessors, (677), 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) [2024-11-19 09:55:31,450 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:31,451 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:31,468 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-19 09:55:31,654 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:31,655 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:31,655 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:31,655 INFO L85 PathProgramCache]: Analyzing trace with hash -489415022, now seen corresponding path program 1 times [2024-11-19 09:55:31,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:31,655 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766309079] [2024-11-19 09:55:31,655 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:31,655 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:31,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:32,028 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:55:32,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:32,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766309079] [2024-11-19 09:55:32,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766309079] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:32,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499473599] [2024-11-19 09:55:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:32,029 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:32,030 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:32,032 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:32,033 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-19 09:55:32,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:32,143 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-19 09:55:32,145 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:32,152 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 [2024-11-19 09:55:32,158 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-19 09:55:32,230 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-19 09:55:32,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-19 09:55:32,245 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-19 09:55:32,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 18 [2024-11-19 09:55:32,415 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:55:32,416 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-19 09:55:32,419 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-19 09:55:32,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 2 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 41 treesize of output 33 [2024-11-19 09:55:32,436 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-11-19 09:55:32,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 16 treesize of output 18 [2024-11-19 09:55:32,676 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-19 09:55:32,676 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:32,988 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:55:32,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499473599] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:32,989 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-19 09:55:32,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 22 [2024-11-19 09:55:32,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1869069393] [2024-11-19 09:55:32,989 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:32,989 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-19 09:55:32,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:32,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-19 09:55:32,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-11-19 09:55:33,360 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 89 [2024-11-19 09:55:33,361 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 119 transitions, 1048 flow. Second operand has 9 states, 9 states have (on average 35.333333333333336) internal successors, (318), 9 states have internal predecessors, (318), 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) [2024-11-19 09:55:33,361 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:33,361 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 89 [2024-11-19 09:55:33,361 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:34,363 INFO L124 PetriNetUnfolderBase]: 5341/8065 cut-off events. [2024-11-19 09:55:34,363 INFO L125 PetriNetUnfolderBase]: For 11196/11885 co-relation queries the response was YES. [2024-11-19 09:55:34,391 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23784 conditions, 8065 events. 5341/8065 cut-off events. For 11196/11885 co-relation queries the response was YES. Maximal size of possible extension queue 329. Compared 45523 event pairs, 1721 based on Foata normal form. 492/7582 useless extension candidates. Maximal degree in co-relation 23500. Up to 3666 conditions per place. [2024-11-19 09:55:34,415 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 115 selfloop transitions, 31 changer transitions 0/161 dead transitions. [2024-11-19 09:55:34,415 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 161 transitions, 1511 flow [2024-11-19 09:55:34,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-19 09:55:34,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-19 09:55:34,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 426 transitions. [2024-11-19 09:55:34,417 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4786516853932584 [2024-11-19 09:55:34,417 INFO L175 Difference]: Start difference. First operand has 138 places, 119 transitions, 1048 flow. Second operand 10 states and 426 transitions. [2024-11-19 09:55:34,417 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 161 transitions, 1511 flow [2024-11-19 09:55:34,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 161 transitions, 1448 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-19 09:55:34,436 INFO L231 Difference]: Finished difference. Result has 145 places, 122 transitions, 1099 flow [2024-11-19 09:55:34,436 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=987, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1099, PETRI_PLACES=145, PETRI_TRANSITIONS=122} [2024-11-19 09:55:34,437 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 59 predicate places. [2024-11-19 09:55:34,437 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 122 transitions, 1099 flow [2024-11-19 09:55:34,437 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 35.333333333333336) internal successors, (318), 9 states have internal predecessors, (318), 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) [2024-11-19 09:55:34,437 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:34,437 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:34,449 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-19 09:55:34,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-19 09:55:34,638 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:34,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:34,638 INFO L85 PathProgramCache]: Analyzing trace with hash 1252155440, now seen corresponding path program 1 times [2024-11-19 09:55:34,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:34,639 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [29321328] [2024-11-19 09:55:34,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:34,639 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:34,764 