./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 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-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-803cd42-m [2024-11-22 21:52:27,584 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:52:27,653 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:52:27,659 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:52:27,660 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:52:27,695 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:52:27,697 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:52:27,698 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:52:27,699 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:52:27,700 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:52:27,701 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:52:27,701 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:52:27,702 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:52:27,702 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:52:27,702 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:52:27,705 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:52:27,706 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:52:27,706 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:52:27,707 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:52:27,707 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:52:27,707 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:52:27,707 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:52:27,708 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:52:27,708 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:52:27,708 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:52:27,708 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:52:27,708 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:52:27,709 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:52:27,709 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:52:27,709 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:52:27,709 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:52:27,710 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:52:27,710 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:52:27,710 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:52:27,710 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:52:27,710 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:52:27,711 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:52:27,711 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:52:27,712 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:52:27,712 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:52:27,712 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:52:27,713 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:52:27,714 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 632917bb2a5e88c193ba7761220e89039206b92cb89d98172ae8e9ad69d27ca8 [2024-11-22 21:52:28,019 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:52:28,047 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:52:28,052 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:52:28,053 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:52:28,053 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:52:28,055 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2024-11-22 21:52:29,538 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:52:29,738 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:52:29,739 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-three-array-min.wvr.c [2024-11-22 21:52:29,747 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55b0b28ee/2dc9a39cd3de454d9c2753557b0eaf84/FLAG51b775231 [2024-11-22 21:52:29,761 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/55b0b28ee/2dc9a39cd3de454d9c2753557b0eaf84 [2024-11-22 21:52:29,764 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:52:29,765 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:52:29,766 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:52:29,766 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:52:29,772 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:52:29,773 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:52:29" (1/1) ... [2024-11-22 21:52:29,774 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5d2d5b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:29, skipping insertion in model container [2024-11-22 21:52:29,776 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:52:29" (1/1) ... [2024-11-22 21:52:29,804 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:52:30,046 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:52:30,052 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:52:30,063 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:52:30,093 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:52:30,114 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:52:30,115 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:30 WrapperNode [2024-11-22 21:52:30,115 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:52:30,117 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:52:30,120 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:52:30,120 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:52:30,127 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:30" (1/1) ... [2024-11-22 21:52:30,139 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:30" (1/1) ... [2024-11-22 21:52:30,167 INFO L138 Inliner]: procedures = 25, calls = 43, calls flagged for inlining = 15, calls inlined = 23, statements flattened = 224 [2024-11-22 21:52:30,168 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:52:30,169 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:52:30,169 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:52:30,169 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:52:30,181 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:30" (1/1) ... [2024-11-22 21:52:30,181 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:30" (1/1) ... [2024-11-22 21:52:30,185 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:30" (1/1) ... [2024-11-22 21:52:30,205 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]. [2024-11-22 21:52:30,205 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:30" (1/1) ... [2024-11-22 21:52:30,206 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:30" (1/1) ... [2024-11-22 21:52:30,221 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:30" (1/1) ... [2024-11-22 21:52:30,228 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:30" (1/1) ... [2024-11-22 21:52:30,233 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:30" (1/1) ... [2024-11-22 21:52:30,236 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:30" (1/1) ... [2024-11-22 21:52:30,240 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:52:30,241 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:52:30,241 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:52:30,241 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:52:30,242 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:30" (1/1) ... [2024-11-22 21:52:30,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:52:30,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:30,288 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 21:52:30,290 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 21:52:30,331 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:52:30,331 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:52:30,331 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:52:30,331 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:52:30,331 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:52:30,331 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-22 21:52:30,331 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-22 21:52:30,331 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:52:30,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:52:30,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:52:30,332 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:52:30,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-22 21:52:30,332 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-22 21:52:30,332 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:52:30,333 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:52:30,333 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:52:30,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:52:30,333 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:52:30,334 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:52:30,432 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:52:30,434 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:52:31,000 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:52:31,000 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:52:31,403 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:52:31,404 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-22 21:52:31,404 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:52:31 BoogieIcfgContainer [2024-11-22 21:52:31,405 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:52:31,408 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:52:31,409 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:52:31,412 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:52:31,414 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:52:29" (1/3) ... [2024-11-22 21:52:31,415 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b1f8bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:52:31, skipping insertion in model container [2024-11-22 21:52:31,415 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:52:30" (2/3) ... [2024-11-22 21:52:31,416 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5b1f8bc4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:52:31, skipping insertion in model container [2024-11-22 21:52:31,416 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:52:31" (3/3) ... [2024-11-22 21:52:31,417 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-three-array-min.wvr.c [2024-11-22 21:52:31,437 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:52:31,437 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 34 error locations. [2024-11-22 21:52:31,437 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:52:31,528 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-22 21:52:31,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 90 places, 89 transitions, 199 flow [2024-11-22 21:52:31,612 INFO L124 PetriNetUnfolderBase]: 9/86 cut-off events. [2024-11-22 21:52:31,612 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-22 21:52:31,618 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. [2024-11-22 21:52:31,619 INFO L82 GeneralOperation]: Start removeDead. Operand has 90 places, 89 transitions, 199 flow [2024-11-22 21:52:31,624 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 86 places, 85 transitions, 188 flow [2024-11-22 21:52:31,636 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:52:31,644 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;@553c981, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:52:31,645 INFO L334 AbstractCegarLoop]: Starting to check reachability of 55 error locations. [2024-11-22 21:52:31,647 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:52:31,648 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:52:31,648 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:52:31,648 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:31,649 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:52:31,649 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:52:31,654 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:31,655 INFO L85 PathProgramCache]: Analyzing trace with hash 904789, now seen corresponding path program 1 times [2024-11-22 21:52:31,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:31,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1636809513] [2024-11-22 21:52:31,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:31,665 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:31,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:31,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:31,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:31,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1636809513] [2024-11-22 21:52:31,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1636809513] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:31,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:52:31,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:52:31,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1329405310] [2024-11-22 21:52:31,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:31,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:52:31,910 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:31,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:52:31,937 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:52:31,981 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-22 21:52:31,984 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) [2024-11-22 21:52:31,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:31,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-22 21:52:31,986 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:32,646 INFO L124 PetriNetUnfolderBase]: 2958/4632 cut-off events. [2024-11-22 21:52:32,647 INFO L125 PetriNetUnfolderBase]: For 178/178 co-relation queries the response was YES. [2024-11-22 21:52:32,662 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. [2024-11-22 21:52:32,694 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 46 selfloop transitions, 2 changer transitions 0/78 dead transitions. [2024-11-22 21:52:32,694 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 270 flow [2024-11-22 21:52:32,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:52:32,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:52:32,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 156 transitions. [2024-11-22 21:52:32,706 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5842696629213483 [2024-11-22 21:52:32,708 INFO L175 Difference]: Start difference. First operand has 86 places, 85 transitions, 188 flow. Second operand 3 states and 156 transitions. [2024-11-22 21:52:32,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 270 flow [2024-11-22 21:52:32,718 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 78 transitions, 258 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:52:32,721 INFO L231 Difference]: Finished difference. Result has 75 places, 78 transitions, 166 flow [2024-11-22 21:52:32,723 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} [2024-11-22 21:52:32,727 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -11 predicate places. [2024-11-22 21:52:32,728 INFO L471 AbstractCegarLoop]: Abstraction has has 75 places, 78 transitions, 166 flow [2024-11-22 21:52:32,728 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) [2024-11-22 21:52:32,729 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:32,729 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:52:32,729 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:52:32,730 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:52:32,730 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:32,730 INFO L85 PathProgramCache]: Analyzing trace with hash 904790, now seen corresponding path program 1 times [2024-11-22 21:52:32,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:32,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [265384580] [2024-11-22 21:52:32,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:32,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:32,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:33,042 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:33,043 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:33,043 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [265384580] [2024-11-22 21:52:33,043 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [265384580] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:33,043 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:52:33,043 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:52:33,043 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695037358] [2024-11-22 21:52:33,044 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:33,045 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:52:33,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:33,049 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:52:33,050 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:52:33,122 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-22 21:52:33,123 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) [2024-11-22 21:52:33,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:33,124 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-22 21:52:33,124 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:33,674 INFO L124 PetriNetUnfolderBase]: 2958/4634 cut-off events. [2024-11-22 21:52:33,674 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-22 21:52:33,683 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. [2024-11-22 21:52:33,710 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 51 selfloop transitions, 2 changer transitions 0/80 dead transitions. [2024-11-22 21:52:33,710 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 80 transitions, 276 flow [2024-11-22 21:52:33,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:52:33,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:52:33,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 157 transitions. [2024-11-22 21:52:33,716 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5880149812734082 [2024-11-22 21:52:33,716 INFO L175 Difference]: Start difference. First operand has 75 places, 78 transitions, 166 flow. Second operand 3 states and 157 transitions. [2024-11-22 21:52:33,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 80 transitions, 276 flow [2024-11-22 21:52:33,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 80 transitions, 272 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:52:33,719 INFO L231 Difference]: Finished difference. Result has 76 places, 79 transitions, 176 flow [2024-11-22 21:52:33,720 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} [2024-11-22 21:52:33,720 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -10 predicate places. [2024-11-22 21:52:33,720 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 79 transitions, 176 flow [2024-11-22 21:52:33,721 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) [2024-11-22 21:52:33,721 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:33,721 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:52:33,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:52:33,723 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:52:33,724 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:33,724 INFO L85 PathProgramCache]: Analyzing trace with hash 869532509, now seen corresponding path program 1 times [2024-11-22 21:52:33,725 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:33,725 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654453837] [2024-11-22 21:52:33,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:33,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:33,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:33,994 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:33,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:33,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654453837] [2024-11-22 21:52:33,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1654453837] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:33,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575715348] [2024-11-22 21:52:33,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:33,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:33,998 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:33,999 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:34,002 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:52:34,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:34,074 INFO L255 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:52:34,079 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:34,144 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-22 21:52:34,346 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:34,346 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:34,522 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:34,523 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [575715348] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:34,523 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:34,524 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:52:34,524 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1669691652] [2024-11-22 21:52:34,524 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:34,524 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:52:34,525 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:34,525 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:52:34,526 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:52:34,918 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-22 21:52:34,920 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) [2024-11-22 21:52:34,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:34,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-22 21:52:34,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:35,630 INFO L124 PetriNetUnfolderBase]: 2958/4633 cut-off events. [2024-11-22 21:52:35,630 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-22 21:52:35,639 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. [2024-11-22 21:52:35,671 INFO L140 encePairwiseOnDemand]: 84/89 looper letters, 47 selfloop transitions, 5 changer transitions 0/79 dead transitions. [2024-11-22 21:52:35,671 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 79 transitions, 278 flow [2024-11-22 21:52:35,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:52:35,672 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:52:35,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 223 transitions. [2024-11-22 21:52:35,674 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.501123595505618 [2024-11-22 21:52:35,675 INFO L175 Difference]: Start difference. First operand has 76 places, 79 transitions, 176 flow. Second operand 5 states and 223 transitions. [2024-11-22 21:52:35,675 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 79 transitions, 278 flow [2024-11-22 21:52:35,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 79 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:52:35,678 INFO L231 Difference]: Finished difference. Result has 79 places, 79 transitions, 188 flow [2024-11-22 21:52:35,678 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} [2024-11-22 21:52:35,679 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -7 predicate places. [2024-11-22 21:52:35,680 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 79 transitions, 188 flow [2024-11-22 21:52:35,680 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) [2024-11-22 21:52:35,680 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:35,680 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 21:52:35,690 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:52:35,881 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:35,882 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:52:35,882 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:35,882 INFO L85 PathProgramCache]: Analyzing trace with hash 1185706500, now seen corresponding path program 1 times [2024-11-22 21:52:35,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:35,882 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793844002] [2024-11-22 21:52:35,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:35,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:35,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:36,087 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:36,087 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:36,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793844002] [2024-11-22 21:52:36,088 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793844002] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:36,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [808128082] [2024-11-22 21:52:36,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:36,088 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:36,088 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:36,091 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:36,093 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:52:36,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:36,165 INFO L255 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-22 21:52:36,167 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:36,181 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:52:36,289 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:52:36,290 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 [2024-11-22 21:52:36,322 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:36,322 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:36,401 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:36,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [808128082] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:36,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:52:36,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4, 3] total 9 [2024-11-22 21:52:36,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115927398] [2024-11-22 21:52:36,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:36,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:52:36,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:36,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:52:36,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:52:36,505 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-22 21:52:36,505 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) [2024-11-22 21:52:36,506 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:36,506 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-22 21:52:36,506 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:37,022 INFO L124 PetriNetUnfolderBase]: 2960/4639 cut-off events. [2024-11-22 21:52:37,023 INFO L125 PetriNetUnfolderBase]: For 52/52 co-relation queries the response was YES. [2024-11-22 21:52:37,030 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. [2024-11-22 21:52:37,051 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 51 selfloop transitions, 7 changer transitions 0/85 dead transitions. [2024-11-22 21:52:37,051 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 85 transitions, 316 flow [2024-11-22 21:52:37,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:52:37,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:52:37,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 196 transitions. [2024-11-22 21:52:37,053 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.550561797752809 [2024-11-22 21:52:37,053 INFO L175 Difference]: Start difference. First operand has 79 places, 79 transitions, 188 flow. Second operand 4 states and 196 transitions. [2024-11-22 21:52:37,053 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 85 transitions, 316 flow [2024-11-22 21:52:37,054 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 85 transitions, 306 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-22 21:52:37,056 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 225 flow [2024-11-22 21:52:37,056 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} [2024-11-22 21:52:37,057 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -5 predicate places. [2024-11-22 21:52:37,057 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 225 flow [2024-11-22 21:52:37,058 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) [2024-11-22 21:52:37,058 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:37,058 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:37,067 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 21:52:37,258 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 [2024-11-22 21:52:37,259 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:52:37,259 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:37,260 INFO L85 PathProgramCache]: Analyzing trace with hash -1897801947, now seen corresponding path program 1 times [2024-11-22 21:52:37,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:37,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082298782] [2024-11-22 21:52:37,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:37,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:37,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:37,354 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:37,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:37,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082298782] [2024-11-22 21:52:37,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082298782] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:37,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:52:37,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:52:37,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450689710] [2024-11-22 21:52:37,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:37,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:52:37,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:37,356 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:52:37,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:52:37,376 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-22 21:52:37,376 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) [2024-11-22 21:52:37,377 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:37,377 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-22 21:52:37,377 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:37,820 INFO L124 PetriNetUnfolderBase]: 2958/4637 cut-off events. [2024-11-22 21:52:37,820 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-22 21:52:37,826 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. [2024-11-22 21:52:37,841 INFO L140 encePairwiseOnDemand]: 82/89 looper letters, 48 selfloop transitions, 6 changer transitions 0/83 dead transitions. [2024-11-22 21:52:37,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 327 flow [2024-11-22 21:52:37,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:52:37,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:52:37,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 204 transitions. [2024-11-22 21:52:37,843 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5730337078651685 [2024-11-22 21:52:37,843 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 225 flow. Second operand 4 states and 204 transitions. [2024-11-22 21:52:37,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 327 flow [2024-11-22 21:52:37,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 321 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:52:37,845 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 221 flow [2024-11-22 21:52:37,846 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} [2024-11-22 21:52:37,849 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, -4 predicate places. [2024-11-22 21:52:37,849 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 221 flow [2024-11-22 21:52:37,850 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) [2024-11-22 21:52:37,850 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:37,850 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:37,850 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 21:52:37,850 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:52:37,851 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:37,851 INFO L85 PathProgramCache]: Analyzing trace with hash 1297642248, now seen corresponding path program 1 times [2024-11-22 21:52:37,851 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:37,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956199274] [2024-11-22 21:52:37,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:37,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:37,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:37,960 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:37,960 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:37,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956199274] [2024-11-22 21:52:37,961 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1956199274] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:37,961 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [189664733] [2024-11-22 21:52:37,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:37,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:37,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:37,964 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:37,965 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:52:38,027 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:38,028 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-22 21:52:38,029 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:38,085 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:38,085 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:38,134 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [189664733] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:38,134 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:38,134 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-22 21:52:38,134 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106087048] [2024-11-22 21:52:38,134 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:38,135 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-22 21:52:38,135 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:38,135 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-22 21:52:38,136 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2024-11-22 21:52:38,251 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-22 21:52:38,252 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) [2024-11-22 21:52:38,252 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:38,252 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-22 21:52:38,252 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:39,293 INFO L124 PetriNetUnfolderBase]: 5915/9273 cut-off events. [2024-11-22 21:52:39,293 INFO L125 PetriNetUnfolderBase]: For 113/113 co-relation queries the response was YES. [2024-11-22 21:52:39,309 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. [2024-11-22 21:52:39,353 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 85 selfloop transitions, 22 changer transitions 0/136 dead transitions. [2024-11-22 21:52:39,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 136 transitions, 592 flow [2024-11-22 21:52:39,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:52:39,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:52:39,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 405 transitions. [2024-11-22 21:52:39,414 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5688202247191011 [2024-11-22 21:52:39,414 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 221 flow. Second operand 8 states and 405 transitions. [2024-11-22 21:52:39,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 136 transitions, 592 flow [2024-11-22 21:52:39,415 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 136 transitions, 570 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:52:39,417 INFO L231 Difference]: Finished difference. Result has 88 places, 94 transitions, 338 flow [2024-11-22 21:52:39,418 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} [2024-11-22 21:52:39,418 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 2 predicate places. [2024-11-22 21:52:39,418 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 94 transitions, 338 flow [2024-11-22 21:52:39,419 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) [2024-11-22 21:52:39,419 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:39,419 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1] [2024-11-22 21:52:39,427 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-22 21:52:39,623 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:39,624 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:52:39,624 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:39,624 INFO L85 PathProgramCache]: Analyzing trace with hash 35474017, now seen corresponding path program 2 times [2024-11-22 21:52:39,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:39,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60837967] [2024-11-22 21:52:39,625 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:52:39,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:39,644 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:52:39,644 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:39,845 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:39,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:39,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60837967] [2024-11-22 21:52:39,846 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60837967] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:39,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852170519] [2024-11-22 21:52:39,846 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:52:39,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:39,847 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:39,849 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:39,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:52:39,922 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:52:39,922 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:39,924 INFO L255 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-22 21:52:39,926 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:39,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:52:40,081 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:52:40,082 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 [2024-11-22 21:52:40,159 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:40,160 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:40,338 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:52:40,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [852170519] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:40,339 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:40,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-22 21:52:40,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069482117] [2024-11-22 21:52:40,339 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:40,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-22 21:52:40,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:40,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-22 21:52:40,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=256, Unknown=0, NotChecked=0, Total=306 [2024-11-22 21:52:41,262 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-22 21:52:41,263 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) [2024-11-22 21:52:41,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:41,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-22 21:52:41,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:43,476 INFO L124 PetriNetUnfolderBase]: 8876/13921 cut-off events. [2024-11-22 21:52:43,478 INFO L125 PetriNetUnfolderBase]: For 173/173 co-relation queries the response was YES. [2024-11-22 21:52:43,522 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. [2024-11-22 21:52:43,595 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 96 selfloop transitions, 44 changer transitions 0/167 dead transitions. [2024-11-22 21:52:43,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 102 places, 167 transitions, 923 flow [2024-11-22 21:52:43,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-22 21:52:43,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-22 21:52:43,598 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 660 transitions. [2024-11-22 21:52:43,599 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4943820224719101 [2024-11-22 21:52:43,599 INFO L175 Difference]: Start difference. First operand has 88 places, 94 transitions, 338 flow. Second operand 15 states and 660 transitions. [2024-11-22 21:52:43,599 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 102 places, 167 transitions, 923 flow [2024-11-22 21:52:43,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 101 places, 167 transitions, 885 flow, removed 11 selfloop flow, removed 1 redundant places. [2024-11-22 21:52:43,605 INFO L231 Difference]: Finished difference. Result has 108 places, 119 transitions, 640 flow [2024-11-22 21:52:43,606 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} [2024-11-22 21:52:43,607 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 22 predicate places. [2024-11-22 21:52:43,607 INFO L471 AbstractCegarLoop]: Abstraction has has 108 places, 119 transitions, 640 flow [2024-11-22 21:52:43,608 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) [2024-11-22 21:52:43,609 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:43,609 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:43,618 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 21:52:43,809 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:43,810 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:52:43,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:43,811 INFO L85 PathProgramCache]: Analyzing trace with hash -938285925, now seen corresponding path program 1 times [2024-11-22 21:52:43,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:43,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1955822253] [2024-11-22 21:52:43,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:43,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:43,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:44,006 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:44,006 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:44,007 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1955822253] [2024-11-22 21:52:44,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1955822253] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:44,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:52:44,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:52:44,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160841381] [2024-11-22 21:52:44,008 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:44,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:52:44,009 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:44,009 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:52:44,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:52:44,078 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 89 [2024-11-22 21:52:44,079 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) [2024-11-22 21:52:44,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:44,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 89 [2024-11-22 21:52:44,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:45,398 INFO L124 PetriNetUnfolderBase]: 8975/14419 cut-off events. [2024-11-22 21:52:45,399 INFO L125 PetriNetUnfolderBase]: For 234/234 co-relation queries the response was YES. [2024-11-22 21:52:45,432 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. [2024-11-22 21:52:45,495 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 80 selfloop transitions, 11 changer transitions 0/114 dead transitions. [2024-11-22 21:52:45,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 114 transitions, 812 flow [2024-11-22 21:52:45,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:52:45,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:52:45,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 194 transitions. [2024-11-22 21:52:45,497 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.43595505617977526 [2024-11-22 21:52:45,497 INFO L175 Difference]: Start difference. First operand has 108 places, 119 transitions, 640 flow. Second operand 5 states and 194 transitions. [2024-11-22 21:52:45,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 114 transitions, 812 flow [2024-11-22 21:52:45,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 114 transitions, 761 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-11-22 21:52:45,630 INFO L231 Difference]: Finished difference. Result has 104 places, 114 transitions, 601 flow [2024-11-22 21:52:45,631 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} [2024-11-22 21:52:45,636 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2024-11-22 21:52:45,637 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 114 transitions, 601 flow [2024-11-22 21:52:45,637 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) [2024-11-22 21:52:45,637 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:45,637 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:45,637 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-22 21:52:45,637 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:52:45,638 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:45,638 INFO L85 PathProgramCache]: Analyzing trace with hash -938285924, now seen corresponding path program 1 times [2024-11-22 21:52:45,638 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:45,638 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251405686] [2024-11-22 21:52:45,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:45,638 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:45,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:46,044 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:52:46,045 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:46,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251405686] [2024-11-22 21:52:46,045 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1251405686] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:46,045 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1660883333] [2024-11-22 21:52:46,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:46,045 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:46,045 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:46,048 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:46,050 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:52:46,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:46,122 INFO L255 TraceCheckSpWp]: Trace formula consists of 162 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-22 21:52:46,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:46,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:52:46,139 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:52:46,190 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:52:46,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:52:46,206 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-22 21:52:46,330 INFO L349 Elim1Store]: treesize reduction 24, result has 44.2 percent of original size [2024-11-22 21:52:46,330 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 [2024-11-22 21:52:46,588 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:46,588 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:46,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:46,994 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1660883333] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:46,994 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:52:46,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 12 [2024-11-22 21:52:46,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313709347] [2024-11-22 21:52:46,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:46,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:52:46,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:46,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:52:46,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:52:47,262 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-22 21:52:47,263 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 114 transitions, 601 flow. Second operand has 6 states, 6 states have (on average 35.833333333333336) internal successors, (215), 6 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:47,263 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:47,263 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-22 21:52:47,263 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:48,884 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.32s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2024-11-22 21:52:50,419 INFO L124 PetriNetUnfolderBase]: 7997/12541 cut-off events. [2024-11-22 21:52:50,420 INFO L125 PetriNetUnfolderBase]: For 223/223 co-relation queries the response was YES. [2024-11-22 21:52:50,440 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23545 conditions, 12541 events. 7997/12541 cut-off events. For 223/223 co-relation queries the response was YES. Maximal size of possible extension queue 703. Compared 90628 event pairs, 5736 based on Foata normal form. 0/8926 useless extension candidates. Maximal degree in co-relation 23471. Up to 10504 conditions per place. [2024-11-22 21:52:50,481 INFO L140 encePairwiseOnDemand]: 83/89 looper letters, 77 selfloop transitions, 14 changer transitions 0/113 dead transitions. [2024-11-22 21:52:50,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 113 transitions, 787 flow [2024-11-22 21:52:50,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:52:50,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:52:50,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 256 transitions. [2024-11-22 21:52:50,483 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4794007490636704 [2024-11-22 21:52:50,483 INFO L175 Difference]: Start difference. First operand has 104 places, 114 transitions, 601 flow. Second operand 6 states and 256 transitions. [2024-11-22 21:52:50,483 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 113 transitions, 787 flow [2024-11-22 21:52:50,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 113 transitions, 772 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:52:50,488 INFO L231 Difference]: Finished difference. Result has 104 places, 112 transitions, 610 flow [2024-11-22 21:52:50,488 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} [2024-11-22 21:52:50,489 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 18 predicate places. [2024-11-22 21:52:50,489 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 112 transitions, 610 flow [2024-11-22 21:52:50,489 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 35.833333333333336) internal successors, (215), 6 states have internal predecessors, (215), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:52:50,489 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:50,490 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:50,499 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 21:52:50,693 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 [2024-11-22 21:52:50,694 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:52:50,694 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:50,694 INFO L85 PathProgramCache]: Analyzing trace with hash 977908366, now seen corresponding path program 1 times [2024-11-22 21:52:50,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:50,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666340] [2024-11-22 21:52:50,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:50,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:50,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:50,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:50,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666340] [2024-11-22 21:52:50,798 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [666340] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:50,798 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:52:50,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:52:50,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236270343] [2024-11-22 21:52:50,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:50,799 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:52:50,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:50,800 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:52:50,800 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:52:50,872 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 89 [2024-11-22 21:52:50,873 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) [2024-11-22 21:52:50,873 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:50,873 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 89 [2024-11-22 21:52:50,873 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:51,816 INFO L124 PetriNetUnfolderBase]: 8132/12709 cut-off events. [2024-11-22 21:52:51,817 INFO L125 PetriNetUnfolderBase]: For 214/214 co-relation queries the response was YES. [2024-11-22 21:52:51,834 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. [2024-11-22 21:52:51,871 INFO L140 encePairwiseOnDemand]: 81/89 looper letters, 76 selfloop transitions, 13 changer transitions 0/107 dead transitions. [2024-11-22 21:52:51,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 107 transitions, 778 flow [2024-11-22 21:52:51,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:52:51,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:52:51,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 197 transitions. [2024-11-22 21:52:51,873 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44269662921348313 [2024-11-22 21:52:51,873 INFO L175 Difference]: Start difference. First operand has 104 places, 112 transitions, 610 flow. Second operand 5 states and 197 transitions. [2024-11-22 21:52:51,873 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 107 transitions, 778 flow [2024-11-22 21:52:51,875 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 107 transitions, 763 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:52:51,877 INFO L231 Difference]: Finished difference. Result has 100 places, 107 transitions, 611 flow [2024-11-22 21:52:51,877 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} [2024-11-22 21:52:51,878 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 14 predicate places. [2024-11-22 21:52:51,878 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 107 transitions, 611 flow [2024-11-22 21:52:51,878 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) [2024-11-22 21:52:51,878 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:51,878 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:51,878 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-22 21:52:51,878 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:52:51,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:51,879 INFO L85 PathProgramCache]: Analyzing trace with hash 977908367, now seen corresponding path program 1 times [2024-11-22 21:52:51,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:51,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935299471] [2024-11-22 21:52:51,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:51,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:51,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:52,065 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:52,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:52,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935299471] [2024-11-22 21:52:52,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935299471] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:52,066 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492439914] [2024-11-22 21:52:52,066 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:52,066 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:52,067 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:52,069 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:52,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:52:52,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:52,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:52:52,154 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:52,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:52:52,207 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:52:52,208 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 [2024-11-22 21:52:52,218 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:52:52,218 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:52:52,246 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:52,247 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:52,321 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 [2024-11-22 21:52:52,389 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:52,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1492439914] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:52,390 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:52,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-22 21:52:52,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1580990231] [2024-11-22 21:52:52,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:52,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-22 21:52:52,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:52,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-22 21:52:52,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:52:52,824 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 32 out of 89 [2024-11-22 21:52:52,825 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) [2024-11-22 21:52:52,825 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:52,825 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 32 of 89 [2024-11-22 21:52:52,825 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:53,809 INFO L124 PetriNetUnfolderBase]: 7118/11161 cut-off events. [2024-11-22 21:52:53,809 INFO L125 PetriNetUnfolderBase]: For 215/215 co-relation queries the response was YES. [2024-11-22 21:52:53,829 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. [2024-11-22 21:52:53,856 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 67 selfloop transitions, 23 changer transitions 0/107 dead transitions. [2024-11-22 21:52:53,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 107 transitions, 803 flow [2024-11-22 21:52:53,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:52:53,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:52:53,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 310 transitions. [2024-11-22 21:52:53,858 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4353932584269663 [2024-11-22 21:52:53,858 INFO L175 Difference]: Start difference. First operand has 100 places, 107 transitions, 611 flow. Second operand 8 states and 310 transitions. [2024-11-22 21:52:53,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 107 transitions, 803 flow [2024-11-22 21:52:53,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 107 transitions, 784 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:52:53,862 INFO L231 Difference]: Finished difference. Result has 102 places, 105 transitions, 634 flow [2024-11-22 21:52:53,862 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} [2024-11-22 21:52:53,863 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 16 predicate places. [2024-11-22 21:52:53,863 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 105 transitions, 634 flow [2024-11-22 21:52:53,863 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) [2024-11-22 21:52:53,864 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:53,864 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 1, 1, 1] [2024-11-22 21:52:53,872 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 21:52:54,067 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 [2024-11-22 21:52:54,068 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:52:54,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:54,068 INFO L85 PathProgramCache]: Analyzing trace with hash 2103192318, now seen corresponding path program 3 times [2024-11-22 21:52:54,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:54,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034032359] [2024-11-22 21:52:54,068 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:52:54,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:54,092 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:52:54,092 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:54,293 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:52:54,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:54,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034032359] [2024-11-22 21:52:54,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034032359] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:54,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056690491] [2024-11-22 21:52:54,294 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:52:54,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:54,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:54,296 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:52:54,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:52:54,385 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:52:54,385 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:52:54,386 INFO L255 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-22 21:52:54,388 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:54,395 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:52:54,508 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:52:54,508 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 [2024-11-22 21:52:54,629 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:52:54,630 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:54,806 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:52:54,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056690491] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:54,807 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:54,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-22 21:52:54,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457214640] [2024-11-22 21:52:54,807 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:54,807 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:52:54,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:54,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:52:54,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:52:55,734 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-22 21:52:55,735 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) [2024-11-22 21:52:55,735 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:55,735 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-22 21:52:55,735 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:56,873 INFO L124 PetriNetUnfolderBase]: 7118/11157 cut-off events. [2024-11-22 21:52:56,873 INFO L125 PetriNetUnfolderBase]: For 233/233 co-relation queries the response was YES. [2024-11-22 21:52:56,889 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. [2024-11-22 21:52:56,916 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 37 selfloop transitions, 53 changer transitions 0/105 dead transitions. [2024-11-22 21:52:56,916 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 105 transitions, 806 flow [2024-11-22 21:52:56,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:52:56,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:52:56,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 292 transitions. [2024-11-22 21:52:56,918 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46869983948635635 [2024-11-22 21:52:56,918 INFO L175 Difference]: Start difference. First operand has 102 places, 105 transitions, 634 flow. Second operand 7 states and 292 transitions. [2024-11-22 21:52:56,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 105 transitions, 806 flow [2024-11-22 21:52:56,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 105 transitions, 749 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-11-22 21:52:56,922 INFO L231 Difference]: Finished difference. Result has 98 places, 105 transitions, 675 flow [2024-11-22 21:52:56,922 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} [2024-11-22 21:52:56,922 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 12 predicate places. [2024-11-22 21:52:56,923 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 105 transitions, 675 flow [2024-11-22 21:52:56,923 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) [2024-11-22 21:52:56,923 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:56,923 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:56,932 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-22 21:52:57,123 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 [2024-11-22 21:52:57,124 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:52:57,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:57,124 INFO L85 PathProgramCache]: Analyzing trace with hash -1136642886, now seen corresponding path program 1 times [2024-11-22 21:52:57,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:57,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506098649] [2024-11-22 21:52:57,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:57,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:57,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:57,226 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:57,226 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:57,226 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506098649] [2024-11-22 21:52:57,227 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506098649] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:57,227 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902063642] [2024-11-22 21:52:57,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:57,227 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:57,227 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:57,229 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) [2024-11-22 21:52:57,231 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 21:52:57,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:57,315 INFO L255 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-22 21:52:57,316 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:57,367 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:57,367 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:57,419 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:57,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [902063642] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:57,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:57,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-22 21:52:57,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716663551] [2024-11-22 21:52:57,420 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:57,422 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 21:52:57,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:57,423 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 21:52:57,423 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:52:57,525 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-22 21:52:57,526 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) [2024-11-22 21:52:57,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:57,527 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-22 21:52:57,527 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:58,182 INFO L124 PetriNetUnfolderBase]: 4452/7131 cut-off events. [2024-11-22 21:52:58,182 INFO L125 PetriNetUnfolderBase]: For 119/119 co-relation queries the response was YES. [2024-11-22 21:52:58,190 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. [2024-11-22 21:52:58,202 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 95 selfloop transitions, 44 changer transitions 0/153 dead transitions. [2024-11-22 21:52:58,202 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 153 transitions, 1057 flow [2024-11-22 21:52:58,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:52:58,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:52:58,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 440 transitions. [2024-11-22 21:52:58,204 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5493133583021224 [2024-11-22 21:52:58,204 INFO L175 Difference]: Start difference. First operand has 98 places, 105 transitions, 675 flow. Second operand 9 states and 440 transitions. [2024-11-22 21:52:58,204 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 153 transitions, 1057 flow [2024-11-22 21:52:58,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 153 transitions, 1044 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-22 21:52:58,209 INFO L231 Difference]: Finished difference. Result has 107 places, 107 transitions, 767 flow [2024-11-22 21:52:58,209 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} [2024-11-22 21:52:58,210 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 21 predicate places. [2024-11-22 21:52:58,210 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 