./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-send-receive.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-send-receive.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 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 --- Real Ultimate output --- This is Ultimate 0.3.0-?-c00e63d-m [2025-02-06 13:11:24,312 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-02-06 13:11:24,388 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-02-06 13:11:24,392 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-02-06 13:11:24,393 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-02-06 13:11:24,420 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-02-06 13:11:24,422 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-02-06 13:11:24,422 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-02-06 13:11:24,422 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-02-06 13:11:24,423 INFO L153 SettingsManager]: * Use memory slicer=true [2025-02-06 13:11:24,423 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-02-06 13:11:24,424 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-02-06 13:11:24,424 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-02-06 13:11:24,424 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-02-06 13:11:24,424 INFO L153 SettingsManager]: * Use SBE=true [2025-02-06 13:11:24,424 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-02-06 13:11:24,424 INFO L153 SettingsManager]: * sizeof long=4 [2025-02-06 13:11:24,425 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-02-06 13:11:24,425 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-02-06 13:11:24,425 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-02-06 13:11:24,425 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-02-06 13:11:24,425 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-02-06 13:11:24,425 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-02-06 13:11:24,425 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-02-06 13:11:24,425 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-02-06 13:11:24,425 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-02-06 13:11:24,425 INFO L153 SettingsManager]: * sizeof long double=12 [2025-02-06 13:11:24,425 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-02-06 13:11:24,425 INFO L153 SettingsManager]: * Use constant arrays=true [2025-02-06 13:11:24,425 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-02-06 13:11:24,426 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-02-06 13:11:24,426 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-02-06 13:11:24,426 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-02-06 13:11:24,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:11:24,426 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-02-06 13:11:24,426 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-02-06 13:11:24,426 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-02-06 13:11:24,426 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-02-06 13:11:24,427 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-02-06 13:11:24,427 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-02-06 13:11:24,427 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-02-06 13:11:24,427 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-02-06 13:11:24,427 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 -> 4eda2bf92bccdcc8638b67653fb7fdefc015ff9c815b317ad1009deb61d04585 [2025-02-06 13:11:24,708 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-02-06 13:11:24,719 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-02-06 13:11:24,721 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-02-06 13:11:24,723 INFO L270 PluginConnector]: Initializing CDTParser... [2025-02-06 13:11:24,724 INFO L274 PluginConnector]: CDTParser initialized [2025-02-06 13:11:24,725 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2025-02-06 13:11:26,030 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/1a7db160b/38f0fbba8dbf4c45be11ba59b3020402/FLAGb2809e574 [2025-02-06 13:11:26,337 INFO L384 CDTParser]: Found 1 translation units. [2025-02-06 13:11:26,338 INFO L180 CDTParser]: Scanning /storage/repos/ultimate-jdk21/releaseScripts/default/sv-benchmarks/c/weaver/popl20-send-receive.wvr.c [2025-02-06 13:11:26,346 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/1a7db160b/38f0fbba8dbf4c45be11ba59b3020402/FLAGb2809e574 [2025-02-06 13:11:26,606 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/data/1a7db160b/38f0fbba8dbf4c45be11ba59b3020402 [2025-02-06 13:11:26,608 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-02-06 13:11:26,609 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-02-06 13:11:26,610 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-02-06 13:11:26,610 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-02-06 13:11:26,613 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-02-06 13:11:26,614 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:11:26" (1/1) ... [2025-02-06 13:11:26,614 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7dba5444 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:26, skipping insertion in model container [2025-02-06 13:11:26,615 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.02 01:11:26" (1/1) ... [2025-02-06 13:11:26,632 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-02-06 13:11:26,811 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 13:11:26,816 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:11:26,828 INFO L200 MainTranslator]: Completed pre-run [2025-02-06 13:11:26,855 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-02-06 13:11:26,870 INFO L204 MainTranslator]: Completed translation [2025-02-06 13:11:26,871 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:26 WrapperNode [2025-02-06 13:11:26,871 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-02-06 13:11:26,872 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-02-06 13:11:26,872 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-02-06 13:11:26,872 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-02-06 13:11:26,879 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:26" (1/1) ... [2025-02-06 13:11:26,889 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:26" (1/1) ... [2025-02-06 13:11:26,919 INFO L138 Inliner]: procedures = 24, calls = 38, calls flagged for inlining = 10, calls inlined = 10, statements flattened = 141 [2025-02-06 13:11:26,919 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-02-06 13:11:26,920 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-02-06 13:11:26,921 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-02-06 13:11:26,921 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-02-06 13:11:26,928 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:26" (1/1) ... [2025-02-06 13:11:26,928 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:26" (1/1) ... [2025-02-06 13:11:26,930 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:26" (1/1) ... [2025-02-06 13:11:26,946 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2025-02-06 13:11:26,947 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:26" (1/1) ... [2025-02-06 13:11:26,947 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:26" (1/1) ... [2025-02-06 13:11:26,958 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:26" (1/1) ... [2025-02-06 13:11:26,959 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:26" (1/1) ... [2025-02-06 13:11:26,960 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:26" (1/1) ... [2025-02-06 13:11:26,961 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:26" (1/1) ... [2025-02-06 13:11:26,967 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-02-06 13:11:26,968 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-02-06 13:11:26,971 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-02-06 13:11:26,972 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-02-06 13:11:26,973 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:26" (1/1) ... [2025-02-06 13:11:26,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-02-06 13:11:26,989 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:27,004 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 13:11:27,008 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 13:11:27,031 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-02-06 13:11:27,031 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-02-06 13:11:27,031 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-02-06 13:11:27,031 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-02-06 13:11:27,031 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-02-06 13:11:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2025-02-06 13:11:27,032 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2025-02-06 13:11:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-02-06 13:11:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-02-06 13:11:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-02-06 13:11:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-02-06 13:11:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2025-02-06 13:11:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2025-02-06 13:11:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-02-06 13:11:27,032 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-02-06 13:11:27,033 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-02-06 13:11:27,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-02-06 13:11:27,033 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-02-06 13:11:27,034 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 13:11:27,119 INFO L257 CfgBuilder]: Building ICFG [2025-02-06 13:11:27,120 INFO L287 CfgBuilder]: Building CFG for each procedure with an implementation [2025-02-06 13:11:27,406 INFO L304 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-02-06 13:11:27,407 INFO L308 CfgBuilder]: Performing block encoding [2025-02-06 13:11:27,605 INFO L332 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-02-06 13:11:27,606 INFO L337 CfgBuilder]: Removed 0 assume(true) statements. [2025-02-06 13:11:27,606 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:11:27 BoogieIcfgContainer [2025-02-06 13:11:27,606 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-02-06 13:11:27,609 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-02-06 13:11:27,609 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-02-06 13:11:27,613 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-02-06 13:11:27,614 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.02 01:11:26" (1/3) ... [2025-02-06 13:11:27,615 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b73e2d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:11:27, skipping insertion in model container [2025-02-06 13:11:27,617 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.02 01:11:26" (2/3) ... [2025-02-06 13:11:27,617 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7b73e2d2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.02 01:11:27, skipping insertion in model container [2025-02-06 13:11:27,617 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 06.02 01:11:27" (3/3) ... [2025-02-06 13:11:27,618 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-send-receive.wvr.c [2025-02-06 13:11:27,634 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-02-06 13:11:27,636 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-send-receive.wvr.c that has 4 procedures, 45 locations, 1 initial locations, 3 loop locations, and 10 error locations. [2025-02-06 13:11:27,637 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-02-06 13:11:27,711 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2025-02-06 13:11:27,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 54 places, 48 transitions, 117 flow [2025-02-06 13:11:27,784 INFO L124 PetriNetUnfolderBase]: 4/45 cut-off events. [2025-02-06 13:11:27,788 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-02-06 13:11:27,791 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58 conditions, 45 events. 4/45 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 96 event pairs, 0 based on Foata normal form. 0/31 useless extension candidates. Maximal degree in co-relation 36. Up to 2 conditions per place. [2025-02-06 13:11:27,791 INFO L82 GeneralOperation]: Start removeDead. Operand has 54 places, 48 transitions, 117 flow [2025-02-06 13:11:27,794 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 50 places, 44 transitions, 106 flow [2025-02-06 13:11:27,800 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-02-06 13:11:27,811 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;@1edb6cb3, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-02-06 13:11:27,811 INFO L334 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2025-02-06 13:11:27,814 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-02-06 13:11:27,814 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-02-06 13:11:27,815 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-02-06 13:11:27,815 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:27,834 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:11:27,834 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:11:27,842 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:27,843 INFO L85 PathProgramCache]: Analyzing trace with hash 387523, now seen corresponding path program 1 times [2025-02-06 13:11:27,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:27,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1962488445] [2025-02-06 13:11:27,851 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:27,851 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:27,922 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:11:27,943 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:11:27,944 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:27,944 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:28,096 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 13:11:28,098 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:28,098 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1962488445] [2025-02-06 13:11:28,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1962488445] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:28,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:28,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:11:28,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1805037978] [2025-02-06 13:11:28,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:28,106 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:11:28,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:28,130 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:11:28,130 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:11:28,142 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-02-06 13:11:28,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 106 flow. Second operand has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:28,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:28,144 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-02-06 13:11:28,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:28,471 INFO L124 PetriNetUnfolderBase]: 1137/1761 cut-off events. [2025-02-06 13:11:28,471 INFO L125 PetriNetUnfolderBase]: For 103/103 co-relation queries the response was YES. [2025-02-06 13:11:28,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3600 conditions, 1761 events. 1137/1761 cut-off events. For 103/103 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9400 event pairs, 952 based on Foata normal form. 1/1245 useless extension candidates. Maximal degree in co-relation 3368. Up to 1664 conditions per place. [2025-02-06 13:11:28,490 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 30 selfloop transitions, 2 changer transitions 0/41 dead transitions. [2025-02-06 13:11:28,490 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 41 transitions, 164 flow [2025-02-06 13:11:28,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:11:28,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:11:28,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 73 transitions. [2025-02-06 13:11:28,502 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5069444444444444 [2025-02-06 13:11:28,504 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 106 flow. Second operand 3 states and 73 transitions. [2025-02-06 13:11:28,505 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 41 transitions, 164 flow [2025-02-06 13:11:28,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 41 transitions, 152 flow, removed 0 selfloop flow, removed 6 redundant places. [2025-02-06 13:11:28,519 INFO L231 Difference]: Finished difference. Result has 43 places, 41 transitions, 92 flow [2025-02-06 13:11:28,521 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=92, PETRI_PLACES=43, PETRI_TRANSITIONS=41} [2025-02-06 13:11:28,526 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -7 predicate places. [2025-02-06 13:11:28,526 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 41 transitions, 92 flow [2025-02-06 13:11:28,526 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 14.0) internal successors, (42), 3 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:28,526 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:28,526 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-02-06 13:11:28,527 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-02-06 13:11:28,527 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:11:28,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:28,528 INFO L85 PathProgramCache]: Analyzing trace with hash 387524, now seen corresponding path program 1 times [2025-02-06 13:11:28,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:28,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818894591] [2025-02-06 13:11:28,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:28,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:28,539 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-02-06 13:11:28,568 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-02-06 13:11:28,570 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:28,570 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:28,853 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 13:11:28,854 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:28,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818894591] [2025-02-06 13:11:28,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1818894591] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:28,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:28,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:11:28,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276204241] [2025-02-06 13:11:28,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:28,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:11:28,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:28,856 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:11:28,856 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:11:28,865 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-02-06 13:11:28,865 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 41 transitions, 92 flow. Second operand has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:28,865 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:28,865 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-02-06 13:11:28,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:29,182 INFO L124 PetriNetUnfolderBase]: 1138/1764 cut-off events. [2025-02-06 13:11:29,183 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-02-06 13:11:29,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3507 conditions, 1764 events. 1138/1764 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9440 event pairs, 952 based on Foata normal form. 0/1247 useless extension candidates. Maximal degree in co-relation 3485. Up to 1669 conditions per place. [2025-02-06 13:11:29,195 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 32 selfloop transitions, 4 changer transitions 0/44 dead transitions. [2025-02-06 13:11:29,196 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 44 transitions, 172 flow [2025-02-06 13:11:29,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:11:29,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:11:29,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 89 transitions. [2025-02-06 13:11:29,197 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4635416666666667 [2025-02-06 13:11:29,197 INFO L175 Difference]: Start difference. First operand has 43 places, 41 transitions, 92 flow. Second operand 4 states and 89 transitions. [2025-02-06 13:11:29,197 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 44 transitions, 172 flow [2025-02-06 13:11:29,198 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 44 transitions, 166 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:11:29,200 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 115 flow [2025-02-06 13:11:29,201 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2025-02-06 13:11:29,201 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2025-02-06 13:11:29,201 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 115 flow [2025-02-06 13:11:29,202 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 13.75) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:29,202 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:29,202 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-02-06 13:11:29,202 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-02-06 13:11:29,202 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:11:29,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:29,202 INFO L85 PathProgramCache]: Analyzing trace with hash 372423298, now seen corresponding path program 1 times [2025-02-06 13:11:29,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:29,203 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241115075] [2025-02-06 13:11:29,203 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:29,203 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:29,209 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:11:29,218 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:11:29,218 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:29,218 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:29,472 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 13:11:29,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:29,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241115075] [2025-02-06 13:11:29,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241115075] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:29,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1300868222] [2025-02-06 13:11:29,474 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:29,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:29,474 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:29,478 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 13:11:29,479 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 13:11:29,547 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-02-06 13:11:29,560 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-02-06 13:11:29,560 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:29,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:29,562 INFO L256 TraceCheckSpWp]: Trace formula consists of 69 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-02-06 13:11:29,565 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:29,623 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 13:11:29,771 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:29,771 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:29,890 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 13:11:29,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1300868222] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:29,891 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:29,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-02-06 13:11:29,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [174121074] [2025-02-06 13:11:29,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:29,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-02-06 13:11:29,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:29,892 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-02-06 13:11:29,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2025-02-06 13:11:29,919 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-02-06 13:11:29,920 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 115 flow. Second operand has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:29,920 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:29,920 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-02-06 13:11:29,920 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:30,360 INFO L124 PetriNetUnfolderBase]: 1138/1763 cut-off events. [2025-02-06 13:11:30,361 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-02-06 13:11:30,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3514 conditions, 1763 events. 1138/1763 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 135. Compared 9415 event pairs, 952 based on Foata normal form. 0/1246 useless extension candidates. Maximal degree in co-relation 3492. Up to 1665 conditions per place. [2025-02-06 13:11:30,371 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 28 selfloop transitions, 7 changer transitions 0/43 dead transitions. [2025-02-06 13:11:30,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 43 transitions, 181 flow [2025-02-06 13:11:30,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:11:30,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:11:30,375 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 114 transitions. [2025-02-06 13:11:30,375 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.3958333333333333 [2025-02-06 13:11:30,375 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 115 flow. Second operand 6 states and 114 transitions. [2025-02-06 13:11:30,375 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 43 transitions, 181 flow [2025-02-06 13:11:30,376 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 43 transitions, 178 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:11:30,376 INFO L231 Difference]: Finished difference. Result has 49 places, 43 transitions, 122 flow [2025-02-06 13:11:30,376 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=108, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=122, PETRI_PLACES=49, PETRI_TRANSITIONS=43} [2025-02-06 13:11:30,377 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -1 predicate places. [2025-02-06 13:11:30,377 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 43 transitions, 122 flow [2025-02-06 13:11:30,377 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.363636363636363) internal successors, (158), 11 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:30,377 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:30,377 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:30,387 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 13:11:30,578 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:30,578 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:11:30,578 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:30,578 INFO L85 PathProgramCache]: Analyzing trace with hash 1488184725, now seen corresponding path program 1 times [2025-02-06 13:11:30,579 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:30,579 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173754958] [2025-02-06 13:11:30,579 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:30,579 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:30,585 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 7 statements into 1 equivalence classes. [2025-02-06 13:11:30,589 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 7 of 7 statements. [2025-02-06 13:11:30,590 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:30,590 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:30,644 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 13:11:30,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:30,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173754958] [2025-02-06 13:11:30,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173754958] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:30,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:30,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-02-06 13:11:30,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464133510] [2025-02-06 13:11:30,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:30,646 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:11:30,646 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:30,646 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:11:30,647 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:11:30,647 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-02-06 13:11:30,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 43 transitions, 122 flow. Second operand has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:30,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:30,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-02-06 13:11:30,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:30,886 INFO L124 PetriNetUnfolderBase]: 1377/2215 cut-off events. [2025-02-06 13:11:30,886 INFO L125 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2025-02-06 13:11:30,889 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4361 conditions, 2215 events. 1377/2215 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 125. Compared 11946 event pairs, 580 based on Foata normal form. 73/1679 useless extension candidates. Maximal degree in co-relation 4335. Up to 1376 conditions per place. [2025-02-06 13:11:30,900 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 50 selfloop transitions, 3 changer transitions 0/61 dead transitions. [2025-02-06 13:11:30,900 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 61 transitions, 268 flow [2025-02-06 13:11:30,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:11:30,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:11:30,901 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 95 transitions. [2025-02-06 13:11:30,901 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6597222222222222 [2025-02-06 13:11:30,902 INFO L175 Difference]: Start difference. First operand has 49 places, 43 transitions, 122 flow. Second operand 3 states and 95 transitions. [2025-02-06 13:11:30,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 61 transitions, 268 flow [2025-02-06 13:11:30,903 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 238 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-02-06 13:11:30,905 INFO L231 Difference]: Finished difference. Result has 45 places, 45 transitions, 115 flow [2025-02-06 13:11:30,905 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=43, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=115, PETRI_PLACES=45, PETRI_TRANSITIONS=45} [2025-02-06 13:11:30,906 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2025-02-06 13:11:30,906 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 45 transitions, 115 flow [2025-02-06 13:11:30,906 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 15.666666666666666) internal successors, (47), 3 states have internal predecessors, (47), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:30,906 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:30,906 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:30,906 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-02-06 13:11:30,907 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:11:30,907 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:30,907 INFO L85 PathProgramCache]: Analyzing trace with hash 1982287333, now seen corresponding path program 1 times [2025-02-06 13:11:30,907 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:30,907 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682319437] [2025-02-06 13:11:30,908 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:30,908 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:30,914 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:11:30,922 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:11:30,923 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:30,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:31,004 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 13:11:31,004 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:31,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682319437] [2025-02-06 13:11:31,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682319437] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:31,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:31,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-02-06 13:11:31,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499004889] [2025-02-06 13:11:31,007 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:31,008 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:11:31,008 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:31,008 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:11:31,008 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:11:31,019 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 48 [2025-02-06 13:11:31,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 45 transitions, 115 flow. Second operand has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 13:11:31,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:31,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 48 [2025-02-06 13:11:31,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:31,209 INFO L124 PetriNetUnfolderBase]: 957/1498 cut-off events. [2025-02-06 13:11:31,210 INFO L125 PetriNetUnfolderBase]: For 165/165 co-relation queries the response was YES. [2025-02-06 13:11:31,212 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3271 conditions, 1498 events. 957/1498 cut-off events. For 165/165 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7142 event pairs, 794 based on Foata normal form. 0/1282 useless extension candidates. Maximal degree in co-relation 1104. Up to 1418 conditions per place. [2025-02-06 13:11:31,219 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 31 selfloop transitions, 3 changer transitions 0/42 dead transitions. [2025-02-06 13:11:31,220 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 42 transitions, 175 flow [2025-02-06 13:11:31,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:11:31,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:11:31,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 84 transitions. [2025-02-06 13:11:31,223 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4375 [2025-02-06 13:11:31,223 INFO L175 Difference]: Start difference. First operand has 45 places, 45 transitions, 115 flow. Second operand 4 states and 84 transitions. [2025-02-06 13:11:31,223 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 42 transitions, 175 flow [2025-02-06 13:11:31,224 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 42 transitions, 172 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:11:31,225 INFO L231 Difference]: Finished difference. Result has 44 places, 42 transitions, 110 flow [2025-02-06 13:11:31,225 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=104, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=110, PETRI_PLACES=44, PETRI_TRANSITIONS=42} [2025-02-06 13:11:31,225 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -6 predicate places. [2025-02-06 13:11:31,226 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 42 transitions, 110 flow [2025-02-06 13:11:31,226 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.25) internal successors, (61), 4 states have internal predecessors, (61), 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 13:11:31,226 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:31,226 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:31,226 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-02-06 13:11:31,226 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:11:31,226 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:31,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1982287334, now seen corresponding path program 1 times [2025-02-06 13:11:31,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:31,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [115189250] [2025-02-06 13:11:31,230 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:31,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:31,237 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-02-06 13:11:31,243 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-02-06 13:11:31,244 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:31,244 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:31,331 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 13:11:31,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:31,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [115189250] [2025-02-06 13:11:31,332 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [115189250] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:31,332 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:31,332 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:11:31,332 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305028407] [2025-02-06 13:11:31,332 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:31,333 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:11:31,333 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:31,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:11:31,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:11:31,337 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-02-06 13:11:31,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 42 transitions, 110 flow. Second operand has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:31,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:31,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-02-06 13:11:31,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:31,542 INFO L124 PetriNetUnfolderBase]: 1128/1801 cut-off events. [2025-02-06 13:11:31,542 INFO L125 PetriNetUnfolderBase]: For 169/169 co-relation queries the response was YES. [2025-02-06 13:11:31,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3829 conditions, 1801 events. 1128/1801 cut-off events. For 169/169 co-relation queries the response was YES. Maximal size of possible extension queue 78. Compared 8778 event pairs, 966 based on Foata normal form. 0/1590 useless extension candidates. Maximal degree in co-relation 3198. Up to 1421 conditions per place. [2025-02-06 13:11:31,550 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 47 selfloop transitions, 3 changer transitions 0/58 dead transitions. [2025-02-06 13:11:31,550 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 58 transitions, 248 flow [2025-02-06 13:11:31,551 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:11:31,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:11:31,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 105 transitions. [2025-02-06 13:11:31,552 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.546875 [2025-02-06 13:11:31,552 INFO L175 Difference]: Start difference. First operand has 44 places, 42 transitions, 110 flow. Second operand 4 states and 105 transitions. [2025-02-06 13:11:31,552 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 58 transitions, 248 flow [2025-02-06 13:11:31,553 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 58 transitions, 244 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:11:31,554 INFO L231 Difference]: Finished difference. Result has 46 places, 42 transitions, 115 flow [2025-02-06 13:11:31,554 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=42, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=42, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=115, PETRI_PLACES=46, PETRI_TRANSITIONS=42} [2025-02-06 13:11:31,554 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2025-02-06 13:11:31,554 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 42 transitions, 115 flow [2025-02-06 13:11:31,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 16.25) internal successors, (65), 4 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:31,555 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:31,555 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:31,555 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-02-06 13:11:31,555 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:11:31,556 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:31,556 INFO L85 PathProgramCache]: Analyzing trace with hash 1678756712, now seen corresponding path program 1 times [2025-02-06 13:11:31,556 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:31,556 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [382981350] [2025-02-06 13:11:31,556 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:31,556 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:31,562 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-02-06 13:11:31,569 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-02-06 13:11:31,572 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:31,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-02-06 13:11:31,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:31,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [382981350] [2025-02-06 13:11:31,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [382981350] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:31,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:31,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:11:31,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559099192] [2025-02-06 13:11:31,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:31,813 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:11:31,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:31,814 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:11:31,814 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:11:31,833 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-02-06 13:11:31,834 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 42 transitions, 115 flow. Second operand has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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 13:11:31,834 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:31,834 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-02-06 13:11:31,834 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:32,047 INFO L124 PetriNetUnfolderBase]: 776/1365 cut-off events. [2025-02-06 13:11:32,047 INFO L125 PetriNetUnfolderBase]: For 203/203 co-relation queries the response was YES. [2025-02-06 13:11:32,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2834 conditions, 1365 events. 776/1365 cut-off events. For 203/203 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 6883 event pairs, 533 based on Foata normal form. 124/1399 useless extension candidates. Maximal degree in co-relation 2207. Up to 1001 conditions per place. [2025-02-06 13:11:32,054 INFO L140 encePairwiseOnDemand]: 40/48 looper letters, 33 selfloop transitions, 8 changer transitions 0/49 dead transitions. [2025-02-06 13:11:32,055 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 49 transitions, 213 flow [2025-02-06 13:11:32,055 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:11:32,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:11:32,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 110 transitions. [2025-02-06 13:11:32,056 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4583333333333333 [2025-02-06 13:11:32,056 INFO L175 Difference]: Start difference. First operand has 46 places, 42 transitions, 115 flow. Second operand 5 states and 110 transitions. [2025-02-06 13:11:32,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 49 transitions, 213 flow [2025-02-06 13:11:32,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 49 transitions, 208 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-02-06 13:11:32,057 INFO L231 Difference]: Finished difference. Result has 45 places, 39 transitions, 118 flow [2025-02-06 13:11:32,057 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=118, PETRI_PLACES=45, PETRI_TRANSITIONS=39} [2025-02-06 13:11:32,058 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -5 predicate places. [2025-02-06 13:11:32,058 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 39 transitions, 118 flow [2025-02-06 13:11:32,058 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.833333333333334) internal successors, (95), 6 states have internal predecessors, (95), 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 13:11:32,058 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:32,058 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:32,059 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2025-02-06 13:11:32,059 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:11:32,059 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:32,060 INFO L85 PathProgramCache]: Analyzing trace with hash 988772833, now seen corresponding path program 1 times [2025-02-06 13:11:32,060 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:32,060 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1432764749] [2025-02-06 13:11:32,060 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:32,060 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:32,066 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:11:32,071 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:11:32,071 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:32,071 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:32,147 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 13:11:32,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:32,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1432764749] [2025-02-06 13:11:32,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1432764749] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:32,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:32,148 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:11:32,148 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519611124] [2025-02-06 13:11:32,148 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:32,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:11:32,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:32,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:11:32,150 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:11:32,153 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-02-06 13:11:32,153 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 39 transitions, 118 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 13:11:32,154 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:32,154 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-02-06 13:11:32,154 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:32,295 INFO L124 PetriNetUnfolderBase]: 621/1052 cut-off events. [2025-02-06 13:11:32,296 INFO L125 PetriNetUnfolderBase]: For 472/472 co-relation queries the response was YES. [2025-02-06 13:11:32,298 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2406 conditions, 1052 events. 621/1052 cut-off events. For 472/472 co-relation queries the response was YES. Maximal size of possible extension queue 48. Compared 4548 event pairs, 75 based on Foata normal form. 56/1092 useless extension candidates. Maximal degree in co-relation 1895. Up to 636 conditions per place. [2025-02-06 13:11:32,301 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 55 selfloop transitions, 4 changer transitions 0/67 dead transitions. [2025-02-06 13:11:32,302 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 48 places, 67 transitions, 336 flow [2025-02-06 13:11:32,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:11:32,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:11:32,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2025-02-06 13:11:32,303 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5572916666666666 [2025-02-06 13:11:32,303 INFO L175 Difference]: Start difference. First operand has 45 places, 39 transitions, 118 flow. Second operand 4 states and 107 transitions. [2025-02-06 13:11:32,303 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 48 places, 67 transitions, 336 flow [2025-02-06 13:11:32,304 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 67 transitions, 300 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-02-06 13:11:32,305 INFO L231 Difference]: Finished difference. Result has 46 places, 41 transitions, 123 flow [2025-02-06 13:11:32,305 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=102, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=123, PETRI_PLACES=46, PETRI_TRANSITIONS=41} [2025-02-06 13:11:32,308 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, -4 predicate places. [2025-02-06 13:11:32,308 INFO L471 AbstractCegarLoop]: Abstraction has has 46 places, 41 transitions, 123 flow [2025-02-06 13:11:32,309 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 13:11:32,309 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:32,309 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:32,309 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-02-06 13:11:32,309 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:11:32,309 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:32,310 INFO L85 PathProgramCache]: Analyzing trace with hash 1776818739, now seen corresponding path program 2 times [2025-02-06 13:11:32,310 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:32,310 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396094446] [2025-02-06 13:11:32,310 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:11:32,310 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:32,316 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 22 statements into 1 equivalence classes. [2025-02-06 13:11:32,322 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:11:32,323 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-02-06 13:11:32,323 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:32,415 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 13:11:32,415 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:32,415 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396094446] [2025-02-06 13:11:32,415 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396094446] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:32,415 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:32,416 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:11:32,416 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1766751272] [2025-02-06 13:11:32,416 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:32,416 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:11:32,416 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:32,416 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:11:32,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:11:32,416 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-02-06 13:11:32,417 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 41 transitions, 123 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 13:11:32,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:32,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-02-06 13:11:32,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:32,559 INFO L124 PetriNetUnfolderBase]: 566/937 cut-off events. [2025-02-06 13:11:32,559 INFO L125 PetriNetUnfolderBase]: For 404/404 co-relation queries the response was YES. [2025-02-06 13:11:32,561 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2325 conditions, 937 events. 566/937 cut-off events. For 404/404 co-relation queries the response was YES. Maximal size of possible extension queue 42. Compared 3983 event pairs, 112 based on Foata normal form. 28/940 useless extension candidates. Maximal degree in co-relation 1792. Up to 622 conditions per place. [2025-02-06 13:11:32,565 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 44 selfloop transitions, 6 changer transitions 0/58 dead transitions. [2025-02-06 13:11:32,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 49 places, 58 transitions, 280 flow [2025-02-06 13:11:32,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:11:32,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:11:32,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 98 transitions. [2025-02-06 13:11:32,566 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5104166666666666 [2025-02-06 13:11:32,566 INFO L175 Difference]: Start difference. First operand has 46 places, 41 transitions, 123 flow. Second operand 4 states and 98 transitions. [2025-02-06 13:11:32,566 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 49 places, 58 transitions, 280 flow [2025-02-06 13:11:32,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 48 places, 58 transitions, 275 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:11:32,570 INFO L231 Difference]: Finished difference. Result has 50 places, 44 transitions, 153 flow [2025-02-06 13:11:32,570 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=120, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=153, PETRI_PLACES=50, PETRI_TRANSITIONS=44} [2025-02-06 13:11:32,570 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 0 predicate places. [2025-02-06 13:11:32,571 INFO L471 AbstractCegarLoop]: Abstraction has has 50 places, 44 transitions, 153 flow [2025-02-06 13:11:32,571 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 13:11:32,571 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:32,572 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:32,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-02-06 13:11:32,572 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:11:32,572 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:32,572 INFO L85 PathProgramCache]: Analyzing trace with hash 1609085659, now seen corresponding path program 3 times [2025-02-06 13:11:32,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:32,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422250013] [2025-02-06 13:11:32,573 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:11:32,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:32,581 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:11:32,590 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:11:32,590 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:11:32,590 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:32,727 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 13:11:32,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:32,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422250013] [2025-02-06 13:11:32,728 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422250013] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:32,728 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:32,728 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:11:32,728 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991803306] [2025-02-06 13:11:32,728 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:32,729 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-02-06 13:11:32,729 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:32,729 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-02-06 13:11:32,729 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-02-06 13:11:32,736 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-02-06 13:11:32,737 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 50 places, 44 transitions, 153 flow. Second operand has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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 13:11:32,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:32,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-02-06 13:11:32,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:32,953 INFO L124 PetriNetUnfolderBase]: 674/1153 cut-off events. [2025-02-06 13:11:32,953 INFO L125 PetriNetUnfolderBase]: For 670/670 co-relation queries the response was YES. [2025-02-06 13:11:32,955 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2948 conditions, 1153 events. 674/1153 cut-off events. For 670/670 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 5286 event pairs, 148 based on Foata normal form. 52/1190 useless extension candidates. Maximal degree in co-relation 2274. Up to 612 conditions per place. [2025-02-06 13:11:32,959 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 65 selfloop transitions, 7 changer transitions 0/80 dead transitions. [2025-02-06 13:11:32,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 54 places, 80 transitions, 413 flow [2025-02-06 13:11:32,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:11:32,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:11:32,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 130 transitions. [2025-02-06 13:11:32,961 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-02-06 13:11:32,961 INFO L175 Difference]: Start difference. First operand has 50 places, 44 transitions, 153 flow. Second operand 5 states and 130 transitions. [2025-02-06 13:11:32,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 54 places, 80 transitions, 413 flow [2025-02-06 13:11:32,962 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 80 transitions, 408 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-02-06 13:11:32,963 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 171 flow [2025-02-06 13:11:32,963 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=37, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=171, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2025-02-06 13:11:32,964 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 4 predicate places. [2025-02-06 13:11:32,964 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 171 flow [2025-02-06 13:11:32,964 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.6) internal successors, (88), 5 states have internal predecessors, (88), 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 13:11:32,964 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:32,964 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:32,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-02-06 13:11:32,965 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:11:32,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:32,965 INFO L85 PathProgramCache]: Analyzing trace with hash 986869303, now seen corresponding path program 4 times [2025-02-06 13:11:32,965 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:32,965 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1139885346] [2025-02-06 13:11:32,966 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:11:32,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:32,972 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:11:32,977 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:11:32,977 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:11:32,977 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:33,050 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 13:11:33,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:33,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1139885346] [2025-02-06 13:11:33,051 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1139885346] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:33,051 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:33,051 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:11:33,052 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [77416024] [2025-02-06 13:11:33,052 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:33,052 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:11:33,052 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:33,052 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:11:33,053 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:11:33,053 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-02-06 13:11:33,053 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 171 flow. Second operand has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 13:11:33,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:33,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-02-06 13:11:33,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:33,240 INFO L124 PetriNetUnfolderBase]: 934/1633 cut-off events. [2025-02-06 13:11:33,240 INFO L125 PetriNetUnfolderBase]: For 1440/1452 co-relation queries the response was YES. [2025-02-06 13:11:33,244 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4242 conditions, 1633 events. 934/1633 cut-off events. For 1440/1452 co-relation queries the response was YES. Maximal size of possible extension queue 72. Compared 8422 event pairs, 276 based on Foata normal form. 70/1634 useless extension candidates. Maximal degree in co-relation 3482. Up to 794 conditions per place. [2025-02-06 13:11:33,255 INFO L140 encePairwiseOnDemand]: 43/48 looper letters, 58 selfloop transitions, 7 changer transitions 0/73 dead transitions. [2025-02-06 13:11:33,256 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 73 transitions, 402 flow [2025-02-06 13:11:33,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-02-06 13:11:33,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-02-06 13:11:33,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 123 transitions. [2025-02-06 13:11:33,258 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5125 [2025-02-06 13:11:33,258 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 171 flow. Second operand 5 states and 123 transitions. [2025-02-06 13:11:33,258 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 73 transitions, 402 flow [2025-02-06 13:11:33,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 55 places, 73 transitions, 388 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:11:33,263 INFO L231 Difference]: Finished difference. Result has 56 places, 46 transitions, 183 flow [2025-02-06 13:11:33,263 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=51, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=56, PETRI_TRANSITIONS=46} [2025-02-06 13:11:33,264 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 6 predicate places. [2025-02-06 13:11:33,264 INFO L471 AbstractCegarLoop]: Abstraction has has 56 places, 46 transitions, 183 flow [2025-02-06 13:11:33,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.5) internal successors, (74), 4 states have internal predecessors, (74), 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 13:11:33,265 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:33,265 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:33,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2025-02-06 13:11:33,265 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:11:33,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:33,266 INFO L85 PathProgramCache]: Analyzing trace with hash 1917580925, now seen corresponding path program 5 times [2025-02-06 13:11:33,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:33,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250507668] [2025-02-06 13:11:33,266 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-02-06 13:11:33,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:33,273 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 2 equivalence classes. [2025-02-06 13:11:33,282 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-02-06 13:11:33,282 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:11:33,282 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:33,454 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 13:11:33,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:33,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250507668] [2025-02-06 13:11:33,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250507668] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:33,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:33,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-02-06 13:11:33,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809182290] [2025-02-06 13:11:33,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:33,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-02-06 13:11:33,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:33,455 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-02-06 13:11:33,455 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-02-06 13:11:33,463 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-02-06 13:11:33,463 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 56 places, 46 transitions, 183 flow. Second operand has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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 13:11:33,463 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:33,463 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-02-06 13:11:33,463 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:33,725 INFO L124 PetriNetUnfolderBase]: 1151/2032 cut-off events. [2025-02-06 13:11:33,725 INFO L125 PetriNetUnfolderBase]: For 1604/1604 co-relation queries the response was YES. [2025-02-06 13:11:33,729 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5302 conditions, 2032 events. 1151/2032 cut-off events. For 1604/1604 co-relation queries the response was YES. Maximal size of possible extension queue 88. Compared 10534 event pairs, 134 based on Foata normal form. 104/2093 useless extension candidates. Maximal degree in co-relation 4711. Up to 538 conditions per place. [2025-02-06 13:11:33,733 INFO L140 encePairwiseOnDemand]: 42/48 looper letters, 64 selfloop transitions, 5 changer transitions 18/95 dead transitions. [2025-02-06 13:11:33,733 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 95 transitions, 549 flow [2025-02-06 13:11:33,734 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-02-06 13:11:33,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-02-06 13:11:33,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2025-02-06 13:11:33,735 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5381944444444444 [2025-02-06 13:11:33,735 INFO L175 Difference]: Start difference. First operand has 56 places, 46 transitions, 183 flow. Second operand 6 states and 155 transitions. [2025-02-06 13:11:33,735 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 95 transitions, 549 flow [2025-02-06 13:11:33,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 95 transitions, 531 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-02-06 13:11:33,738 INFO L231 Difference]: Finished difference. Result has 60 places, 41 transitions, 161 flow [2025-02-06 13:11:33,738 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=46, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=161, PETRI_PLACES=60, PETRI_TRANSITIONS=41} [2025-02-06 13:11:33,739 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 10 predicate places. [2025-02-06 13:11:33,739 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 41 transitions, 161 flow [2025-02-06 13:11:33,739 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 17.0) internal successors, (102), 6 states have internal predecessors, (102), 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 13:11:33,739 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:33,739 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:33,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2025-02-06 13:11:33,739 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:11:33,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:33,740 INFO L85 PathProgramCache]: Analyzing trace with hash -606800620, now seen corresponding path program 1 times [2025-02-06 13:11:33,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:33,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310994780] [2025-02-06 13:11:33,740 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:33,740 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:33,748 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-06 13:11:33,772 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 13:11:33,772 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:33,772 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:34,574 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-02-06 13:11:34,574 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:34,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310994780] [2025-02-06 13:11:34,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310994780] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:34,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1255388867] [2025-02-06 13:11:34,575 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:34,575 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:34,575 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:34,578 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 13:11:34,580 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 13:11:34,629 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 32 statements into 1 equivalence classes. [2025-02-06 13:11:34,657 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 32 of 32 statements. [2025-02-06 13:11:34,658 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:34,658 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:34,661 INFO L256 TraceCheckSpWp]: Trace formula consists of 205 conjuncts, 33 conjuncts are in the unsatisfiable core [2025-02-06 13:11:34,665 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:34,716 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-02-06 13:11:35,088 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 13:11:35,088 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:35,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 61 treesize of output 55 [2025-02-06 13:11:35,871 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:11:35,871 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 78 treesize of output 68 [2025-02-06 13:11:36,000 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 13:11:36,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1255388867] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:36,001 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:36,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 29 [2025-02-06 13:11:36,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184411060] [2025-02-06 13:11:36,001 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:36,001 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-02-06 13:11:36,002 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:36,002 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-02-06 13:11:36,003 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=159, Invalid=711, Unknown=0, NotChecked=0, Total=870 [2025-02-06 13:11:36,107 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2025-02-06 13:11:36,108 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 41 transitions, 161 flow. Second operand has 30 states, 30 states have (on average 13.366666666666667) internal successors, (401), 30 states have internal predecessors, (401), 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 13:11:36,109 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:36,109 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2025-02-06 13:11:36,109 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:39,060 INFO L124 PetriNetUnfolderBase]: 5597/8710 cut-off events. [2025-02-06 13:11:39,061 INFO L125 PetriNetUnfolderBase]: For 11112/11112 co-relation queries the response was YES. [2025-02-06 13:11:39,077 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25535 conditions, 8710 events. 5597/8710 cut-off events. For 11112/11112 co-relation queries the response was YES. Maximal size of possible extension queue 388. Compared 51240 event pairs, 559 based on Foata normal form. 136/8426 useless extension candidates. Maximal degree in co-relation 14567. Up to 2017 conditions per place. [2025-02-06 13:11:39,095 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 256 selfloop transitions, 79 changer transitions 53/393 dead transitions. [2025-02-06 13:11:39,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 393 transitions, 2414 flow [2025-02-06 13:11:39,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2025-02-06 13:11:39,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2025-02-06 13:11:39,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 818 transitions. [2025-02-06 13:11:39,101 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41565040650406504 [2025-02-06 13:11:39,101 INFO L175 Difference]: Start difference. First operand has 60 places, 41 transitions, 161 flow. Second operand 41 states and 818 transitions. [2025-02-06 13:11:39,102 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 393 transitions, 2414 flow [2025-02-06 13:11:39,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 393 transitions, 2173 flow, removed 35 selfloop flow, removed 11 redundant places. [2025-02-06 13:11:39,118 INFO L231 Difference]: Finished difference. Result has 107 places, 127 transitions, 827 flow [2025-02-06 13:11:39,118 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=41, PETRI_FLOW=827, PETRI_PLACES=107, PETRI_TRANSITIONS=127} [2025-02-06 13:11:39,119 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 57 predicate places. [2025-02-06 13:11:39,119 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 127 transitions, 827 flow [2025-02-06 13:11:39,120 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 13.366666666666667) internal successors, (401), 30 states have internal predecessors, (401), 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 13:11:39,120 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:39,120 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:39,127 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 13:11:39,323 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,3 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:39,323 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:11:39,324 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:39,324 INFO L85 PathProgramCache]: Analyzing trace with hash -1826522758, now seen corresponding path program 1 times [2025-02-06 13:11:39,324 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:39,324 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280699377] [2025-02-06 13:11:39,324 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:39,324 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:39,337 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 34 statements into 1 equivalence classes. [2025-02-06 13:11:39,347 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 34 of 34 statements. [2025-02-06 13:11:39,349 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:39,349 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:39,444 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2025-02-06 13:11:39,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:39,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280699377] [2025-02-06 13:11:39,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280699377] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:39,445 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:39,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:11:39,446 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875862172] [2025-02-06 13:11:39,446 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:39,446 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-02-06 13:11:39,446 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:39,448 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-02-06 13:11:39,448 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-02-06 13:11:39,451 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 48 [2025-02-06 13:11:39,451 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 127 transitions, 827 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 13:11:39,451 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:39,451 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 48 [2025-02-06 13:11:39,451 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:39,841 INFO L124 PetriNetUnfolderBase]: 2265/3706 cut-off events. [2025-02-06 13:11:39,843 INFO L125 PetriNetUnfolderBase]: For 11192/11192 co-relation queries the response was YES. [2025-02-06 13:11:39,853 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13530 conditions, 3706 events. 2265/3706 cut-off events. For 11192/11192 co-relation queries the response was YES. Maximal size of possible extension queue 146. Compared 19429 event pairs, 959 based on Foata normal form. 24/3729 useless extension candidates. Maximal degree in co-relation 12193. Up to 2987 conditions per place. [2025-02-06 13:11:39,864 INFO L140 encePairwiseOnDemand]: 45/48 looper letters, 134 selfloop transitions, 4 changer transitions 0/144 dead transitions. [2025-02-06 13:11:39,865 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 109 places, 144 transitions, 1233 flow [2025-02-06 13:11:39,865 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-02-06 13:11:39,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-02-06 13:11:39,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 78 transitions. [2025-02-06 13:11:39,867 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5416666666666666 [2025-02-06 13:11:39,867 INFO L175 Difference]: Start difference. First operand has 107 places, 127 transitions, 827 flow. Second operand 3 states and 78 transitions. [2025-02-06 13:11:39,867 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 109 places, 144 transitions, 1233 flow [2025-02-06 13:11:39,899 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 144 transitions, 1064 flow, removed 57 selfloop flow, removed 7 redundant places. [2025-02-06 13:11:39,901 INFO L231 Difference]: Finished difference. Result has 103 places, 123 transitions, 677 flow [2025-02-06 13:11:39,902 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=657, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=122, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=677, PETRI_PLACES=103, PETRI_TRANSITIONS=123} [2025-02-06 13:11:39,903 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 53 predicate places. [2025-02-06 13:11:39,903 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 123 transitions, 677 flow [2025-02-06 13:11:39,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 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 13:11:39,904 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:39,904 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:39,904 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-02-06 13:11:39,904 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:11:39,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:39,904 INFO L85 PathProgramCache]: Analyzing trace with hash -34637395, now seen corresponding path program 2 times [2025-02-06 13:11:39,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:39,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [111121190] [2025-02-06 13:11:39,905 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:11:39,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:39,913 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-02-06 13:11:39,923 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 37 of 37 statements. [2025-02-06 13:11:39,924 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:11:39,924 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:39,981 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-02-06 13:11:39,981 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:39,981 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [111121190] [2025-02-06 13:11:39,981 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [111121190] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:39,981 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:39,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-02-06 13:11:39,982 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833130670] [2025-02-06 13:11:39,982 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:39,982 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:11:39,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:39,983 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:11:39,983 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:11:39,983 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-02-06 13:11:39,984 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 123 transitions, 677 flow. Second operand has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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 13:11:39,984 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:39,984 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-02-06 13:11:39,984 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:40,509 INFO L124 PetriNetUnfolderBase]: 2835/5054 cut-off events. [2025-02-06 13:11:40,509 INFO L125 PetriNetUnfolderBase]: For 17290/17322 co-relation queries the response was YES. [2025-02-06 13:11:40,522 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17995 conditions, 5054 events. 2835/5054 cut-off events. For 17290/17322 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 30605 event pairs, 856 based on Foata normal form. 178/5195 useless extension candidates. Maximal degree in co-relation 7631. Up to 2219 conditions per place. [2025-02-06 13:11:40,545 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 136 selfloop transitions, 39 changer transitions 0/195 dead transitions. [2025-02-06 13:11:40,546 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 195 transitions, 1460 flow [2025-02-06 13:11:40,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:11:40,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:11:40,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 116 transitions. [2025-02-06 13:11:40,547 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6041666666666666 [2025-02-06 13:11:40,547 INFO L175 Difference]: Start difference. First operand has 103 places, 123 transitions, 677 flow. Second operand 4 states and 116 transitions. [2025-02-06 13:11:40,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 195 transitions, 1460 flow [2025-02-06 13:11:40,581 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 195 transitions, 1454 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-02-06 13:11:40,584 INFO L231 Difference]: Finished difference. Result has 107 places, 156 transitions, 1107 flow [2025-02-06 13:11:40,584 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=671, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1107, PETRI_PLACES=107, PETRI_TRANSITIONS=156} [2025-02-06 13:11:40,585 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 57 predicate places. [2025-02-06 13:11:40,585 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 156 transitions, 1107 flow [2025-02-06 13:11:40,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 20.75) internal successors, (83), 4 states have internal predecessors, (83), 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 13:11:40,585 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:40,585 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:40,585 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-02-06 13:11:40,586 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:11:40,586 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:40,586 INFO L85 PathProgramCache]: Analyzing trace with hash 1138883068, now seen corresponding path program 3 times [2025-02-06 13:11:40,586 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:40,586 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155695288] [2025-02-06 13:11:40,586 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-02-06 13:11:40,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:40,595 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 38 statements into 6 equivalence classes. [2025-02-06 13:11:40,610 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 31 of 38 statements. [2025-02-06 13:11:40,610 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-02-06 13:11:40,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:40,880 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 9 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2025-02-06 13:11:40,880 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:40,880 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155695288] [2025-02-06 13:11:40,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [155695288] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:40,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:40,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2025-02-06 13:11:40,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780260253] [2025-02-06 13:11:40,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:40,881 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-02-06 13:11:40,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:40,882 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-02-06 13:11:40,882 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=54, Unknown=0, NotChecked=0, Total=72 [2025-02-06 13:11:40,891 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 48 [2025-02-06 13:11:40,891 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 156 transitions, 1107 flow. Second operand has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:40,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:40,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 48 [2025-02-06 13:11:40,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:41,678 INFO L124 PetriNetUnfolderBase]: 4357/7705 cut-off events. [2025-02-06 13:11:41,678 INFO L125 PetriNetUnfolderBase]: For 37003/37103 co-relation queries the response was YES. [2025-02-06 13:11:41,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30323 conditions, 7705 events. 4357/7705 cut-off events. For 37003/37103 co-relation queries the response was YES. Maximal size of possible extension queue 327. Compared 50037 event pairs, 400 based on Foata normal form. 268/7921 useless extension candidates. Maximal degree in co-relation 12186. Up to 1852 conditions per place. [2025-02-06 13:11:41,707 INFO L140 encePairwiseOnDemand]: 41/48 looper letters, 223 selfloop transitions, 36 changer transitions 50/329 dead transitions. [2025-02-06 13:11:41,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 329 transitions, 3196 flow [2025-02-06 13:11:41,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-02-06 13:11:41,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-02-06 13:11:41,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2025-02-06 13:11:41,708 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49537037037037035 [2025-02-06 13:11:41,708 INFO L175 Difference]: Start difference. First operand has 107 places, 156 transitions, 1107 flow. Second operand 9 states and 214 transitions. [2025-02-06 13:11:41,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 329 transitions, 3196 flow [2025-02-06 13:11:41,755 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 115 places, 329 transitions, 3100 flow, removed 48 selfloop flow, removed 0 redundant places. [2025-02-06 13:11:41,758 INFO L231 Difference]: Finished difference. Result has 117 places, 169 transitions, 1346 flow [2025-02-06 13:11:41,759 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1077, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1346, PETRI_PLACES=117, PETRI_TRANSITIONS=169} [2025-02-06 13:11:41,759 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 67 predicate places. [2025-02-06 13:11:41,759 INFO L471 AbstractCegarLoop]: Abstraction has has 117 places, 169 transitions, 1346 flow [2025-02-06 13:11:41,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 16.77777777777778) internal successors, (151), 9 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-02-06 13:11:41,760 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:41,760 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:41,760 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2025-02-06 13:11:41,760 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:11:41,761 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:41,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1158410065, now seen corresponding path program 4 times [2025-02-06 13:11:41,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:41,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528543898] [2025-02-06 13:11:41,761 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-02-06 13:11:41,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:41,768 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 42 statements into 2 equivalence classes. [2025-02-06 13:11:41,792 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-02-06 13:11:41,797 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-02-06 13:11:41,797 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:41,906 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-02-06 13:11:41,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:41,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528543898] [2025-02-06 13:11:41,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528543898] provided 1 perfect and 0 imperfect interpolant sequences [2025-02-06 13:11:41,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-02-06 13:11:41,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-02-06 13:11:41,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899467183] [2025-02-06 13:11:41,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-02-06 13:11:41,908 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-02-06 13:11:41,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:41,909 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-02-06 13:11:41,909 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-02-06 13:11:41,913 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2025-02-06 13:11:41,913 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 117 places, 169 transitions, 1346 flow. Second operand has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 13:11:41,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:41,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2025-02-06 13:11:41,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:42,703 INFO L124 PetriNetUnfolderBase]: 5059/8266 cut-off events. [2025-02-06 13:11:42,703 INFO L125 PetriNetUnfolderBase]: For 33954/33954 co-relation queries the response was YES. [2025-02-06 13:11:42,718 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32996 conditions, 8266 events. 5059/8266 cut-off events. For 33954/33954 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 47545 event pairs, 1123 based on Foata normal form. 488/8753 useless extension candidates. Maximal degree in co-relation 30323. Up to 4063 conditions per place. [2025-02-06 13:11:42,737 INFO L140 encePairwiseOnDemand]: 44/48 looper letters, 161 selfloop transitions, 6 changer transitions 1/173 dead transitions. [2025-02-06 13:11:42,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 173 transitions, 1797 flow [2025-02-06 13:11:42,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-02-06 13:11:42,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-02-06 13:11:42,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 95 transitions. [2025-02-06 13:11:42,738 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4947916666666667 [2025-02-06 13:11:42,738 INFO L175 Difference]: Start difference. First operand has 117 places, 169 transitions, 1346 flow. Second operand 4 states and 95 transitions. [2025-02-06 13:11:42,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 173 transitions, 1797 flow [2025-02-06 13:11:42,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 173 transitions, 1694 flow, removed 26 selfloop flow, removed 11 redundant places. [2025-02-06 13:11:42,797 INFO L231 Difference]: Finished difference. Result has 102 places, 130 transitions, 1038 flow [2025-02-06 13:11:42,797 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=1003, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=130, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=125, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1038, PETRI_PLACES=102, PETRI_TRANSITIONS=130} [2025-02-06 13:11:42,798 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 52 predicate places. [2025-02-06 13:11:42,798 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 130 transitions, 1038 flow [2025-02-06 13:11:42,798 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 19.5) internal successors, (78), 4 states have internal predecessors, (78), 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 13:11:42,798 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:42,798 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:42,798 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2025-02-06 13:11:42,798 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:11:42,799 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:42,799 INFO L85 PathProgramCache]: Analyzing trace with hash 1819100179, now seen corresponding path program 1 times [2025-02-06 13:11:42,799 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:42,799 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908057827] [2025-02-06 13:11:42,799 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:42,799 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:42,807 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-02-06 13:11:42,821 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-02-06 13:11:42,822 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:42,822 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:43,953 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:43,954 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:43,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908057827] [2025-02-06 13:11:43,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908057827] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:43,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1856586979] [2025-02-06 13:11:43,954 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-02-06 13:11:43,954 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:43,954 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:43,956 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 13:11:43,960 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 13:11:44,008 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 42 statements into 1 equivalence classes. [2025-02-06 13:11:44,040 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 42 of 42 statements. [2025-02-06 13:11:44,041 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-02-06 13:11:44,041 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:44,042 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 40 conjuncts are in the unsatisfiable core [2025-02-06 13:11:44,046 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:44,688 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 5 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:44,688 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:45,093 INFO L349 Elim1Store]: treesize reduction 10, result has 73.0 percent of original size [2025-02-06 13:11:45,094 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 75 treesize of output 50 [2025-02-06 13:11:45,584 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:45,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1856586979] provided 0 perfect and 2 imperfect interpolant sequences [2025-02-06 13:11:45,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-02-06 13:11:45,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 36 [2025-02-06 13:11:45,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1537360848] [2025-02-06 13:11:45,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-02-06 13:11:45,585 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2025-02-06 13:11:45,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-02-06 13:11:45,586 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2025-02-06 13:11:45,586 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=192, Invalid=1140, Unknown=0, NotChecked=0, Total=1332 [2025-02-06 13:11:45,695 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 48 [2025-02-06 13:11:45,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 130 transitions, 1038 flow. Second operand has 37 states, 37 states have (on average 13.81081081081081) internal successors, (511), 37 states have internal predecessors, (511), 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 13:11:45,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-02-06 13:11:45,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 48 [2025-02-06 13:11:45,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-02-06 13:11:50,827 INFO L124 PetriNetUnfolderBase]: 11833/19168 cut-off events. [2025-02-06 13:11:50,828 INFO L125 PetriNetUnfolderBase]: For 63973/63973 co-relation queries the response was YES. [2025-02-06 13:11:50,873 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72969 conditions, 19168 events. 11833/19168 cut-off events. For 63973/63973 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 123416 event pairs, 903 based on Foata normal form. 580/19747 useless extension candidates. Maximal degree in co-relation 68815. Up to 3153 conditions per place. [2025-02-06 13:11:50,915 INFO L140 encePairwiseOnDemand]: 33/48 looper letters, 521 selfloop transitions, 230 changer transitions 114/870 dead transitions. [2025-02-06 13:11:50,915 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 870 transitions, 7159 flow [2025-02-06 13:11:50,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2025-02-06 13:11:50,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2025-02-06 13:11:50,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 1606 transitions. [2025-02-06 13:11:50,920 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.39362745098039215 [2025-02-06 13:11:50,920 INFO L175 Difference]: Start difference. First operand has 102 places, 130 transitions, 1038 flow. Second operand 85 states and 1606 transitions. [2025-02-06 13:11:50,920 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 870 transitions, 7159 flow [2025-02-06 13:11:50,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 870 transitions, 7076 flow, removed 37 selfloop flow, removed 2 redundant places. [2025-02-06 13:11:50,991 INFO L231 Difference]: Finished difference. Result has 207 places, 295 transitions, 3207 flow [2025-02-06 13:11:50,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=48, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=99, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=85, PETRI_FLOW=3207, PETRI_PLACES=207, PETRI_TRANSITIONS=295} [2025-02-06 13:11:50,992 INFO L279 CegarLoopForPetriNet]: 50 programPoint places, 157 predicate places. [2025-02-06 13:11:50,992 INFO L471 AbstractCegarLoop]: Abstraction has has 207 places, 295 transitions, 3207 flow [2025-02-06 13:11:50,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 13.81081081081081) internal successors, (511), 37 states have internal predecessors, (511), 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 13:11:50,992 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-02-06 13:11:50,993 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-02-06 13:11:51,000 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 13:11:51,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17,4 /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:51,193 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2025-02-06 13:11:51,194 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-02-06 13:11:51,194 INFO L85 PathProgramCache]: Analyzing trace with hash -515462039, now seen corresponding path program 2 times [2025-02-06 13:11:51,194 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-02-06 13:11:51,194 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999196512] [2025-02-06 13:11:51,194 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:11:51,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-02-06 13:11:51,202 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-02-06 13:11:51,228 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-02-06 13:11:51,229 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:11:51,229 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:51,871 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:51,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-02-06 13:11:51,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999196512] [2025-02-06 13:11:51,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999196512] provided 0 perfect and 1 imperfect interpolant sequences [2025-02-06 13:11:51,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956315049] [2025-02-06 13:11:51,871 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-02-06 13:11:51,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-02-06 13:11:51,871 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-jdk21/releaseScripts/default/UAutomizer-linux/z3 [2025-02-06 13:11:51,878 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 13:11:51,894 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 13:11:51,951 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 42 statements into 2 equivalence classes. [2025-02-06 13:11:51,991 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 42 of 42 statements. [2025-02-06 13:11:51,992 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-02-06 13:11:51,992 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-02-06 13:11:51,994 INFO L256 TraceCheckSpWp]: Trace formula consists of 245 conjuncts, 44 conjuncts are in the unsatisfiable core [2025-02-06 13:11:51,996 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-02-06 13:11:52,080 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2025-02-06 13:11:52,757 INFO L349 Elim1Store]: treesize reduction 42, result has 14.3 percent of original size [2025-02-06 13:11:52,757 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 0 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 6 case distinctions, treesize of input 46 treesize of output 20 [2025-02-06 13:11:52,806 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 5 proven. 11 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-02-06 13:11:52,807 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-02-06 13:11:54,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 174 treesize of output 160 [2025-02-06 13:11:55,012 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-02-06 13:11:55,013 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 6 select indices, 6 select index equivalence classes, 0 disjoint index pairs (out of 15 index pairs), introduced 6 new quantified variables, introduced 15 case distinctions, treesize of input 280 treesize of output 334