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:55:34,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:34,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [29321328] [2024-11-19 09:55:34,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [29321328] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:34,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1147737915] [2024-11-19 09:55:34,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:34,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:34,765 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:34,768 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:34,769 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-19 09:55:34,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:34,883 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 09:55:34,884 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:34,956 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:55:34,956 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:35,020 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:55:35,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1147737915] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:55:35,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:55:35,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-19 09:55:35,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857072060] [2024-11-19 09:55:35,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:55:35,021 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:55:35,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:35,021 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:55:35,021 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:55:35,100 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-19 09:55:35,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 145 places, 122 transitions, 1099 flow. Second operand has 17 states, 17 states have (on average 38.64705882352941) internal successors, (657), 17 states have internal predecessors, (657), 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) [2024-11-19 09:55:35,101 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:35,101 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-19 09:55:35,101 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:36,257 INFO L124 PetriNetUnfolderBase]: 8623/12831 cut-off events. [2024-11-19 09:55:36,257 INFO L125 PetriNetUnfolderBase]: For 25495/26065 co-relation queries the response was YES. [2024-11-19 09:55:36,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41060 conditions, 12831 events. 8623/12831 cut-off events. For 25495/26065 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 77965 event pairs, 4603 based on Foata normal form. 220/11273 useless extension candidates. Maximal degree in co-relation 25039. Up to 7086 conditions per place. [2024-11-19 09:55:36,357 INFO L140 encePairwiseOnDemand]: 75/89 looper letters, 142 selfloop transitions, 61 changer transitions 0/218 dead transitions. [2024-11-19 09:55:36,358 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 218 transitions, 2069 flow [2024-11-19 09:55:36,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 09:55:36,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-19 09:55:36,359 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 700 transitions. [2024-11-19 09:55:36,359 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5243445692883895 [2024-11-19 09:55:36,359 INFO L175 Difference]: Start difference. First operand has 145 places, 122 transitions, 1099 flow. Second operand 15 states and 700 transitions. [2024-11-19 09:55:36,359 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 218 transitions, 2069 flow [2024-11-19 09:55:36,402 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 218 transitions, 2022 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-19 09:55:36,406 INFO L231 Difference]: Finished difference. Result has 158 places, 137 transitions, 1449 flow [2024-11-19 09:55:36,406 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1060, PETRI_DIFFERENCE_MINUEND_PLACES=139, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=47, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1449, PETRI_PLACES=158, PETRI_TRANSITIONS=137} [2024-11-19 09:55:36,406 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 72 predicate places. [2024-11-19 09:55:36,406 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 137 transitions, 1449 flow [2024-11-19 09:55:36,407 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 38.64705882352941) internal successors, (657), 17 states have internal predecessors, (657), 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) [2024-11-19 09:55:36,407 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:36,407 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:36,419 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-19 09:55:36,607 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:36,607 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:36,608 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:36,608 INFO L85 PathProgramCache]: Analyzing trace with hash 1607383876, now seen corresponding path program 2 times [2024-11-19 09:55:36,608 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:36,608 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141413272] [2024-11-19 09:55:36,608 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:55:36,608 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:36,630 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:55:36,630 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:55:36,722 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 09:55:36,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:36,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141413272] [2024-11-19 09:55:36,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1141413272] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:36,723 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:36,723 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-19 09:55:36,724 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [359074963] [2024-11-19 09:55:36,724 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:36,724 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:55:36,724 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:36,725 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:55:36,725 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:55:36,740 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-19 09:55:36,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 137 transitions, 1449 flow. Second operand has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 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) [2024-11-19 09:55:36,741 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:36,741 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-19 09:55:36,741 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:37,974 INFO L124 PetriNetUnfolderBase]: 9232/13574 cut-off events. [2024-11-19 09:55:37,975 INFO L125 PetriNetUnfolderBase]: For 38017/39073 co-relation queries the response was YES. [2024-11-19 09:55:38,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43987 conditions, 13574 events. 9232/13574 cut-off events. For 38017/39073 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 79799 event pairs, 1460 based on Foata normal form. 818/12772 useless extension candidates. Maximal degree in co-relation 27387. Up to 8792 conditions per place. [2024-11-19 09:55:38,072 INFO L140 encePairwiseOnDemand]: 83/89 looper letters, 197 selfloop transitions, 18 changer transitions 0/229 dead transitions. [2024-11-19 09:55:38,072 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 229 transitions, 2446 flow [2024-11-19 09:55:38,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-19 09:55:38,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-19 09:55:38,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 324 transitions. [2024-11-19 09:55:38,073 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6067415730337079 [2024-11-19 09:55:38,073 INFO L175 Difference]: Start difference. First operand has 158 places, 137 transitions, 1449 flow. Second operand 6 states and 324 transitions. [2024-11-19 09:55:38,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 229 transitions, 2446 flow [2024-11-19 09:55:38,109 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 229 transitions, 2414 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-19 09:55:38,112 INFO L231 Difference]: Finished difference. Result has 166 places, 143 transitions, 1506 flow [2024-11-19 09:55:38,112 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1419, PETRI_DIFFERENCE_MINUEND_PLACES=157, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=122, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1506, PETRI_PLACES=166, PETRI_TRANSITIONS=143} [2024-11-19 09:55:38,113 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 80 predicate places. [2024-11-19 09:55:38,113 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 143 transitions, 1506 flow [2024-11-19 09:55:38,113 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 38.4) internal successors, (192), 5 states have internal predecessors, (192), 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) [2024-11-19 09:55:38,113 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:38,114 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:38,114 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-19 09:55:38,114 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:38,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:38,114 INFO L85 PathProgramCache]: Analyzing trace with hash 2087372679, now seen corresponding path program 1 times [2024-11-19 09:55:38,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:38,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [998482073] [2024-11-19 09:55:38,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:38,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:38,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:38,242 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:55:38,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:38,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [998482073] [2024-11-19 09:55:38,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [998482073] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:38,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426885460] [2024-11-19 09:55:38,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:38,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:38,243 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:38,245 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:38,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-19 09:55:38,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:38,349 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 09:55:38,350 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:38,445 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:55:38,445 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:38,533 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-19 09:55:38,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426885460] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:55:38,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:55:38,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-19 09:55:38,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1371225150] [2024-11-19 09:55:38,535 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:55:38,535 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:55:38,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:38,535 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:55:38,535 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:55:38,765 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-19 09:55:38,766 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 143 transitions, 1506 flow. Second operand has 17 states, 17 states have (on average 38.64705882352941) internal successors, (657), 17 states have internal predecessors, (657), 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) [2024-11-19 09:55:38,766 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:38,766 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-19 09:55:38,766 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:39,914 INFO L124 PetriNetUnfolderBase]: 6687/10895 cut-off events. [2024-11-19 09:55:39,914 INFO L125 PetriNetUnfolderBase]: For 35674/36443 co-relation queries the response was YES. [2024-11-19 09:55:39,975 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37047 conditions, 10895 events. 6687/10895 cut-off events. For 35674/36443 co-relation queries the response was YES. Maximal size of possible extension queue 374. Compared 70861 event pairs, 3941 based on Foata normal form. 161/9753 useless extension candidates. Maximal degree in co-relation 26467. Up to 6446 conditions per place. [2024-11-19 09:55:40,022 INFO L140 encePairwiseOnDemand]: 75/89 looper letters, 143 selfloop transitions, 61 changer transitions 0/222 dead transitions. [2024-11-19 09:55:40,023 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 222 transitions, 2373 flow [2024-11-19 09:55:40,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-19 09:55:40,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-19 09:55:40,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 692 transitions. [2024-11-19 09:55:40,024 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5183520599250936 [2024-11-19 09:55:40,024 INFO L175 Difference]: Start difference. First operand has 166 places, 143 transitions, 1506 flow. Second operand 15 states and 692 transitions. [2024-11-19 09:55:40,024 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 222 transitions, 2373 flow [2024-11-19 09:55:40,071 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 222 transitions, 2365 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-19 09:55:40,073 INFO L231 Difference]: Finished difference. Result has 183 places, 147 transitions, 1693 flow [2024-11-19 09:55:40,073 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1504, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=143, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1693, PETRI_PLACES=183, PETRI_TRANSITIONS=147} [2024-11-19 09:55:40,074 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 97 predicate places. [2024-11-19 09:55:40,074 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 147 transitions, 1693 flow [2024-11-19 09:55:40,074 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 38.64705882352941) internal successors, (657), 17 states have internal predecessors, (657), 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) [2024-11-19 09:55:40,074 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:40,075 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:40,089 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-19 09:55:40,275 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:40,275 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:40,275 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:40,276 INFO L85 PathProgramCache]: Analyzing trace with hash 37308115, now seen corresponding path program 1 times [2024-11-19 09:55:40,276 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:40,276 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94524977] [2024-11-19 09:55:40,276 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:40,276 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:40,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:40,380 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-19 09:55:40,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:40,381 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94524977] [2024-11-19 09:55:40,381 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94524977] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:40,381 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:40,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:55:40,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44264329] [2024-11-19 09:55:40,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:40,383 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-19 09:55:40,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:40,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-19 09:55:40,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-19 09:55:40,472 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-19 09:55:40,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 147 transitions, 1693 flow. Second operand has 6 states, 6 states have (on average 41.0) internal successors, (246), 6 states have internal predecessors, (246), 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) [2024-11-19 09:55:40,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:40,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-19 09:55:40,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:41,928 INFO L124 PetriNetUnfolderBase]: 10673/16948 cut-off events. [2024-11-19 09:55:41,929 INFO L125 PetriNetUnfolderBase]: For 59436/61031 co-relation queries the response was YES. [2024-11-19 09:55:42,032 INFO L83 FinitePrefix]: Finished finitePrefix Result has 59507 conditions, 16948 events. 10673/16948 cut-off events. For 59436/61031 co-relation queries the response was YES. Maximal size of possible extension queue 660. Compared 116785 event pairs, 1516 based on Foata normal form. 524/15377 useless extension candidates. Maximal degree in co-relation 41418. Up to 7461 conditions per place. [2024-11-19 09:55:42,093 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 182 selfloop transitions, 17 changer transitions 24/242 dead transitions. [2024-11-19 09:55:42,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 242 transitions, 2746 flow [2024-11-19 09:55:42,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-19 09:55:42,094 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-19 09:55:42,094 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 368 transitions. [2024-11-19 09:55:42,094 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5906902086677368 [2024-11-19 09:55:42,095 INFO L175 Difference]: Start difference. First operand has 183 places, 147 transitions, 1693 flow. Second operand 7 states and 368 transitions. [2024-11-19 09:55:42,095 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 242 transitions, 2746 flow [2024-11-19 09:55:42,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 242 transitions, 2647 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-11-19 09:55:42,160 INFO L231 Difference]: Finished difference. Result has 181 places, 137 transitions, 1387 flow [2024-11-19 09:55:42,160 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1604, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1387, PETRI_PLACES=181, PETRI_TRANSITIONS=137} [2024-11-19 09:55:42,160 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 95 predicate places. [2024-11-19 09:55:42,161 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 137 transitions, 1387 flow [2024-11-19 09:55:42,161 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.0) internal successors, (246), 6 states have internal predecessors, (246), 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) [2024-11-19 09:55:42,161 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:42,161 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:42,161 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-19 09:55:42,161 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:42,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:42,161 INFO L85 PathProgramCache]: Analyzing trace with hash 2023337642, now seen corresponding path program 1 times [2024-11-19 09:55:42,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:42,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536975607] [2024-11-19 09:55:42,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:42,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:42,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:42,288 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 09:55:42,289 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:42,289 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536975607] [2024-11-19 09:55:42,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536975607] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:42,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:42,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:55:42,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444199372] [2024-11-19 09:55:42,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:42,290 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:55:42,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:42,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:55:42,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:55:42,350 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-19 09:55:42,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 137 transitions, 1387 flow. Second operand has 7 states, 7 states have (on average 40.142857142857146) internal successors, (281), 7 states have internal predecessors, (281), 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) [2024-11-19 09:55:42,351 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:42,351 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-19 09:55:42,351 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:44,874 INFO L124 PetriNetUnfolderBase]: 15637/24840 cut-off events. [2024-11-19 09:55:44,874 INFO L125 PetriNetUnfolderBase]: For 75831/77816 co-relation queries the response was YES. [2024-11-19 09:55:45,071 INFO L83 FinitePrefix]: Finished finitePrefix Result has 90380 conditions, 24840 events. 15637/24840 cut-off events. For 75831/77816 co-relation queries the response was YES. Maximal size of possible extension queue 1003. Compared 187661 event pairs, 4878 based on Foata normal form. 863/23214 useless extension candidates. Maximal degree in co-relation 68148. Up to 12156 conditions per place. [2024-11-19 09:55:45,168 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 211 selfloop transitions, 31 changer transitions 0/262 dead transitions. [2024-11-19 09:55:45,168 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 262 transitions, 2685 flow [2024-11-19 09:55:45,168 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:55:45,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:55:45,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 418 transitions. [2024-11-19 09:55:45,169 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5870786516853933 [2024-11-19 09:55:45,169 INFO L175 Difference]: Start difference. First operand has 181 places, 137 transitions, 1387 flow. Second operand 8 states and 418 transitions. [2024-11-19 09:55:45,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 262 transitions, 2685 flow [2024-11-19 09:55:45,386 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 262 transitions, 2417 flow, removed 28 selfloop flow, removed 24 redundant places. [2024-11-19 09:55:45,389 INFO L231 Difference]: Finished difference. Result has 158 places, 155 transitions, 1482 flow [2024-11-19 09:55:45,389 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1215, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=137, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1482, PETRI_PLACES=158, PETRI_TRANSITIONS=155} [2024-11-19 09:55:45,389 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 72 predicate places. [2024-11-19 09:55:45,389 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 155 transitions, 1482 flow [2024-11-19 09:55:45,390 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.142857142857146) internal successors, (281), 7 states have internal predecessors, (281), 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) [2024-11-19 09:55:45,390 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:45,390 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:45,390 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-19 09:55:45,390 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:45,391 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:45,391 INFO L85 PathProgramCache]: Analyzing trace with hash -1454380344, now seen corresponding path program 2 times [2024-11-19 09:55:45,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:45,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493593627] [2024-11-19 09:55:45,391 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:55:45,391 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:45,403 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:55:45,404 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:55:45,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 09:55:45,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:45,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493593627] [2024-11-19 09:55:45,496 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [493593627] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:45,496 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:45,496 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:55:45,496 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430454180] [2024-11-19 09:55:45,496 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:45,497 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:55:45,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:45,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:55:45,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:55:45,579 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-19 09:55:45,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 158 places, 155 transitions, 1482 flow. Second operand has 7 states, 7 states have (on average 40.142857142857146) internal successors, (281), 7 states have internal predecessors, (281), 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) [2024-11-19 09:55:45,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:45,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-19 09:55:45,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:48,625 INFO L124 PetriNetUnfolderBase]: 18773/29647 cut-off events. [2024-11-19 09:55:48,626 INFO L125 PetriNetUnfolderBase]: For 68607/70694 co-relation queries the response was YES. [2024-11-19 09:55:48,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 103685 conditions, 29647 events. 18773/29647 cut-off events. For 68607/70694 co-relation queries the response was YES. Maximal size of possible extension queue 1181. Compared 226121 event pairs, 4820 based on Foata normal form. 1193/26881 useless extension candidates. Maximal degree in co-relation 78074. Up to 10232 conditions per place. [2024-11-19 09:55:48,940 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 224 selfloop transitions, 31 changer transitions 0/275 dead transitions. [2024-11-19 09:55:48,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 275 transitions, 2722 flow [2024-11-19 09:55:48,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:55:48,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:55:48,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 418 transitions. [2024-11-19 09:55:48,941 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5870786516853933 [2024-11-19 09:55:48,941 INFO L175 Difference]: Start difference. First operand has 158 places, 155 transitions, 1482 flow. Second operand 8 states and 418 transitions. [2024-11-19 09:55:48,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 275 transitions, 2722 flow [2024-11-19 09:55:49,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 275 transitions, 2679 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-19 09:55:49,879 INFO L231 Difference]: Finished difference. Result has 166 places, 165 transitions, 1664 flow [2024-11-19 09:55:49,879 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1445, PETRI_DIFFERENCE_MINUEND_PLACES=155, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=155, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1664, PETRI_PLACES=166, PETRI_TRANSITIONS=165} [2024-11-19 09:55:49,880 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 80 predicate places. [2024-11-19 09:55:49,880 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 165 transitions, 1664 flow [2024-11-19 09:55:49,880 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.142857142857146) internal successors, (281), 7 states have internal predecessors, (281), 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) [2024-11-19 09:55:49,880 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:49,880 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:49,880 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-19 09:55:49,881 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:49,881 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:49,881 INFO L85 PathProgramCache]: Analyzing trace with hash -1136087720, now seen corresponding path program 3 times [2024-11-19 09:55:49,881 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:49,881 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545800703] [2024-11-19 09:55:49,881 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-19 09:55:49,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:49,896 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-19 09:55:49,896 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:55:49,992 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-19 09:55:49,992 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:49,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545800703] [2024-11-19 09:55:49,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [545800703] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:55:49,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:55:49,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-19 09:55:49,993 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950146760] [2024-11-19 09:55:49,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:55:49,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-19 09:55:49,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:49,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-19 09:55:49,993 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-19 09:55:50,080 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-19 09:55:50,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 165 transitions, 1664 flow. Second operand has 7 states, 7 states have (on average 40.142857142857146) internal successors, (281), 7 states have internal predecessors, (281), 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) [2024-11-19 09:55:50,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:50,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-19 09:55:50,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:55:53,709 INFO L124 PetriNetUnfolderBase]: 18771/29041 cut-off events. [2024-11-19 09:55:53,709 INFO L125 PetriNetUnfolderBase]: For 93158/95637 co-relation queries the response was YES. [2024-11-19 09:55:53,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 108395 conditions, 29041 events. 18771/29041 cut-off events. For 93158/95637 co-relation queries the response was YES. Maximal size of possible extension queue 1124. Compared 212290 event pairs, 1928 based on Foata normal form. 1346/26632 useless extension candidates. Maximal degree in co-relation 79559. Up to 13772 conditions per place. [2024-11-19 09:55:53,950 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 229 selfloop transitions, 47 changer transitions 0/296 dead transitions. [2024-11-19 09:55:53,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 296 transitions, 2993 flow [2024-11-19 09:55:53,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-19 09:55:53,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-19 09:55:53,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 471 transitions. [2024-11-19 09:55:53,951 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5880149812734082 [2024-11-19 09:55:53,951 INFO L175 Difference]: Start difference. First operand has 166 places, 165 transitions, 1664 flow. Second operand 9 states and 471 transitions. [2024-11-19 09:55:53,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 296 transitions, 2993 flow [2024-11-19 09:55:54,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 296 transitions, 2957 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-11-19 09:55:54,697 INFO L231 Difference]: Finished difference. Result has 174 places, 170 transitions, 1796 flow [2024-11-19 09:55:54,698 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=89, PETRI_DIFFERENCE_MINUEND_FLOW=1628, PETRI_DIFFERENCE_MINUEND_PLACES=164, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1796, PETRI_PLACES=174, PETRI_TRANSITIONS=170} [2024-11-19 09:55:54,698 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 88 predicate places. [2024-11-19 09:55:54,698 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 170 transitions, 1796 flow [2024-11-19 09:55:54,698 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 40.142857142857146) internal successors, (281), 7 states have internal predecessors, (281), 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) [2024-11-19 09:55:54,698 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:55:54,699 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:55:54,699 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-19 09:55:54,699 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-19 09:55:54,699 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:55:54,699 INFO L85 PathProgramCache]: Analyzing trace with hash 1033410799, now seen corresponding path program 1 times [2024-11-19 09:55:54,699 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:55:54,699 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337129657] [2024-11-19 09:55:54,699 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:54,699 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:55:54,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-19 09:55:55,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:55:55,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337129657] [2024-11-19 09:55:55,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [337129657] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:55:55,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [413873782] [2024-11-19 09:55:55,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:55:55,107 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:55:55,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:55:55,109 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:55:55,109 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-19 09:55:55,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:55:55,223 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-19 09:55:55,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:55:55,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-19 09:55:55,261 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 [2024-11-19 09:55:55,340 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-19 09:55:55,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 31 treesize of output 28 [2024-11-19 09:55:55,365 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-19 09:55:55,366 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 [2024-11-19 09:55:55,821 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-19 09:55:55,821 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:55:56,187 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-19 09:55:56,193 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-19 09:55:56,193 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [413873782] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:55:56,193 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:55:56,193 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 27 [2024-11-19 09:55:56,193 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055169576] [2024-11-19 09:55:56,193 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:55:56,194 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-19 09:55:56,194 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:55:56,194 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-19 09:55:56,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2024-11-19 09:55:57,644 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 89 [2024-11-19 09:55:57,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 170 transitions, 1796 flow. Second operand has 28 states, 28 states have (on average 31.642857142857142) internal successors, (886), 28 states have internal predecessors, (886), 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) [2024-11-19 09:55:57,645 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:55:57,645 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 89 [2024-11-19 09:55:57,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand