./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version fca748b1 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 /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-mts.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 cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e --- Real Ultimate output --- This is Ultimate 0.2.5-wip.dd.update-z3-fca748b-m [2024-11-20 17:47:08,126 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-20 17:47:08,206 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-20 17:47:08,211 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-20 17:47:08,211 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-20 17:47:08,248 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-20 17:47:08,250 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-20 17:47:08,251 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-20 17:47:08,252 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-20 17:47:08,253 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-20 17:47:08,254 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-20 17:47:08,254 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-20 17:47:08,255 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-20 17:47:08,257 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-20 17:47:08,257 INFO L153 SettingsManager]: * Use SBE=true [2024-11-20 17:47:08,258 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-20 17:47:08,258 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-20 17:47:08,258 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-20 17:47:08,258 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-20 17:47:08,259 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-20 17:47:08,259 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-20 17:47:08,260 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-20 17:47:08,260 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-20 17:47:08,260 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-20 17:47:08,261 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-20 17:47:08,261 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-20 17:47:08,261 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-20 17:47:08,262 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-20 17:47:08,262 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-20 17:47:08,262 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-20 17:47:08,263 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-20 17:47:08,263 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-20 17:47:08,263 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-20 17:47:08,263 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:47:08,264 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-20 17:47:08,264 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-20 17:47:08,264 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-20 17:47:08,264 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-20 17:47:08,264 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-20 17:47:08,264 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-20 17:47:08,265 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-20 17:47:08,265 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-20 17:47:08,265 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cc67bee348fb2ffff05c0616660a93fb872177c05d08813d910a29641aea282e [2024-11-20 17:47:08,512 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-20 17:47:08,534 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-20 17:47:08,538 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-20 17:47:08,539 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-20 17:47:08,539 INFO L274 PluginConnector]: CDTParser initialized [2024-11-20 17:47:08,540 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2024-11-20 17:47:10,050 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-20 17:47:10,260 INFO L384 CDTParser]: Found 1 translation units. [2024-11-20 17:47:10,260 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-mts.wvr.c [2024-11-20 17:47:10,269 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bcb1a9f7/ba7957f345534a598a879cbee44dc222/FLAG106b40e58 [2024-11-20 17:47:10,281 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/6bcb1a9f7/ba7957f345534a598a879cbee44dc222 [2024-11-20 17:47:10,284 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-20 17:47:10,285 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-20 17:47:10,286 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-20 17:47:10,286 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-20 17:47:10,292 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-20 17:47:10,292 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:47:10" (1/1) ... [2024-11-20 17:47:10,293 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@556acf17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:10, skipping insertion in model container [2024-11-20 17:47:10,294 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 20.11 05:47:10" (1/1) ... [2024-11-20 17:47:10,338 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-20 17:47:10,592 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-20 17:47:10,600 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:47:10,610 INFO L200 MainTranslator]: Completed pre-run [2024-11-20 17:47:10,647 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-20 17:47:10,669 INFO L204 MainTranslator]: Completed translation [2024-11-20 17:47:10,670 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:10 WrapperNode [2024-11-20 17:47:10,670 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-20 17:47:10,671 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-20 17:47:10,672 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-20 17:47:10,672 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-20 17:47:10,680 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:10" (1/1) ... [2024-11-20 17:47:10,689 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:10" (1/1) ... [2024-11-20 17:47:10,726 INFO L138 Inliner]: procedures = 24, calls = 32, calls flagged for inlining = 14, calls inlined = 20, statements flattened = 218 [2024-11-20 17:47:10,729 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-20 17:47:10,730 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-20 17:47:10,730 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-20 17:47:10,730 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-20 17:47:10,741 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:10" (1/1) ... [2024-11-20 17:47:10,742 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:10" (1/1) ... [2024-11-20 17:47:10,749 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:10" (1/1) ... [2024-11-20 17:47:10,782 INFO L175 MemorySlicer]: Split 10 memory accesses to 2 slices as follows [2, 8]. 80 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-20 17:47:10,783 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:10" (1/1) ... [2024-11-20 17:47:10,783 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:10" (1/1) ... [2024-11-20 17:47:10,797 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:10" (1/1) ... [2024-11-20 17:47:10,801 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:10" (1/1) ... [2024-11-20 17:47:10,807 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:10" (1/1) ... [2024-11-20 17:47:10,812 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:10" (1/1) ... [2024-11-20 17:47:10,815 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-20 17:47:10,818 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-20 17:47:10,819 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-20 17:47:10,819 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-20 17:47:10,820 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:10" (1/1) ... [2024-11-20 17:47:10,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-20 17:47:10,837 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:10,857 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) [2024-11-20 17:47:10,861 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 [2024-11-20 17:47:10,911 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-20 17:47:10,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-20 17:47:10,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-20 17:47:10,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-20 17:47:10,912 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-20 17:47:10,912 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-20 17:47:10,913 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-20 17:47:10,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-20 17:47:10,913 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-20 17:47:10,914 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-20 17:47:10,915 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-20 17:47:10,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-20 17:47:10,915 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-20 17:47:10,915 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-20 17:47:10,915 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-20 17:47:10,915 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-20 17:47:10,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-20 17:47:10,916 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-20 17:47:10,917 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-20 17:47:11,050 INFO L238 CfgBuilder]: Building ICFG [2024-11-20 17:47:11,053 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-20 17:47:11,525 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-20 17:47:11,525 INFO L287 CfgBuilder]: Performing block encoding [2024-11-20 17:47:11,945 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-20 17:47:11,946 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-20 17:47:11,946 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:47:11 BoogieIcfgContainer [2024-11-20 17:47:11,947 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-20 17:47:11,949 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-20 17:47:11,950 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-20 17:47:11,954 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-20 17:47:11,954 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 20.11 05:47:10" (1/3) ... [2024-11-20 17:47:11,955 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed373eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:47:11, skipping insertion in model container [2024-11-20 17:47:11,956 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 20.11 05:47:10" (2/3) ... [2024-11-20 17:47:11,956 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ed373eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 20.11 05:47:11, skipping insertion in model container [2024-11-20 17:47:11,957 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 20.11 05:47:11" (3/3) ... [2024-11-20 17:47:11,958 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-more-mts.wvr.c [2024-11-20 17:47:11,978 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-20 17:47:11,979 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 18 error locations. [2024-11-20 17:47:11,979 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-20 17:47:12,061 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-20 17:47:12,100 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 62 places, 58 transitions, 137 flow [2024-11-20 17:47:12,142 INFO L124 PetriNetUnfolderBase]: 6/55 cut-off events. [2024-11-20 17:47:12,142 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-20 17:47:12,150 INFO L83 FinitePrefix]: Finished finitePrefix Result has 68 conditions, 55 events. 6/55 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 144 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 44. Up to 2 conditions per place. [2024-11-20 17:47:12,151 INFO L82 GeneralOperation]: Start removeDead. Operand has 62 places, 58 transitions, 137 flow [2024-11-20 17:47:12,154 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 58 places, 54 transitions, 126 flow [2024-11-20 17:47:12,167 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-20 17:47:12,173 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;@1cd800e0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-20 17:47:12,174 INFO L334 AbstractCegarLoop]: Starting to check reachability of 35 error locations. [2024-11-20 17:47:12,177 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-20 17:47:12,177 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-20 17:47:12,177 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-20 17:47:12,178 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:12,178 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:47:12,179 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:47:12,185 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:12,185 INFO L85 PathProgramCache]: Analyzing trace with hash 725632, now seen corresponding path program 1 times [2024-11-20 17:47:12,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:12,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [634074800] [2024-11-20 17:47:12,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:12,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:12,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:12,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:12,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:12,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [634074800] [2024-11-20 17:47:12,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [634074800] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:12,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:12,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-20 17:47:12,436 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604628104] [2024-11-20 17:47:12,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:12,445 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:47:12,450 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:12,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:47:12,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:47:12,531 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-20 17:47:12,533 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 126 flow. Second operand has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2024-11-20 17:47:12,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:12,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-20 17:47:12,539 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:12,916 INFO L124 PetriNetUnfolderBase]: 1076/1573 cut-off events. [2024-11-20 17:47:12,917 INFO L125 PetriNetUnfolderBase]: For 112/112 co-relation queries the response was YES. [2024-11-20 17:47:12,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3154 conditions, 1573 events. 1076/1573 cut-off events. For 112/112 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6768 event pairs, 723 based on Foata normal form. 1/1429 useless extension candidates. Maximal degree in co-relation 2878. Up to 1475 conditions per place. [2024-11-20 17:47:12,935 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 30 selfloop transitions, 2 changer transitions 0/47 dead transitions. [2024-11-20 17:47:12,936 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 176 flow [2024-11-20 17:47:12,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:47:12,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:47:12,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2024-11-20 17:47:12,949 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5459770114942529 [2024-11-20 17:47:12,951 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 126 flow. Second operand 3 states and 95 transitions. [2024-11-20 17:47:12,952 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 176 flow [2024-11-20 17:47:12,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 47 transitions, 164 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-20 17:47:12,961 INFO L231 Difference]: Finished difference. Result has 47 places, 47 transitions, 104 flow [2024-11-20 17:47:12,964 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=47, PETRI_TRANSITIONS=47} [2024-11-20 17:47:12,969 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -11 predicate places. [2024-11-20 17:47:12,970 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 47 transitions, 104 flow [2024-11-20 17:47:12,970 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.0) internal successors, (60), 3 states have internal predecessors, (60), 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) [2024-11-20 17:47:12,970 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:12,970 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-20 17:47:12,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-20 17:47:12,971 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:47:12,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:12,972 INFO L85 PathProgramCache]: Analyzing trace with hash 725633, now seen corresponding path program 1 times [2024-11-20 17:47:12,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:12,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605125138] [2024-11-20 17:47:12,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:12,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:13,019 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:13,283 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:13,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:13,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605125138] [2024-11-20 17:47:13,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605125138] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:13,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:13,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:47:13,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278983201] [2024-11-20 17:47:13,286 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:13,287 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:47:13,287 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:13,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:47:13,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:47:13,314 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-20 17:47:13,315 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 47 transitions, 104 flow. Second operand has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-11-20 17:47:13,315 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:13,315 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-20 17:47:13,316 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:13,619 INFO L124 PetriNetUnfolderBase]: 1077/1576 cut-off events. [2024-11-20 17:47:13,619 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-20 17:47:13,623 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3094 conditions, 1576 events. 1077/1576 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6764 event pairs, 723 based on Foata normal form. 0/1431 useless extension candidates. Maximal degree in co-relation 3072. Up to 1480 conditions per place. [2024-11-20 17:47:13,633 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 32 selfloop transitions, 4 changer transitions 0/50 dead transitions. [2024-11-20 17:47:13,634 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 50 transitions, 184 flow [2024-11-20 17:47:13,635 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:47:13,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:47:13,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 113 transitions. [2024-11-20 17:47:13,636 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4870689655172414 [2024-11-20 17:47:13,636 INFO L175 Difference]: Start difference. First operand has 47 places, 47 transitions, 104 flow. Second operand 4 states and 113 transitions. [2024-11-20 17:47:13,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 50 transitions, 184 flow [2024-11-20 17:47:13,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 50 transitions, 178 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:47:13,641 INFO L231 Difference]: Finished difference. Result has 50 places, 50 transitions, 127 flow [2024-11-20 17:47:13,642 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=127, PETRI_PLACES=50, PETRI_TRANSITIONS=50} [2024-11-20 17:47:13,643 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -8 predicate places. [2024-11-20 17:47:13,643 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 50 transitions, 127 flow [2024-11-20 17:47:13,644 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.75) internal successors, (79), 4 states have internal predecessors, (79), 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) [2024-11-20 17:47:13,644 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:13,645 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-20 17:47:13,645 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-20 17:47:13,646 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:47:13,646 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:13,647 INFO L85 PathProgramCache]: Analyzing trace with hash 697356455, now seen corresponding path program 1 times [2024-11-20 17:47:13,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:13,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [829986320] [2024-11-20 17:47:13,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:13,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:13,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:13,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:13,942 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:13,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [829986320] [2024-11-20 17:47:13,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [829986320] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:13,942 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588105179] [2024-11-20 17:47:13,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:13,944 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:13,944 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:13,947 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) [2024-11-20 17:47:13,949 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-20 17:47:14,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:14,025 INFO L255 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-20 17:47:14,030 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:14,117 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 [2024-11-20 17:47:14,319 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:14,320 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:14,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:14,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1588105179] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:14,420 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:14,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-20 17:47:14,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2123904651] [2024-11-20 17:47:14,421 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:14,421 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-20 17:47:14,421 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:14,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-20 17:47:14,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:47:14,531 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-20 17:47:14,532 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 50 transitions, 127 flow. Second operand has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 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) [2024-11-20 17:47:14,532 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:14,532 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-20 17:47:14,533 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:14,968 INFO L124 PetriNetUnfolderBase]: 1078/1578 cut-off events. [2024-11-20 17:47:14,968 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2024-11-20 17:47:14,971 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3110 conditions, 1578 events. 1078/1578 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 102. Compared 6767 event pairs, 723 based on Foata normal form. 0/1432 useless extension candidates. Maximal degree in co-relation 3079. Up to 1477 conditions per place. [2024-11-20 17:47:14,980 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 28 selfloop transitions, 10 changer transitions 0/52 dead transitions. [2024-11-20 17:47:14,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 52 transitions, 211 flow [2024-11-20 17:47:14,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:47:14,981 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:47:14,982 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 192 transitions. [2024-11-20 17:47:14,983 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-11-20 17:47:14,983 INFO L175 Difference]: Start difference. First operand has 50 places, 50 transitions, 127 flow. Second operand 8 states and 192 transitions. [2024-11-20 17:47:14,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 52 transitions, 211 flow [2024-11-20 17:47:14,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 52 transitions, 208 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-20 17:47:14,985 INFO L231 Difference]: Finished difference. Result has 55 places, 52 transitions, 152 flow [2024-11-20 17:47:14,985 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=49, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=42, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=152, PETRI_PLACES=55, PETRI_TRANSITIONS=52} [2024-11-20 17:47:14,986 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -3 predicate places. [2024-11-20 17:47:14,986 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 52 transitions, 152 flow [2024-11-20 17:47:14,986 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 20.363636363636363) internal successors, (224), 11 states have internal predecessors, (224), 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) [2024-11-20 17:47:14,986 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:14,987 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:47:14,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-20 17:47:15,190 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 [2024-11-20 17:47:15,191 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:47:15,192 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:15,192 INFO L85 PathProgramCache]: Analyzing trace with hash 146355160, now seen corresponding path program 1 times [2024-11-20 17:47:15,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:15,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780341633] [2024-11-20 17:47:15,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:15,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:15,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:15,258 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:15,258 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:15,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780341633] [2024-11-20 17:47:15,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780341633] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:15,259 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:15,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:47:15,259 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650172085] [2024-11-20 17:47:15,259 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:15,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:47:15,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:15,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:47:15,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:47:15,282 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 58 [2024-11-20 17:47:15,283 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 52 transitions, 152 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:15,283 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:15,283 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 58 [2024-11-20 17:47:15,283 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:15,449 INFO L124 PetriNetUnfolderBase]: 921/1347 cut-off events. [2024-11-20 17:47:15,449 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-20 17:47:15,451 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2674 conditions, 1347 events. 921/1347 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5498 event pairs, 608 based on Foata normal form. 0/1275 useless extension candidates. Maximal degree in co-relation 2636. Up to 1263 conditions per place. [2024-11-20 17:47:15,458 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 33 selfloop transitions, 4 changer transitions 0/47 dead transitions. [2024-11-20 17:47:15,458 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 216 flow [2024-11-20 17:47:15,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:47:15,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:47:15,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-20 17:47:15,460 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41379310344827586 [2024-11-20 17:47:15,460 INFO L175 Difference]: Start difference. First operand has 55 places, 52 transitions, 152 flow. Second operand 4 states and 96 transitions. [2024-11-20 17:47:15,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 216 flow [2024-11-20 17:47:15,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 47 transitions, 174 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-20 17:47:15,461 INFO L231 Difference]: Finished difference. Result has 46 places, 47 transitions, 108 flow [2024-11-20 17:47:15,462 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=108, PETRI_PLACES=46, PETRI_TRANSITIONS=47} [2024-11-20 17:47:15,463 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -12 predicate places. [2024-11-20 17:47:15,463 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 47 transitions, 108 flow [2024-11-20 17:47:15,463 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:15,463 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:15,463 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-20 17:47:15,463 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-20 17:47:15,464 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:47:15,464 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:15,464 INFO L85 PathProgramCache]: Analyzing trace with hash 146355161, now seen corresponding path program 1 times [2024-11-20 17:47:15,464 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:15,465 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1181014303] [2024-11-20 17:47:15,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:15,465 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:15,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:15,531 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:15,531 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:15,531 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1181014303] [2024-11-20 17:47:15,532 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1181014303] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:15,532 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:15,532 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-20 17:47:15,532 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353976590] [2024-11-20 17:47:15,532 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:15,533 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-20 17:47:15,533 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:15,533 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-20 17:47:15,533 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-20 17:47:15,539 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2024-11-20 17:47:15,540 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 47 transitions, 108 flow. Second operand has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:15,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:15,540 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2024-11-20 17:47:15,540 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:15,696 INFO L124 PetriNetUnfolderBase]: 920/1346 cut-off events. [2024-11-20 17:47:15,696 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-20 17:47:15,699 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2652 conditions, 1346 events. 920/1346 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 5513 event pairs, 608 based on Foata normal form. 1/1277 useless extension candidates. Maximal degree in co-relation 2628. Up to 1268 conditions per place. [2024-11-20 17:47:15,710 INFO L140 encePairwiseOnDemand]: 55/58 looper letters, 34 selfloop transitions, 2 changer transitions 0/46 dead transitions. [2024-11-20 17:47:15,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 46 transitions, 176 flow [2024-11-20 17:47:15,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-20 17:47:15,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-20 17:47:15,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 94 transitions. [2024-11-20 17:47:15,713 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5402298850574713 [2024-11-20 17:47:15,713 INFO L175 Difference]: Start difference. First operand has 46 places, 47 transitions, 108 flow. Second operand 3 states and 94 transitions. [2024-11-20 17:47:15,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 46 transitions, 176 flow [2024-11-20 17:47:15,714 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 46 places, 46 transitions, 172 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:47:15,715 INFO L231 Difference]: Finished difference. Result has 46 places, 46 transitions, 104 flow [2024-11-20 17:47:15,715 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=100, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=104, PETRI_PLACES=46, PETRI_TRANSITIONS=46} [2024-11-20 17:47:15,716 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -12 predicate places. [2024-11-20 17:47:15,716 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 46 transitions, 104 flow [2024-11-20 17:47:15,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.333333333333332) internal successors, (64), 3 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:15,716 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:15,716 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:15,716 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-20 17:47:15,717 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:47:15,717 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:15,717 INFO L85 PathProgramCache]: Analyzing trace with hash 193199091, now seen corresponding path program 1 times [2024-11-20 17:47:15,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:15,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1326219249] [2024-11-20 17:47:15,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:15,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:15,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:15,881 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:15,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:15,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1326219249] [2024-11-20 17:47:15,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1326219249] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:15,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45855086] [2024-11-20 17:47:15,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:15,882 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:15,882 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:15,885 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) [2024-11-20 17:47:15,888 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-20 17:47:15,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:15,960 INFO L255 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-20 17:47:15,961 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:16,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:16,048 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:16,101 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2024-11-20 17:47:16,114 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:16,115 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45855086] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:16,115 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:16,115 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2024-11-20 17:47:16,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470627468] [2024-11-20 17:47:16,116 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:16,116 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-20 17:47:16,116 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:16,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-20 17:47:16,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2024-11-20 17:47:16,269 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 58 [2024-11-20 17:47:16,270 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 46 transitions, 104 flow. Second operand has 9 states, 9 states have (on average 19.444444444444443) internal successors, (175), 9 states have internal predecessors, (175), 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) [2024-11-20 17:47:16,270 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:16,270 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 58 [2024-11-20 17:47:16,270 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:16,710 INFO L124 PetriNetUnfolderBase]: 1680/2529 cut-off events. [2024-11-20 17:47:16,711 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2024-11-20 17:47:16,714 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4868 conditions, 2529 events. 1680/2529 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 140. Compared 12419 event pairs, 483 based on Foata normal form. 0/2360 useless extension candidates. Maximal degree in co-relation 4857. Up to 1041 conditions per place. [2024-11-20 17:47:16,725 INFO L140 encePairwiseOnDemand]: 49/58 looper letters, 65 selfloop transitions, 9 changer transitions 0/82 dead transitions. [2024-11-20 17:47:16,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 82 transitions, 328 flow [2024-11-20 17:47:16,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:47:16,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:47:16,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 200 transitions. [2024-11-20 17:47:16,726 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49261083743842365 [2024-11-20 17:47:16,726 INFO L175 Difference]: Start difference. First operand has 46 places, 46 transitions, 104 flow. Second operand 7 states and 200 transitions. [2024-11-20 17:47:16,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 82 transitions, 328 flow [2024-11-20 17:47:16,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 82 transitions, 324 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:47:16,729 INFO L231 Difference]: Finished difference. Result has 51 places, 48 transitions, 138 flow [2024-11-20 17:47:16,729 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=98, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=138, PETRI_PLACES=51, PETRI_TRANSITIONS=48} [2024-11-20 17:47:16,730 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -7 predicate places. [2024-11-20 17:47:16,730 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 48 transitions, 138 flow [2024-11-20 17:47:16,730 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 19.444444444444443) internal successors, (175), 9 states have internal predecessors, (175), 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) [2024-11-20 17:47:16,730 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:16,730 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:16,739 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-20 17:47:16,934 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,SelfDestructingSolverStorable5 [2024-11-20 17:47:16,935 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:47:16,935 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:16,936 INFO L85 PathProgramCache]: Analyzing trace with hash 974478481, now seen corresponding path program 1 times [2024-11-20 17:47:16,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:16,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082328651] [2024-11-20 17:47:16,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:16,936 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:16,949 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:17,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:17,047 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:17,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082328651] [2024-11-20 17:47:17,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082328651] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:17,047 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [352247507] [2024-11-20 17:47:17,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:17,048 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:17,048 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:17,050 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) [2024-11-20 17:47:17,052 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-20 17:47:17,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:17,123 INFO L255 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:47:17,124 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:17,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:17,183 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:17,250 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:17,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [352247507] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:17,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:17,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 12 [2024-11-20 17:47:17,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044005680] [2024-11-20 17:47:17,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:17,252 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-20 17:47:17,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:17,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-20 17:47:17,253 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=115, Unknown=0, NotChecked=0, Total=156 [2024-11-20 17:47:17,320 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-20 17:47:17,321 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 48 transitions, 138 flow. Second operand has 13 states, 13 states have (on average 20.846153846153847) internal successors, (271), 13 states have internal predecessors, (271), 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) [2024-11-20 17:47:17,321 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:17,321 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-20 17:47:17,321 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:17,887 INFO L124 PetriNetUnfolderBase]: 2559/3899 cut-off events. [2024-11-20 17:47:17,888 INFO L125 PetriNetUnfolderBase]: For 1568/1623 co-relation queries the response was YES. [2024-11-20 17:47:17,894 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8790 conditions, 3899 events. 2559/3899 cut-off events. For 1568/1623 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 20169 event pairs, 1504 based on Foata normal form. 0/3620 useless extension candidates. Maximal degree in co-relation 6023. Up to 2430 conditions per place. [2024-11-20 17:47:17,917 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 76 selfloop transitions, 8 changer transitions 0/92 dead transitions. [2024-11-20 17:47:17,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 92 transitions, 446 flow [2024-11-20 17:47:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:47:17,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:47:17,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 209 transitions. [2024-11-20 17:47:17,919 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5147783251231527 [2024-11-20 17:47:17,919 INFO L175 Difference]: Start difference. First operand has 51 places, 48 transitions, 138 flow. Second operand 7 states and 209 transitions. [2024-11-20 17:47:17,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 92 transitions, 446 flow [2024-11-20 17:47:17,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 92 transitions, 440 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:47:17,923 INFO L231 Difference]: Finished difference. Result has 56 places, 50 transitions, 163 flow [2024-11-20 17:47:17,925 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=163, PETRI_PLACES=56, PETRI_TRANSITIONS=50} [2024-11-20 17:47:17,926 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, -2 predicate places. [2024-11-20 17:47:17,926 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 50 transitions, 163 flow [2024-11-20 17:47:17,927 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 20.846153846153847) internal successors, (271), 13 states have internal predecessors, (271), 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) [2024-11-20 17:47:17,927 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:17,927 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:17,936 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:18,131 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:18,132 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:47:18,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:18,135 INFO L85 PathProgramCache]: Analyzing trace with hash -878016597, now seen corresponding path program 2 times [2024-11-20 17:47:18,135 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:18,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070915938] [2024-11-20 17:47:18,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:18,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:18,152 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:18,328 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:18,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:18,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070915938] [2024-11-20 17:47:18,329 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1070915938] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:18,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [428437966] [2024-11-20 17:47:18,329 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:47:18,330 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:18,330 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:18,332 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) [2024-11-20 17:47:18,333 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-20 17:47:18,406 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-20 17:47:18,406 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:18,408 INFO L255 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-20 17:47:18,409 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:18,421 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 [2024-11-20 17:47:18,614 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:47:18,615 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-20 17:47:18,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [428437966] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:18,615 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-20 17:47:18,615 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2024-11-20 17:47:18,615 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566895727] [2024-11-20 17:47:18,615 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:18,616 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:47:18,616 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:18,616 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:47:18,616 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=87, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:47:18,694 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 58 [2024-11-20 17:47:18,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 50 transitions, 163 flow. Second operand has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 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) [2024-11-20 17:47:18,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:18,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 58 [2024-11-20 17:47:18,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:19,403 INFO L124 PetriNetUnfolderBase]: 4429/6342 cut-off events. [2024-11-20 17:47:19,404 INFO L125 PetriNetUnfolderBase]: For 3105/3229 co-relation queries the response was YES. [2024-11-20 17:47:19,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15462 conditions, 6342 events. 4429/6342 cut-off events. For 3105/3229 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 31580 event pairs, 1966 based on Foata normal form. 0/5671 useless extension candidates. Maximal degree in co-relation 12289. Up to 3995 conditions per place. [2024-11-20 17:47:19,439 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 77 selfloop transitions, 9 changer transitions 0/92 dead transitions. [2024-11-20 17:47:19,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 92 transitions, 471 flow [2024-11-20 17:47:19,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-20 17:47:19,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-20 17:47:19,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 174 transitions. [2024-11-20 17:47:19,442 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-20 17:47:19,442 INFO L175 Difference]: Start difference. First operand has 56 places, 50 transitions, 163 flow. Second operand 6 states and 174 transitions. [2024-11-20 17:47:19,442 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 92 transitions, 471 flow [2024-11-20 17:47:19,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 92 transitions, 460 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-20 17:47:19,450 INFO L231 Difference]: Finished difference. Result has 59 places, 53 transitions, 197 flow [2024-11-20 17:47:19,450 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=152, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=197, PETRI_PLACES=59, PETRI_TRANSITIONS=53} [2024-11-20 17:47:19,452 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 1 predicate places. [2024-11-20 17:47:19,452 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 53 transitions, 197 flow [2024-11-20 17:47:19,453 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.666666666666668) internal successors, (112), 6 states have internal predecessors, (112), 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) [2024-11-20 17:47:19,453 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:19,453 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:19,462 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-20 17:47:19,657 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:19,658 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:47:19,658 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:19,658 INFO L85 PathProgramCache]: Analyzing trace with hash 140386399, now seen corresponding path program 1 times [2024-11-20 17:47:19,658 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:19,658 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [283207846] [2024-11-20 17:47:19,659 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:19,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:19,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:19,829 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:19,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:19,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [283207846] [2024-11-20 17:47:19,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [283207846] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:19,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:19,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:47:19,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703134871] [2024-11-20 17:47:19,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:19,831 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-20 17:47:19,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:19,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-20 17:47:19,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-20 17:47:19,930 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 58 [2024-11-20 17:47:19,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 53 transitions, 197 flow. Second operand has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 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) [2024-11-20 17:47:19,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:19,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 58 [2024-11-20 17:47:19,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:20,577 INFO L124 PetriNetUnfolderBase]: 4070/6291 cut-off events. [2024-11-20 17:47:20,578 INFO L125 PetriNetUnfolderBase]: For 5358/5571 co-relation queries the response was YES. [2024-11-20 17:47:20,593 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16202 conditions, 6291 events. 4070/6291 cut-off events. For 5358/5571 co-relation queries the response was YES. Maximal size of possible extension queue 214. Compared 34773 event pairs, 1771 based on Foata normal form. 22/6098 useless extension candidates. Maximal degree in co-relation 11971. Up to 3722 conditions per place. [2024-11-20 17:47:20,625 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 60 selfloop transitions, 7 changer transitions 0/77 dead transitions. [2024-11-20 17:47:20,626 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 77 transitions, 436 flow [2024-11-20 17:47:20,626 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:47:20,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:47:20,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 149 transitions. [2024-11-20 17:47:20,627 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5137931034482759 [2024-11-20 17:47:20,627 INFO L175 Difference]: Start difference. First operand has 59 places, 53 transitions, 197 flow. Second operand 5 states and 149 transitions. [2024-11-20 17:47:20,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 77 transitions, 436 flow [2024-11-20 17:47:20,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 77 transitions, 414 flow, removed 3 selfloop flow, removed 3 redundant places. [2024-11-20 17:47:20,638 INFO L231 Difference]: Finished difference. Result has 62 places, 55 transitions, 216 flow [2024-11-20 17:47:20,638 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=216, PETRI_PLACES=62, PETRI_TRANSITIONS=55} [2024-11-20 17:47:20,639 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 4 predicate places. [2024-11-20 17:47:20,639 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 55 transitions, 216 flow [2024-11-20 17:47:20,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.833333333333332) internal successors, (131), 6 states have internal predecessors, (131), 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) [2024-11-20 17:47:20,639 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:20,639 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:20,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-20 17:47:20,639 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:47:20,640 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:20,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1910108667, now seen corresponding path program 1 times [2024-11-20 17:47:20,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:20,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687113506] [2024-11-20 17:47:20,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:20,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:20,665 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:20,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:20,765 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:20,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687113506] [2024-11-20 17:47:20,765 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [687113506] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:20,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097769171] [2024-11-20 17:47:20,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:20,766 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:20,766 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:20,769 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) [2024-11-20 17:47:20,771 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-20 17:47:20,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:20,847 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-20 17:47:20,848 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:20,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:20,925 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:20,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:20,993 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2097769171] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:20,993 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:20,994 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-20 17:47:20,994 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [652829257] [2024-11-20 17:47:20,994 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:20,995 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:47:20,995 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:20,995 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:47:20,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:47:21,060 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-20 17:47:21,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 55 transitions, 216 flow. Second operand has 14 states, 14 states have (on average 21.142857142857142) internal successors, (296), 14 states have internal predecessors, (296), 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) [2024-11-20 17:47:21,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:21,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-20 17:47:21,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:21,893 INFO L124 PetriNetUnfolderBase]: 4550/6843 cut-off events. [2024-11-20 17:47:21,893 INFO L125 PetriNetUnfolderBase]: For 6628/6928 co-relation queries the response was YES. [2024-11-20 17:47:21,912 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18985 conditions, 6843 events. 4550/6843 cut-off events. For 6628/6928 co-relation queries the response was YES. Maximal size of possible extension queue 228. Compared 36198 event pairs, 2603 based on Foata normal form. 176/6977 useless extension candidates. Maximal degree in co-relation 15177. Up to 4992 conditions per place. [2024-11-20 17:47:21,946 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 89 selfloop transitions, 10 changer transitions 0/108 dead transitions. [2024-11-20 17:47:21,946 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 108 transitions, 636 flow [2024-11-20 17:47:21,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:47:21,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:47:21,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 239 transitions. [2024-11-20 17:47:21,948 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5150862068965517 [2024-11-20 17:47:21,948 INFO L175 Difference]: Start difference. First operand has 62 places, 55 transitions, 216 flow. Second operand 8 states and 239 transitions. [2024-11-20 17:47:21,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 108 transitions, 636 flow [2024-11-20 17:47:21,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 108 transitions, 632 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-20 17:47:21,956 INFO L231 Difference]: Finished difference. Result has 70 places, 59 transitions, 273 flow [2024-11-20 17:47:21,957 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=212, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=273, PETRI_PLACES=70, PETRI_TRANSITIONS=59} [2024-11-20 17:47:21,959 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 12 predicate places. [2024-11-20 17:47:21,959 INFO L471 AbstractCegarLoop]: Abstraction has has 70 places, 59 transitions, 273 flow [2024-11-20 17:47:21,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.142857142857142) internal successors, (296), 14 states have internal predecessors, (296), 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) [2024-11-20 17:47:21,959 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:21,959 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:21,968 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:22,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-20 17:47:22,160 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:47:22,161 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:22,161 INFO L85 PathProgramCache]: Analyzing trace with hash -221200747, now seen corresponding path program 2 times [2024-11-20 17:47:22,162 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:22,162 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161782751] [2024-11-20 17:47:22,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:22,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:22,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:22,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:22,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:22,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161782751] [2024-11-20 17:47:22,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [161782751] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:22,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [751637080] [2024-11-20 17:47:22,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:47:22,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:22,372 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:22,375 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) [2024-11-20 17:47:22,377 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-20 17:47:22,448 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:47:22,449 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:22,450 INFO L255 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-20 17:47:22,451 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:22,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:22,544 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:22,653 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 [2024-11-20 17:47:22,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:22,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [751637080] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:22,710 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:22,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 14 [2024-11-20 17:47:22,710 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [196079213] [2024-11-20 17:47:22,710 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:22,711 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2024-11-20 17:47:22,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:22,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2024-11-20 17:47:22,712 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2024-11-20 17:47:23,032 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 58 [2024-11-20 17:47:23,033 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 70 places, 59 transitions, 273 flow. Second operand has 16 states, 16 states have (on average 19.8125) internal successors, (317), 16 states have internal predecessors, (317), 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) [2024-11-20 17:47:23,033 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:23,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 58 [2024-11-20 17:47:23,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:24,015 INFO L124 PetriNetUnfolderBase]: 5346/8019 cut-off events. [2024-11-20 17:47:24,015 INFO L125 PetriNetUnfolderBase]: For 9230/9774 co-relation queries the response was YES. [2024-11-20 17:47:24,040 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23131 conditions, 8019 events. 5346/8019 cut-off events. For 9230/9774 co-relation queries the response was YES. Maximal size of possible extension queue 222. Compared 43464 event pairs, 1275 based on Foata normal form. 274/8272 useless extension candidates. Maximal degree in co-relation 19380. Up to 2199 conditions per place. [2024-11-20 17:47:24,154 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 137 selfloop transitions, 14 changer transitions 0/160 dead transitions. [2024-11-20 17:47:24,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 160 transitions, 967 flow [2024-11-20 17:47:24,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-20 17:47:24,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-11-20 17:47:24,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 311 transitions. [2024-11-20 17:47:24,157 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5362068965517242 [2024-11-20 17:47:24,158 INFO L175 Difference]: Start difference. First operand has 70 places, 59 transitions, 273 flow. Second operand 10 states and 311 transitions. [2024-11-20 17:47:24,158 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 160 transitions, 967 flow [2024-11-20 17:47:24,176 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 160 transitions, 954 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-20 17:47:24,178 INFO L231 Difference]: Finished difference. Result has 78 places, 63 transitions, 330 flow [2024-11-20 17:47:24,179 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=260, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=330, PETRI_PLACES=78, PETRI_TRANSITIONS=63} [2024-11-20 17:47:24,179 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 20 predicate places. [2024-11-20 17:47:24,180 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 63 transitions, 330 flow [2024-11-20 17:47:24,180 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 19.8125) internal successors, (317), 16 states have internal predecessors, (317), 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) [2024-11-20 17:47:24,180 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:24,180 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:24,189 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-20 17:47:24,384 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 [2024-11-20 17:47:24,385 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:47:24,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:24,385 INFO L85 PathProgramCache]: Analyzing trace with hash -1046020415, now seen corresponding path program 1 times [2024-11-20 17:47:24,386 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:24,386 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432508988] [2024-11-20 17:47:24,386 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:24,386 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:24,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:24,582 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:24,583 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:24,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432508988] [2024-11-20 17:47:24,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432508988] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:24,583 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [784739526] [2024-11-20 17:47:24,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:24,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:24,584 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:24,587 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) [2024-11-20 17:47:24,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-20 17:47:24,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:24,667 INFO L255 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-20 17:47:24,669 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:24,790 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:24,790 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:24,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:24,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [784739526] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:24,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:24,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2024-11-20 17:47:24,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719475270] [2024-11-20 17:47:24,858 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:24,858 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-20 17:47:24,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:24,861 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-20 17:47:24,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=133, Unknown=0, NotChecked=0, Total=182 [2024-11-20 17:47:24,918 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-20 17:47:24,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 63 transitions, 330 flow. Second operand has 14 states, 14 states have (on average 21.357142857142858) internal successors, (299), 14 states have internal predecessors, (299), 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) [2024-11-20 17:47:24,919 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:24,919 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-20 17:47:24,919 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:25,729 INFO L124 PetriNetUnfolderBase]: 6186/8992 cut-off events. [2024-11-20 17:47:25,729 INFO L125 PetriNetUnfolderBase]: For 17815/18436 co-relation queries the response was YES. [2024-11-20 17:47:25,755 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28124 conditions, 8992 events. 6186/8992 cut-off events. For 17815/18436 co-relation queries the response was YES. Maximal size of possible extension queue 246. Compared 45868 event pairs, 3675 based on Foata normal form. 232/9188 useless extension candidates. Maximal degree in co-relation 24570. Up to 7248 conditions per place. [2024-11-20 17:47:25,798 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 86 selfloop transitions, 10 changer transitions 0/105 dead transitions. [2024-11-20 17:47:25,798 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 105 transitions, 728 flow [2024-11-20 17:47:25,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-20 17:47:25,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-20 17:47:25,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 236 transitions. [2024-11-20 17:47:25,800 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5086206896551724 [2024-11-20 17:47:25,800 INFO L175 Difference]: Start difference. First operand has 78 places, 63 transitions, 330 flow. Second operand 8 states and 236 transitions. [2024-11-20 17:47:25,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 105 transitions, 728 flow [2024-11-20 17:47:25,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 105 transitions, 682 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-11-20 17:47:25,823 INFO L231 Difference]: Finished difference. Result has 82 places, 67 transitions, 363 flow [2024-11-20 17:47:25,823 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=302, PETRI_DIFFERENCE_MINUEND_PLACES=72, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=363, PETRI_PLACES=82, PETRI_TRANSITIONS=67} [2024-11-20 17:47:25,824 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 24 predicate places. [2024-11-20 17:47:25,824 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 67 transitions, 363 flow [2024-11-20 17:47:25,824 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 21.357142857142858) internal successors, (299), 14 states have internal predecessors, (299), 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) [2024-11-20 17:47:25,825 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:25,825 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:25,833 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:26,028 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 [2024-11-20 17:47:26,029 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:47:26,029 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:26,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1609139379, now seen corresponding path program 1 times [2024-11-20 17:47:26,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:26,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1750774743] [2024-11-20 17:47:26,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:26,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:26,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:26,160 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:26,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:26,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1750774743] [2024-11-20 17:47:26,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1750774743] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:26,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532473674] [2024-11-20 17:47:26,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:26,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:26,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:26,164 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) [2024-11-20 17:47:26,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-20 17:47:26,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:26,245 INFO L255 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-20 17:47:26,247 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:26,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:26,385 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:26,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 2 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:26,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1532473674] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:26,477 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:26,477 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-20 17:47:26,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1605132862] [2024-11-20 17:47:26,477 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:26,478 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-20 17:47:26,478 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:26,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-20 17:47:26,478 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2024-11-20 17:47:26,561 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-20 17:47:26,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 67 transitions, 363 flow. Second operand has 18 states, 18 states have (on average 21.27777777777778) internal successors, (383), 18 states have internal predecessors, (383), 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) [2024-11-20 17:47:26,561 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:26,561 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-20 17:47:26,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:27,777 INFO L124 PetriNetUnfolderBase]: 9395/13906 cut-off events. [2024-11-20 17:47:27,777 INFO L125 PetriNetUnfolderBase]: For 27659/28273 co-relation queries the response was YES. [2024-11-20 17:47:27,815 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45497 conditions, 13906 events. 9395/13906 cut-off events. For 27659/28273 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 78530 event pairs, 4286 based on Foata normal form. 0/13731 useless extension candidates. Maximal degree in co-relation 25272. Up to 6944 conditions per place. [2024-11-20 17:47:27,879 INFO L140 encePairwiseOnDemand]: 50/58 looper letters, 140 selfloop transitions, 14 changer transitions 0/162 dead transitions. [2024-11-20 17:47:27,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 162 transitions, 1221 flow [2024-11-20 17:47:27,880 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-20 17:47:27,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-20 17:47:27,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 271 transitions. [2024-11-20 17:47:27,881 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5191570881226054 [2024-11-20 17:47:27,881 INFO L175 Difference]: Start difference. First operand has 82 places, 67 transitions, 363 flow. Second operand 9 states and 271 transitions. [2024-11-20 17:47:27,881 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 162 transitions, 1221 flow [2024-11-20 17:47:27,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 162 transitions, 1202 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-20 17:47:27,942 INFO L231 Difference]: Finished difference. Result has 91 places, 74 transitions, 446 flow [2024-11-20 17:47:27,942 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=350, PETRI_DIFFERENCE_MINUEND_PLACES=78, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=446, PETRI_PLACES=91, PETRI_TRANSITIONS=74} [2024-11-20 17:47:27,943 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 33 predicate places. [2024-11-20 17:47:27,943 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 74 transitions, 446 flow [2024-11-20 17:47:27,943 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 21.27777777777778) internal successors, (383), 18 states have internal predecessors, (383), 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) [2024-11-20 17:47:27,944 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:27,944 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:27,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-20 17:47:28,144 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 [2024-11-20 17:47:28,145 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:47:28,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:28,145 INFO L85 PathProgramCache]: Analyzing trace with hash 1911731175, now seen corresponding path program 2 times [2024-11-20 17:47:28,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:28,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1899363393] [2024-11-20 17:47:28,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:28,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:28,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:28,379 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:28,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:28,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1899363393] [2024-11-20 17:47:28,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1899363393] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:28,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255536126] [2024-11-20 17:47:28,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:47:28,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:28,380 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:28,381 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) [2024-11-20 17:47:28,383 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-20 17:47:28,464 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:47:28,464 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:28,466 INFO L255 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-20 17:47:28,467 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:28,681 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:28,681 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:29,051 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 35 treesize of output 31 [2024-11-20 17:47:29,112 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-20 17:47:29,112 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255536126] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:29,112 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:29,112 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2024-11-20 17:47:29,112 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [845779476] [2024-11-20 17:47:29,112 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:29,113 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 17:47:29,113 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:29,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 17:47:29,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2024-11-20 17:47:29,519 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-20 17:47:29,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 74 transitions, 446 flow. Second operand has 20 states, 20 states have (on average 21.4) internal successors, (428), 20 states have internal predecessors, (428), 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) [2024-11-20 17:47:29,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:29,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-20 17:47:29,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:31,147 INFO L124 PetriNetUnfolderBase]: 10112/14006 cut-off events. [2024-11-20 17:47:31,147 INFO L125 PetriNetUnfolderBase]: For 32497/34438 co-relation queries the response was YES. [2024-11-20 17:47:31,191 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49131 conditions, 14006 events. 10112/14006 cut-off events. For 32497/34438 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 71278 event pairs, 1895 based on Foata normal form. 696/14675 useless extension candidates. Maximal degree in co-relation 37275. Up to 4458 conditions per place. [2024-11-20 17:47:31,255 INFO L140 encePairwiseOnDemand]: 51/58 looper letters, 147 selfloop transitions, 14 changer transitions 0/170 dead transitions. [2024-11-20 17:47:31,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 170 transitions, 1390 flow [2024-11-20 17:47:31,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-20 17:47:31,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-20 17:47:31,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 214 transitions. [2024-11-20 17:47:31,257 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5270935960591133 [2024-11-20 17:47:31,257 INFO L175 Difference]: Start difference. First operand has 91 places, 74 transitions, 446 flow. Second operand 7 states and 214 transitions. [2024-11-20 17:47:31,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 170 transitions, 1390 flow [2024-11-20 17:47:31,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 170 transitions, 1369 flow, removed 8 selfloop flow, removed 2 redundant places. [2024-11-20 17:47:31,317 INFO L231 Difference]: Finished difference. Result has 95 places, 75 transitions, 481 flow [2024-11-20 17:47:31,317 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=433, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=60, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=481, PETRI_PLACES=95, PETRI_TRANSITIONS=75} [2024-11-20 17:47:31,318 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 37 predicate places. [2024-11-20 17:47:31,318 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 75 transitions, 481 flow [2024-11-20 17:47:31,318 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 21.4) internal successors, (428), 20 states have internal predecessors, (428), 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) [2024-11-20 17:47:31,318 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:31,318 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-20 17:47:31,327 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-20 17:47:31,519 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 [2024-11-20 17:47:31,519 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:47:31,519 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:31,520 INFO L85 PathProgramCache]: Analyzing trace with hash -1189841843, now seen corresponding path program 2 times [2024-11-20 17:47:31,520 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:31,520 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561852125] [2024-11-20 17:47:31,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:31,520 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:31,794 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-20 17:47:31,794 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:31,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561852125] [2024-11-20 17:47:31,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1561852125] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:31,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619201121] [2024-11-20 17:47:31,794 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:47:31,795 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:31,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:31,797 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) [2024-11-20 17:47:31,803 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-20 17:47:31,874 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:47:31,874 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:31,875 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 18 conjuncts are in the unsatisfiable core [2024-11-20 17:47:31,876 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:32,032 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:32,032 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:32,129 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 [2024-11-20 17:47:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:32,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1619201121] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:32,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:32,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2024-11-20 17:47:32,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1865612156] [2024-11-20 17:47:32,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:32,198 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-20 17:47:32,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:32,199 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-20 17:47:32,199 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2024-11-20 17:47:32,697 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 58 [2024-11-20 17:47:32,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 75 transitions, 481 flow. Second operand has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2024-11-20 17:47:32,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:32,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 58 [2024-11-20 17:47:32,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:34,895 INFO L124 PetriNetUnfolderBase]: 11631/16299 cut-off events. [2024-11-20 17:47:34,896 INFO L125 PetriNetUnfolderBase]: For 51606/53061 co-relation queries the response was YES. [2024-11-20 17:47:34,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60392 conditions, 16299 events. 11631/16299 cut-off events. For 51606/53061 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 84799 event pairs, 1539 based on Foata normal form. 640/16609 useless extension candidates. Maximal degree in co-relation 39359. Up to 2716 conditions per place. [2024-11-20 17:47:35,027 INFO L140 encePairwiseOnDemand]: 49/58 looper letters, 254 selfloop transitions, 21 changer transitions 0/282 dead transitions. [2024-11-20 17:47:35,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 282 transitions, 2287 flow [2024-11-20 17:47:35,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 17:47:35,028 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-20 17:47:35,030 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 475 transitions. [2024-11-20 17:47:35,030 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5118534482758621 [2024-11-20 17:47:35,030 INFO L175 Difference]: Start difference. First operand has 95 places, 75 transitions, 481 flow. Second operand 16 states and 475 transitions. [2024-11-20 17:47:35,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 282 transitions, 2287 flow [2024-11-20 17:47:35,163 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 282 transitions, 2169 flow, removed 17 selfloop flow, removed 4 redundant places. [2024-11-20 17:47:35,167 INFO L231 Difference]: Finished difference. Result has 105 places, 76 transitions, 509 flow [2024-11-20 17:47:35,167 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=445, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=509, PETRI_PLACES=105, PETRI_TRANSITIONS=76} [2024-11-20 17:47:35,168 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 47 predicate places. [2024-11-20 17:47:35,168 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 76 transitions, 509 flow [2024-11-20 17:47:35,169 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 19.318181818181817) internal successors, (425), 22 states have internal predecessors, (425), 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) [2024-11-20 17:47:35,169 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:35,169 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-20 17:47:35,178 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-20 17:47:35,370 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,SelfDestructingSolverStorable14 [2024-11-20 17:47:35,370 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:47:35,370 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:35,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1981770851, now seen corresponding path program 3 times [2024-11-20 17:47:35,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:35,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882007194] [2024-11-20 17:47:35,371 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:35,371 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:35,383 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:35,496 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:35,496 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:35,496 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882007194] [2024-11-20 17:47:35,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882007194] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:35,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181828294] [2024-11-20 17:47:35,497 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:47:35,497 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:35,497 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:35,500 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) [2024-11-20 17:47:35,502 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-20 17:47:35,571 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 17:47:35,571 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:35,572 INFO L255 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-20 17:47:35,574 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:35,688 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:47:35,689 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:35,935 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 13 treesize of output 11 [2024-11-20 17:47:35,944 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-20 17:47:35,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181828294] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:35,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:35,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 6, 6] total 19 [2024-11-20 17:47:35,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876155882] [2024-11-20 17:47:35,945 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:35,945 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-20 17:47:35,945 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:35,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-20 17:47:35,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2024-11-20 17:47:36,289 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 58 [2024-11-20 17:47:36,290 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 76 transitions, 509 flow. Second operand has 20 states, 20 states have (on average 19.35) internal successors, (387), 20 states have internal predecessors, (387), 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) [2024-11-20 17:47:36,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:36,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 58 [2024-11-20 17:47:36,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:38,476 INFO L124 PetriNetUnfolderBase]: 11024/15644 cut-off events. [2024-11-20 17:47:38,476 INFO L125 PetriNetUnfolderBase]: For 43848/45316 co-relation queries the response was YES. [2024-11-20 17:47:38,546 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55654 conditions, 15644 events. 11024/15644 cut-off events. For 43848/45316 co-relation queries the response was YES. Maximal size of possible extension queue 340. Compared 83106 event pairs, 1796 based on Foata normal form. 242/15862 useless extension candidates. Maximal degree in co-relation 43631. Up to 4056 conditions per place. [2024-11-20 17:47:38,786 INFO L140 encePairwiseOnDemand]: 49/58 looper letters, 256 selfloop transitions, 27 changer transitions 0/291 dead transitions. [2024-11-20 17:47:38,787 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 119 places, 291 transitions, 2357 flow [2024-11-20 17:47:38,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-20 17:47:38,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 16 states. [2024-11-20 17:47:38,789 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 473 transitions. [2024-11-20 17:47:38,790 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.509698275862069 [2024-11-20 17:47:38,790 INFO L175 Difference]: Start difference. First operand has 105 places, 76 transitions, 509 flow. Second operand 16 states and 473 transitions. [2024-11-20 17:47:38,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 119 places, 291 transitions, 2357 flow [2024-11-20 17:47:38,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 291 transitions, 2052 flow, removed 37 selfloop flow, removed 15 redundant places. [2024-11-20 17:47:38,858 INFO L231 Difference]: Finished difference. Result has 109 places, 84 transitions, 579 flow [2024-11-20 17:47:38,859 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=424, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=16, PETRI_FLOW=579, PETRI_PLACES=109, PETRI_TRANSITIONS=84} [2024-11-20 17:47:38,859 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 51 predicate places. [2024-11-20 17:47:38,859 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 84 transitions, 579 flow [2024-11-20 17:47:38,859 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 19.35) internal successors, (387), 20 states have internal predecessors, (387), 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) [2024-11-20 17:47:38,860 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:38,860 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] [2024-11-20 17:47:38,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2024-11-20 17:47:39,060 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,SelfDestructingSolverStorable15 [2024-11-20 17:47:39,061 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:47:39,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:39,061 INFO L85 PathProgramCache]: Analyzing trace with hash 1952924736, now seen corresponding path program 1 times [2024-11-20 17:47:39,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:39,061 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234894927] [2024-11-20 17:47:39,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:39,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:39,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:39,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:39,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234894927] [2024-11-20 17:47:39,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234894927] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:39,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980220163] [2024-11-20 17:47:39,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:39,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:39,252 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:39,255 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) [2024-11-20 17:47:39,256 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-20 17:47:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:39,336 INFO L255 TraceCheckSpWp]: Trace formula consists of 179 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-20 17:47:39,337 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:39,366 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:39,366 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:39,399 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:39,400 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980220163] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:39,400 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-20 17:47:39,400 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6, 4] total 10 [2024-11-20 17:47:39,400 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1929160677] [2024-11-20 17:47:39,400 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:39,400 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-20 17:47:39,401 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:39,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-20 17:47:39,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2024-11-20 17:47:39,414 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-20 17:47:39,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 84 transitions, 579 flow. Second operand has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 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) [2024-11-20 17:47:39,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:39,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-20 17:47:39,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:40,662 INFO L124 PetriNetUnfolderBase]: 10744/15356 cut-off events. [2024-11-20 17:47:40,662 INFO L125 PetriNetUnfolderBase]: For 43230/44187 co-relation queries the response was YES. [2024-11-20 17:47:40,695 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53085 conditions, 15356 events. 10744/15356 cut-off events. For 43230/44187 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 84312 event pairs, 2227 based on Foata normal form. 280/15612 useless extension candidates. Maximal degree in co-relation 41834. Up to 9604 conditions per place. [2024-11-20 17:47:40,742 INFO L140 encePairwiseOnDemand]: 52/58 looper letters, 92 selfloop transitions, 13 changer transitions 0/113 dead transitions. [2024-11-20 17:47:40,742 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 113 transitions, 936 flow [2024-11-20 17:47:40,742 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-20 17:47:40,742 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-20 17:47:40,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 144 transitions. [2024-11-20 17:47:40,743 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.496551724137931 [2024-11-20 17:47:40,743 INFO L175 Difference]: Start difference. First operand has 109 places, 84 transitions, 579 flow. Second operand 5 states and 144 transitions. [2024-11-20 17:47:40,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 113 transitions, 936 flow [2024-11-20 17:47:40,799 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 113 transitions, 893 flow, removed 10 selfloop flow, removed 8 redundant places. [2024-11-20 17:47:40,801 INFO L231 Difference]: Finished difference. Result has 105 places, 81 transitions, 529 flow [2024-11-20 17:47:40,802 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=503, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=529, PETRI_PLACES=105, PETRI_TRANSITIONS=81} [2024-11-20 17:47:40,803 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 47 predicate places. [2024-11-20 17:47:40,803 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 81 transitions, 529 flow [2024-11-20 17:47:40,803 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 23.0) internal successors, (115), 5 states have internal predecessors, (115), 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) [2024-11-20 17:47:40,803 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:40,803 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] [2024-11-20 17:47:40,812 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-20 17:47:41,007 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-20 17:47:41,008 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:47:41,008 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:41,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1015398688, now seen corresponding path program 1 times [2024-11-20 17:47:41,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:41,008 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592648583] [2024-11-20 17:47:41,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:41,008 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:41,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:41,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:47:41,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:41,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592648583] [2024-11-20 17:47:41,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592648583] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-20 17:47:41,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-20 17:47:41,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-20 17:47:41,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440587646] [2024-11-20 17:47:41,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-20 17:47:41,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-20 17:47:41,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:41,061 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-20 17:47:41,061 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-20 17:47:41,071 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 58 [2024-11-20 17:47:41,071 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 81 transitions, 529 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:41,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:41,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 58 [2024-11-20 17:47:41,072 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:42,497 INFO L124 PetriNetUnfolderBase]: 10788/15040 cut-off events. [2024-11-20 17:47:42,498 INFO L125 PetriNetUnfolderBase]: For 42545/43289 co-relation queries the response was YES. [2024-11-20 17:47:42,552 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51984 conditions, 15040 events. 10788/15040 cut-off events. For 42545/43289 co-relation queries the response was YES. Maximal size of possible extension queue 342. Compared 77664 event pairs, 3059 based on Foata normal form. 409/15044 useless extension candidates. Maximal degree in co-relation 36988. Up to 8002 conditions per place. [2024-11-20 17:47:42,616 INFO L140 encePairwiseOnDemand]: 53/58 looper letters, 101 selfloop transitions, 9 changer transitions 0/119 dead transitions. [2024-11-20 17:47:42,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 119 transitions, 1021 flow [2024-11-20 17:47:42,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-20 17:47:42,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-20 17:47:42,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 124 transitions. [2024-11-20 17:47:42,618 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5344827586206896 [2024-11-20 17:47:42,618 INFO L175 Difference]: Start difference. First operand has 105 places, 81 transitions, 529 flow. Second operand 4 states and 124 transitions. [2024-11-20 17:47:42,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 119 transitions, 1021 flow [2024-11-20 17:47:42,715 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 119 transitions, 975 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-11-20 17:47:42,718 INFO L231 Difference]: Finished difference. Result has 104 places, 79 transitions, 503 flow [2024-11-20 17:47:42,718 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=503, PETRI_PLACES=104, PETRI_TRANSITIONS=79} [2024-11-20 17:47:42,719 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 46 predicate places. [2024-11-20 17:47:42,719 INFO L471 AbstractCegarLoop]: Abstraction has has 104 places, 79 transitions, 503 flow [2024-11-20 17:47:42,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-20 17:47:42,719 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:42,720 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] [2024-11-20 17:47:42,720 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-20 17:47:42,720 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:47:42,720 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:42,721 INFO L85 PathProgramCache]: Analyzing trace with hash 2133621176, now seen corresponding path program 1 times [2024-11-20 17:47:42,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:42,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309289505] [2024-11-20 17:47:42,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:42,721 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:42,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:43,521 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:47:43,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:43,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309289505] [2024-11-20 17:47:43,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309289505] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:43,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860021189] [2024-11-20 17:47:43,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:43,523 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:43,523 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:43,525 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) [2024-11-20 17:47:43,527 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-20 17:47:43,618 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:43,620 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 42 conjuncts are in the unsatisfiable core [2024-11-20 17:47:43,622 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:43,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 17:47:44,002 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-20 17:47:44,098 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:44,098 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:44,277 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 79 treesize of output 77 [2024-11-20 17:47:44,291 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 77 treesize of output 75 [2024-11-20 17:47:45,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 169 treesize of output 157 [2024-11-20 17:47:45,237 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:47:45,237 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 202 treesize of output 218 [2024-11-20 17:47:50,200 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:50,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [860021189] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:47:50,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:47:50,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-11-20 17:47:50,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212093276] [2024-11-20 17:47:50,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:47:50,201 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-20 17:47:50,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:47:50,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-20 17:47:50,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=734, Unknown=0, NotChecked=0, Total=812 [2024-11-20 17:47:51,622 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 58 [2024-11-20 17:47:51,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 79 transitions, 503 flow. Second operand has 29 states, 29 states have (on average 20.689655172413794) internal successors, (600), 29 states have internal predecessors, (600), 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) [2024-11-20 17:47:51,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:47:51,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 58 [2024-11-20 17:47:51,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:47:56,366 INFO L124 PetriNetUnfolderBase]: 21804/30986 cut-off events. [2024-11-20 17:47:56,366 INFO L125 PetriNetUnfolderBase]: For 90273/91472 co-relation queries the response was YES. [2024-11-20 17:47:56,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 105960 conditions, 30986 events. 21804/30986 cut-off events. For 90273/91472 co-relation queries the response was YES. Maximal size of possible extension queue 734. Compared 179148 event pairs, 1979 based on Foata normal form. 4/29878 useless extension candidates. Maximal degree in co-relation 84275. Up to 17500 conditions per place. [2024-11-20 17:47:56,638 INFO L140 encePairwiseOnDemand]: 42/58 looper letters, 314 selfloop transitions, 106 changer transitions 47/475 dead transitions. [2024-11-20 17:47:56,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 475 transitions, 3613 flow [2024-11-20 17:47:56,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2024-11-20 17:47:56,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2024-11-20 17:47:56,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 975 transitions. [2024-11-20 17:47:56,641 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49442190669371194 [2024-11-20 17:47:56,641 INFO L175 Difference]: Start difference. First operand has 104 places, 79 transitions, 503 flow. Second operand 34 states and 975 transitions. [2024-11-20 17:47:56,641 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 475 transitions, 3613 flow [2024-11-20 17:47:56,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 134 places, 475 transitions, 3531 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-20 17:47:56,997 INFO L231 Difference]: Finished difference. Result has 149 places, 176 transitions, 1502 flow [2024-11-20 17:47:56,998 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=485, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=43, PETRI_DIFFERENCE_SUBTRAHEND_STATES=34, PETRI_FLOW=1502, PETRI_PLACES=149, PETRI_TRANSITIONS=176} [2024-11-20 17:47:56,998 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 91 predicate places. [2024-11-20 17:47:56,998 INFO L471 AbstractCegarLoop]: Abstraction has has 149 places, 176 transitions, 1502 flow [2024-11-20 17:47:56,999 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 20.689655172413794) internal successors, (600), 29 states have internal predecessors, (600), 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) [2024-11-20 17:47:56,999 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:47:56,999 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] [2024-11-20 17:47:57,006 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-20 17:47:57,199 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:57,199 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:47:57,200 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:47:57,200 INFO L85 PathProgramCache]: Analyzing trace with hash -639374484, now seen corresponding path program 2 times [2024-11-20 17:47:57,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:47:57,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1769475231] [2024-11-20 17:47:57,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:47:57,200 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:47:57,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:47:57,971 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-20 17:47:57,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:47:57,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1769475231] [2024-11-20 17:47:57,972 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1769475231] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:47:57,972 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56175962] [2024-11-20 17:47:57,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-20 17:47:57,972 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:47:57,972 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:47:57,973 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) [2024-11-20 17:47:57,974 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-20 17:47:58,050 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-20 17:47:58,050 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:47:58,051 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 39 conjuncts are in the unsatisfiable core [2024-11-20 17:47:58,053 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:47:58,105 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 17:47:58,437 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 47 [2024-11-20 17:47:58,440 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 38 treesize of output 36 [2024-11-20 17:47:58,443 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 36 treesize of output 34 [2024-11-20 17:47:58,484 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:47:58,484 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:47:58,550 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 79 treesize of output 77 [2024-11-20 17:47:58,554 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 77 treesize of output 75 [2024-11-20 17:47:59,496 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 183 treesize of output 169 [2024-11-20 17:47:59,523 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-20 17:47:59,523 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 222 treesize of output 232 [2024-11-20 17:48:07,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:48:07,876 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56175962] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:48:07,876 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:48:07,876 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 28 [2024-11-20 17:48:07,876 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1994260397] [2024-11-20 17:48:07,876 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:48:07,876 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-20 17:48:07,877 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:48:07,877 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-20 17:48:07,877 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=725, Unknown=0, NotChecked=0, Total=812 [2024-11-20 17:48:09,437 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 58 [2024-11-20 17:48:09,438 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 149 places, 176 transitions, 1502 flow. Second operand has 29 states, 29 states have (on average 20.689655172413794) internal successors, (600), 29 states have internal predecessors, (600), 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) [2024-11-20 17:48:09,438 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:48:09,438 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 58 [2024-11-20 17:48:09,438 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-20 17:48:16,686 INFO L124 PetriNetUnfolderBase]: 27937/39216 cut-off events. [2024-11-20 17:48:16,686 INFO L125 PetriNetUnfolderBase]: For 145400/147454 co-relation queries the response was YES. [2024-11-20 17:48:16,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 149960 conditions, 39216 events. 27937/39216 cut-off events. For 145400/147454 co-relation queries the response was YES. Maximal size of possible extension queue 952. Compared 230153 event pairs, 2888 based on Foata normal form. 3/37917 useless extension candidates. Maximal degree in co-relation 149905. Up to 27149 conditions per place. [2024-11-20 17:48:17,166 INFO L140 encePairwiseOnDemand]: 41/58 looper letters, 361 selfloop transitions, 200 changer transitions 25/594 dead transitions. [2024-11-20 17:48:17,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 180 places, 594 transitions, 5454 flow [2024-11-20 17:48:17,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-20 17:48:17,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-20 17:48:17,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 1068 transitions. [2024-11-20 17:48:17,169 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47214854111405835 [2024-11-20 17:48:17,169 INFO L175 Difference]: Start difference. First operand has 149 places, 176 transitions, 1502 flow. Second operand 39 states and 1068 transitions. [2024-11-20 17:48:17,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 180 places, 594 transitions, 5454 flow [2024-11-20 17:48:17,973 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 594 transitions, 5374 flow, removed 32 selfloop flow, removed 9 redundant places. [2024-11-20 17:48:17,979 INFO L231 Difference]: Finished difference. Result has 188 places, 330 transitions, 3603 flow [2024-11-20 17:48:17,979 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=58, PETRI_DIFFERENCE_MINUEND_FLOW=1464, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=176, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=62, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=3603, PETRI_PLACES=188, PETRI_TRANSITIONS=330} [2024-11-20 17:48:17,979 INFO L277 CegarLoopForPetriNet]: 58 programPoint places, 130 predicate places. [2024-11-20 17:48:17,979 INFO L471 AbstractCegarLoop]: Abstraction has has 188 places, 330 transitions, 3603 flow [2024-11-20 17:48:17,980 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 20.689655172413794) internal successors, (600), 29 states have internal predecessors, (600), 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) [2024-11-20 17:48:17,980 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-20 17:48:17,980 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] [2024-11-20 17:48:17,987 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-20 17:48:18,180 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:18,181 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 32 more)] === [2024-11-20 17:48:18,181 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-20 17:48:18,181 INFO L85 PathProgramCache]: Analyzing trace with hash -1900677416, now seen corresponding path program 3 times [2024-11-20 17:48:18,181 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-20 17:48:18,181 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545619245] [2024-11-20 17:48:18,182 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-20 17:48:18,182 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-20 17:48:18,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-20 17:48:18,820 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:48:18,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-20 17:48:18,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545619245] [2024-11-20 17:48:18,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1545619245] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-20 17:48:18,821 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158951627] [2024-11-20 17:48:18,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-20 17:48:18,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-20 17:48:18,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-20 17:48:18,824 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) [2024-11-20 17:48:18,826 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-20 17:48:18,911 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-20 17:48:18,911 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-20 17:48:18,912 INFO L255 TraceCheckSpWp]: Trace formula consists of 221 conjuncts, 37 conjuncts are in the unsatisfiable core [2024-11-20 17:48:18,914 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-20 17:48:18,957 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 1 [2024-11-20 17:48:19,367 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 67 treesize of output 47 [2024-11-20 17:48:19,371 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 38 treesize of output 36 [2024-11-20 17:48:19,375 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 36 treesize of output 34 [2024-11-20 17:48:19,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:48:19,421 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-20 17:48:19,490 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 79 treesize of output 77 [2024-11-20 17:48:19,494 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 77 treesize of output 75 [2024-11-20 17:48:20,250 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 108 treesize of output 96 [2024-11-20 17:48:20,253 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 144 treesize of output 132 [2024-11-20 17:48:20,373 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-20 17:48:20,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158951627] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-20 17:48:20,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-20 17:48:20,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 30 [2024-11-20 17:48:20,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110174398] [2024-11-20 17:48:20,373 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-20 17:48:20,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 31 states [2024-11-20 17:48:20,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-20 17:48:20,374 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 31 interpolants. [2024-11-20 17:48:20,374 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=814, Unknown=0, NotChecked=0, Total=930 [2024-11-20 17:48:21,984 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 58 [2024-11-20 17:48:21,985 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 188 places, 330 transitions, 3603 flow. Second operand has 31 states, 31 states have (on average 20.516129032258064) internal successors, (636), 31 states have internal predecessors, (636), 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) [2024-11-20 17:48:21,985 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-20 17:48:21,985 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 58 [2024-11-20 17:48:21,985 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand