./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c00e63dc Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c -s /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-jdk21/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 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:08:24,064 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:08:24,117 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:08:24,123 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:08:24,123 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:08:24,142 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:08:24,143 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:08:24,143 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:08:24,144 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:08:24,144 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:08:24,144 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:08:24,144 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:08:24,145 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:08:24,145 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:08:24,145 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:08:24,145 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:08:24,145 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:08:24,145 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:08:24,146 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:08:24,146 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:08:24,146 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:08:24,146 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:08:24,146 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:08:24,146 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:08:24,146 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:08:24,146 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:08:24,146 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:08:24,146 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:08:24,146 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:08:24,146 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:08:24,147 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:08:24,147 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:08:24,147 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:08:24,147 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:08:24,147 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:08:24,147 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:08:24,147 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:08:24,147 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:08:24,148 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:08:24,148 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:08:24,148 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:08:24,148 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:08:24,148 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC 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-jdk21/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 -> 8d3b4a56bf20a7e5cb147a14169234a27b247cfdef3db9f4b8a4f4a17cd6fe47 [2025-02-06 13:08:24,343 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:08:24,348 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:08:24,351 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:08:24,352 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:08:24,352 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:08:24,352 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2025-02-06 13:08:25,475 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/1070ad690/f219f36fad944692a22f1882d0ff7ae5/FLAGfcfc31422 [2025-02-06 13:08:25,712 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:08:25,713 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-more-buffer-series2.wvr.c [2025-02-06 13:08:25,739 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/1070ad690/f219f36fad944692a22f1882d0ff7ae5/FLAGfcfc31422 [2025-02-06 13:08:25,749 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/1070ad690/f219f36fad944692a22f1882d0ff7ae5 [2025-02-06 13:08:25,751 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:08:25,752 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:08:25,753 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:08:25,753 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:08:25,755 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:08:25,756 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:08:25" (1/1) ... [2025-02-06 13:08:25,756 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34a33c17 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:25, skipping insertion in model container [2025-02-06 13:08:25,756 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:08:25" (1/1) ... [2025-02-06 13:08:25,775 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:08:25,908 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-02-06 13:08:25,910 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:08:25,921 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:08:25,948 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:08:25,960 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:08:25,961 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:25 WrapperNode [2025-02-06 13:08:25,961 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:08:25,962 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:08:25,963 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:08:25,963 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:08:25,967 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:25" (1/1) ... [2025-02-06 13:08:25,978 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:25" (1/1) ... [2025-02-06 13:08:26,001 INFO L138 Inliner]: procedures = 26, calls = 64, calls flagged for inlining = 23, calls inlined = 29, statements flattened = 317 [2025-02-06 13:08:26,003 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:08:26,003 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:08:26,004 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:08:26,004 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:08:26,009 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:25" (1/1) ... [2025-02-06 13:08:26,009 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:25" (1/1) ... [2025-02-06 13:08:26,012 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:25" (1/1) ... [2025-02-06 13:08:26,033 INFO L175 MemorySlicer]: Split 12 memory accesses to 2 slices as follows [2, 10]. 83 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2025-02-06 13:08:26,033 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:25" (1/1) ... [2025-02-06 13:08:26,033 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:25" (1/1) ... [2025-02-06 13:08:26,045 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:25" (1/1) ... [2025-02-06 13:08:26,046 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:25" (1/1) ... [2025-02-06 13:08:26,047 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:25" (1/1) ... [2025-02-06 13:08:26,048 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:25" (1/1) ... [2025-02-06 13:08:26,050 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:08:26,050 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:08:26,050 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:08:26,050 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:08:26,051 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:25" (1/1) ... [2025-02-06 13:08:26,062 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:08:26,069 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:26,079 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-02-06 13:08:26,081 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-02-06 13:08:26,095 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:08:26,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:08:26,095 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:08:26,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:08:26,095 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:08:26,095 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:08:26,095 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:08:26,095 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:08:26,095 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:08:26,096 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-06 13:08:26,096 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-06 13:08:26,096 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2025-02-06 13:08:26,096 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2025-02-06 13:08:26,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:08:26,096 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:08:26,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 13:08:26,096 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 13:08:26,096 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:08:26,096 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:08:26,096 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:08:26,097 WARN L227 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-02-06 13:08:26,173 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:08:26,174 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:08:26,545 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:08:26,545 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:08:26,840 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:08:26,840 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:08:26,840 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:08:26 BoogieIcfgContainer [2025-02-06 13:08:26,841 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:08:26,842 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:08:26,842 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:08:26,846 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:08:26,846 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:08:25" (1/3) ... [2025-02-06 13:08:26,847 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7262ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:08:26, skipping insertion in model container [2025-02-06 13:08:26,847 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:08:25" (2/3) ... [2025-02-06 13:08:26,848 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f7262ae and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:08:26, skipping insertion in model container [2025-02-06 13:08:26,848 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:08:26" (3/3) ... [2025-02-06 13:08:26,848 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-more-buffer-series2.wvr.c [2025-02-06 13:08:26,861 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:08:26,862 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-more-buffer-series2.wvr.c that has 5 procedures, 69 locations, 1 initial locations, 7 loop locations, and 22 error locations. [2025-02-06 13:08:26,862 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:08:26,926 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2025-02-06 13:08:26,952 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 75 transitions, 178 flow [2025-02-06 13:08:26,989 INFO L124 PetriNetUnfolderBase]: 7/71 cut-off events. [2025-02-06 13:08:26,994 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-02-06 13:08:26,996 INFO L83 FinitePrefix]: Finished finitePrefix Result has 88 conditions, 71 events. 7/71 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 194 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 58. Up to 2 conditions per place. [2025-02-06 13:08:27,000 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 75 transitions, 178 flow [2025-02-06 13:08:27,003 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 76 places, 70 transitions, 164 flow [2025-02-06 13:08:27,009 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:08:27,020 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;@29c947a7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:08:27,020 INFO L334 AbstractCegarLoop]: Starting to check reachability of 40 error locations. [2025-02-06 13:08:27,024 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:08:27,024 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:08:27,024 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:08:27,024 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:27,024 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:08:27,024 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:27,028 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:27,028 INFO L85 PathProgramCache]: Analyzing trace with hash 930982, now seen corresponding path program 1 times [2025-02-06 13:08:27,032 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:27,034 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1859461097] [2025-02-06 13:08:27,034 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:27,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:27,088 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:08:27,105 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:08:27,105 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:27,105 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:27,206 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:27,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:27,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1859461097] [2025-02-06 13:08:27,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1859461097] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:27,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:27,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:08:27,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037160258] [2025-02-06 13:08:27,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:27,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:08:27,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:27,235 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:08:27,235 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:08:27,252 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 75 [2025-02-06 13:08:27,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 70 transitions, 164 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2025-02-06 13:08:27,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:27,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 75 [2025-02-06 13:08:27,255 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:29,378 INFO L124 PetriNetUnfolderBase]: 19650/26281 cut-off events. [2025-02-06 13:08:29,378 INFO L125 PetriNetUnfolderBase]: For 620/620 co-relation queries the response was YES. [2025-02-06 13:08:29,429 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53041 conditions, 26281 events. 19650/26281 cut-off events. For 620/620 co-relation queries the response was YES. Maximal size of possible extension queue 1505. Compared 162245 event pairs, 16460 based on Foata normal form. 1/16556 useless extension candidates. Maximal degree in co-relation 50128. Up to 25501 conditions per place. [2025-02-06 13:08:29,555 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 49 selfloop transitions, 2 changer transitions 0/63 dead transitions. [2025-02-06 13:08:29,555 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 63 transitions, 252 flow [2025-02-06 13:08:29,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:08:29,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:08:29,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 108 transitions. [2025-02-06 13:08:29,564 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.48 [2025-02-06 13:08:29,565 INFO L175 Difference]: Start difference. First operand has 76 places, 70 transitions, 164 flow. Second operand 3 states and 108 transitions. [2025-02-06 13:08:29,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 63 transitions, 252 flow [2025-02-06 13:08:29,609 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 63 transitions, 236 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-02-06 13:08:29,612 INFO L231 Difference]: Finished difference. Result has 63 places, 63 transitions, 138 flow [2025-02-06 13:08:29,613 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=138, PETRI_PLACES=63, PETRI_TRANSITIONS=63} [2025-02-06 13:08:29,617 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -13 predicate places. [2025-02-06 13:08:29,617 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 63 transitions, 138 flow [2025-02-06 13:08:29,617 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 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) [2025-02-06 13:08:29,617 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:29,618 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:08:29,618 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:08:29,618 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:29,619 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:29,619 INFO L85 PathProgramCache]: Analyzing trace with hash 930983, now seen corresponding path program 1 times [2025-02-06 13:08:29,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:29,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628077593] [2025-02-06 13:08:29,620 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:29,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:29,632 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:08:29,660 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:08:29,663 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:29,664 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:29,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:29,911 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:29,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628077593] [2025-02-06 13:08:29,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1628077593] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:29,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:29,912 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:08:29,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003691030] [2025-02-06 13:08:29,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:29,912 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:08:29,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:29,913 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:08:29,913 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:08:29,929 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 75 [2025-02-06 13:08:29,929 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 63 transitions, 138 flow. Second operand has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2025-02-06 13:08:29,929 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:29,929 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 75 [2025-02-06 13:08:29,929 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:31,370 INFO L124 PetriNetUnfolderBase]: 19651/26284 cut-off events. [2025-02-06 13:08:31,371 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2025-02-06 13:08:31,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52261 conditions, 26284 events. 19651/26284 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 1505. Compared 162336 event pairs, 16460 based on Foata normal form. 0/16555 useless extension candidates. Maximal degree in co-relation 52224. Up to 25514 conditions per place. [2025-02-06 13:08:31,494 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 53 selfloop transitions, 4 changer transitions 0/66 dead transitions. [2025-02-06 13:08:31,494 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 66 transitions, 258 flow [2025-02-06 13:08:31,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:08:31,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:08:31,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 126 transitions. [2025-02-06 13:08:31,496 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42 [2025-02-06 13:08:31,496 INFO L175 Difference]: Start difference. First operand has 63 places, 63 transitions, 138 flow. Second operand 4 states and 126 transitions. [2025-02-06 13:08:31,496 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 66 transitions, 258 flow [2025-02-06 13:08:31,497 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 66 transitions, 254 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:31,498 INFO L231 Difference]: Finished difference. Result has 66 places, 66 transitions, 161 flow [2025-02-06 13:08:31,499 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=134, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=63, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=161, PETRI_PLACES=66, PETRI_TRANSITIONS=66} [2025-02-06 13:08:31,500 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -10 predicate places. [2025-02-06 13:08:31,500 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 66 transitions, 161 flow [2025-02-06 13:08:31,500 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.75) internal successors, (71), 4 states have internal predecessors, (71), 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) [2025-02-06 13:08:31,502 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:31,503 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2025-02-06 13:08:31,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:08:31,503 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:31,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:31,503 INFO L85 PathProgramCache]: Analyzing trace with hash 28862763, now seen corresponding path program 1 times [2025-02-06 13:08:31,504 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:31,504 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777230180] [2025-02-06 13:08:31,504 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:31,504 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:31,514 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 4 statements into 1 equivalence classes. [2025-02-06 13:08:31,527 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 4 of 4 statements. [2025-02-06 13:08:31,527 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:31,528 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:31,736 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:31,736 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:31,736 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777230180] [2025-02-06 13:08:31,736 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777230180] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:31,736 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:31,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:08:31,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995049405] [2025-02-06 13:08:31,736 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:31,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:08:31,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:31,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:08:31,737 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:08:31,753 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 75 [2025-02-06 13:08:31,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 66 transitions, 161 flow. Second operand has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:31,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:31,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 75 [2025-02-06 13:08:31,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:33,350 INFO L124 PetriNetUnfolderBase]: 19652/26287 cut-off events. [2025-02-06 13:08:33,351 INFO L125 PetriNetUnfolderBase]: For 88/88 co-relation queries the response was YES. [2025-02-06 13:08:33,374 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52278 conditions, 26287 events. 19652/26287 cut-off events. For 88/88 co-relation queries the response was YES. Maximal size of possible extension queue 1505. Compared 162337 event pairs, 16460 based on Foata normal form. 0/16557 useless extension candidates. Maximal degree in co-relation 52253. Up to 25513 conditions per place. [2025-02-06 13:08:33,446 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 53 selfloop transitions, 7 changer transitions 0/69 dead transitions. [2025-02-06 13:08:33,446 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 69 transitions, 287 flow [2025-02-06 13:08:33,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:08:33,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:08:33,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 146 transitions. [2025-02-06 13:08:33,449 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3893333333333333 [2025-02-06 13:08:33,449 INFO L175 Difference]: Start difference. First operand has 66 places, 66 transitions, 161 flow. Second operand 5 states and 146 transitions. [2025-02-06 13:08:33,449 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 69 transitions, 287 flow [2025-02-06 13:08:33,449 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 69 transitions, 284 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:08:33,450 INFO L231 Difference]: Finished difference. Result has 71 places, 69 transitions, 195 flow [2025-02-06 13:08:33,450 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=158, PETRI_DIFFERENCE_MINUEND_PLACES=65, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=195, PETRI_PLACES=71, PETRI_TRANSITIONS=69} [2025-02-06 13:08:33,450 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -5 predicate places. [2025-02-06 13:08:33,450 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 69 transitions, 195 flow [2025-02-06 13:08:33,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.8) internal successors, (89), 5 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:33,451 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:33,451 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:08:33,451 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-02-06 13:08:33,451 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:33,451 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:33,451 INFO L85 PathProgramCache]: Analyzing trace with hash 894703267, now seen corresponding path program 1 times [2025-02-06 13:08:33,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:33,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241621143] [2025-02-06 13:08:33,451 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:33,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:33,458 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:08:33,472 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:08:33,472 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:33,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:33,649 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:33,649 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:33,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241621143] [2025-02-06 13:08:33,649 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241621143] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:33,650 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1908348759] [2025-02-06 13:08:33,650 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:33,650 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:33,650 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:33,653 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:08:33,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-02-06 13:08:33,703 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:08:33,712 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:08:33,712 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:33,712 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:33,713 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 13:08:33,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:33,758 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 [2025-02-06 13:08:33,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:33,907 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:33,981 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:33,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1908348759] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:08:33,982 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:08:33,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:08:33,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991463903] [2025-02-06 13:08:33,982 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:08:33,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:08:33,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:33,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:08:33,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:08:34,053 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 75 [2025-02-06 13:08:34,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 69 transitions, 195 flow. Second operand has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:34,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:34,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 75 [2025-02-06 13:08:34,054 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:35,493 INFO L124 PetriNetUnfolderBase]: 19653/26289 cut-off events. [2025-02-06 13:08:35,493 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2025-02-06 13:08:35,520 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52301 conditions, 26289 events. 19653/26289 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 1505. Compared 162360 event pairs, 16460 based on Foata normal form. 0/16562 useless extension candidates. Maximal degree in co-relation 52263. Up to 25514 conditions per place. [2025-02-06 13:08:35,593 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 52 selfloop transitions, 10 changer transitions 0/71 dead transitions. [2025-02-06 13:08:35,593 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 71 transitions, 330 flow [2025-02-06 13:08:35,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:08:35,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:08:35,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2025-02-06 13:08:35,595 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3283333333333333 [2025-02-06 13:08:35,595 INFO L175 Difference]: Start difference. First operand has 71 places, 69 transitions, 195 flow. Second operand 8 states and 197 transitions. [2025-02-06 13:08:35,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 71 transitions, 330 flow [2025-02-06 13:08:35,596 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 71 transitions, 329 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:08:35,596 INFO L231 Difference]: Finished difference. Result has 76 places, 71 transitions, 225 flow [2025-02-06 13:08:35,596 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=225, PETRI_PLACES=76, PETRI_TRANSITIONS=71} [2025-02-06 13:08:35,597 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 0 predicate places. [2025-02-06 13:08:35,597 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 71 transitions, 225 flow [2025-02-06 13:08:35,597 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 18.363636363636363) internal successors, (202), 11 states have internal predecessors, (202), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:35,597 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:35,597 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2025-02-06 13:08:35,605 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-02-06 13:08:35,801 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:35,802 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:35,802 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:35,802 INFO L85 PathProgramCache]: Analyzing trace with hash 894746212, now seen corresponding path program 1 times [2025-02-06 13:08:35,803 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:35,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795495496] [2025-02-06 13:08:35,803 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:35,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:35,812 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:08:35,822 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:08:35,823 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:35,823 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:35,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:35,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:35,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795495496] [2025-02-06 13:08:35,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1795495496] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:35,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:35,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:08:35,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394649781] [2025-02-06 13:08:35,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:35,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:08:35,960 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:35,960 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:08:35,960 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:08:35,983 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 75 [2025-02-06 13:08:35,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 71 transitions, 225 flow. Second operand has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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) [2025-02-06 13:08:35,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:35,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 75 [2025-02-06 13:08:35,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:37,918 INFO L124 PetriNetUnfolderBase]: 19654/26292 cut-off events. [2025-02-06 13:08:37,918 INFO L125 PetriNetUnfolderBase]: For 94/94 co-relation queries the response was YES. [2025-02-06 13:08:37,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52317 conditions, 26292 events. 19654/26292 cut-off events. For 94/94 co-relation queries the response was YES. Maximal size of possible extension queue 1505. Compared 162324 event pairs, 16460 based on Foata normal form. 0/16564 useless extension candidates. Maximal degree in co-relation 52271. Up to 25518 conditions per place. [2025-02-06 13:08:38,102 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 56 selfloop transitions, 9 changer transitions 0/74 dead transitions. [2025-02-06 13:08:38,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 361 flow [2025-02-06 13:08:38,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:08:38,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:08:38,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 145 transitions. [2025-02-06 13:08:38,104 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38666666666666666 [2025-02-06 13:08:38,104 INFO L175 Difference]: Start difference. First operand has 76 places, 71 transitions, 225 flow. Second operand 5 states and 145 transitions. [2025-02-06 13:08:38,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 361 flow [2025-02-06 13:08:38,106 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 74 transitions, 314 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-02-06 13:08:38,109 INFO L231 Difference]: Finished difference. Result has 74 places, 74 transitions, 221 flow [2025-02-06 13:08:38,109 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=71, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=221, PETRI_PLACES=74, PETRI_TRANSITIONS=74} [2025-02-06 13:08:38,110 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, -2 predicate places. [2025-02-06 13:08:38,110 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 74 transitions, 221 flow [2025-02-06 13:08:38,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 18.0) internal successors, (90), 5 states have internal predecessors, (90), 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) [2025-02-06 13:08:38,110 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:38,110 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2025-02-06 13:08:38,111 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 13:08:38,111 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:38,111 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:38,111 INFO L85 PathProgramCache]: Analyzing trace with hash 1967341347, now seen corresponding path program 1 times [2025-02-06 13:08:38,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:38,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614714692] [2025-02-06 13:08:38,111 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:38,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:38,119 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:08:38,130 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:08:38,130 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:38,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:38,308 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:38,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:38,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614714692] [2025-02-06 13:08:38,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614714692] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:38,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284222640] [2025-02-06 13:08:38,309 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:38,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:38,309 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:38,311 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:08:38,313 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-02-06 13:08:38,358 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-02-06 13:08:38,372 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-02-06 13:08:38,372 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:38,372 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:38,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-02-06 13:08:38,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:38,388 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 [2025-02-06 13:08:38,595 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:38,596 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:38,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:38,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1284222640] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:08:38,693 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:08:38,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-06 13:08:38,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1763155249] [2025-02-06 13:08:38,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:08:38,694 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:08:38,694 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:38,694 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:08:38,694 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:08:38,785 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 75 [2025-02-06 13:08:38,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 74 transitions, 221 flow. Second operand has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 13 states have internal predecessors, (238), 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) [2025-02-06 13:08:38,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:38,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 75 [2025-02-06 13:08:38,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:40,120 INFO L124 PetriNetUnfolderBase]: 19655/26294 cut-off events. [2025-02-06 13:08:40,120 INFO L125 PetriNetUnfolderBase]: For 96/96 co-relation queries the response was YES. [2025-02-06 13:08:40,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52319 conditions, 26294 events. 