107 transitions, 767 flow [2024-11-22 21:52:58,210 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) [2024-11-22 21:52:58,210 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:58,211 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:58,219 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-22 21:52:58,413 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 [2024-11-22 21:52:58,413 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:52:58,414 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:58,414 INFO L85 PathProgramCache]: Analyzing trace with hash -1465569679, now seen corresponding path program 1 times [2024-11-22 21:52:58,414 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:58,414 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1671406696] [2024-11-22 21:52:58,414 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:58,414 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:58,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:58,515 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:58,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:58,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1671406696] [2024-11-22 21:52:58,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1671406696] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:52:58,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [357962069] [2024-11-22 21:52:58,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:58,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:52:58,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:52:58,519 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) [2024-11-22 21:52:58,520 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 21:52:58,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:58,613 INFO L255 TraceCheckSpWp]: Trace formula consists of 235 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-22 21:52:58,614 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:52:58,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:58,686 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:52:58,737 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:58,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [357962069] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:52:58,737 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:52:58,737 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-22 21:52:58,737 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075105858] [2024-11-22 21:52:58,737 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:52:58,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 21:52:58,738 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:58,738 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 21:52:58,738 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:52:58,791 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-22 21:52:58,792 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) [2024-11-22 21:52:58,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:58,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-22 21:52:58,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:59,195 INFO L124 PetriNetUnfolderBase]: 3255/5237 cut-off events. [2024-11-22 21:52:59,196 INFO L125 PetriNetUnfolderBase]: For 933/1058 co-relation queries the response was YES. [2024-11-22 21:52:59,207 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. [2024-11-22 21:52:59,220 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 82 selfloop transitions, 44 changer transitions 0/140 dead transitions. [2024-11-22 21:52:59,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 140 transitions, 1101 flow [2024-11-22 21:52:59,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:52:59,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:52:59,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 427 transitions. [2024-11-22 21:52:59,222 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.533083645443196 [2024-11-22 21:52:59,222 INFO L175 Difference]: Start difference. First operand has 107 places, 107 transitions, 767 flow. Second operand 9 states and 427 transitions. [2024-11-22 21:52:59,222 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 140 transitions, 1101 flow [2024-11-22 21:52:59,225 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 140 transitions, 1020 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:52:59,227 INFO L231 Difference]: Finished difference. Result has 111 places, 109 transitions, 791 flow [2024-11-22 21:52:59,228 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} [2024-11-22 21:52:59,228 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 25 predicate places. [2024-11-22 21:52:59,228 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 109 transitions, 791 flow [2024-11-22 21:52:59,229 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) [2024-11-22 21:52:59,229 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:59,229 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:59,236 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-22 21:52:59,429 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 [2024-11-22 21:52:59,429 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread3Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:52:59,430 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:59,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1263889248, now seen corresponding path program 1 times [2024-11-22 21:52:59,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:59,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [850372298] [2024-11-22 21:52:59,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:52:59,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:59,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:52:59,538 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:52:59,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:52:59,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [850372298] [2024-11-22 21:52:59,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [850372298] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:52:59,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:52:59,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:52:59,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913831184] [2024-11-22 21:52:59,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:52:59,540 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:52:59,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:52:59,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:52:59,541 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:52:59,588 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-22 21:52:59,588 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) [2024-11-22 21:52:59,588 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:52:59,588 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-22 21:52:59,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:52:59,822 INFO L124 PetriNetUnfolderBase]: 2466/3897 cut-off events. [2024-11-22 21:52:59,822 INFO L125 PetriNetUnfolderBase]: For 1346/1447 co-relation queries the response was YES. [2024-11-22 21:52:59,829 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. [2024-11-22 21:52:59,837 INFO L140 encePairwiseOnDemand]: 85/89 looper letters, 84 selfloop transitions, 8 changer transitions 0/107 dead transitions. [2024-11-22 21:52:59,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 107 transitions, 971 flow [2024-11-22 21:52:59,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:52:59,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:52:59,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2024-11-22 21:52:59,839 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5112359550561798 [2024-11-22 21:52:59,839 INFO L175 Difference]: Start difference. First operand has 111 places, 109 transitions, 791 flow. Second operand 4 states and 182 transitions. [2024-11-22 21:52:59,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 107 transitions, 971 flow [2024-11-22 21:52:59,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 107 transitions, 890 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-22 21:52:59,845 INFO L231 Difference]: Finished difference. Result has 106 places, 107 transitions, 722 flow [2024-11-22 21:52:59,845 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} [2024-11-22 21:52:59,846 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 20 predicate places. [2024-11-22 21:52:59,846 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 107 transitions, 722 flow [2024-11-22 21:52:59,846 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) [2024-11-22 21:52:59,846 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:52:59,846 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:52:59,846 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-22 21:52:59,846 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:52:59,847 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:52:59,847 INFO L85 PathProgramCache]: Analyzing trace with hash -2069704291, now seen corresponding path program 2 times [2024-11-22 21:52:59,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:52:59,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795155550] [2024-11-22 21:52:59,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:52:59,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:52:59,867 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:52:59,867 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:00,138 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-22 21:53:00,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:00,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795155550] [2024-11-22 21:53:00,138 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795155550] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:00,138 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:00,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 21:53:00,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246129735] [2024-11-22 21:53:00,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:00,139 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 21:53:00,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:00,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 21:53:00,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-11-22 21:53:00,346 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 89 [2024-11-22 21:53:00,347 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) [2024-11-22 21:53:00,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:00,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 89 [2024-11-22 21:53:00,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:01,192 INFO L124 PetriNetUnfolderBase]: 5212/8161 cut-off events. [2024-11-22 21:53:01,192 INFO L125 PetriNetUnfolderBase]: For 1534/1739 co-relation queries the response was YES. [2024-11-22 21:53:01,212 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. [2024-11-22 21:53:01,237 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 132 selfloop transitions, 11 changer transitions 0/153 dead transitions. [2024-11-22 21:53:01,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 153 transitions, 1124 flow [2024-11-22 21:53:01,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:53:01,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:53:01,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 256 transitions. [2024-11-22 21:53:01,238 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41091492776886035 [2024-11-22 21:53:01,239 INFO L175 Difference]: Start difference. First operand has 106 places, 107 transitions, 722 flow. Second operand 7 states and 256 transitions. [2024-11-22 21:53:01,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 153 transitions, 1124 flow [2024-11-22 21:53:01,244 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 153 transitions, 1115 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:53:01,246 INFO L231 Difference]: Finished difference. Result has 112 places, 110 transitions, 762 flow [2024-11-22 21:53:01,246 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} [2024-11-22 21:53:01,247 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 26 predicate places. [2024-11-22 21:53:01,247 INFO L471 AbstractCegarLoop]: Abstraction has has 112 places, 110 transitions, 762 flow [2024-11-22 21:53:01,247 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) [2024-11-22 21:53:01,247 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:01,247 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:01,247 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-11-22 21:53:01,248 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:53:01,248 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:01,248 INFO L85 PathProgramCache]: Analyzing trace with hash -1263889247, now seen corresponding path program 1 times [2024-11-22 21:53:01,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:01,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [955060664] [2024-11-22 21:53:01,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:01,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:01,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:01,357 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:53:01,358 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:01,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [955060664] [2024-11-22 21:53:01,358 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [955060664] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:01,358 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657350835] [2024-11-22 21:53:01,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:01,359 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:01,359 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:01,361 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) [2024-11-22 21:53:01,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 21:53:01,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:01,459 INFO L255 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-22 21:53:01,460 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:01,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:53:01,518 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-22 21:53:01,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [657350835] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:01,573 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:01,573 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 11 [2024-11-22 21:53:01,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801496369] [2024-11-22 21:53:01,573 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:01,574 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 21:53:01,574 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:01,575 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 21:53:01,575 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:53:01,646 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-22 21:53:01,646 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) [2024-11-22 21:53:01,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:01,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-22 21:53:01,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:02,197 INFO L124 PetriNetUnfolderBase]: 4052/6543 cut-off events. [2024-11-22 21:53:02,197 INFO L125 PetriNetUnfolderBase]: For 2824/3212 co-relation queries the response was YES. [2024-11-22 21:53:02,211 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. [2024-11-22 21:53:02,229 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 94 selfloop transitions, 44 changer transitions 0/153 dead transitions. [2024-11-22 21:53:02,229 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 121 places, 153 transitions, 1181 flow [2024-11-22 21:53:02,230 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:53:02,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:53:02,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 471 transitions. [2024-11-22 21:53:02,232 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5292134831460674 [2024-11-22 21:53:02,232 INFO L175 Difference]: Start difference. First operand has 112 places, 110 transitions, 762 flow. Second operand 10 states and 471 transitions. [2024-11-22 21:53:02,232 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 121 places, 153 transitions, 1181 flow [2024-11-22 21:53:02,243 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 117 places, 153 transitions, 1153 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-11-22 21:53:02,247 INFO L231 Difference]: Finished difference. Result has 120 places, 112 transitions, 877 flow [2024-11-22 21:53:02,248 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} [2024-11-22 21:53:02,248 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 34 predicate places. [2024-11-22 21:53:02,248 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 112 transitions, 877 flow [2024-11-22 21:53:02,249 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) [2024-11-22 21:53:02,249 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:02,249 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] [2024-11-22 21:53:02,255 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-22 21:53:02,450 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 [2024-11-22 21:53:02,450 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:53:02,450 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:02,450 INFO L85 PathProgramCache]: Analyzing trace with hash -415937407, now seen corresponding path program 1 times [2024-11-22 21:53:02,450 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:02,450 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136334028] [2024-11-22 21:53:02,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:02,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:02,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:02,817 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:53:02,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:02,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136334028] [2024-11-22 21:53:02,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136334028] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:02,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1335520890] [2024-11-22 21:53:02,818 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:02,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:02,818 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:02,820 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) [2024-11-22 21:53:02,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 21:53:02,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:02,931 INFO L255 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-22 21:53:02,933 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:02,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-22 21:53:03,049 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-22 21:53:03,049 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 [2024-11-22 21:53:03,410 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:53:03,411 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:53:03,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1335520890] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:03,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:53:03,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [8, 8] total 22 [2024-11-22 21:53:03,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649567861] [2024-11-22 21:53:03,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:03,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 21:53:03,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:03,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 21:53:03,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=432, Unknown=0, NotChecked=0, Total=506 [2024-11-22 21:53:03,908 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-22 21:53:03,909 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) [2024-11-22 21:53:03,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:03,909 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-22 21:53:03,909 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:04,830 INFO L124 PetriNetUnfolderBase]: 4310/6517 cut-off events. [2024-11-22 21:53:04,830 INFO L125 PetriNetUnfolderBase]: For 2250/2542 co-relation queries the response was YES. [2024-11-22 21:53:04,848 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. [2024-11-22 21:53:04,869 INFO L140 encePairwiseOnDemand]: 75/89 looper letters, 106 selfloop transitions, 36 changer transitions 0/155 dead transitions. [2024-11-22 21:53:04,869 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 129 places, 155 transitions, 1304 flow [2024-11-22 21:53:04,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-22 21:53:04,870 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-22 21:53:04,871 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 481 transitions. [2024-11-22 21:53:04,871 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.491317671092952 [2024-11-22 21:53:04,871 INFO L175 Difference]: Start difference. First operand has 120 places, 112 transitions, 877 flow. Second operand 11 states and 481 transitions. [2024-11-22 21:53:04,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 129 places, 155 transitions, 1304 flow [2024-11-22 21:53:04,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 155 transitions, 1253 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-11-22 21:53:04,888 INFO L231 Difference]: Finished difference. Result has 127 places, 115 transitions, 948 flow [2024-11-22 21:53:04,888 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} [2024-11-22 21:53:04,889 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 41 predicate places. [2024-11-22 21:53:04,889 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 115 transitions, 948 flow [2024-11-22 21:53:04,889 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) [2024-11-22 21:53:04,889 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:04,890 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] [2024-11-22 21:53:04,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-22 21:53:05,093 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 [2024-11-22 21:53:05,094 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:53:05,094 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:05,094 INFO L85 PathProgramCache]: Analyzing trace with hash -489415020, now seen corresponding path program 2 times [2024-11-22 21:53:05,094 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:05,094 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858582752] [2024-11-22 21:53:05,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:05,095 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:05,115 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:05,115 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:05,402 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-22 21:53:05,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:05,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858582752] [2024-11-22 21:53:05,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858582752] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:05,403 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:05,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 21:53:05,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638777637] [2024-11-22 21:53:05,404 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:05,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-22 21:53:05,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:05,405 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-22 21:53:05,405 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-11-22 21:53:05,657 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 30 out of 89 [2024-11-22 21:53:05,657 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) [2024-11-22 21:53:05,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:05,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 30 of 89 [2024-11-22 21:53:05,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:06,831 INFO L124 PetriNetUnfolderBase]: 7523/10794 cut-off events. [2024-11-22 21:53:06,831 INFO L125 PetriNetUnfolderBase]: For 8750/9234 co-relation queries the response was YES. [2024-11-22 21:53:06,863 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. [2024-11-22 21:53:06,907 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 137 selfloop transitions, 21 changer transitions 0/171 dead transitions. [2024-11-22 21:53:06,907 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 171 transitions, 1508 flow [2024-11-22 21:53:06,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:53:06,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:53:06,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 331 transitions. [2024-11-22 21:53:06,909 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4648876404494382 [2024-11-22 21:53:06,909 INFO L175 Difference]: Start difference. First operand has 127 places, 115 transitions, 948 flow. Second operand 8 states and 331 transitions. [2024-11-22 21:53:06,909 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 171 transitions, 1508 flow [2024-11-22 21:53:06,927 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 171 transitions, 1496 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:53:06,930 INFO L231 Difference]: Finished difference. Result has 134 places, 118 transitions, 1003 flow [2024-11-22 21:53:06,930 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} [2024-11-22 21:53:06,930 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 48 predicate places. [2024-11-22 21:53:06,931 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 118 transitions, 1003 flow [2024-11-22 21:53:06,931 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) [2024-11-22 21:53:06,931 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:06,931 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] [2024-11-22 21:53:06,931 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-22 21:53:06,932 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:53:06,932 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:06,932 INFO L85 PathProgramCache]: Analyzing trace with hash -489415018, now seen corresponding path program 1 times [2024-11-22 21:53:06,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:06,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [70159247] [2024-11-22 21:53:06,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:06,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:06,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:07,204 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:53:07,205 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:07,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [70159247] [2024-11-22 21:53:07,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [70159247] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:07,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [442594674] [2024-11-22 21:53:07,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:07,205 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:07,205 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:07,206 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) [2024-11-22 21:53:07,207 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 21:53:07,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:07,307 INFO L255 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-22 21:53:07,309 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:07,414 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:53:07,414 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:07,495 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 [2024-11-22 21:53:07,536 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:53:07,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [442594674] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:07,536 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:07,536 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2024-11-22 21:53:07,537 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114441748] [2024-11-22 21:53:07,537 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:07,537 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:53:07,537 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:07,538 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:53:07,538 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:53:07,938 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-22 21:53:07,939 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) [2024-11-22 21:53:07,939 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:07,939 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-22 21:53:07,939 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:08,984 INFO L124 PetriNetUnfolderBase]: 5206/8069 cut-off events. [2024-11-22 21:53:08,984 INFO L125 PetriNetUnfolderBase]: For 8853/9800 co-relation queries the response was YES. [2024-11-22 21:53:09,011 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. [2024-11-22 21:53:09,045 INFO L140 encePairwiseOnDemand]: 77/89 looper letters, 123 selfloop transitions, 33 changer transitions 0/173 dead transitions. [2024-11-22 21:53:09,046 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 173 transitions, 1511 flow [2024-11-22 21:53:09,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:53:09,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:53:09,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 415 transitions. [2024-11-22 21:53:09,047 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5828651685393258 [2024-11-22 21:53:09,047 INFO L175 Difference]: Start difference. First operand has 134 places, 118 transitions, 1003 flow. Second operand 8 states and 415 transitions. [2024-11-22 21:53:09,047 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 173 transitions, 1511 flow [2024-11-22 21:53:09,066 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 173 transitions, 1470 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-22 21:53:09,068 INFO L231 Difference]: Finished difference. Result has 138 places, 119 transitions, 1048 flow [2024-11-22 21:53:09,068 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} [2024-11-22 21:53:09,068 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 52 predicate places. [2024-11-22 21:53:09,068 INFO L471 AbstractCegarLoop]: Abstraction has has 138 places, 119 transitions, 1048 flow [2024-11-22 21:53:09,069 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) [2024-11-22 21:53:09,069 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:09,069 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] [2024-11-22 21:53:09,075 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-22 21:53:09,269 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 [2024-11-22 21:53:09,269 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:53:09,270 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:09,270 INFO L85 PathProgramCache]: Analyzing trace with hash -489415022, now seen corresponding path program 1 times [2024-11-22 21:53:09,270 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:09,270 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905582402] [2024-11-22 21:53:09,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:09,270 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:09,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:09,728 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:53:09,728 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:09,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905582402] [2024-11-22 21:53:09,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905582402] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:09,728 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779687908] [2024-11-22 21:53:09,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:09,729 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:09,729 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:09,731 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) [2024-11-22 21:53:09,733 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 21:53:09,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:09,843 INFO L255 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 44 conjuncts are in the unsatisfiable core [2024-11-22 21:53:09,851 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:09,859 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:53:09,864 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-22 21:53:09,933 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-22 21:53:09,934 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 [2024-11-22 21:53:09,951 INFO L349 Elim1Store]: treesize reduction 17, result has 22.7 percent of original size [2024-11-22 21:53:09,951 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 [2024-11-22 21:53:10,134 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:53:10,135 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-22 21:53:10,137 INFO L349 Elim1Store]: treesize reduction 7, result has 12.5 percent of original size [2024-11-22 21:53:10,138 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 [2024-11-22 21:53:10,151 INFO L349 Elim1Store]: treesize reduction 16, result has 36.0 percent of original size [2024-11-22 21:53:10,151 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 [2024-11-22 21:53:10,358 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:53:10,358 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:10,656 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:53:10,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779687908] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:10,657 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:53:10,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 8] total 22 [2024-11-22 21:53:10,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320980186] [2024-11-22 21:53:10,657 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:10,657 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-22 21:53:10,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:10,657 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-22 21:53:10,658 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2024-11-22 21:53:10,998 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 89 [2024-11-22 21:53:10,999 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) [2024-11-22 21:53:10,999 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:10,999 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 89 [2024-11-22 21:53:10,999 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:11,954 INFO L124 PetriNetUnfolderBase]: 5341/8065 cut-off events. [2024-11-22 21:53:11,954 INFO L125 PetriNetUnfolderBase]: For 11196/11885 co-relation queries the response was YES. [2024-11-22 21:53:11,975 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. [2024-11-22 21:53:11,998 INFO L140 encePairwiseOnDemand]: 76/89 looper letters, 115 selfloop transitions, 31 changer transitions 0/161 dead transitions. [2024-11-22 21:53:11,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 147 places, 161 transitions, 1511 flow [2024-11-22 21:53:11,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-22 21:53:11,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-22 21:53:11,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 426 transitions. [2024-11-22 21:53:11,999 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4786516853932584 [2024-11-22 21:53:11,999 INFO L175 Difference]: Start difference. First operand has 138 places, 119 transitions, 1048 flow. Second operand 10 states and 426 transitions. [2024-11-22 21:53:11,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 147 places, 161 transitions, 1511 flow [2024-11-22 21:53:12,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 142 places, 161 transitions, 1448 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-22 21:53:12,017 INFO L231 Difference]: Finished difference. Result has 145 places, 122 transitions, 1099 flow [2024-11-22 21:53:12,017 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} [2024-11-22 21:53:12,017 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 59 predicate places. [2024-11-22 21:53:12,017 INFO L471 AbstractCegarLoop]: Abstraction has has 145 places, 122 transitions, 1099 flow [2024-11-22 21:53:12,017 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) [2024-11-22 21:53:12,018 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:12,018 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] [2024-11-22 21:53:12,024 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-22 21:53:12,218 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 [2024-11-22 21:53:12,219 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:53:12,219 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:12,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1252155440, now seen corresponding path program 1 times [2024-11-22 21:53:12,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:12,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521040532] [2024-11-22 21:53:12,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:12,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:12,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:12,344 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:53:12,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:12,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521040532] [2024-11-22 21:53:12,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [521040532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:12,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1156807961] [2024-11-22 21:53:12,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:12,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:12,345 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:12,347 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) [2024-11-22 21:53:12,348 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 21:53:12,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:12,438 INFO L255 TraceCheckSpWp]: Trace formula consists of 295 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 21:53:12,440 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:12,509 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:53:12,509 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:53:12,579 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1156807961] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:12,579 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:12,579 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-22 21:53:12,579 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521821155] [2024-11-22 21:53:12,579 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:12,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:53:12,580 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:12,580 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:53:12,580 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:53:12,657 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-22 21:53:12,658 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) [2024-11-22 21:53:12,658 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:12,658 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-22 21:53:12,658 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:13,878 INFO L124 PetriNetUnfolderBase]: 8623/12831 cut-off events. [2024-11-22 21:53:13,878 INFO L125 PetriNetUnfolderBase]: For 25495/26065 co-relation queries the response was YES. [2024-11-22 21:53:13,912 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. [2024-11-22 21:53:13,947 INFO L140 encePairwiseOnDemand]: 75/89 looper letters, 142 selfloop transitions, 61 changer transitions 0/218 dead transitions. [2024-11-22 21:53:13,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 218 transitions, 2069 flow [2024-11-22 21:53:13,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-22 21:53:13,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-22 21:53:13,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 700 transitions. [2024-11-22 21:53:13,949 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5243445692883895 [2024-11-22 21:53:13,949 INFO L175 Difference]: Start difference. First operand has 145 places, 122 transitions, 1099 flow. Second operand 15 states and 700 transitions. [2024-11-22 21:53:13,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 218 transitions, 2069 flow [2024-11-22 21:53:13,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 218 transitions, 2022 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-11-22 21:53:13,986 INFO L231 Difference]: Finished difference. Result has 158 places, 137 transitions, 1449 flow [2024-11-22 21:53:13,986 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} [2024-11-22 21:53:13,987 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 72 predicate places. [2024-11-22 21:53:13,987 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 137 transitions, 1449 flow [2024-11-22 21:53:13,987 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) [2024-11-22 21:53:13,987 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:13,987 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] [2024-11-22 21:53:13,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-22 21:53:14,188 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 [2024-11-22 21:53:14,188 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:53:14,188 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:14,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1607383876, now seen corresponding path program 2 times [2024-11-22 21:53:14,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:14,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1503024783] [2024-11-22 21:53:14,189 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:14,189 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:14,202 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:14,202 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:14,285 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-22 21:53:14,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:14,286 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1503024783] [2024-11-22 21:53:14,286 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1503024783] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:14,286 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:14,286 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:53:14,286 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667400986] [2024-11-22 21:53:14,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:14,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:53:14,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:14,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:53:14,288 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:53:14,303 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 89 [2024-11-22 21:53:14,304 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) [2024-11-22 21:53:14,304 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:14,304 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 89 [2024-11-22 21:53:14,304 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:15,480 INFO L124 PetriNetUnfolderBase]: 9232/13574 cut-off events. [2024-11-22 21:53:15,480 INFO L125 PetriNetUnfolderBase]: For 38017/39073 co-relation queries the response was YES. [2024-11-22 21:53:15,528 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. [2024-11-22 21:53:15,574 INFO L140 encePairwiseOnDemand]: 83/89 looper letters, 197 selfloop transitions, 18 changer transitions 0/229 dead transitions. [2024-11-22 21:53:15,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 163 places, 229 transitions, 2446 flow [2024-11-22 21:53:15,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:53:15,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:53:15,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 324 transitions. [2024-11-22 21:53:15,575 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6067415730337079 [2024-11-22 21:53:15,575 INFO L175 Difference]: Start difference. First operand has 158 places, 137 transitions, 1449 flow. Second operand 6 states and 324 transitions. [2024-11-22 21:53:15,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 163 places, 229 transitions, 2446 flow [2024-11-22 21:53:15,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 229 transitions, 2414 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-22 21:53:15,612 INFO L231 Difference]: Finished difference. Result has 166 places, 143 transitions, 1506 flow [2024-11-22 21:53:15,612 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} [2024-11-22 21:53:15,612 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 80 predicate places. [2024-11-22 21:53:15,612 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 143 transitions, 1506 flow [2024-11-22 21:53:15,612 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) [2024-11-22 21:53:15,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:15,613 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] [2024-11-22 21:53:15,613 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-22 21:53:15,613 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:53:15,613 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:15,613 INFO L85 PathProgramCache]: Analyzing trace with hash 2087372679, now seen corresponding path program 1 times [2024-11-22 21:53:15,613 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:15,613 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986818015] [2024-11-22 21:53:15,613 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:15,613 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:15,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:15,732 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:53:15,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:15,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986818015] [2024-11-22 21:53:15,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986818015] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:15,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868607746] [2024-11-22 21:53:15,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:15,732 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:15,733 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:15,735 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) [2024-11-22 21:53:15,737 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 21:53:15,842 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:15,844 INFO L255 TraceCheckSpWp]: Trace formula consists of 269 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-22 21:53:15,845 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:15,919 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:53:15,919 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:15,995 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-22 21:53:15,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [868607746] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:15,995 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:15,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2024-11-22 21:53:15,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191737522] [2024-11-22 21:53:15,995 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:15,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:53:15,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:15,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:53:15,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:53:16,162 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-22 21:53:16,163 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) [2024-11-22 21:53:16,163 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:16,163 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-22 21:53:16,163 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:17,253 INFO L124 PetriNetUnfolderBase]: 6687/10895 cut-off events. [2024-11-22 21:53:17,253 INFO L125 PetriNetUnfolderBase]: For 35674/36443 co-relation queries the response was YES. [2024-11-22 21:53:17,297 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. [2024-11-22 21:53:17,334 INFO L140 encePairwiseOnDemand]: 75/89 looper letters, 143 selfloop transitions, 61 changer transitions 0/222 dead transitions. [2024-11-22 21:53:17,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 222 transitions, 2373 flow [2024-11-22 21:53:17,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-22 21:53:17,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-22 21:53:17,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 692 transitions. [2024-11-22 21:53:17,336 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5183520599250936 [2024-11-22 21:53:17,336 INFO L175 Difference]: Start difference. First operand has 166 places, 143 transitions, 1506 flow. Second operand 15 states and 692 transitions. [2024-11-22 21:53:17,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 222 transitions, 2373 flow [2024-11-22 21:53:17,377 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 180 places, 222 transitions, 2365 flow, removed 4 selfloop flow, removed 0 redundant places. [2024-11-22 21:53:17,380 INFO L231 Difference]: Finished difference. Result has 183 places, 147 transitions, 1693 flow [2024-11-22 21:53:17,380 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} [2024-11-22 21:53:17,380 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 97 predicate places. [2024-11-22 21:53:17,380 INFO L471 AbstractCegarLoop]: Abstraction has has 183 places, 147 transitions, 1693 flow [2024-11-22 21:53:17,381 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) [2024-11-22 21:53:17,381 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:17,381 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:17,387 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2024-11-22 21:53:17,581 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 [2024-11-22 21:53:17,581 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:53:17,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:17,582 INFO L85 PathProgramCache]: Analyzing trace with hash 37308115, now seen corresponding path program 1 times [2024-11-22 21:53:17,582 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:17,582 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1370593497] [2024-11-22 21:53:17,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:17,582 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:17,684 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-22 21:53:17,685 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:17,685 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1370593497] [2024-11-22 21:53:17,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1370593497] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:17,685 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:17,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 21:53:17,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [262608760] [2024-11-22 21:53:17,685 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:17,686 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:53:17,686 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:17,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:53:17,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:53:17,778 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 89 [2024-11-22 21:53:17,779 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) [2024-11-22 21:53:17,779 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:17,779 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 89 [2024-11-22 21:53:17,779 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:19,562 INFO L124 PetriNetUnfolderBase]: 10673/16948 cut-off events. [2024-11-22 21:53:19,562 INFO L125 PetriNetUnfolderBase]: For 59436/61031 co-relation queries the response was YES. [2024-11-22 21:53:19,615 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. [2024-11-22 21:53:19,666 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 182 selfloop transitions, 17 changer transitions 24/242 dead transitions. [2024-11-22 21:53:19,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 242 transitions, 2746 flow [2024-11-22 21:53:19,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:53:19,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:53:19,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 368 transitions. [2024-11-22 21:53:19,667 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5906902086677368 [2024-11-22 21:53:19,668 INFO L175 Difference]: Start difference. First operand has 183 places, 147 transitions, 1693 flow. Second operand 7 states and 368 transitions. [2024-11-22 21:53:19,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 242 transitions, 2746 flow [2024-11-22 21:53:19,719 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 179 places, 242 transitions, 2647 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-11-22 21:53:19,721 INFO L231 Difference]: Finished difference. Result has 181 places, 137 transitions, 1387 flow [2024-11-22 21:53:19,721 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} [2024-11-22 21:53:19,721 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 95 predicate places. [2024-11-22 21:53:19,721 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 137 transitions, 1387 flow [2024-11-22 21:53:19,722 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) [2024-11-22 21:53:19,722 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:19,722 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] [2024-11-22 21:53:19,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-11-22 21:53:19,722 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:53:19,722 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:19,722 INFO L85 PathProgramCache]: Analyzing trace with hash 2023337642, now seen corresponding path program 1 times [2024-11-22 21:53:19,722 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:19,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952121770] [2024-11-22 21:53:19,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:19,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:19,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:19,856 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-22 21:53:19,857 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:19,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952121770] [2024-11-22 21:53:19,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952121770] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:19,857 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:19,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 21:53:19,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532190143] [2024-11-22 21:53:19,857 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:19,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:53:19,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:19,858 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:53:19,858 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-22 21:53:19,918 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-22 21:53:19,919 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) [2024-11-22 21:53:19,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:19,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-22 21:53:19,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:22,756 INFO L124 PetriNetUnfolderBase]: 15637/24840 cut-off events. [2024-11-22 21:53:22,756 INFO L125 PetriNetUnfolderBase]: For 75831/77816 co-relation queries the response was YES. [2024-11-22 21:53:23,108 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. [2024-11-22 21:53:23,193 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 211 selfloop transitions, 31 changer transitions 0/262 dead transitions. [2024-11-22 21:53:23,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 178 places, 262 transitions, 2685 flow [2024-11-22 21:53:23,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:53:23,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:53:23,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 418 transitions. [2024-11-22 21:53:23,194 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5870786516853933 [2024-11-22 21:53:23,195 INFO L175 Difference]: Start difference. First operand has 181 places, 137 transitions, 1387 flow. Second operand 8 states and 418 transitions. [2024-11-22 21:53:23,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 178 places, 262 transitions, 2685 flow [2024-11-22 21:53:23,378 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 154 places, 262 transitions, 2417 flow, removed 28 selfloop flow, removed 24 redundant places. [2024-11-22 21:53:23,381 INFO L231 Difference]: Finished difference. Result has 158 places, 155 transitions, 1482 flow [2024-11-22 21:53:23,381 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} [2024-11-22 21:53:23,381 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 72 predicate places. [2024-11-22 21:53:23,381 INFO L471 AbstractCegarLoop]: Abstraction has has 158 places, 155 transitions, 1482 flow [2024-11-22 21:53:23,382 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) [2024-11-22 21:53:23,382 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:23,382 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] [2024-11-22 21:53:23,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-11-22 21:53:23,382 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:53:23,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:23,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1454380344, now seen corresponding path program 2 times [2024-11-22 21:53:23,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:23,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820090180] [2024-11-22 21:53:23,383 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:23,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:23,394 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:23,395 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:23,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-22 21:53:23,495 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:23,495 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820090180] [2024-11-22 21:53:23,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820090180] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:23,495 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:23,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 21:53:23,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576947443] [2024-11-22 21:53:23,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:23,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:53:23,496 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:23,496 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:53:23,496 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-22 21:53:23,573 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-22 21:53:23,574 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) [2024-11-22 21:53:23,574 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:23,574 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-22 21:53:23,574 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:27,001 INFO L124 PetriNetUnfolderBase]: 18773/29647 cut-off events. [2024-11-22 21:53:27,001 INFO L125 PetriNetUnfolderBase]: For 68607/70694 co-relation queries the response was YES. [2024-11-22 21:53:27,162 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. [2024-11-22 21:53:27,269 INFO L140 encePairwiseOnDemand]: 79/89 looper letters, 224 selfloop transitions, 31 changer transitions 0/275 dead transitions. [2024-11-22 21:53:27,269 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 165 places, 275 transitions, 2722 flow [2024-11-22 21:53:27,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:53:27,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:53:27,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 418 transitions. [2024-11-22 21:53:27,270 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5870786516853933 [2024-11-22 21:53:27,270 INFO L175 Difference]: Start difference. First operand has 158 places, 155 transitions, 1482 flow. Second operand 8 states and 418 transitions. [2024-11-22 21:53:27,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 165 places, 275 transitions, 2722 flow [2024-11-22 21:53:27,826 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 162 places, 275 transitions, 2679 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-11-22 21:53:27,829 INFO L231 Difference]: Finished difference. Result has 166 places, 165 transitions, 1664 flow [2024-11-22 21:53:27,829 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} [2024-11-22 21:53:27,830 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 80 predicate places. [2024-11-22 21:53:27,830 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 165 transitions, 1664 flow [2024-11-22 21:53:27,830 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) [2024-11-22 21:53:27,830 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:27,830 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] [2024-11-22 21:53:27,830 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-11-22 21:53:27,830 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:53:27,831 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:27,831 INFO L85 PathProgramCache]: Analyzing trace with hash -1136087720, now seen corresponding path program 3 times [2024-11-22 21:53:27,831 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:27,831 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592415542] [2024-11-22 21:53:27,831 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:53:27,831 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:27,847 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2024-11-22 21:53:27,849 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:27,953 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2024-11-22 21:53:27,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:27,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592415542] [2024-11-22 21:53:27,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592415542] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:27,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:27,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 21:53:27,953 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1188466646] [2024-11-22 21:53:27,953 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:27,953 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-22 21:53:27,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:27,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-22 21:53:27,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-22 21:53:28,013 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 89 [2024-11-22 21:53:28,014 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) [2024-11-22 21:53:28,014 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:28,014 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 89 [2024-11-22 21:53:28,014 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:31,395 INFO L124 PetriNetUnfolderBase]: 18771/29041 cut-off events. [2024-11-22 21:53:31,395 INFO L125 PetriNetUnfolderBase]: For 93158/95637 co-relation queries the response was YES. [2024-11-22 21:53:31,539 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. [2024-11-22 21:53:31,839 INFO L140 encePairwiseOnDemand]: 80/89 looper letters, 229 selfloop transitions, 47 changer transitions 0/296 dead transitions. [2024-11-22 21:53:31,840 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 296 transitions, 2993 flow [2024-11-22 21:53:31,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:53:31,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:53:31,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 471 transitions. [2024-11-22 21:53:31,841 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5880149812734082 [2024-11-22 21:53:31,841 INFO L175 Difference]: Start difference. First operand has 166 places, 165 transitions, 1664 flow. Second operand 9 states and 471 transitions. [2024-11-22 21:53:31,841 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 296 transitions, 2993 flow [2024-11-22 21:53:32,566 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 172 places, 296 transitions, 2957 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-11-22 21:53:32,569 INFO L231 Difference]: Finished difference. Result has 174 places, 170 transitions, 1796 flow [2024-11-22 21:53:32,569 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} [2024-11-22 21:53:32,570 INFO L277 CegarLoopForPetriNet]: 86 programPoint places, 88 predicate places. [2024-11-22 21:53:32,570 INFO L471 AbstractCegarLoop]: Abstraction has has 174 places, 170 transitions, 1796 flow [2024-11-22 21:53:32,570 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) [2024-11-22 21:53:32,570 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:32,570 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] [2024-11-22 21:53:32,571 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-11-22 21:53:32,571 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 52 more)] === [2024-11-22 21:53:32,571 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:32,571 INFO L85 PathProgramCache]: Analyzing trace with hash 1033410799, now seen corresponding path program 1 times [2024-11-22 21:53:32,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:32,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213153940] [2024-11-22 21:53:32,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:32,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:32,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:33,031 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 2 proven. 9 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 21:53:33,031 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:33,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213153940] [2024-11-22 21:53:33,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [213153940] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:33,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126350567] [2024-11-22 21:53:33,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:33,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:33,032 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:33,033 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) [2024-11-22 21:53:33,034 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-22 21:53:33,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:33,146 INFO L255 TraceCheckSpWp]: Trace formula consists of 340 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-22 21:53:33,148 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:33,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:53:33,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-22 21:53:33,260 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-22 21:53:33,261 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 [2024-11-22 21:53:33,280 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-22 21:53:33,280 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-22 21:53:33,740 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 6 proven. 13 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-22 21:53:33,740 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:34,270 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-22 21:53:34,276 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 9 proven. 2 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2024-11-22 21:53:34,276 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [126350567] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:34,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:34,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 11, 9] total 27 [2024-11-22 21:53:34,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [348031015] [2024-11-22 21:53:34,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:34,277 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2024-11-22 21:53:34,277 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:34,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2024-11-22 21:53:34,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=635, Unknown=0, NotChecked=0, Total=756 [2024-11-22 21:53:35,677 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 89 [2024-11-22 21:53:35,677 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) [2024-11-22 21:53:35,678 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:35,678 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 89 [2024-11-22 21:53:35,678 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand