./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/unroll-3.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 803cd42f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/unroll-3.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 a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-803cd42-m [2024-11-22 21:53:11,771 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-22 21:53:11,822 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-22 21:53:11,827 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-22 21:53:11,828 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-22 21:53:11,847 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-22 21:53:11,848 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-22 21:53:11,848 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-22 21:53:11,849 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-22 21:53:11,851 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-22 21:53:11,852 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-22 21:53:11,852 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-22 21:53:11,852 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-22 21:53:11,853 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-22 21:53:11,854 INFO L153 SettingsManager]: * Use SBE=true [2024-11-22 21:53:11,854 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-22 21:53:11,854 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-22 21:53:11,854 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-22 21:53:11,854 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-22 21:53:11,855 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-22 21:53:11,855 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-22 21:53:11,855 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-22 21:53:11,855 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-22 21:53:11,856 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-22 21:53:11,856 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-22 21:53:11,856 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-22 21:53:11,856 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-22 21:53:11,856 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-22 21:53:11,857 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-22 21:53:11,857 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-22 21:53:11,858 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-22 21:53:11,858 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-22 21:53:11,858 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-22 21:53:11,859 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:53:11,859 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-22 21:53:11,859 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-22 21:53:11,859 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-22 21:53:11,860 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-22 21:53:11,860 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-22 21:53:11,860 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-22 21:53:11,860 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-22 21:53:11,860 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-22 21:53:11,860 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> a4cca88acec68e5dbb90cd5700ef248bb5273dc097847f9475a683bfbdc7b189 [2024-11-22 21:53:12,083 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-22 21:53:12,101 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-22 21:53:12,103 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-22 21:53:12,106 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-22 21:53:12,106 INFO L274 PluginConnector]: CDTParser initialized [2024-11-22 21:53:12,107 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-11-22 21:53:13,258 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-22 21:53:13,413 INFO L384 CDTParser]: Found 1 translation units. [2024-11-22 21:53:13,413 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/unroll-3.wvr.c [2024-11-22 21:53:13,419 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e0e3aed4/69bc82c03eaa4b3d9bdfa4c3824fb57a/FLAG0557f83a4 [2024-11-22 21:53:13,822 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8e0e3aed4/69bc82c03eaa4b3d9bdfa4c3824fb57a [2024-11-22 21:53:13,824 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-22 21:53:13,825 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-22 21:53:13,827 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-22 21:53:13,827 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-22 21:53:13,831 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-22 21:53:13,832 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:53:13" (1/1) ... [2024-11-22 21:53:13,833 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@306d85e4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:13, skipping insertion in model container [2024-11-22 21:53:13,834 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.11 09:53:13" (1/1) ... [2024-11-22 21:53:13,850 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-22 21:53:14,033 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-22 21:53:14,039 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:53:14,045 INFO L200 MainTranslator]: Completed pre-run [2024-11-22 21:53:14,066 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-22 21:53:14,079 INFO L204 MainTranslator]: Completed translation [2024-11-22 21:53:14,080 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:14 WrapperNode [2024-11-22 21:53:14,080 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-22 21:53:14,081 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-22 21:53:14,081 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-22 21:53:14,081 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-22 21:53:14,086 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:14" (1/1) ... [2024-11-22 21:53:14,091 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:14" (1/1) ... [2024-11-22 21:53:14,110 INFO L138 Inliner]: procedures = 23, calls = 25, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 139 [2024-11-22 21:53:14,111 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-22 21:53:14,111 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-22 21:53:14,111 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-22 21:53:14,111 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-22 21:53:14,120 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:14" (1/1) ... [2024-11-22 21:53:14,120 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:14" (1/1) ... [2024-11-22 21:53:14,122 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:14" (1/1) ... [2024-11-22 21:53:14,132 INFO L175 MemorySlicer]: Split 7 memory accesses to 2 slices as follows [2, 5]. 71 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]. [2024-11-22 21:53:14,132 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:14" (1/1) ... [2024-11-22 21:53:14,133 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:14" (1/1) ... [2024-11-22 21:53:14,137 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:14" (1/1) ... [2024-11-22 21:53:14,143 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:14" (1/1) ... [2024-11-22 21:53:14,144 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:14" (1/1) ... [2024-11-22 21:53:14,145 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:14" (1/1) ... [2024-11-22 21:53:14,147 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-22 21:53:14,149 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-22 21:53:14,150 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-22 21:53:14,150 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-22 21:53:14,150 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:14" (1/1) ... [2024-11-22 21:53:14,154 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-22 21:53:14,162 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:14,174 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-22 21:53:14,175 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-22 21:53:14,207 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-22 21:53:14,207 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-22 21:53:14,207 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-22 21:53:14,207 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-22 21:53:14,207 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-22 21:53:14,207 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-22 21:53:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-22 21:53:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-22 21:53:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-22 21:53:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-22 21:53:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-22 21:53:14,208 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-22 21:53:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-22 21:53:14,208 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-22 21:53:14,209 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-22 21:53:14,281 INFO L238 CfgBuilder]: Building ICFG [2024-11-22 21:53:14,282 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-22 21:53:14,538 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-22 21:53:14,539 INFO L287 CfgBuilder]: Performing block encoding [2024-11-22 21:53:14,703 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-22 21:53:14,703 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-22 21:53:14,704 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:53:14 BoogieIcfgContainer [2024-11-22 21:53:14,704 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-22 21:53:14,706 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-22 21:53:14,706 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-22 21:53:14,709 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-22 21:53:14,709 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.11 09:53:13" (1/3) ... [2024-11-22 21:53:14,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73194c39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:53:14, skipping insertion in model container [2024-11-22 21:53:14,710 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.11 09:53:14" (2/3) ... [2024-11-22 21:53:14,710 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@73194c39 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.11 09:53:14, skipping insertion in model container [2024-11-22 21:53:14,711 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.11 09:53:14" (3/3) ... [2024-11-22 21:53:14,712 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-3.wvr.c [2024-11-22 21:53:14,726 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-22 21:53:14,726 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 12 error locations. [2024-11-22 21:53:14,726 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-22 21:53:14,769 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-11-22 21:53:14,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 41 places, 37 transitions, 88 flow [2024-11-22 21:53:14,824 INFO L124 PetriNetUnfolderBase]: 3/35 cut-off events. [2024-11-22 21:53:14,824 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-11-22 21:53:14,827 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44 conditions, 35 events. 3/35 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 56 event pairs, 0 based on Foata normal form. 0/20 useless extension candidates. Maximal degree in co-relation 23. Up to 2 conditions per place. [2024-11-22 21:53:14,828 INFO L82 GeneralOperation]: Start removeDead. Operand has 41 places, 37 transitions, 88 flow [2024-11-22 21:53:14,831 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 38 places, 34 transitions, 80 flow [2024-11-22 21:53:14,839 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-22 21:53:14,844 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;@219c4964, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-22 21:53:14,844 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-11-22 21:53:14,847 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-22 21:53:14,847 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-22 21:53:14,847 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-22 21:53:14,847 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:14,848 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:53:14,848 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:14,852 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:14,852 INFO L85 PathProgramCache]: Analyzing trace with hash 478632, now seen corresponding path program 1 times [2024-11-22 21:53:14,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:14,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772444390] [2024-11-22 21:53:14,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:14,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:14,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:15,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:15,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:15,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772444390] [2024-11-22 21:53:15,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772444390] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:15,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:15,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-22 21:53:15,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [960695491] [2024-11-22 21:53:15,065 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:15,071 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:53:15,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:15,094 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:53:15,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:53:15,114 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-22 21:53:15,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 38 places, 34 transitions, 80 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:15,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:15,117 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-22 21:53:15,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:15,195 INFO L124 PetriNetUnfolderBase]: 88/211 cut-off events. [2024-11-22 21:53:15,195 INFO L125 PetriNetUnfolderBase]: For 17/17 co-relation queries the response was YES. [2024-11-22 21:53:15,196 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 211 events. 88/211 cut-off events. For 17/17 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 878 event pairs, 64 based on Foata normal form. 1/161 useless extension candidates. Maximal degree in co-relation 332. Up to 153 conditions per place. [2024-11-22 21:53:15,198 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 19 selfloop transitions, 2 changer transitions 0/31 dead transitions. [2024-11-22 21:53:15,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 31 transitions, 116 flow [2024-11-22 21:53:15,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:53:15,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:53:15,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 62 transitions. [2024-11-22 21:53:15,207 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5585585585585585 [2024-11-22 21:53:15,208 INFO L175 Difference]: Start difference. First operand has 38 places, 34 transitions, 80 flow. Second operand 3 states and 62 transitions. [2024-11-22 21:53:15,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 31 transitions, 116 flow [2024-11-22 21:53:15,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 108 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:53:15,213 INFO L231 Difference]: Finished difference. Result has 33 places, 31 transitions, 70 flow [2024-11-22 21:53:15,215 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=70, PETRI_PLACES=33, PETRI_TRANSITIONS=31} [2024-11-22 21:53:15,217 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2024-11-22 21:53:15,217 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 31 transitions, 70 flow [2024-11-22 21:53:15,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:15,218 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:15,218 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-22 21:53:15,218 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-22 21:53:15,218 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:15,220 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:15,220 INFO L85 PathProgramCache]: Analyzing trace with hash 478633, now seen corresponding path program 1 times [2024-11-22 21:53:15,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:15,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580786386] [2024-11-22 21:53:15,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:15,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:15,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:15,469 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:15,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:15,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580786386] [2024-11-22 21:53:15,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [580786386] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:15,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:15,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:53:15,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1657384436] [2024-11-22 21:53:15,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:15,471 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:53:15,472 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:15,473 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:53:15,473 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:53:15,494 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-22 21:53:15,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 31 transitions, 70 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:15,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:15,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-22 21:53:15,496 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:15,603 INFO L124 PetriNetUnfolderBase]: 89/214 cut-off events. [2024-11-22 21:53:15,603 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-22 21:53:15,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 384 conditions, 214 events. 89/214 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 887 event pairs, 64 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 362. Up to 158 conditions per place. [2024-11-22 21:53:15,605 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 22 selfloop transitions, 3 changer transitions 0/34 dead transitions. [2024-11-22 21:53:15,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 34 transitions, 128 flow [2024-11-22 21:53:15,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:53:15,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:53:15,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 65 transitions. [2024-11-22 21:53:15,607 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5855855855855856 [2024-11-22 21:53:15,608 INFO L175 Difference]: Start difference. First operand has 33 places, 31 transitions, 70 flow. Second operand 3 states and 65 transitions. [2024-11-22 21:53:15,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 34 transitions, 128 flow [2024-11-22 21:53:15,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 34 transitions, 122 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:53:15,611 INFO L231 Difference]: Finished difference. Result has 34 places, 33 transitions, 85 flow [2024-11-22 21:53:15,611 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=66, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=85, PETRI_PLACES=34, PETRI_TRANSITIONS=33} [2024-11-22 21:53:15,612 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -4 predicate places. [2024-11-22 21:53:15,612 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 33 transitions, 85 flow [2024-11-22 21:53:15,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:15,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:15,612 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-22 21:53:15,612 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-22 21:53:15,613 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:15,614 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:15,614 INFO L85 PathProgramCache]: Analyzing trace with hash 459981744, now seen corresponding path program 1 times [2024-11-22 21:53:15,614 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:15,614 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870834237] [2024-11-22 21:53:15,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:15,615 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:15,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:15,823 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:15,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:15,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870834237] [2024-11-22 21:53:15,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [870834237] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:15,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1411557207] [2024-11-22 21:53:15,825 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:15,825 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:15,825 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:15,827 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:53:15,829 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-22 21:53:15,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:15,880 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 21:53:15,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:15,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-22 21:53:16,065 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:16,066 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:16,180 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:16,182 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1411557207] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:16,182 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:16,182 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:53:16,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457809152] [2024-11-22 21:53:16,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:16,183 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:53:16,183 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:16,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:53:16,184 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:53:16,313 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-22 21:53:16,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 33 transitions, 85 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:16,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:16,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-22 21:53:16,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:16,499 INFO L124 PetriNetUnfolderBase]: 89/213 cut-off events. [2024-11-22 21:53:16,499 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-22 21:53:16,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 387 conditions, 213 events. 89/213 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 26. Compared 882 event pairs, 64 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 362. Up to 154 conditions per place. [2024-11-22 21:53:16,502 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 18 selfloop transitions, 6 changer transitions 0/33 dead transitions. [2024-11-22 21:53:16,502 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 33 transitions, 131 flow [2024-11-22 21:53:16,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:16,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:16,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 90 transitions. [2024-11-22 21:53:16,505 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4864864864864865 [2024-11-22 21:53:16,505 INFO L175 Difference]: Start difference. First operand has 34 places, 33 transitions, 85 flow. Second operand 5 states and 90 transitions. [2024-11-22 21:53:16,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 33 transitions, 131 flow [2024-11-22 21:53:16,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 33 transitions, 128 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:53:16,507 INFO L231 Difference]: Finished difference. Result has 37 places, 33 transitions, 98 flow [2024-11-22 21:53:16,507 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=98, PETRI_PLACES=37, PETRI_TRANSITIONS=33} [2024-11-22 21:53:16,508 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -1 predicate places. [2024-11-22 21:53:16,509 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 33 transitions, 98 flow [2024-11-22 21:53:16,509 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:16,509 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:16,509 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 21:53:16,518 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-22 21:53:16,710 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:16,710 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:16,710 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:16,710 INFO L85 PathProgramCache]: Analyzing trace with hash 1376829362, now seen corresponding path program 1 times [2024-11-22 21:53:16,711 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:16,711 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1557164088] [2024-11-22 21:53:16,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:16,711 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:16,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:16,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:16,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:16,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1557164088] [2024-11-22 21:53:16,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1557164088] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:16,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:16,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:53:16,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909597451] [2024-11-22 21:53:16,776 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:16,776 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:53:16,776 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:16,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:53:16,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:53:16,794 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 37 [2024-11-22 21:53:16,794 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 33 transitions, 98 flow. Second operand has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:16,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:16,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 37 [2024-11-22 21:53:16,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:16,848 INFO L124 PetriNetUnfolderBase]: 89/186 cut-off events. [2024-11-22 21:53:16,848 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-22 21:53:16,849 INFO L83 FinitePrefix]: Finished finitePrefix Result has 368 conditions, 186 events. 89/186 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 626 event pairs, 64 based on Foata normal form. 0/163 useless extension candidates. Maximal degree in co-relation 343. Up to 153 conditions per place. [2024-11-22 21:53:16,850 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 21 selfloop transitions, 3 changer transitions 0/29 dead transitions. [2024-11-22 21:53:16,850 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 29 transitions, 138 flow [2024-11-22 21:53:16,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:53:16,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:53:16,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 61 transitions. [2024-11-22 21:53:16,852 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41216216216216217 [2024-11-22 21:53:16,852 INFO L175 Difference]: Start difference. First operand has 37 places, 33 transitions, 98 flow. Second operand 4 states and 61 transitions. [2024-11-22 21:53:16,852 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 29 transitions, 138 flow [2024-11-22 21:53:16,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 29 transitions, 125 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-11-22 21:53:16,853 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 83 flow [2024-11-22 21:53:16,853 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=77, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=83, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2024-11-22 21:53:16,853 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2024-11-22 21:53:16,854 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 83 flow [2024-11-22 21:53:16,854 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.5) internal successors, (42), 4 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:16,854 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:16,854 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-22 21:53:16,854 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-22 21:53:16,854 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:16,856 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:16,856 INFO L85 PathProgramCache]: Analyzing trace with hash 1376829363, now seen corresponding path program 1 times [2024-11-22 21:53:16,856 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:16,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705246124] [2024-11-22 21:53:16,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:16,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:16,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:16,894 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:16,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:16,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705246124] [2024-11-22 21:53:16,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705246124] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:16,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:16,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:53:16,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064167643] [2024-11-22 21:53:16,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:16,895 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:53:16,895 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:16,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:53:16,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:53:16,898 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-22 21:53:16,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 83 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:16,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:16,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-22 21:53:16,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:16,937 INFO L124 PetriNetUnfolderBase]: 88/185 cut-off events. [2024-11-22 21:53:16,937 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-22 21:53:16,938 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 185 events. 88/185 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 616 event pairs, 64 based on Foata normal form. 1/163 useless extension candidates. Maximal degree in co-relation 335. Up to 156 conditions per place. [2024-11-22 21:53:16,938 INFO L140 encePairwiseOnDemand]: 34/37 looper letters, 21 selfloop transitions, 2 changer transitions 0/28 dead transitions. [2024-11-22 21:53:16,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 28 transitions, 124 flow [2024-11-22 21:53:16,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:53:16,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:53:16,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 66 transitions. [2024-11-22 21:53:16,940 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5945945945945946 [2024-11-22 21:53:16,940 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 83 flow. Second operand 3 states and 66 transitions. [2024-11-22 21:53:16,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 28 transitions, 124 flow [2024-11-22 21:53:16,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 28 transitions, 121 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:53:16,941 INFO L231 Difference]: Finished difference. Result has 33 places, 28 transitions, 79 flow [2024-11-22 21:53:16,941 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=79, PETRI_PLACES=33, PETRI_TRANSITIONS=28} [2024-11-22 21:53:16,941 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -5 predicate places. [2024-11-22 21:53:16,941 INFO L471 AbstractCegarLoop]: Abstraction has has 33 places, 28 transitions, 79 flow [2024-11-22 21:53:16,942 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:16,942 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:16,942 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:16,943 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-22 21:53:16,943 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:16,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:16,943 INFO L85 PathProgramCache]: Analyzing trace with hash -1921730484, now seen corresponding path program 1 times [2024-11-22 21:53:16,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:16,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412891141] [2024-11-22 21:53:16,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:16,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:16,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:17,094 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:17,095 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:17,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412891141] [2024-11-22 21:53:17,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1412891141] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:17,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122945181] [2024-11-22 21:53:17,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:17,095 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:17,095 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:17,098 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:53:17,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-22 21:53:17,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:17,153 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:53:17,154 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:17,229 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:17,230 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:17,276 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 29 treesize of output 25 [2024-11-22 21:53:17,296 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:17,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2122945181] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:17,297 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:17,297 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:53:17,297 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186678951] [2024-11-22 21:53:17,297 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:17,297 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:53:17,297 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:17,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:53:17,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:53:17,425 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-22 21:53:17,425 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 28 transitions, 79 flow. Second operand has 11 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:17,425 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:17,425 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-22 21:53:17,425 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:17,567 INFO L124 PetriNetUnfolderBase]: 174/334 cut-off events. [2024-11-22 21:53:17,567 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2024-11-22 21:53:17,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 334 events. 174/334 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 31. Compared 1355 event pairs, 64 based on Foata normal form. 0/273 useless extension candidates. Maximal degree in co-relation 649. Up to 165 conditions per place. [2024-11-22 21:53:17,568 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 35 selfloop transitions, 4 changer transitions 0/43 dead transitions. [2024-11-22 21:53:17,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 43 transitions, 190 flow [2024-11-22 21:53:17,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:17,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:17,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 105 transitions. [2024-11-22 21:53:17,571 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5675675675675675 [2024-11-22 21:53:17,572 INFO L175 Difference]: Start difference. First operand has 33 places, 28 transitions, 79 flow. Second operand 5 states and 105 transitions. [2024-11-22 21:53:17,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 43 transitions, 190 flow [2024-11-22 21:53:17,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 43 transitions, 186 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-22 21:53:17,573 INFO L231 Difference]: Finished difference. Result has 36 places, 29 transitions, 91 flow [2024-11-22 21:53:17,573 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=75, PETRI_DIFFERENCE_MINUEND_PLACES=31, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=91, PETRI_PLACES=36, PETRI_TRANSITIONS=29} [2024-11-22 21:53:17,573 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, -2 predicate places. [2024-11-22 21:53:17,573 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 29 transitions, 91 flow [2024-11-22 21:53:17,574 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.181818181818182) internal successors, (167), 11 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:17,574 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:17,574 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:17,581 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-22 21:53:17,774 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 [2024-11-22 21:53:17,774 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:17,775 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:17,775 INFO L85 PathProgramCache]: Analyzing trace with hash 52957712, now seen corresponding path program 1 times [2024-11-22 21:53:17,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:17,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532688848] [2024-11-22 21:53:17,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:17,775 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:17,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:17,934 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:17,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:17,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532688848] [2024-11-22 21:53:17,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532688848] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:17,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1466926961] [2024-11-22 21:53:17,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:17,935 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:17,935 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:17,937 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:53:17,938 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-22 21:53:17,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:17,983 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 21:53:17,985 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:18,090 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:18,160 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 32 [2024-11-22 21:53:18,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:18,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1466926961] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:18,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:18,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-22 21:53:18,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390465407] [2024-11-22 21:53:18,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:18,294 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:53:18,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:18,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:53:18,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:53:18,571 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-22 21:53:18,571 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 29 transitions, 91 flow. Second operand has 17 states, 17 states have (on average 14.764705882352942) internal successors, (251), 17 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:18,572 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:18,572 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-22 21:53:18,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:18,895 INFO L124 PetriNetUnfolderBase]: 366/744 cut-off events. [2024-11-22 21:53:18,895 INFO L125 PetriNetUnfolderBase]: For 62/62 co-relation queries the response was YES. [2024-11-22 21:53:18,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1538 conditions, 744 events. 366/744 cut-off events. For 62/62 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 3824 event pairs, 189 based on Foata normal form. 0/625 useless extension candidates. Maximal degree in co-relation 781. Up to 305 conditions per place. [2024-11-22 21:53:18,898 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 63 selfloop transitions, 11 changer transitions 0/78 dead transitions. [2024-11-22 21:53:18,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 78 transitions, 367 flow [2024-11-22 21:53:18,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-22 21:53:18,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-22 21:53:18,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-11-22 21:53:18,899 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.597972972972973 [2024-11-22 21:53:18,899 INFO L175 Difference]: Start difference. First operand has 36 places, 29 transitions, 91 flow. Second operand 8 states and 177 transitions. [2024-11-22 21:53:18,899 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 78 transitions, 367 flow [2024-11-22 21:53:18,900 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 40 places, 78 transitions, 358 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-22 21:53:18,901 INFO L231 Difference]: Finished difference. Result has 45 places, 37 transitions, 172 flow [2024-11-22 21:53:18,901 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=85, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=172, PETRI_PLACES=45, PETRI_TRANSITIONS=37} [2024-11-22 21:53:18,901 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 7 predicate places. [2024-11-22 21:53:18,901 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 37 transitions, 172 flow [2024-11-22 21:53:18,902 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 14.764705882352942) internal successors, (251), 17 states have internal predecessors, (251), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:18,902 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:18,902 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:18,909 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2024-11-22 21:53:19,106 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 [2024-11-22 21:53:19,107 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:19,107 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:19,108 INFO L85 PathProgramCache]: Analyzing trace with hash 30466660, now seen corresponding path program 1 times [2024-11-22 21:53:19,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:19,108 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654657091] [2024-11-22 21:53:19,108 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:19,108 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:19,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:19,207 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:19,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:19,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654657091] [2024-11-22 21:53:19,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654657091] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:19,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705944563] [2024-11-22 21:53:19,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:19,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:19,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:19,211 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:53:19,214 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-22 21:53:19,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:19,261 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-22 21:53:19,261 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:19,330 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:19,330 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:19,388 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 29 treesize of output 25 [2024-11-22 21:53:19,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:19,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [705944563] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:19,405 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:19,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:53:19,405 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857208519] [2024-11-22 21:53:19,405 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:19,405 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:53:19,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:19,406 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:53:19,406 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:53:19,494 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-22 21:53:19,495 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 37 transitions, 172 flow. Second operand has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:19,495 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:19,495 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-22 21:53:19,495 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:19,701 INFO L124 PetriNetUnfolderBase]: 583/1037 cut-off events. [2024-11-22 21:53:19,701 INFO L125 PetriNetUnfolderBase]: For 615/663 co-relation queries the response was YES. [2024-11-22 21:53:19,703 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2591 conditions, 1037 events. 583/1037 cut-off events. For 615/663 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 4739 event pairs, 162 based on Foata normal form. 32/941 useless extension candidates. Maximal degree in co-relation 1667. Up to 665 conditions per place. [2024-11-22 21:53:19,707 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 43 selfloop transitions, 6 changer transitions 0/51 dead transitions. [2024-11-22 21:53:19,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 51 transitions, 322 flow [2024-11-22 21:53:19,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:19,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:19,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 93 transitions. [2024-11-22 21:53:19,708 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5027027027027027 [2024-11-22 21:53:19,708 INFO L175 Difference]: Start difference. First operand has 45 places, 37 transitions, 172 flow. Second operand 5 states and 93 transitions. [2024-11-22 21:53:19,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 51 transitions, 322 flow [2024-11-22 21:53:19,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 51 transitions, 320 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:53:19,712 INFO L231 Difference]: Finished difference. Result has 49 places, 38 transitions, 194 flow [2024-11-22 21:53:19,712 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=49, PETRI_TRANSITIONS=38} [2024-11-22 21:53:19,715 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 11 predicate places. [2024-11-22 21:53:19,715 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 38 transitions, 194 flow [2024-11-22 21:53:19,715 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 13.727272727272727) internal successors, (151), 11 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:19,715 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:19,715 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:19,721 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-22 21:53:19,915 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 [2024-11-22 21:53:19,916 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:19,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:19,916 INFO L85 PathProgramCache]: Analyzing trace with hash 944466959, now seen corresponding path program 1 times [2024-11-22 21:53:19,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:19,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [639983853] [2024-11-22 21:53:19,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:19,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:19,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:20,053 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:20,053 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:20,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [639983853] [2024-11-22 21:53:20,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [639983853] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:20,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [37307239] [2024-11-22 21:53:20,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:20,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:20,054 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:20,056 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:53:20,057 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-22 21:53:20,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:20,101 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 21:53:20,102 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:20,191 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:20,191 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:20,215 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 29 treesize of output 25 [2024-11-22 21:53:20,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:20,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [37307239] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:20,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:20,350 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-11-22 21:53:20,350 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [900639710] [2024-11-22 21:53:20,350 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:20,350 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-22 21:53:20,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:20,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-22 21:53:20,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2024-11-22 21:53:20,479 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-22 21:53:20,479 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 38 transitions, 194 flow. Second operand has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:20,479 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:20,479 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-22 21:53:20,480 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:20,751 INFO L124 PetriNetUnfolderBase]: 629/1108 cut-off events. [2024-11-22 21:53:20,751 INFO L125 PetriNetUnfolderBase]: For 780/843 co-relation queries the response was YES. [2024-11-22 21:53:20,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2895 conditions, 1108 events. 629/1108 cut-off events. For 780/843 co-relation queries the response was YES. Maximal size of possible extension queue 58. Compared 5040 event pairs, 330 based on Foata normal form. 0/980 useless extension candidates. Maximal degree in co-relation 1794. Up to 841 conditions per place. [2024-11-22 21:53:20,757 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 53 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2024-11-22 21:53:20,758 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 64 transitions, 410 flow [2024-11-22 21:53:20,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:53:20,758 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:53:20,758 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2024-11-22 21:53:20,759 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5057915057915058 [2024-11-22 21:53:20,759 INFO L175 Difference]: Start difference. First operand has 49 places, 38 transitions, 194 flow. Second operand 7 states and 131 transitions. [2024-11-22 21:53:20,759 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 64 transitions, 410 flow [2024-11-22 21:53:20,761 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 64 transitions, 399 flow, removed 1 selfloop flow, removed 3 redundant places. [2024-11-22 21:53:20,763 INFO L231 Difference]: Finished difference. Result has 54 places, 40 transitions, 224 flow [2024-11-22 21:53:20,764 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=184, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=224, PETRI_PLACES=54, PETRI_TRANSITIONS=40} [2024-11-22 21:53:20,764 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 16 predicate places. [2024-11-22 21:53:20,765 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 40 transitions, 224 flow [2024-11-22 21:53:20,765 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.357142857142858) internal successors, (187), 14 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:20,765 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:20,765 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:20,772 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-22 21:53:20,966 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:20,966 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:20,966 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:20,966 INFO L85 PathProgramCache]: Analyzing trace with hash -2076436951, now seen corresponding path program 2 times [2024-11-22 21:53:20,967 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:20,967 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1270816245] [2024-11-22 21:53:20,967 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:20,967 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:20,980 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:20,980 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:21,060 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:53:21,060 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:21,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1270816245] [2024-11-22 21:53:21,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1270816245] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:21,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644747028] [2024-11-22 21:53:21,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:21,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:21,061 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:21,062 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:53:21,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-22 21:53:21,117 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:21,117 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:21,118 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-22 21:53:21,119 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:21,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-22 21:53:21,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:53:21,259 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:21,360 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:53:21,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [644747028] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:21,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:21,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:53:21,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979238381] [2024-11-22 21:53:21,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:21,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:53:21,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:21,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:53:21,362 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:53:21,566 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 37 [2024-11-22 21:53:21,566 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 40 transitions, 224 flow. Second operand has 11 states, 11 states have (on average 15.727272727272727) internal successors, (173), 11 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:21,566 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:21,566 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 37 [2024-11-22 21:53:21,566 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:21,759 INFO L124 PetriNetUnfolderBase]: 491/943 cut-off events. [2024-11-22 21:53:21,759 INFO L125 PetriNetUnfolderBase]: For 478/478 co-relation queries the response was YES. [2024-11-22 21:53:21,760 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2494 conditions, 943 events. 491/943 cut-off events. For 478/478 co-relation queries the response was YES. Maximal size of possible extension queue 54. Compared 4790 event pairs, 280 based on Foata normal form. 0/879 useless extension candidates. Maximal degree in co-relation 1588. Up to 640 conditions per place. [2024-11-22 21:53:21,763 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 38 selfloop transitions, 10 changer transitions 0/52 dead transitions. [2024-11-22 21:53:21,763 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 52 transitions, 372 flow [2024-11-22 21:53:21,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:21,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:21,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2024-11-22 21:53:21,764 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.518918918918919 [2024-11-22 21:53:21,764 INFO L175 Difference]: Start difference. First operand has 54 places, 40 transitions, 224 flow. Second operand 5 states and 96 transitions. [2024-11-22 21:53:21,764 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 52 transitions, 372 flow [2024-11-22 21:53:21,766 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 52 transitions, 355 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-22 21:53:21,767 INFO L231 Difference]: Finished difference. Result has 53 places, 39 transitions, 224 flow [2024-11-22 21:53:21,767 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=204, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=224, PETRI_PLACES=53, PETRI_TRANSITIONS=39} [2024-11-22 21:53:21,767 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 15 predicate places. [2024-11-22 21:53:21,767 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 39 transitions, 224 flow [2024-11-22 21:53:21,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 15.727272727272727) internal successors, (173), 11 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:21,767 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:21,768 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:21,777 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-22 21:53:21,971 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:21,972 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:21,972 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:21,972 INFO L85 PathProgramCache]: Analyzing trace with hash -642258154, now seen corresponding path program 2 times [2024-11-22 21:53:21,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:21,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625347280] [2024-11-22 21:53:21,972 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:21,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:21,988 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:21,988 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:22,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:53:22,133 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:22,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625347280] [2024-11-22 21:53:22,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [625347280] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:22,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:22,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-22 21:53:22,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [828368643] [2024-11-22 21:53:22,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:22,134 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:53:22,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:22,134 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:53:22,134 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:53:22,179 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-22 21:53:22,180 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 39 transitions, 224 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:22,180 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:22,180 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-22 21:53:22,180 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:22,307 INFO L124 PetriNetUnfolderBase]: 537/949 cut-off events. [2024-11-22 21:53:22,308 INFO L125 PetriNetUnfolderBase]: For 1174/1174 co-relation queries the response was YES. [2024-11-22 21:53:22,309 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2726 conditions, 949 events. 537/949 cut-off events. For 1174/1174 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4188 event pairs, 322 based on Foata normal form. 32/885 useless extension candidates. Maximal degree in co-relation 1672. Up to 684 conditions per place. [2024-11-22 21:53:22,312 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 37 selfloop transitions, 9 changer transitions 0/47 dead transitions. [2024-11-22 21:53:22,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 47 transitions, 367 flow [2024-11-22 21:53:22,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:22,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:22,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 85 transitions. [2024-11-22 21:53:22,313 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4594594594594595 [2024-11-22 21:53:22,313 INFO L175 Difference]: Start difference. First operand has 53 places, 39 transitions, 224 flow. Second operand 5 states and 85 transitions. [2024-11-22 21:53:22,313 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 47 transitions, 367 flow [2024-11-22 21:53:22,315 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 47 transitions, 335 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:53:22,316 INFO L231 Difference]: Finished difference. Result has 51 places, 37 transitions, 214 flow [2024-11-22 21:53:22,316 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=214, PETRI_PLACES=51, PETRI_TRANSITIONS=37} [2024-11-22 21:53:22,316 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 13 predicate places. [2024-11-22 21:53:22,316 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 37 transitions, 214 flow [2024-11-22 21:53:22,317 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:22,317 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:22,317 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:22,317 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-22 21:53:22,317 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:22,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:22,317 INFO L85 PathProgramCache]: Analyzing trace with hash 284917643, now seen corresponding path program 1 times [2024-11-22 21:53:22,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:22,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [398330168] [2024-11-22 21:53:22,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:22,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:22,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:22,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:22,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [398330168] [2024-11-22 21:53:22,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [398330168] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:22,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [134146386] [2024-11-22 21:53:22,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:22,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:22,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:22,453 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:53:22,459 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-22 21:53:22,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:22,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-22 21:53:22,514 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:22,620 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:22,620 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:22,676 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 32 [2024-11-22 21:53:22,792 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:22,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [134146386] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:22,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:22,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-11-22 21:53:22,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [544453411] [2024-11-22 21:53:22,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:22,793 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-22 21:53:22,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:22,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-22 21:53:22,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=226, Unknown=0, NotChecked=0, Total=272 [2024-11-22 21:53:23,019 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-22 21:53:23,019 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 37 transitions, 214 flow. Second operand has 17 states, 17 states have (on average 13.470588235294118) internal successors, (229), 17 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:23,019 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:23,019 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-22 21:53:23,019 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:23,289 INFO L124 PetriNetUnfolderBase]: 524/927 cut-off events. [2024-11-22 21:53:23,289 INFO L125 PetriNetUnfolderBase]: For 944/944 co-relation queries the response was YES. [2024-11-22 21:53:23,290 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2613 conditions, 927 events. 524/927 cut-off events. For 944/944 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 4059 event pairs, 249 based on Foata normal form. 16/879 useless extension candidates. Maximal degree in co-relation 1674. Up to 431 conditions per place. [2024-11-22 21:53:23,293 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 69 selfloop transitions, 13 changer transitions 0/83 dead transitions. [2024-11-22 21:53:23,294 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 83 transitions, 530 flow [2024-11-22 21:53:23,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:53:23,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:53:23,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 174 transitions. [2024-11-22 21:53:23,295 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5225225225225225 [2024-11-22 21:53:23,295 INFO L175 Difference]: Start difference. First operand has 51 places, 37 transitions, 214 flow. Second operand 9 states and 174 transitions. [2024-11-22 21:53:23,295 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 83 transitions, 530 flow [2024-11-22 21:53:23,297 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 83 transitions, 506 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:53:23,298 INFO L231 Difference]: Finished difference. Result has 58 places, 41 transitions, 262 flow [2024-11-22 21:53:23,299 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=196, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=262, PETRI_PLACES=58, PETRI_TRANSITIONS=41} [2024-11-22 21:53:23,299 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 20 predicate places. [2024-11-22 21:53:23,300 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 41 transitions, 262 flow [2024-11-22 21:53:23,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.470588235294118) internal successors, (229), 17 states have internal predecessors, (229), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:23,300 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:23,300 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:23,307 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-22 21:53:23,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:23,501 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:23,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:23,502 INFO L85 PathProgramCache]: Analyzing trace with hash 567136036, now seen corresponding path program 2 times [2024-11-22 21:53:23,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:23,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934225513] [2024-11-22 21:53:23,502 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:23,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:23,513 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:23,513 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:23,603 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:53:23,604 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:23,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934225513] [2024-11-22 21:53:23,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934225513] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:23,604 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081442493] [2024-11-22 21:53:23,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:23,604 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:23,604 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:23,606 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:53:23,607 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-22 21:53:23,660 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-22 21:53:23,661 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:23,662 INFO L255 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-22 21:53:23,663 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:23,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-22 21:53:23,852 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:53:23,852 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:23,979 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:53:23,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1081442493] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:23,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:23,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-22 21:53:23,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560518832] [2024-11-22 21:53:23,980 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:23,980 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-22 21:53:23,980 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:23,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-22 21:53:23,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2024-11-22 21:53:24,088 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 37 [2024-11-22 21:53:24,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 41 transitions, 262 flow. Second operand has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 11 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:24,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:24,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 37 [2024-11-22 21:53:24,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:24,253 INFO L124 PetriNetUnfolderBase]: 501/888 cut-off events. [2024-11-22 21:53:24,254 INFO L125 PetriNetUnfolderBase]: For 1164/1164 co-relation queries the response was YES. [2024-11-22 21:53:24,255 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2642 conditions, 888 events. 501/888 cut-off events. For 1164/1164 co-relation queries the response was YES. Maximal size of possible extension queue 45. Compared 3882 event pairs, 200 based on Foata normal form. 16/904 useless extension candidates. Maximal degree in co-relation 1669. Up to 450 conditions per place. [2024-11-22 21:53:24,257 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 41 selfloop transitions, 9 changer transitions 0/51 dead transitions. [2024-11-22 21:53:24,257 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 51 transitions, 414 flow [2024-11-22 21:53:24,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:24,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:24,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 83 transitions. [2024-11-22 21:53:24,258 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4486486486486487 [2024-11-22 21:53:24,258 INFO L175 Difference]: Start difference. First operand has 58 places, 41 transitions, 262 flow. Second operand 5 states and 83 transitions. [2024-11-22 21:53:24,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 51 transitions, 414 flow [2024-11-22 21:53:24,260 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 56 places, 51 transitions, 395 flow, removed 2 selfloop flow, removed 5 redundant places. [2024-11-22 21:53:24,261 INFO L231 Difference]: Finished difference. Result has 56 places, 40 transitions, 256 flow [2024-11-22 21:53:24,261 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=256, PETRI_PLACES=56, PETRI_TRANSITIONS=40} [2024-11-22 21:53:24,261 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 18 predicate places. [2024-11-22 21:53:24,261 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 40 transitions, 256 flow [2024-11-22 21:53:24,262 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.818181818181818) internal successors, (163), 11 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:24,262 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:24,262 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:24,268 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-22 21:53:24,465 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-22 21:53:24,465 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:24,466 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:24,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1955461207, now seen corresponding path program 1 times [2024-11-22 21:53:24,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:24,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579978113] [2024-11-22 21:53:24,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:24,466 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:24,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:24,502 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:24,502 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:24,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579978113] [2024-11-22 21:53:24,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1579978113] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:24,503 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:24,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-22 21:53:24,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795218152] [2024-11-22 21:53:24,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:24,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-22 21:53:24,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:24,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-22 21:53:24,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-22 21:53:24,509 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-22 21:53:24,509 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 40 transitions, 256 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:24,509 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:24,509 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-22 21:53:24,509 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:24,595 INFO L124 PetriNetUnfolderBase]: 501/884 cut-off events. [2024-11-22 21:53:24,595 INFO L125 PetriNetUnfolderBase]: For 1206/1206 co-relation queries the response was YES. [2024-11-22 21:53:24,597 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2722 conditions, 884 events. 501/884 cut-off events. For 1206/1206 co-relation queries the response was YES. Maximal size of possible extension queue 47. Compared 3812 event pairs, 149 based on Foata normal form. 2/886 useless extension candidates. Maximal degree in co-relation 1716. Up to 696 conditions per place. [2024-11-22 21:53:24,599 INFO L140 encePairwiseOnDemand]: 33/37 looper letters, 46 selfloop transitions, 5 changer transitions 1/53 dead transitions. [2024-11-22 21:53:24,599 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 53 transitions, 405 flow [2024-11-22 21:53:24,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-22 21:53:24,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-22 21:53:24,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 77 transitions. [2024-11-22 21:53:24,600 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6936936936936937 [2024-11-22 21:53:24,600 INFO L175 Difference]: Start difference. First operand has 56 places, 40 transitions, 256 flow. Second operand 3 states and 77 transitions. [2024-11-22 21:53:24,600 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 53 transitions, 405 flow [2024-11-22 21:53:24,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 53 transitions, 385 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-22 21:53:24,604 INFO L231 Difference]: Finished difference. Result has 55 places, 42 transitions, 271 flow [2024-11-22 21:53:24,604 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=271, PETRI_PLACES=55, PETRI_TRANSITIONS=42} [2024-11-22 21:53:24,605 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 17 predicate places. [2024-11-22 21:53:24,605 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 42 transitions, 271 flow [2024-11-22 21:53:24,605 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:24,605 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:24,605 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:24,605 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-22 21:53:24,605 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:24,605 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:24,605 INFO L85 PathProgramCache]: Analyzing trace with hash -1005648539, now seen corresponding path program 1 times [2024-11-22 21:53:24,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:24,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254438466] [2024-11-22 21:53:24,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:24,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:24,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:24,673 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:24,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:24,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254438466] [2024-11-22 21:53:24,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254438466] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:24,674 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:24,674 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:53:24,674 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [312662866] [2024-11-22 21:53:24,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:24,674 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:53:24,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:24,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:53:24,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:53:24,675 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-22 21:53:24,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 42 transitions, 271 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:24,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:24,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-22 21:53:24,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:24,812 INFO L124 PetriNetUnfolderBase]: 583/1050 cut-off events. [2024-11-22 21:53:24,812 INFO L125 PetriNetUnfolderBase]: For 1483/1483 co-relation queries the response was YES. [2024-11-22 21:53:24,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3265 conditions, 1050 events. 583/1050 cut-off events. For 1483/1483 co-relation queries the response was YES. Maximal size of possible extension queue 57. Compared 5212 event pairs, 193 based on Foata normal form. 32/1082 useless extension candidates. Maximal degree in co-relation 1999. Up to 517 conditions per place. [2024-11-22 21:53:24,817 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 71 selfloop transitions, 13 changer transitions 0/85 dead transitions. [2024-11-22 21:53:24,817 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 85 transitions, 675 flow [2024-11-22 21:53:24,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-22 21:53:24,817 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-22 21:53:24,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 125 transitions. [2024-11-22 21:53:24,818 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6756756756756757 [2024-11-22 21:53:24,818 INFO L175 Difference]: Start difference. First operand has 55 places, 42 transitions, 271 flow. Second operand 5 states and 125 transitions. [2024-11-22 21:53:24,818 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 85 transitions, 675 flow [2024-11-22 21:53:24,821 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 85 transitions, 662 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-22 21:53:24,822 INFO L231 Difference]: Finished difference. Result has 61 places, 50 transitions, 389 flow [2024-11-22 21:53:24,822 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=389, PETRI_PLACES=61, PETRI_TRANSITIONS=50} [2024-11-22 21:53:24,822 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 23 predicate places. [2024-11-22 21:53:24,822 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 50 transitions, 389 flow [2024-11-22 21:53:24,823 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:24,823 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:24,823 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:24,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-22 21:53:24,823 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:24,823 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:24,823 INFO L85 PathProgramCache]: Analyzing trace with hash 75908333, now seen corresponding path program 2 times [2024-11-22 21:53:24,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:24,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [45229827] [2024-11-22 21:53:24,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:24,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:24,834 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:53:24,835 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:25,064 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:25,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:25,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [45229827] [2024-11-22 21:53:25,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [45229827] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:25,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092876711] [2024-11-22 21:53:25,065 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:25,065 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:25,065 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:25,067 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:53:25,068 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-22 21:53:25,114 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:53:25,114 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:25,115 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:53:25,116 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:25,157 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:25,157 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:25,190 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:25,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2092876711] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:25,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-22 21:53:25,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [8, 5] total 12 [2024-11-22 21:53:25,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321490011] [2024-11-22 21:53:25,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:25,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:53:25,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:25,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:53:25,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:53:25,192 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-22 21:53:25,192 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 50 transitions, 389 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:25,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:25,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-22 21:53:25,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:25,301 INFO L124 PetriNetUnfolderBase]: 603/1084 cut-off events. [2024-11-22 21:53:25,301 INFO L125 PetriNetUnfolderBase]: For 2413/2413 co-relation queries the response was YES. [2024-11-22 21:53:25,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3944 conditions, 1084 events. 603/1084 cut-off events. For 2413/2413 co-relation queries the response was YES. Maximal size of possible extension queue 60. Compared 5177 event pairs, 115 based on Foata normal form. 14/1098 useless extension candidates. Maximal degree in co-relation 2498. Up to 703 conditions per place. [2024-11-22 21:53:25,306 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 57 selfloop transitions, 18 changer transitions 1/77 dead transitions. [2024-11-22 21:53:25,307 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 77 transitions, 707 flow [2024-11-22 21:53:25,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:53:25,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:53:25,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-22 21:53:25,308 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2024-11-22 21:53:25,308 INFO L175 Difference]: Start difference. First operand has 61 places, 50 transitions, 389 flow. Second operand 4 states and 96 transitions. [2024-11-22 21:53:25,308 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 77 transitions, 707 flow [2024-11-22 21:53:25,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 62 places, 77 transitions, 672 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-11-22 21:53:25,313 INFO L231 Difference]: Finished difference. Result has 65 places, 56 transitions, 492 flow [2024-11-22 21:53:25,313 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=492, PETRI_PLACES=65, PETRI_TRANSITIONS=56} [2024-11-22 21:53:25,314 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 27 predicate places. [2024-11-22 21:53:25,314 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 56 transitions, 492 flow [2024-11-22 21:53:25,314 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:25,314 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:25,314 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:25,320 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2024-11-22 21:53:25,514 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,SelfDestructingSolverStorable15 [2024-11-22 21:53:25,515 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:25,515 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:25,515 INFO L85 PathProgramCache]: Analyzing trace with hash 123274719, now seen corresponding path program 3 times [2024-11-22 21:53:25,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:25,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2134256672] [2024-11-22 21:53:25,515 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:53:25,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:25,527 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:53:25,527 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:25,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:25,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:25,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2134256672] [2024-11-22 21:53:25,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2134256672] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:25,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [853258602] [2024-11-22 21:53:25,669 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:53:25,670 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:25,670 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:25,671 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:53:25,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-22 21:53:25,718 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:53:25,719 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:25,719 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-22 21:53:25,720 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:26,066 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:26,066 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-22 21:53:26,066 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [853258602] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:26,066 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-22 21:53:26,066 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [8] total 10 [2024-11-22 21:53:26,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1682698151] [2024-11-22 21:53:26,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:26,066 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:53:26,067 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:26,067 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:53:26,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2024-11-22 21:53:26,067 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-22 21:53:26,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 56 transitions, 492 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:26,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:26,067 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-22 21:53:26,067 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:26,399 INFO L124 PetriNetUnfolderBase]: 605/1076 cut-off events. [2024-11-22 21:53:26,399 INFO L125 PetriNetUnfolderBase]: For 3507/3507 co-relation queries the response was YES. [2024-11-22 21:53:26,401 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4389 conditions, 1076 events. 605/1076 cut-off events. For 3507/3507 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 5236 event pairs, 188 based on Foata normal form. 22/1098 useless extension candidates. Maximal degree in co-relation 2959. Up to 563 conditions per place. [2024-11-22 21:53:26,404 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 78 selfloop transitions, 19 changer transitions 8/106 dead transitions. [2024-11-22 21:53:26,405 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 106 transitions, 1076 flow [2024-11-22 21:53:26,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:53:26,405 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:53:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-11-22 21:53:26,406 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6486486486486487 [2024-11-22 21:53:26,406 INFO L175 Difference]: Start difference. First operand has 65 places, 56 transitions, 492 flow. Second operand 6 states and 144 transitions. [2024-11-22 21:53:26,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 106 transitions, 1076 flow [2024-11-22 21:53:26,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 106 transitions, 1054 flow, removed 11 selfloop flow, removed 0 redundant places. [2024-11-22 21:53:26,412 INFO L231 Difference]: Finished difference. Result has 74 places, 65 transitions, 665 flow [2024-11-22 21:53:26,412 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=482, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=665, PETRI_PLACES=74, PETRI_TRANSITIONS=65} [2024-11-22 21:53:26,413 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 36 predicate places. [2024-11-22 21:53:26,414 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 65 transitions, 665 flow [2024-11-22 21:53:26,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:26,414 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:26,414 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:26,420 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-22 21:53:26,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-22 21:53:26,619 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:26,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:26,619 INFO L85 PathProgramCache]: Analyzing trace with hash 25257157, now seen corresponding path program 4 times [2024-11-22 21:53:26,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:26,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [12216407] [2024-11-22 21:53:26,619 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:53:26,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:26,628 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:53:26,628 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:26,689 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:26,689 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:26,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [12216407] [2024-11-22 21:53:26,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [12216407] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:26,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:26,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-22 21:53:26,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157684552] [2024-11-22 21:53:26,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:26,690 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-22 21:53:26,692 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:26,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-22 21:53:26,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2024-11-22 21:53:26,692 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-22 21:53:26,692 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 65 transitions, 665 flow. Second operand has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:26,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:26,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-22 21:53:26,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:26,899 INFO L124 PetriNetUnfolderBase]: 587/1062 cut-off events. [2024-11-22 21:53:26,899 INFO L125 PetriNetUnfolderBase]: For 4615/4615 co-relation queries the response was YES. [2024-11-22 21:53:26,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4793 conditions, 1062 events. 587/1062 cut-off events. For 4615/4615 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5047 event pairs, 201 based on Foata normal form. 22/1084 useless extension candidates. Maximal degree in co-relation 3367. Up to 617 conditions per place. [2024-11-22 21:53:26,904 INFO L140 encePairwiseOnDemand]: 30/37 looper letters, 79 selfloop transitions, 33 changer transitions 5/118 dead transitions. [2024-11-22 21:53:26,905 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 118 transitions, 1288 flow [2024-11-22 21:53:26,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-22 21:53:26,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-22 21:53:26,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 160 transitions. [2024-11-22 21:53:26,906 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6177606177606177 [2024-11-22 21:53:26,906 INFO L175 Difference]: Start difference. First operand has 74 places, 65 transitions, 665 flow. Second operand 7 states and 160 transitions. [2024-11-22 21:53:26,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 118 transitions, 1288 flow [2024-11-22 21:53:26,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 118 transitions, 1262 flow, removed 4 selfloop flow, removed 1 redundant places. [2024-11-22 21:53:26,914 INFO L231 Difference]: Finished difference. Result has 83 places, 76 transitions, 916 flow [2024-11-22 21:53:26,914 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=624, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=916, PETRI_PLACES=83, PETRI_TRANSITIONS=76} [2024-11-22 21:53:26,915 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 45 predicate places. [2024-11-22 21:53:26,915 INFO L471 AbstractCegarLoop]: Abstraction has has 83 places, 76 transitions, 916 flow [2024-11-22 21:53:26,915 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.833333333333332) internal successors, (101), 6 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:26,915 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:26,915 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:26,916 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-22 21:53:26,916 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:26,916 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:26,916 INFO L85 PathProgramCache]: Analyzing trace with hash 1661745421, now seen corresponding path program 5 times [2024-11-22 21:53:26,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:26,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [822472317] [2024-11-22 21:53:26,917 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:53:26,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:26,925 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:53:26,925 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:26,963 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:26,963 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:26,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [822472317] [2024-11-22 21:53:26,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [822472317] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:26,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:26,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-22 21:53:26,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532592560] [2024-11-22 21:53:26,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:26,965 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-22 21:53:26,965 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:26,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-22 21:53:26,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-22 21:53:26,965 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-22 21:53:26,966 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 76 transitions, 916 flow. Second operand has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:26,966 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:26,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-22 21:53:26,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:27,114 INFO L124 PetriNetUnfolderBase]: 571/1010 cut-off events. [2024-11-22 21:53:27,114 INFO L125 PetriNetUnfolderBase]: For 6403/6403 co-relation queries the response was YES. [2024-11-22 21:53:27,117 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5173 conditions, 1010 events. 571/1010 cut-off events. For 6403/6403 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 4690 event pairs, 136 based on Foata normal form. 4/1014 useless extension candidates. Maximal degree in co-relation 4222. Up to 482 conditions per place. [2024-11-22 21:53:27,121 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 83 selfloop transitions, 25 changer transitions 7/116 dead transitions. [2024-11-22 21:53:27,121 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 87 places, 116 transitions, 1512 flow [2024-11-22 21:53:27,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-22 21:53:27,122 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-22 21:53:27,122 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 133 transitions. [2024-11-22 21:53:27,122 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5990990990990991 [2024-11-22 21:53:27,122 INFO L175 Difference]: Start difference. First operand has 83 places, 76 transitions, 916 flow. Second operand 6 states and 133 transitions. [2024-11-22 21:53:27,122 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 87 places, 116 transitions, 1512 flow [2024-11-22 21:53:27,135 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 84 places, 116 transitions, 1444 flow, removed 16 selfloop flow, removed 3 redundant places. [2024-11-22 21:53:27,138 INFO L231 Difference]: Finished difference. Result has 87 places, 84 transitions, 1063 flow [2024-11-22 21:53:27,139 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=868, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1063, PETRI_PLACES=87, PETRI_TRANSITIONS=84} [2024-11-22 21:53:27,139 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 49 predicate places. [2024-11-22 21:53:27,139 INFO L471 AbstractCegarLoop]: Abstraction has has 87 places, 84 transitions, 1063 flow [2024-11-22 21:53:27,139 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.4) internal successors, (87), 5 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:27,139 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:27,139 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:27,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-22 21:53:27,139 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:27,140 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:27,140 INFO L85 PathProgramCache]: Analyzing trace with hash -833850976, now seen corresponding path program 1 times [2024-11-22 21:53:27,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:27,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1695865124] [2024-11-22 21:53:27,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:27,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:27,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:27,210 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:27,211 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:27,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1695865124] [2024-11-22 21:53:27,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1695865124] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-22 21:53:27,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-22 21:53:27,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-22 21:53:27,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1588716700] [2024-11-22 21:53:27,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-22 21:53:27,211 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-22 21:53:27,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:27,213 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-22 21:53:27,213 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-22 21:53:27,213 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-22 21:53:27,213 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 84 transitions, 1063 flow. Second operand has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:27,213 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:27,213 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-22 21:53:27,213 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:27,343 INFO L124 PetriNetUnfolderBase]: 577/1000 cut-off events. [2024-11-22 21:53:27,344 INFO L125 PetriNetUnfolderBase]: For 6794/6794 co-relation queries the response was YES. [2024-11-22 21:53:27,346 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5389 conditions, 1000 events. 577/1000 cut-off events. For 6794/6794 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 4413 event pairs, 90 based on Foata normal form. 28/1028 useless extension candidates. Maximal degree in co-relation 5161. Up to 735 conditions per place. [2024-11-22 21:53:27,350 INFO L140 encePairwiseOnDemand]: 32/37 looper letters, 87 selfloop transitions, 12 changer transitions 3/103 dead transitions. [2024-11-22 21:53:27,350 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 103 transitions, 1428 flow [2024-11-22 21:53:27,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-22 21:53:27,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-22 21:53:27,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2024-11-22 21:53:27,351 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6418918918918919 [2024-11-22 21:53:27,351 INFO L175 Difference]: Start difference. First operand has 87 places, 84 transitions, 1063 flow. Second operand 4 states and 95 transitions. [2024-11-22 21:53:27,351 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 103 transitions, 1428 flow [2024-11-22 21:53:27,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 103 transitions, 1418 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-11-22 21:53:27,363 INFO L231 Difference]: Finished difference. Result has 90 places, 85 transitions, 1107 flow [2024-11-22 21:53:27,363 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1011, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1107, PETRI_PLACES=90, PETRI_TRANSITIONS=85} [2024-11-22 21:53:27,364 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 52 predicate places. [2024-11-22 21:53:27,364 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 85 transitions, 1107 flow [2024-11-22 21:53:27,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.75) internal successors, (75), 4 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:27,364 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:27,364 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] [2024-11-22 21:53:27,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-22 21:53:27,364 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:27,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:27,365 INFO L85 PathProgramCache]: Analyzing trace with hash -1423489930, now seen corresponding path program 1 times [2024-11-22 21:53:27,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:27,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1314218281] [2024-11-22 21:53:27,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:27,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:27,382 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:27,722 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:53:27,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:27,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1314218281] [2024-11-22 21:53:27,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1314218281] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:27,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273963086] [2024-11-22 21:53:27,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-22 21:53:27,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:27,723 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:27,725 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:53:27,727 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-22 21:53:27,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:53:27,781 INFO L255 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-22 21:53:27,783 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:27,810 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 [2024-11-22 21:53:27,913 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 15 treesize of output 7 [2024-11-22 21:53:27,932 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:27,933 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:28,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 29 [2024-11-22 21:53:28,166 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-11-22 21:53:28,167 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 62 treesize of output 41 [2024-11-22 21:53:28,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:28,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [273963086] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:53:28,224 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:53:28,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 22 [2024-11-22 21:53:28,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836451667] [2024-11-22 21:53:28,224 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:53:28,225 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 21:53:28,225 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:53:28,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 21:53:28,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=404, Unknown=0, NotChecked=0, Total=462 [2024-11-22 21:53:28,740 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-22 21:53:28,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 85 transitions, 1107 flow. Second operand has 22 states, 22 states have (on average 16.681818181818183) internal successors, (367), 22 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:28,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:53:28,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-22 21:53:28,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:53:31,570 INFO L124 PetriNetUnfolderBase]: 1113/1923 cut-off events. [2024-11-22 21:53:31,570 INFO L125 PetriNetUnfolderBase]: For 13513/13513 co-relation queries the response was YES. [2024-11-22 21:53:31,575 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10131 conditions, 1923 events. 1113/1923 cut-off events. For 13513/13513 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 9691 event pairs, 87 based on Foata normal form. 9/1932 useless extension candidates. Maximal degree in co-relation 8499. Up to 345 conditions per place. [2024-11-22 21:53:31,578 INFO L140 encePairwiseOnDemand]: 22/37 looper letters, 126 selfloop transitions, 68 changer transitions 175/370 dead transitions. [2024-11-22 21:53:31,579 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 370 transitions, 4247 flow [2024-11-22 21:53:31,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2024-11-22 21:53:31,580 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2024-11-22 21:53:31,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 909 transitions. [2024-11-22 21:53:31,584 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5583538083538083 [2024-11-22 21:53:31,584 INFO L175 Difference]: Start difference. First operand has 90 places, 85 transitions, 1107 flow. Second operand 44 states and 909 transitions. [2024-11-22 21:53:31,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 370 transitions, 4247 flow [2024-11-22 21:53:31,602 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 370 transitions, 4207 flow, removed 14 selfloop flow, removed 2 redundant places. [2024-11-22 21:53:31,605 INFO L231 Difference]: Finished difference. Result has 142 places, 102 transitions, 1250 flow [2024-11-22 21:53:31,605 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1093, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=44, PETRI_FLOW=1250, PETRI_PLACES=142, PETRI_TRANSITIONS=102} [2024-11-22 21:53:31,606 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 104 predicate places. [2024-11-22 21:53:31,606 INFO L471 AbstractCegarLoop]: Abstraction has has 142 places, 102 transitions, 1250 flow [2024-11-22 21:53:31,606 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 16.681818181818183) internal successors, (367), 22 states have internal predecessors, (367), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:53:31,606 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:53:31,606 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:53:31,616 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-22 21:53:31,810 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,SelfDestructingSolverStorable20 [2024-11-22 21:53:31,810 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:53:31,811 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:53:31,811 INFO L85 PathProgramCache]: Analyzing trace with hash 166336713, now seen corresponding path program 2 times [2024-11-22 21:53:31,811 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:53:31,811 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152494548] [2024-11-22 21:53:31,811 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:31,811 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:53:31,830 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:53:31,830 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:32,107 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:53:32,107 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:53:32,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152494548] [2024-11-22 21:53:32,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [152494548] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:53:32,107 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [314212238] [2024-11-22 21:53:32,107 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:53:32,108 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:53:32,108 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:53:32,109 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:53:32,110 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-22 21:53:32,165 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:53:32,166 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:53:32,167 INFO L255 TraceCheckSpWp]: Trace formula consists of 188 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-22 21:53:32,172 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:53:32,233 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 [2024-11-22 21:53:32,408 INFO L349 Elim1Store]: treesize reduction 13, result has 48.0 percent of original size [2024-11-22 21:53:32,408 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 67 treesize of output 40 [2024-11-22 21:53:32,436 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:53:32,437 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:53:32,770 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 192 treesize of output 170 [2024-11-22 21:53:32,852 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:53:32,852 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 9 new quantified variables, introduced 15 case distinctions, treesize of input 611 treesize of output 509 [2024-11-22 21:54:05,801 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:54:05,801 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [314212238] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:54:05,801 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:54:05,801 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 9, 9] total 22 [2024-11-22 21:54:05,801 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [935100298] [2024-11-22 21:54:05,801 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:54:05,802 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 21:54:05,802 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:54:05,802 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 21:54:05,803 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2024-11-22 21:54:06,300 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-22 21:54:06,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 142 places, 102 transitions, 1250 flow. Second operand has 22 states, 22 states have (on average 17.045454545454547) internal successors, (375), 22 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:54:06,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:54:06,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-22 21:54:06,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:54:08,164 INFO L124 PetriNetUnfolderBase]: 1261/2212 cut-off events. [2024-11-22 21:54:08,164 INFO L125 PetriNetUnfolderBase]: For 20027/20027 co-relation queries the response was YES. [2024-11-22 21:54:08,171 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12852 conditions, 2212 events. 1261/2212 cut-off events. For 20027/20027 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 11649 event pairs, 16 based on Foata normal form. 32/2244 useless extension candidates. Maximal degree in co-relation 12807. Up to 487 conditions per place. [2024-11-22 21:54:08,179 INFO L140 encePairwiseOnDemand]: 25/37 looper letters, 209 selfloop transitions, 141 changer transitions 32/383 dead transitions. [2024-11-22 21:54:08,179 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 383 transitions, 4736 flow [2024-11-22 21:54:08,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-22 21:54:08,179 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 39 states. [2024-11-22 21:54:08,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 39 states to 39 states and 803 transitions. [2024-11-22 21:54:08,181 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5564795564795565 [2024-11-22 21:54:08,181 INFO L175 Difference]: Start difference. First operand has 142 places, 102 transitions, 1250 flow. Second operand 39 states and 803 transitions. [2024-11-22 21:54:08,181 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 383 transitions, 4736 flow [2024-11-22 21:54:08,223 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 383 transitions, 4027 flow, removed 296 selfloop flow, removed 23 redundant places. [2024-11-22 21:54:08,228 INFO L231 Difference]: Finished difference. Result has 147 places, 197 transitions, 2349 flow [2024-11-22 21:54:08,229 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1006, PETRI_DIFFERENCE_MINUEND_PLACES=93, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=57, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=39, PETRI_FLOW=2349, PETRI_PLACES=147, PETRI_TRANSITIONS=197} [2024-11-22 21:54:08,229 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 109 predicate places. [2024-11-22 21:54:08,230 INFO L471 AbstractCegarLoop]: Abstraction has has 147 places, 197 transitions, 2349 flow [2024-11-22 21:54:08,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 17.045454545454547) internal successors, (375), 22 states have internal predecessors, (375), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:54:08,230 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:54:08,230 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:54:08,236 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2024-11-22 21:54:08,434 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,SelfDestructingSolverStorable21 [2024-11-22 21:54:08,435 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:54:08,435 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:54:08,435 INFO L85 PathProgramCache]: Analyzing trace with hash 2097104287, now seen corresponding path program 3 times [2024-11-22 21:54:08,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:54:08,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1030305285] [2024-11-22 21:54:08,435 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:54:08,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:54:08,451 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:54:08,451 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:08,548 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:54:08,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:54:08,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1030305285] [2024-11-22 21:54:08,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1030305285] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:54:08,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012791614] [2024-11-22 21:54:08,549 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:54:08,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:54:08,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:54:08,551 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:54:08,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-22 21:54:08,658 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-22 21:54:08,659 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:08,660 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-22 21:54:08,661 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:54:08,747 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:54:08,748 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:54:08,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:54:08,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012791614] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:54:08,823 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:54:08,823 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 12 [2024-11-22 21:54:08,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010379496] [2024-11-22 21:54:08,824 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:54:08,824 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-22 21:54:08,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:54:08,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-22 21:54:08,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2024-11-22 21:54:08,825 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-22 21:54:08,825 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 147 places, 197 transitions, 2349 flow. Second operand has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:54:08,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:54:08,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-22 21:54:08,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:54:09,260 INFO L124 PetriNetUnfolderBase]: 1183/2028 cut-off events. [2024-11-22 21:54:09,261 INFO L125 PetriNetUnfolderBase]: For 29215/29215 co-relation queries the response was YES. [2024-11-22 21:54:09,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12221 conditions, 2028 events. 1183/2028 cut-off events. For 29215/29215 co-relation queries the response was YES. Maximal size of possible extension queue 73. Compared 10097 event pairs, 132 based on Foata normal form. 98/2126 useless extension candidates. Maximal degree in co-relation 12175. Up to 510 conditions per place. [2024-11-22 21:54:09,272 INFO L140 encePairwiseOnDemand]: 31/37 looper letters, 237 selfloop transitions, 78 changer transitions 0/316 dead transitions. [2024-11-22 21:54:09,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 316 transitions, 4057 flow [2024-11-22 21:54:09,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-22 21:54:09,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-22 21:54:09,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-11-22 21:54:09,274 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6306306306306306 [2024-11-22 21:54:09,274 INFO L175 Difference]: Start difference. First operand has 147 places, 197 transitions, 2349 flow. Second operand 9 states and 210 transitions. [2024-11-22 21:54:09,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 316 transitions, 4057 flow [2024-11-22 21:54:09,318 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 132 places, 316 transitions, 3697 flow, removed 167 selfloop flow, removed 11 redundant places. [2024-11-22 21:54:09,321 INFO L231 Difference]: Finished difference. Result has 133 places, 191 transitions, 2212 flow [2024-11-22 21:54:09,322 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=1925, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=179, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=2212, PETRI_PLACES=133, PETRI_TRANSITIONS=191} [2024-11-22 21:54:09,322 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 95 predicate places. [2024-11-22 21:54:09,322 INFO L471 AbstractCegarLoop]: Abstraction has has 133 places, 191 transitions, 2212 flow [2024-11-22 21:54:09,322 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.75) internal successors, (213), 12 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:54:09,322 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:54:09,323 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:54:09,330 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2024-11-22 21:54:09,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2024-11-22 21:54:09,523 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:54:09,524 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:54:09,524 INFO L85 PathProgramCache]: Analyzing trace with hash 1400951279, now seen corresponding path program 4 times [2024-11-22 21:54:09,524 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:54:09,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644425731] [2024-11-22 21:54:09,524 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:54:09,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:54:09,567 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:54:09,567 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:10,298 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:54:10,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:54:10,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644425731] [2024-11-22 21:54:10,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644425731] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:54:10,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [787127479] [2024-11-22 21:54:10,299 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-11-22 21:54:10,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:54:10,299 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:54:10,301 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:54:10,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-22 21:54:10,359 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-11-22 21:54:10,359 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:10,360 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-22 21:54:10,361 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:54:10,489 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:54:10,490 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 45 [2024-11-22 21:54:10,499 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:54:10,499 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:54:10,677 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2024-11-22 21:54:10,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2024-11-22 21:54:10,814 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:54:10,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [787127479] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:54:10,815 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:54:10,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9, 7] total 21 [2024-11-22 21:54:10,815 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057281734] [2024-11-22 21:54:10,815 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:54:10,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-11-22 21:54:10,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:54:10,816 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-11-22 21:54:10,816 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2024-11-22 21:54:11,402 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-22 21:54:11,403 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 133 places, 191 transitions, 2212 flow. Second operand has 22 states, 22 states have (on average 17.0) internal successors, (374), 22 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:54:11,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:54:11,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-22 21:54:11,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:54:12,258 INFO L124 PetriNetUnfolderBase]: 1726/2968 cut-off events. [2024-11-22 21:54:12,258 INFO L125 PetriNetUnfolderBase]: For 34792/34792 co-relation queries the response was YES. [2024-11-22 21:54:12,266 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18190 conditions, 2968 events. 1726/2968 cut-off events. For 34792/34792 co-relation queries the response was YES. Maximal size of possible extension queue 113. Compared 15633 event pairs, 188 based on Foata normal form. 1/2969 useless extension candidates. Maximal degree in co-relation 18150. Up to 1317 conditions per place. [2024-11-22 21:54:12,274 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 225 selfloop transitions, 137 changer transitions 1/364 dead transitions. [2024-11-22 21:54:12,274 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 152 places, 364 transitions, 4561 flow [2024-11-22 21:54:12,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-22 21:54:12,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 20 states. [2024-11-22 21:54:12,276 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 438 transitions. [2024-11-22 21:54:12,276 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5918918918918918 [2024-11-22 21:54:12,276 INFO L175 Difference]: Start difference. First operand has 133 places, 191 transitions, 2212 flow. Second operand 20 states and 438 transitions. [2024-11-22 21:54:12,276 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 152 places, 364 transitions, 4561 flow [2024-11-22 21:54:12,333 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 138 places, 364 transitions, 4226 flow, removed 81 selfloop flow, removed 14 redundant places. [2024-11-22 21:54:12,338 INFO L231 Difference]: Finished difference. Result has 144 places, 250 transitions, 3066 flow [2024-11-22 21:54:12,339 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2034, PETRI_DIFFERENCE_MINUEND_PLACES=119, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=191, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=20, PETRI_FLOW=3066, PETRI_PLACES=144, PETRI_TRANSITIONS=250} [2024-11-22 21:54:12,339 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 106 predicate places. [2024-11-22 21:54:12,339 INFO L471 AbstractCegarLoop]: Abstraction has has 144 places, 250 transitions, 3066 flow [2024-11-22 21:54:12,339 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 17.0) internal successors, (374), 22 states have internal predecessors, (374), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:54:12,339 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:54:12,339 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:54:12,346 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2024-11-22 21:54:12,543 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:54:12,544 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:54:12,544 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:54:12,544 INFO L85 PathProgramCache]: Analyzing trace with hash 1616263103, now seen corresponding path program 5 times [2024-11-22 21:54:12,544 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:54:12,544 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1472029560] [2024-11-22 21:54:12,544 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:54:12,544 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:54:12,566 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-22 21:54:12,566 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:13,171 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:54:13,171 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:54:13,171 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1472029560] [2024-11-22 21:54:13,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1472029560] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:54:13,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [669129809] [2024-11-22 21:54:13,172 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2024-11-22 21:54:13,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:54:13,172 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:54:13,173 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:54:13,174 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-22 21:54:13,237 INFO L227 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2024-11-22 21:54:13,237 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:13,238 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-22 21:54:13,239 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:54:13,464 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:54:13,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2024-11-22 21:54:13,469 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:54:13,469 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:54:13,769 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2024-11-22 21:54:13,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2024-11-22 21:54:13,973 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 1 proven. 9 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:54:13,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [669129809] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:54:13,974 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:54:13,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 12, 10] total 32 [2024-11-22 21:54:13,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851723850] [2024-11-22 21:54:13,974 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:54:13,974 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-22 21:54:13,974 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:54:13,975 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-22 21:54:13,975 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=106, Invalid=950, Unknown=0, NotChecked=0, Total=1056 [2024-11-22 21:54:15,049 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-22 21:54:15,049 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 250 transitions, 3066 flow. Second operand has 33 states, 33 states have (on average 16.151515151515152) internal successors, (533), 33 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:54:15,049 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:54:15,049 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-22 21:54:15,049 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:54:17,563 INFO L124 PetriNetUnfolderBase]: 4429/7638 cut-off events. [2024-11-22 21:54:17,563 INFO L125 PetriNetUnfolderBase]: For 49385/49385 co-relation queries the response was YES. [2024-11-22 21:54:17,584 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43220 conditions, 7638 events. 4429/7638 cut-off events. For 49385/49385 co-relation queries the response was YES. Maximal size of possible extension queue 263. Compared 48457 event pairs, 397 based on Foata normal form. 6/7644 useless extension candidates. Maximal degree in co-relation 43184. Up to 2220 conditions per place. [2024-11-22 21:54:17,605 INFO L140 encePairwiseOnDemand]: 27/37 looper letters, 361 selfloop transitions, 393 changer transitions 2/757 dead transitions. [2024-11-22 21:54:17,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 184 places, 757 transitions, 9546 flow [2024-11-22 21:54:17,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2024-11-22 21:54:17,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2024-11-22 21:54:17,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 912 transitions. [2024-11-22 21:54:17,607 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6011865524060646 [2024-11-22 21:54:17,607 INFO L175 Difference]: Start difference. First operand has 144 places, 250 transitions, 3066 flow. Second operand 41 states and 912 transitions. [2024-11-22 21:54:17,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 184 places, 757 transitions, 9546 flow [2024-11-22 21:54:17,679 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 177 places, 757 transitions, 9457 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-11-22 21:54:17,686 INFO L231 Difference]: Finished difference. Result has 187 places, 537 transitions, 7342 flow [2024-11-22 21:54:17,686 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=2985, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=250, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=74, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=7342, PETRI_PLACES=187, PETRI_TRANSITIONS=537} [2024-11-22 21:54:17,686 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 149 predicate places. [2024-11-22 21:54:17,686 INFO L471 AbstractCegarLoop]: Abstraction has has 187 places, 537 transitions, 7342 flow [2024-11-22 21:54:17,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 16.151515151515152) internal successors, (533), 33 states have internal predecessors, (533), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:54:17,687 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:54:17,687 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:54:17,693 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2024-11-22 21:54:17,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:54:17,887 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:54:17,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:54:17,888 INFO L85 PathProgramCache]: Analyzing trace with hash 2071202303, now seen corresponding path program 6 times [2024-11-22 21:54:17,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:54:17,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559655815] [2024-11-22 21:54:17,888 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:54:17,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:54:17,912 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-22 21:54:17,913 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:18,923 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:54:18,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:54:18,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559655815] [2024-11-22 21:54:18,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559655815] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:54:18,924 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1585342146] [2024-11-22 21:54:18,924 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2024-11-22 21:54:18,924 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:54:18,924 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:54:18,926 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:54:18,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2024-11-22 21:54:19,004 INFO L227 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2024-11-22 21:54:19,004 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:19,006 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 27 conjuncts are in the unsatisfiable core [2024-11-22 21:54:19,007 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:54:19,223 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:54:19,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2024-11-22 21:54:19,232 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:54:19,232 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:54:19,465 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2024-11-22 21:54:19,466 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2024-11-22 21:54:19,653 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:54:19,653 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1585342146] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:54:19,653 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:54:19,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 10, 7] total 26 [2024-11-22 21:54:19,654 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336863759] [2024-11-22 21:54:19,654 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:54:19,654 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2024-11-22 21:54:19,654 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:54:19,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2024-11-22 21:54:19,655 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=617, Unknown=0, NotChecked=0, Total=702 [2024-11-22 21:54:20,278 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-22 21:54:20,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 187 places, 537 transitions, 7342 flow. Second operand has 27 states, 27 states have (on average 16.62962962962963) internal successors, (449), 27 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:54:20,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:54:20,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-22 21:54:20,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:54:22,626 INFO L124 PetriNetUnfolderBase]: 6130/10581 cut-off events. [2024-11-22 21:54:22,627 INFO L125 PetriNetUnfolderBase]: For 104345/104345 co-relation queries the response was YES. [2024-11-22 21:54:22,662 INFO L83 FinitePrefix]: Finished finitePrefix Result has 70099 conditions, 10581 events. 6130/10581 cut-off events. For 104345/104345 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 72460 event pairs, 1402 based on Foata normal form. 4/10585 useless extension candidates. Maximal degree in co-relation 70052. Up to 7347 conditions per place. [2024-11-22 21:54:22,698 INFO L140 encePairwiseOnDemand]: 28/37 looper letters, 620 selfloop transitions, 230 changer transitions 2/853 dead transitions. [2024-11-22 21:54:22,699 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 853 transitions, 12845 flow [2024-11-22 21:54:22,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2024-11-22 21:54:22,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 36 states. [2024-11-22 21:54:22,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 725 transitions. [2024-11-22 21:54:22,700 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5442942942942943 [2024-11-22 21:54:22,700 INFO L175 Difference]: Start difference. First operand has 187 places, 537 transitions, 7342 flow. Second operand 36 states and 725 transitions. [2024-11-22 21:54:22,701 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 853 transitions, 12845 flow [2024-11-22 21:54:22,961 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 853 transitions, 12246 flow, removed 261 selfloop flow, removed 11 redundant places. [2024-11-22 21:54:22,970 INFO L231 Difference]: Finished difference. Result has 225 places, 710 transitions, 10051 flow [2024-11-22 21:54:22,970 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=6781, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=537, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=92, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=388, PETRI_DIFFERENCE_SUBTRAHEND_STATES=36, PETRI_FLOW=10051, PETRI_PLACES=225, PETRI_TRANSITIONS=710} [2024-11-22 21:54:22,971 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 187 predicate places. [2024-11-22 21:54:22,971 INFO L471 AbstractCegarLoop]: Abstraction has has 225 places, 710 transitions, 10051 flow [2024-11-22 21:54:22,971 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 27 states have (on average 16.62962962962963) internal successors, (449), 27 states have internal predecessors, (449), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:54:22,971 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:54:22,971 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:54:22,978 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2024-11-22 21:54:23,175 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2024-11-22 21:54:23,175 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:54:23,176 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:54:23,176 INFO L85 PathProgramCache]: Analyzing trace with hash -933561209, now seen corresponding path program 7 times [2024-11-22 21:54:23,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:54:23,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382820175] [2024-11-22 21:54:23,176 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:54:23,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:54:23,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:54:23,955 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:54:23,955 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:54:23,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382820175] [2024-11-22 21:54:23,955 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382820175] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:54:23,955 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [510961253] [2024-11-22 21:54:23,955 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2024-11-22 21:54:23,955 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:54:23,955 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:54:23,956 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:54:23,957 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2024-11-22 21:54:24,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-22 21:54:24,009 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-22 21:54:24,010 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:54:24,134 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:54:24,134 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 47 treesize of output 45 [2024-11-22 21:54:24,139 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 13 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-22 21:54:24,139 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:54:24,315 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2024-11-22 21:54:24,315 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2024-11-22 21:54:24,435 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 2 proven. 7 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:54:24,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [510961253] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:54:24,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:54:24,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 24 [2024-11-22 21:54:24,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1579207980] [2024-11-22 21:54:24,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:54:24,435 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-22 21:54:24,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:54:24,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-22 21:54:24,436 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=496, Unknown=0, NotChecked=0, Total=600 [2024-11-22 21:54:24,831 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-22 21:54:24,831 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 710 transitions, 10051 flow. Second operand has 25 states, 25 states have (on average 16.92) internal successors, (423), 25 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:54:24,831 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:54:24,831 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-22 21:54:24,831 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:54:27,216 INFO L124 PetriNetUnfolderBase]: 7020/12128 cut-off events. [2024-11-22 21:54:27,216 INFO L125 PetriNetUnfolderBase]: For 147029/147029 co-relation queries the response was YES. [2024-11-22 21:54:27,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84789 conditions, 12128 events. 7020/12128 cut-off events. For 147029/147029 co-relation queries the response was YES. Maximal size of possible extension queue 460. Compared 85608 event pairs, 1405 based on Foata normal form. 6/12134 useless extension candidates. Maximal degree in co-relation 84728. Up to 7984 conditions per place. [2024-11-22 21:54:27,314 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 632 selfloop transitions, 300 changer transitions 2/935 dead transitions. [2024-11-22 21:54:27,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 250 places, 935 transitions, 14958 flow [2024-11-22 21:54:27,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2024-11-22 21:54:27,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2024-11-22 21:54:27,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 561 transitions. [2024-11-22 21:54:27,315 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5831600831600832 [2024-11-22 21:54:27,315 INFO L175 Difference]: Start difference. First operand has 225 places, 710 transitions, 10051 flow. Second operand 26 states and 561 transitions. [2024-11-22 21:54:27,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 250 places, 935 transitions, 14958 flow [2024-11-22 21:54:27,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 243 places, 935 transitions, 14561 flow, removed 178 selfloop flow, removed 7 redundant places. [2024-11-22 21:54:27,744 INFO L231 Difference]: Finished difference. Result has 246 places, 792 transitions, 11975 flow [2024-11-22 21:54:27,745 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=9668, PETRI_DIFFERENCE_MINUEND_PLACES=218, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=710, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=227, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=476, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=11975, PETRI_PLACES=246, PETRI_TRANSITIONS=792} [2024-11-22 21:54:27,745 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 208 predicate places. [2024-11-22 21:54:27,745 INFO L471 AbstractCegarLoop]: Abstraction has has 246 places, 792 transitions, 11975 flow [2024-11-22 21:54:27,746 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 16.92) internal successors, (423), 25 states have internal predecessors, (423), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:54:27,746 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:54:27,746 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:54:27,752 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2024-11-22 21:54:27,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2024-11-22 21:54:27,946 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:54:27,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:54:27,947 INFO L85 PathProgramCache]: Analyzing trace with hash 1603602289, now seen corresponding path program 8 times [2024-11-22 21:54:27,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:54:27,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1841121237] [2024-11-22 21:54:27,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:54:27,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:54:27,961 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:54:27,962 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:28,673 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:54:28,673 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:54:28,673 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1841121237] [2024-11-22 21:54:28,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1841121237] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:54:28,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104363880] [2024-11-22 21:54:28,674 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-22 21:54:28,674 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:54:28,674 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:54:28,675 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:54:28,677 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2024-11-22 21:54:28,727 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-22 21:54:28,728 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:28,728 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 25 conjuncts are in the unsatisfiable core [2024-11-22 21:54:28,729 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:54:28,875 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:54:28,875 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2024-11-22 21:54:28,881 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-22 21:54:28,881 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:54:29,059 INFO L349 Elim1Store]: treesize reduction 15, result has 90.2 percent of original size [2024-11-22 21:54:29,059 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 10 new quantified variables, introduced 15 case distinctions, treesize of input 51 treesize of output 173 [2024-11-22 21:54:29,161 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-22 21:54:29,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [104363880] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-22 21:54:29,161 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-22 21:54:29,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 7] total 24 [2024-11-22 21:54:29,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1304771300] [2024-11-22 21:54:29,161 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-22 21:54:29,162 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-22 21:54:29,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-22 21:54:29,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-22 21:54:29,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=512, Unknown=0, NotChecked=0, Total=600 [2024-11-22 21:54:29,688 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 37 [2024-11-22 21:54:29,688 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 792 transitions, 11975 flow. Second operand has 25 states, 25 states have (on average 16.84) internal successors, (421), 25 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:54:29,688 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-22 21:54:29,688 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 37 [2024-11-22 21:54:29,688 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-22 21:54:33,577 INFO L124 PetriNetUnfolderBase]: 9494/16427 cut-off events. [2024-11-22 21:54:33,577 INFO L125 PetriNetUnfolderBase]: For 203762/203762 co-relation queries the response was YES. [2024-11-22 21:54:33,642 INFO L83 FinitePrefix]: Finished finitePrefix Result has 115866 conditions, 16427 events. 9494/16427 cut-off events. For 203762/203762 co-relation queries the response was YES. Maximal size of possible extension queue 618. Compared 121680 event pairs, 1323 based on Foata normal form. 13/16440 useless extension candidates. Maximal degree in co-relation 115801. Up to 7365 conditions per place. [2024-11-22 21:54:33,698 INFO L140 encePairwiseOnDemand]: 29/37 looper letters, 608 selfloop transitions, 582 changer transitions 4/1195 dead transitions. [2024-11-22 21:54:33,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 1195 transitions, 19623 flow [2024-11-22 21:54:33,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2024-11-22 21:54:33,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 29 states. [2024-11-22 21:54:33,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 653 transitions. [2024-11-22 21:54:33,700 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.608574091332712 [2024-11-22 21:54:33,700 INFO L175 Difference]: Start difference. First operand has 246 places, 792 transitions, 11975 flow. Second operand 29 states and 653 transitions. [2024-11-22 21:54:33,700 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 1195 transitions, 19623 flow [2024-11-22 21:54:34,442 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 264 places, 1195 transitions, 19448 flow, removed 55 selfloop flow, removed 10 redundant places. [2024-11-22 21:54:34,457 INFO L231 Difference]: Finished difference. Result has 273 places, 1022 transitions, 17322 flow [2024-11-22 21:54:34,457 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=37, PETRI_DIFFERENCE_MINUEND_FLOW=11801, PETRI_DIFFERENCE_MINUEND_PLACES=236, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=792, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=370, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=29, PETRI_FLOW=17322, PETRI_PLACES=273, PETRI_TRANSITIONS=1022} [2024-11-22 21:54:34,457 INFO L277 CegarLoopForPetriNet]: 38 programPoint places, 235 predicate places. [2024-11-22 21:54:34,457 INFO L471 AbstractCegarLoop]: Abstraction has has 273 places, 1022 transitions, 17322 flow [2024-11-22 21:54:34,458 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 16.84) internal successors, (421), 25 states have internal predecessors, (421), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-22 21:54:34,458 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-22 21:54:34,458 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-22 21:54:34,464 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2024-11-22 21:54:34,658 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2024-11-22 21:54:34,659 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-22 21:54:34,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-22 21:54:34,659 INFO L85 PathProgramCache]: Analyzing trace with hash -1906028681, now seen corresponding path program 9 times [2024-11-22 21:54:34,659 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-22 21:54:34,659 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578777382] [2024-11-22 21:54:34,659 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:54:34,659 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-22 21:54:34,691 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 21:54:34,692 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:35,480 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:54:35,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-22 21:54:35,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578777382] [2024-11-22 21:54:35,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578777382] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-22 21:54:35,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216619102] [2024-11-22 21:54:35,480 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-22 21:54:35,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-22 21:54:35,481 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-22 21:54:35,482 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-22 21:54:35,484 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2024-11-22 21:54:35,674 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2024-11-22 21:54:35,674 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-22 21:54:35,675 INFO L255 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 33 conjuncts are in the unsatisfiable core [2024-11-22 21:54:35,676 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-22 21:54:35,713 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 [2024-11-22 21:54:35,860 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-22 21:54:35,860 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 5 new quantified variables, introduced 3 case distinctions, treesize of input 39 treesize of output 41 [2024-11-22 21:54:35,904 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-22 21:54:35,905 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-22 21:54:36,047 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 93 treesize of output 81 [2024-11-22 21:54:36,371 INFO L349 Elim1Store]: treesize reduction 5, result has 98.2 percent of original size [2024-11-22 21:54:36,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 8 select indices, 8 select index equivalence classes, 0 disjoint index pairs (out of 28 index pairs), introduced 13 new quantified variables, introduced 28 case distinctions, treesize of input 1159 treesize of output 974