19655/26294 cut-off events. For 96/96 co-relation queries the response was YES. Maximal size of possible extension queue 1505. Compared 162508 event pairs, 16460 based on Foata normal form. 0/16569 useless extension candidates. Maximal degree in co-relation 52267. Up to 25509 conditions per place. [2025-02-06 13:08:40,293 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 49 selfloop transitions, 18 changer transitions 0/76 dead transitions. [2025-02-06 13:08:40,293 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 76 transitions, 366 flow [2025-02-06 13:08:40,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:08:40,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:08:40,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 219 transitions. [2025-02-06 13:08:40,298 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3244444444444444 [2025-02-06 13:08:40,298 INFO L175 Difference]: Start difference. First operand has 74 places, 74 transitions, 221 flow. Second operand 9 states and 219 transitions. [2025-02-06 13:08:40,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 76 transitions, 366 flow [2025-02-06 13:08:40,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 76 transitions, 358 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:40,300 INFO L231 Difference]: Finished difference. Result has 79 places, 76 transitions, 260 flow [2025-02-06 13:08:40,300 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=210, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=73, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=260, PETRI_PLACES=79, PETRI_TRANSITIONS=76} [2025-02-06 13:08:40,300 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2025-02-06 13:08:40,300 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 76 transitions, 260 flow [2025-02-06 13:08:40,300 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.307692307692307) internal successors, (238), 13 states have internal predecessors, (238), 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) [2025-02-06 13:08:40,300 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:40,301 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2025-02-06 13:08:40,310 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-02-06 13:08:40,501 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:40,502 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:40,502 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:40,502 INFO L85 PathProgramCache]: Analyzing trace with hash 857678836, now seen corresponding path program 1 times [2025-02-06 13:08:40,502 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:40,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528160995] [2025-02-06 13:08:40,503 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:40,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:40,510 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 13:08:40,518 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 13:08:40,519 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:40,519 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:40,682 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:40,683 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:40,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528160995] [2025-02-06 13:08:40,683 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528160995] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:40,683 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1351580285] [2025-02-06 13:08:40,683 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:40,683 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:40,683 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:40,688 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:08:40,689 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-02-06 13:08:40,735 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 13:08:40,761 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 13:08:40,761 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:40,761 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:40,763 INFO L256 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 13:08:40,764 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:40,782 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 [2025-02-06 13:08:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:40,880 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:40,987 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:40,987 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1351580285] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:08:40,987 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:08:40,987 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-02-06 13:08:40,987 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990817587] [2025-02-06 13:08:40,988 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:08:40,988 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-02-06 13:08:40,988 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:40,988 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-02-06 13:08:40,988 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-02-06 13:08:41,065 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 75 [2025-02-06 13:08:41,065 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 260 flow. Second operand has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 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) [2025-02-06 13:08:41,065 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:41,065 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 75 [2025-02-06 13:08:41,065 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:42,758 INFO L124 PetriNetUnfolderBase]: 19655/26293 cut-off events. [2025-02-06 13:08:42,758 INFO L125 PetriNetUnfolderBase]: For 95/95 co-relation queries the response was YES. [2025-02-06 13:08:42,784 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52330 conditions, 26293 events. 19655/26293 cut-off events. For 95/95 co-relation queries the response was YES. Maximal size of possible extension queue 1505. Compared 162280 event pairs, 16460 based on Foata normal form. 0/16569 useless extension candidates. Maximal degree in co-relation 52275. Up to 25510 conditions per place. [2025-02-06 13:08:42,859 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 47 selfloop transitions, 19 changer transitions 0/75 dead transitions. [2025-02-06 13:08:42,859 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 75 transitions, 388 flow [2025-02-06 13:08:42,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:08:42,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:08:42,860 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2025-02-06 13:08:42,860 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.33714285714285713 [2025-02-06 13:08:42,860 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 260 flow. Second operand 7 states and 177 transitions. [2025-02-06 13:08:42,861 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 75 transitions, 388 flow [2025-02-06 13:08:42,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 75 transitions, 355 flow, removed 6 selfloop flow, removed 5 redundant places. [2025-02-06 13:08:42,862 INFO L231 Difference]: Finished difference. Result has 79 places, 75 transitions, 261 flow [2025-02-06 13:08:42,862 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=223, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=261, PETRI_PLACES=79, PETRI_TRANSITIONS=75} [2025-02-06 13:08:42,863 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2025-02-06 13:08:42,863 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 75 transitions, 261 flow [2025-02-06 13:08:42,863 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 18.46153846153846) internal successors, (240), 13 states have internal predecessors, (240), 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) [2025-02-06 13:08:42,863 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:42,863 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:42,869 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-02-06 13:08:43,067 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:43,067 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:43,068 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:43,068 INFO L85 PathProgramCache]: Analyzing trace with hash -325907781, now seen corresponding path program 1 times [2025-02-06 13:08:43,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:43,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [547096603] [2025-02-06 13:08:43,068 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:43,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:43,073 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-02-06 13:08:43,081 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-02-06 13:08:43,081 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:43,081 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:43,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:08:43,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:43,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [547096603] [2025-02-06 13:08:43,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [547096603] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:43,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:43,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:08:43,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320799436] [2025-02-06 13:08:43,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:43,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:08:43,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:43,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:08:43,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:08:43,155 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 75 [2025-02-06 13:08:43,155 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 75 transitions, 261 flow. Second operand has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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) [2025-02-06 13:08:43,156 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:43,156 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 75 [2025-02-06 13:08:43,156 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:44,436 INFO L124 PetriNetUnfolderBase]: 22948/30974 cut-off events. [2025-02-06 13:08:44,436 INFO L125 PetriNetUnfolderBase]: For 116/116 co-relation queries the response was YES. [2025-02-06 13:08:44,500 INFO L83 FinitePrefix]: Finished finitePrefix Result has 61676 conditions, 30974 events. 22948/30974 cut-off events. For 116/116 co-relation queries the response was YES. Maximal size of possible extension queue 1711. Compared 195733 event pairs, 19427 based on Foata normal form. 719/20987 useless extension candidates. Maximal degree in co-relation 52285. Up to 25522 conditions per place. [2025-02-06 13:08:44,606 INFO L140 encePairwiseOnDemand]: 60/75 looper letters, 104 selfloop transitions, 8 changer transitions 0/121 dead transitions. [2025-02-06 13:08:44,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 121 transitions, 641 flow [2025-02-06 13:08:44,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:08:44,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:08:44,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 205 transitions. [2025-02-06 13:08:44,607 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5466666666666666 [2025-02-06 13:08:44,607 INFO L175 Difference]: Start difference. First operand has 79 places, 75 transitions, 261 flow. Second operand 5 states and 205 transitions. [2025-02-06 13:08:44,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 121 transitions, 641 flow [2025-02-06 13:08:44,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 121 transitions, 577 flow, removed 6 selfloop flow, removed 6 redundant places. [2025-02-06 13:08:44,609 INFO L231 Difference]: Finished difference. Result has 79 places, 80 transitions, 296 flow [2025-02-06 13:08:44,610 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=222, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=296, PETRI_PLACES=79, PETRI_TRANSITIONS=80} [2025-02-06 13:08:44,610 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2025-02-06 13:08:44,610 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 80 transitions, 296 flow [2025-02-06 13:08:44,610 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 21.75) internal successors, (87), 4 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) [2025-02-06 13:08:44,610 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:44,610 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:44,611 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 13:08:44,611 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:44,611 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:44,611 INFO L85 PathProgramCache]: Analyzing trace with hash -959545417, now seen corresponding path program 1 times [2025-02-06 13:08:44,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:44,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416735956] [2025-02-06 13:08:44,611 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:44,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:44,616 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:08:44,621 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:08:44,621 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:44,621 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:44,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:08:44,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:44,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416735956] [2025-02-06 13:08:44,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416735956] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:44,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:44,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:08:44,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783278101] [2025-02-06 13:08:44,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:44,713 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:08:44,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:44,714 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:08:44,714 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:08:44,740 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 75 [2025-02-06 13:08:44,740 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 80 transitions, 296 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2025-02-06 13:08:44,740 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:44,740 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 75 [2025-02-06 13:08:44,740 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:45,796 INFO L124 PetriNetUnfolderBase]: 17766/24056 cut-off events. [2025-02-06 13:08:45,796 INFO L125 PetriNetUnfolderBase]: For 1550/1550 co-relation queries the response was YES. [2025-02-06 13:08:45,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51909 conditions, 24056 events. 17766/24056 cut-off events. For 1550/1550 co-relation queries the response was YES. Maximal size of possible extension queue 1283. Compared 148827 event pairs, 14876 based on Foata normal form. 0/16687 useless extension candidates. Maximal degree in co-relation 42544. Up to 23314 conditions per place. [2025-02-06 13:08:45,897 INFO L140 encePairwiseOnDemand]: 70/75 looper letters, 62 selfloop transitions, 7 changer transitions 0/78 dead transitions. [2025-02-06 13:08:45,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 78 transitions, 426 flow [2025-02-06 13:08:45,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:08:45,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:08:45,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 136 transitions. [2025-02-06 13:08:45,898 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3626666666666667 [2025-02-06 13:08:45,898 INFO L175 Difference]: Start difference. First operand has 79 places, 80 transitions, 296 flow. Second operand 5 states and 136 transitions. [2025-02-06 13:08:45,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 78 transitions, 426 flow [2025-02-06 13:08:45,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 78 transitions, 421 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:45,903 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 297 flow [2025-02-06 13:08:45,903 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=297, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2025-02-06 13:08:45,904 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2025-02-06 13:08:45,904 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 297 flow [2025-02-06 13:08:45,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2025-02-06 13:08:45,904 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:45,904 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:45,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-06 13:08:45,904 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:45,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:45,904 INFO L85 PathProgramCache]: Analyzing trace with hash -959545415, now seen corresponding path program 1 times [2025-02-06 13:08:45,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:45,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [59912922] [2025-02-06 13:08:45,905 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:45,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:45,910 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:08:45,913 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:08:45,913 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:45,913 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:45,950 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-02-06 13:08:45,950 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:45,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [59912922] [2025-02-06 13:08:45,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [59912922] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:45,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:45,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:08:45,951 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79382183] [2025-02-06 13:08:45,951 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:45,951 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:08:45,951 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:45,951 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:08:45,952 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:08:45,972 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 75 [2025-02-06 13:08:45,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 297 flow. Second operand has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2025-02-06 13:08:45,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:45,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 75 [2025-02-06 13:08:45,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:46,753 INFO L124 PetriNetUnfolderBase]: 13852/18794 cut-off events. [2025-02-06 13:08:46,753 INFO L125 PetriNetUnfolderBase]: For 1263/1263 co-relation queries the response was YES. [2025-02-06 13:08:46,790 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40254 conditions, 18794 events. 13852/18794 cut-off events. For 1263/1263 co-relation queries the response was YES. Maximal size of possible extension queue 954. Compared 112197 event pairs, 11474 based on Foata normal form. 0/13696 useless extension candidates. Maximal degree in co-relation 31972. Up to 18210 conditions per place. [2025-02-06 13:08:46,860 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 63 selfloop transitions, 4 changer transitions 0/76 dead transitions. [2025-02-06 13:08:46,860 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 76 transitions, 425 flow [2025-02-06 13:08:46,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:08:46,860 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:08:46,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 117 transitions. [2025-02-06 13:08:46,862 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39 [2025-02-06 13:08:46,862 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 297 flow. Second operand 4 states and 117 transitions. [2025-02-06 13:08:46,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 76 transitions, 425 flow [2025-02-06 13:08:46,866 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 76 transitions, 414 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:08:46,867 INFO L231 Difference]: Finished difference. Result has 77 places, 76 transitions, 288 flow [2025-02-06 13:08:46,867 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=288, PETRI_PLACES=77, PETRI_TRANSITIONS=76} [2025-02-06 13:08:46,869 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 1 predicate places. [2025-02-06 13:08:46,869 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 76 transitions, 288 flow [2025-02-06 13:08:46,869 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.25) internal successors, (77), 4 states have internal predecessors, (77), 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) [2025-02-06 13:08:46,869 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:46,869 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:46,869 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-06 13:08:46,869 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:46,870 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:46,870 INFO L85 PathProgramCache]: Analyzing trace with hash -24663497, now seen corresponding path program 1 times [2025-02-06 13:08:46,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:46,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [172389059] [2025-02-06 13:08:46,870 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:46,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:46,877 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:08:46,881 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:08:46,882 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:46,882 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:46,928 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:46,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:46,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [172389059] [2025-02-06 13:08:46,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [172389059] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:46,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:46,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:08:46,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789631723] [2025-02-06 13:08:46,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:46,929 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:08:46,929 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:46,930 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:08:46,930 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:08:46,936 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 75 [2025-02-06 13:08:46,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 76 transitions, 288 flow. Second operand has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:46,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:46,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 75 [2025-02-06 13:08:46,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:47,930 INFO L124 PetriNetUnfolderBase]: 16625/22927 cut-off events. [2025-02-06 13:08:47,930 INFO L125 PetriNetUnfolderBase]: For 1511/1511 co-relation queries the response was YES. [2025-02-06 13:08:47,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49158 conditions, 22927 events. 16625/22927 cut-off events. For 1511/1511 co-relation queries the response was YES. Maximal size of possible extension queue 1042. Compared 142011 event pairs, 13961 based on Foata normal form. 496/18253 useless extension candidates. Maximal degree in co-relation 31974. Up to 18240 conditions per place. [2025-02-06 13:08:48,048 INFO L140 encePairwiseOnDemand]: 65/75 looper letters, 97 selfloop transitions, 6 changer transitions 0/112 dead transitions. [2025-02-06 13:08:48,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 112 transitions, 618 flow [2025-02-06 13:08:48,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:08:48,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:08:48,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 168 transitions. [2025-02-06 13:08:48,051 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.56 [2025-02-06 13:08:48,051 INFO L175 Difference]: Start difference. First operand has 77 places, 76 transitions, 288 flow. Second operand 4 states and 168 transitions. [2025-02-06 13:08:48,051 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 112 transitions, 618 flow [2025-02-06 13:08:48,053 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 112 transitions, 610 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:48,054 INFO L231 Difference]: Finished difference. Result has 79 places, 76 transitions, 310 flow [2025-02-06 13:08:48,054 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=283, PETRI_DIFFERENCE_MINUEND_PLACES=75, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=310, PETRI_PLACES=79, PETRI_TRANSITIONS=76} [2025-02-06 13:08:48,054 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2025-02-06 13:08:48,054 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 76 transitions, 310 flow [2025-02-06 13:08:48,055 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 22.25) internal successors, (89), 4 states have internal predecessors, (89), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:48,055 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:48,055 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:48,055 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-06 13:08:48,055 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:48,055 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:48,055 INFO L85 PathProgramCache]: Analyzing trace with hash -959545416, now seen corresponding path program 1 times [2025-02-06 13:08:48,055 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:48,055 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120978224] [2025-02-06 13:08:48,055 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:48,055 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:48,060 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:08:48,064 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:08:48,065 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:48,065 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:48,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:48,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:48,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120978224] [2025-02-06 13:08:48,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [120978224] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:48,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [843510567] [2025-02-06 13:08:48,203 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:48,203 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:48,203 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:48,205 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:08:48,206 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-02-06 13:08:48,248 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:08:48,262 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:08:48,262 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:48,262 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:48,263 INFO L256 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-02-06 13:08:48,264 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:48,270 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-02-06 13:08:48,308 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:08:48,309 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2025-02-06 13:08:48,324 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-02-06 13:08:48,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-02-06 13:08:48,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-02-06 13:08:48,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2025-02-06 13:08:48,348 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-02-06 13:08:48,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-02-06 13:08:48,370 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:48,370 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-02-06 13:08:48,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [843510567] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:48,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-02-06 13:08:48,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 8 [2025-02-06 13:08:48,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [479135386] [2025-02-06 13:08:48,371 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:48,371 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:08:48,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:48,371 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:08:48,371 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2025-02-06 13:08:48,395 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 75 [2025-02-06 13:08:48,396 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 76 transitions, 310 flow. Second operand has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 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) [2025-02-06 13:08:48,396 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:48,396 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 75 [2025-02-06 13:08:48,396 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:49,110 INFO L124 PetriNetUnfolderBase]: 12389/17187 cut-off events. [2025-02-06 13:08:49,111 INFO L125 PetriNetUnfolderBase]: For 2201/2201 co-relation queries the response was YES. [2025-02-06 13:08:49,136 INFO L83 FinitePrefix]: Finished finitePrefix Result has 39229 conditions, 17187 events. 12389/17187 cut-off events. For 2201/2201 co-relation queries the response was YES. Maximal size of possible extension queue 798. Compared 103941 event pairs, 10265 based on Foata normal form. 0/14008 useless extension candidates. Maximal degree in co-relation 23393. Up to 16596 conditions per place. [2025-02-06 13:08:49,189 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 61 selfloop transitions, 4 changer transitions 0/74 dead transitions. [2025-02-06 13:08:49,190 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 74 transitions, 432 flow [2025-02-06 13:08:49,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:08:49,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:08:49,190 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 115 transitions. [2025-02-06 13:08:49,191 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38333333333333336 [2025-02-06 13:08:49,191 INFO L175 Difference]: Start difference. First operand has 79 places, 76 transitions, 310 flow. Second operand 4 states and 115 transitions. [2025-02-06 13:08:49,191 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 74 transitions, 432 flow [2025-02-06 13:08:49,193 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 74 transitions, 427 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:08:49,194 INFO L231 Difference]: Finished difference. Result has 79 places, 74 transitions, 305 flow [2025-02-06 13:08:49,194 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=76, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=305, PETRI_PLACES=79, PETRI_TRANSITIONS=74} [2025-02-06 13:08:49,195 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 3 predicate places. [2025-02-06 13:08:49,195 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 74 transitions, 305 flow [2025-02-06 13:08:49,195 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.5) internal successors, (111), 6 states have internal predecessors, (111), 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) [2025-02-06 13:08:49,195 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:49,195 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:49,201 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-02-06 13:08:49,395 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2025-02-06 13:08:49,396 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:49,396 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:49,396 INFO L85 PathProgramCache]: Analyzing trace with hash -959545414, now seen corresponding path program 1 times [2025-02-06 13:08:49,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:49,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1020428886] [2025-02-06 13:08:49,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:49,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:49,402 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-02-06 13:08:49,407 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-02-06 13:08:49,407 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:49,407 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:49,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:08:49,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:49,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1020428886] [2025-02-06 13:08:49,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1020428886] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:49,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:49,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:08:49,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162156345] [2025-02-06 13:08:49,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:49,488 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:08:49,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:49,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:08:49,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:08:49,500 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 75 [2025-02-06 13:08:49,500 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 74 transitions, 305 flow. Second operand has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 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) [2025-02-06 13:08:49,500 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:49,500 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 75 [2025-02-06 13:08:49,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:50,949 INFO L124 PetriNetUnfolderBase]: 23723/32815 cut-off events. [2025-02-06 13:08:50,950 INFO L125 PetriNetUnfolderBase]: For 3484/3484 co-relation queries the response was YES. [2025-02-06 13:08:51,011 INFO L83 FinitePrefix]: Finished finitePrefix Result has 74329 conditions, 32815 events. 23723/32815 cut-off events. For 3484/3484 co-relation queries the response was YES. Maximal size of possible extension queue 1518. Compared 214231 event pairs, 14289 based on Foata normal form. 0/26446 useless extension candidates. Maximal degree in co-relation 48942. Up to 20274 conditions per place. [2025-02-06 13:08:51,116 INFO L140 encePairwiseOnDemand]: 69/75 looper letters, 111 selfloop transitions, 11 changer transitions 0/130 dead transitions. [2025-02-06 13:08:51,117 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 130 transitions, 704 flow [2025-02-06 13:08:51,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:08:51,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:08:51,118 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 220 transitions. [2025-02-06 13:08:51,118 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4888888888888889 [2025-02-06 13:08:51,118 INFO L175 Difference]: Start difference. First operand has 79 places, 74 transitions, 305 flow. Second operand 6 states and 220 transitions. [2025-02-06 13:08:51,118 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 130 transitions, 704 flow [2025-02-06 13:08:51,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 130 transitions, 699 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:51,123 INFO L231 Difference]: Finished difference. Result has 84 places, 75 transitions, 332 flow [2025-02-06 13:08:51,123 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=300, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=74, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=332, PETRI_PLACES=84, PETRI_TRANSITIONS=75} [2025-02-06 13:08:51,124 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 8 predicate places. [2025-02-06 13:08:51,124 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 75 transitions, 332 flow [2025-02-06 13:08:51,124 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 20.666666666666668) internal successors, (124), 6 states have internal predecessors, (124), 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) [2025-02-06 13:08:51,124 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:51,124 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:51,124 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2025-02-06 13:08:51,124 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:51,124 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:51,124 INFO L85 PathProgramCache]: Analyzing trace with hash -977121718, now seen corresponding path program 1 times [2025-02-06 13:08:51,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:51,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570482448] [2025-02-06 13:08:51,124 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:51,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:51,129 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:08:51,135 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:08:51,135 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:51,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:51,263 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:08:51,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:51,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570482448] [2025-02-06 13:08:51,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570482448] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:51,264 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1060218612] [2025-02-06 13:08:51,264 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:51,264 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:51,264 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:51,269 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:08:51,270 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-02-06 13:08:51,345 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:08:51,360 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:08:51,360 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:51,360 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:51,361 INFO L256 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:08:51,362 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:51,422 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:08:51,422 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:51,462 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 [2025-02-06 13:08:51,491 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:08:51,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1060218612] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:08:51,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:08:51,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-02-06 13:08:51,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852860868] [2025-02-06 13:08:51,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:08:51,493 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:08:51,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:51,493 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:08:51,493 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:08:51,581 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 75 [2025-02-06 13:08:51,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 75 transitions, 332 flow. Second operand has 12 states, 12 states have (on average 22.083333333333332) internal successors, (265), 12 states have internal predecessors, (265), 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) [2025-02-06 13:08:51,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:51,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 75 [2025-02-06 13:08:51,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:53,506 INFO L124 PetriNetUnfolderBase]: 24912/34917 cut-off events. [2025-02-06 13:08:53,506 INFO L125 PetriNetUnfolderBase]: For 7851/7851 co-relation queries the response was YES. [2025-02-06 13:08:53,578 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82230 conditions, 34917 events. 24912/34917 cut-off events. For 7851/7851 co-relation queries the response was YES. Maximal size of possible extension queue 1391. Compared 230089 event pairs, 14858 based on Foata normal form. 0/29376 useless extension candidates. Maximal degree in co-relation 58982. Up to 11711 conditions per place. [2025-02-06 13:08:53,691 INFO L140 encePairwiseOnDemand]: 66/75 looper letters, 112 selfloop transitions, 16 changer transitions 0/137 dead transitions. [2025-02-06 13:08:53,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 89 places, 137 transitions, 761 flow [2025-02-06 13:08:53,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:08:53,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:08:53,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 238 transitions. [2025-02-06 13:08:53,692 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5288888888888889 [2025-02-06 13:08:53,693 INFO L175 Difference]: Start difference. First operand has 84 places, 75 transitions, 332 flow. Second operand 6 states and 238 transitions. [2025-02-06 13:08:53,693 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 89 places, 137 transitions, 761 flow [2025-02-06 13:08:53,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 87 places, 137 transitions, 752 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:08:53,704 INFO L231 Difference]: Finished difference. Result has 88 places, 76 transitions, 365 flow [2025-02-06 13:08:53,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=323, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=59, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=365, PETRI_PLACES=88, PETRI_TRANSITIONS=76} [2025-02-06 13:08:53,704 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 12 predicate places. [2025-02-06 13:08:53,704 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 76 transitions, 365 flow [2025-02-06 13:08:53,705 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 22.083333333333332) internal successors, (265), 12 states have internal predecessors, (265), 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) [2025-02-06 13:08:53,705 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:53,705 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:53,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-02-06 13:08:53,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-02-06 13:08:53,905 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:53,906 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:53,906 INFO L85 PathProgramCache]: Analyzing trace with hash 1479978303, now seen corresponding path program 1 times [2025-02-06 13:08:53,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:53,906 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [659729628] [2025-02-06 13:08:53,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:53,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:53,910 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-02-06 13:08:53,915 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-02-06 13:08:53,915 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:53,915 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:53,995 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:53,995 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [659729628] [2025-02-06 13:08:53,995 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [659729628] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:08:53,995 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:08:53,995 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:08:53,995 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981700051] [2025-02-06 13:08:53,995 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:08:53,996 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:08:53,996 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:53,996 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:08:53,996 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:08:54,007 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 19 out of 75 [2025-02-06 13:08:54,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 76 transitions, 365 flow. Second operand has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:54,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:54,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 19 of 75 [2025-02-06 13:08:54,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:08:56,777 INFO L124 PetriNetUnfolderBase]: 35130/47683 cut-off events. [2025-02-06 13:08:56,777 INFO L125 PetriNetUnfolderBase]: For 13211/13211 co-relation queries the response was YES. [2025-02-06 13:08:56,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116496 conditions, 47683 events. 35130/47683 cut-off events. For 13211/13211 co-relation queries the response was YES. Maximal size of possible extension queue 1591. Compared 300948 event pairs, 12682 based on Foata normal form. 0/38749 useless extension candidates. Maximal degree in co-relation 89467. Up to 18368 conditions per place. [2025-02-06 13:08:57,077 INFO L140 encePairwiseOnDemand]: 67/75 looper letters, 174 selfloop transitions, 14 changer transitions 0/196 dead transitions. [2025-02-06 13:08:57,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 196 transitions, 1101 flow [2025-02-06 13:08:57,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-02-06 13:08:57,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-02-06 13:08:57,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 320 transitions. [2025-02-06 13:08:57,079 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2025-02-06 13:08:57,079 INFO L175 Difference]: Start difference. First operand has 88 places, 76 transitions, 365 flow. Second operand 8 states and 320 transitions. [2025-02-06 13:08:57,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 196 transitions, 1101 flow [2025-02-06 13:08:57,103 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 196 transitions, 1070 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:08:57,105 INFO L231 Difference]: Finished difference. Result has 95 places, 80 transitions, 397 flow [2025-02-06 13:08:57,109 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=397, PETRI_PLACES=95, PETRI_TRANSITIONS=80} [2025-02-06 13:08:57,109 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 19 predicate places. [2025-02-06 13:08:57,110 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 80 transitions, 397 flow [2025-02-06 13:08:57,110 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 21.0) internal successors, (126), 6 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:57,110 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:08:57,110 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:08:57,110 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-02-06 13:08:57,110 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:08:57,110 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:08:57,110 INFO L85 PathProgramCache]: Analyzing trace with hash 1034814671, now seen corresponding path program 1 times [2025-02-06 13:08:57,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:08:57,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1738068072] [2025-02-06 13:08:57,110 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:57,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:08:57,123 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 13:08:57,131 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 13:08:57,131 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:57,131 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:57,293 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:57,294 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:08:57,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1738068072] [2025-02-06 13:08:57,294 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1738068072] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:08:57,294 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [79313265] [2025-02-06 13:08:57,294 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:08:57,294 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:08:57,294 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:08:57,297 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:08:57,298 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-02-06 13:08:57,350 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 13:08:57,371 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 13:08:57,371 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:08:57,371 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:08:57,373 INFO L256 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-02-06 13:08:57,374 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:08:57,448 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:57,448 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:08:57,497 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 [2025-02-06 13:08:57,528 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:08:57,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [79313265] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:08:57,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:08:57,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-02-06 13:08:57,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1120105882] [2025-02-06 13:08:57,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:08:57,529 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:08:57,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:08:57,530 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:08:57,530 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=96, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:08:57,601 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 75 [2025-02-06 13:08:57,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 80 transitions, 397 flow. Second operand has 12 states, 12 states have (on average 22.583333333333332) internal successors, (271), 12 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:08:57,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:08:57,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 75 [2025-02-06 13:08:57,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:00,384 INFO L124 PetriNetUnfolderBase]: 28364/39714 cut-off events. [2025-02-06 13:09:00,384 INFO L125 PetriNetUnfolderBase]: For 18985/18985 co-relation queries the response was YES. [2025-02-06 13:09:00,495 INFO L83 FinitePrefix]: Finished finitePrefix Result has 102731 conditions, 39714 events. 28364/39714 cut-off events. For 18985/18985 co-relation queries the response was YES. Maximal size of possible extension queue 1338. Compared 260234 event pairs, 14095 based on Foata normal form. 0/34785 useless extension candidates. Maximal degree in co-relation 77742. Up to 16148 conditions per place. [2025-02-06 13:09:00,783 INFO L140 encePairwiseOnDemand]: 64/75 looper letters, 127 selfloop transitions, 18 changer transitions 0/154 dead transitions. [2025-02-06 13:09:00,784 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 154 transitions, 908 flow [2025-02-06 13:09:00,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-02-06 13:09:00,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-02-06 13:09:00,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 272 transitions. [2025-02-06 13:09:00,785 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.518095238095238 [2025-02-06 13:09:00,785 INFO L175 Difference]: Start difference. First operand has 95 places, 80 transitions, 397 flow. Second operand 7 states and 272 transitions. [2025-02-06 13:09:00,785 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 154 transitions, 908 flow [2025-02-06 13:09:00,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 154 transitions, 899 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:09:00,809 INFO L231 Difference]: Finished difference. Result has 102 places, 82 transitions, 444 flow [2025-02-06 13:09:00,810 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=388, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=444, PETRI_PLACES=102, PETRI_TRANSITIONS=82} [2025-02-06 13:09:00,810 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 26 predicate places. [2025-02-06 13:09:00,810 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 82 transitions, 444 flow [2025-02-06 13:09:00,810 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 22.583333333333332) internal successors, (271), 12 states have internal predecessors, (271), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:09:00,810 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:00,810 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:00,816 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-02-06 13:09:01,011 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-02-06 13:09:01,011 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:09:01,012 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:01,012 INFO L85 PathProgramCache]: Analyzing trace with hash 1034814672, now seen corresponding path program 1 times [2025-02-06 13:09:01,012 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:01,012 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340697313] [2025-02-06 13:09:01,012 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:01,012 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:01,017 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 13:09:01,021 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 13:09:01,021 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:01,021 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:01,074 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-02-06 13:09:01,074 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:01,074 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340697313] [2025-02-06 13:09:01,074 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340697313] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:09:01,074 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:09:01,074 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:09:01,074 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407798103] [2025-02-06 13:09:01,074 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:09:01,075 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:09:01,075 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:01,075 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:09:01,075 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:09:01,093 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 75 [2025-02-06 13:09:01,093 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 82 transitions, 444 flow. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 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) [2025-02-06 13:09:01,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:01,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 75 [2025-02-06 13:09:01,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:03,507 INFO L124 PetriNetUnfolderBase]: 24520/34654 cut-off events. [2025-02-06 13:09:03,511 INFO L125 PetriNetUnfolderBase]: For 26062/26062 co-relation queries the response was YES. [2025-02-06 13:09:03,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93394 conditions, 34654 events. 24520/34654 cut-off events. For 26062/26062 co-relation queries the response was YES. Maximal size of possible extension queue 1163. Compared 228711 event pairs, 20889 based on Foata normal form. 0/31753 useless extension candidates. Maximal degree in co-relation 70278. Up to 33029 conditions per place. [2025-02-06 13:09:03,739 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 62 selfloop transitions, 9 changer transitions 0/80 dead transitions. [2025-02-06 13:09:03,739 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 80 transitions, 573 flow [2025-02-06 13:09:03,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:09:03,740 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:09:03,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2025-02-06 13:09:03,740 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3466666666666667 [2025-02-06 13:09:03,740 INFO L175 Difference]: Start difference. First operand has 102 places, 82 transitions, 444 flow. Second operand 5 states and 130 transitions. [2025-02-06 13:09:03,740 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 80 transitions, 573 flow [2025-02-06 13:09:03,779 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 80 transitions, 547 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:09:03,780 INFO L231 Difference]: Finished difference. Result has 103 places, 80 transitions, 423 flow [2025-02-06 13:09:03,780 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=405, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=423, PETRI_PLACES=103, PETRI_TRANSITIONS=80} [2025-02-06 13:09:03,780 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 27 predicate places. [2025-02-06 13:09:03,780 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 80 transitions, 423 flow [2025-02-06 13:09:03,780 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 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) [2025-02-06 13:09:03,781 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:03,781 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:03,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-02-06 13:09:03,781 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:09:03,781 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:03,781 INFO L85 PathProgramCache]: Analyzing trace with hash 1034814673, now seen corresponding path program 1 times [2025-02-06 13:09:03,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:03,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [898445263] [2025-02-06 13:09:03,781 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:03,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:03,788 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 15 statements into 1 equivalence classes. [2025-02-06 13:09:03,793 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 15 of 15 statements. [2025-02-06 13:09:03,794 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:03,794 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:03,925 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:09:03,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:03,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [898445263] [2025-02-06 13:09:03,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [898445263] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:09:03,925 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:09:03,925 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:09:03,925 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835550299] [2025-02-06 13:09:03,925 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:09:03,926 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:09:03,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:03,926 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:09:03,926 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:09:03,943 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 75 [2025-02-06 13:09:03,943 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 80 transitions, 423 flow. Second operand has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 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) [2025-02-06 13:09:03,943 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:03,943 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 75 [2025-02-06 13:09:03,943 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:09:06,044 INFO L124 PetriNetUnfolderBase]: 18268/26190 cut-off events. [2025-02-06 13:09:06,044 INFO L125 PetriNetUnfolderBase]: For 21945/21945 co-relation queries the response was YES. [2025-02-06 13:09:06,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69087 conditions, 26190 events. 18268/26190 cut-off events. For 21945/21945 co-relation queries the response was YES. Maximal size of possible extension queue 870. Compared 170832 event pairs, 15422 based on Foata normal form. 1031/25696 useless extension candidates. Maximal degree in co-relation 51497. Up to 24812 conditions per place. [2025-02-06 13:09:06,198 INFO L140 encePairwiseOnDemand]: 71/75 looper letters, 60 selfloop transitions, 8 changer transitions 0/77 dead transitions. [2025-02-06 13:09:06,198 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 103 places, 77 transitions, 542 flow [2025-02-06 13:09:06,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:09:06,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:09:06,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 112 transitions. [2025-02-06 13:09:06,199 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37333333333333335 [2025-02-06 13:09:06,199 INFO L175 Difference]: Start difference. First operand has 103 places, 80 transitions, 423 flow. Second operand 4 states and 112 transitions. [2025-02-06 13:09:06,199 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 103 places, 77 transitions, 542 flow [2025-02-06 13:09:06,220 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 77 transitions, 523 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-02-06 13:09:06,225 INFO L231 Difference]: Finished difference. Result has 98 places, 77 transitions, 403 flow [2025-02-06 13:09:06,228 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=75, PETRI_DIFFERENCE_MINUEND_FLOW=387, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=77, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=403, PETRI_PLACES=98, PETRI_TRANSITIONS=77} [2025-02-06 13:09:06,230 INFO L279 CegarLoopForPetriNet]: 76 programPoint places, 22 predicate places. [2025-02-06 13:09:06,230 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 77 transitions, 403 flow [2025-02-06 13:09:06,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.6) internal successors, (98), 5 states have internal predecessors, (98), 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) [2025-02-06 13:09:06,230 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:09:06,230 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:09:06,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-02-06 13:09:06,230 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 37 more)] === [2025-02-06 13:09:06,230 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:09:06,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1856175475, now seen corresponding path program 1 times [2025-02-06 13:09:06,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:09:06,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972354421] [2025-02-06 13:09:06,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:06,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:09:06,241 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 13:09:06,252 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:09:06,258 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:06,259 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:06,367 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:09:06,368 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:09:06,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972354421] [2025-02-06 13:09:06,368 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972354421] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:09:06,368 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1511392089] [2025-02-06 13:09:06,368 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:09:06,368 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:09:06,369 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:09:06,373 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-02-06 13:09:06,374 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-02-06 13:09:06,432 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-02-06 13:09:06,448 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-02-06 13:09:06,449 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:09:06,449 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:09:06,451 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-02-06 13:09:06,451 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:09:06,497 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:09:06,497 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:09:06,542 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:09:06,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1511392089] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:09:06,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:09:06,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-02-06 13:09:06,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668790622] [2025-02-06 13:09:06,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:09:06,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-02-06 13:09:06,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:09:06,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-02-06 13:09:06,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2025-02-06 13:09:06,570 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 75 [2025-02-06 13:09:06,570 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 77 transitions, 403 flow. Second operand has 12 states, 12 states have (on average 22.25) internal successors, (267), 12 states have internal predecessors, (267), 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) [2025-02-06 13:09:06,571 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:09:06,571 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 75 [2025-02-06 13:09:06,571 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand