./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e2fb8bed Calling Ultimate with: /root/.sdkman/candidates/java/21.0.5-tem/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 387879bf92b16ead997b40b3e249348f8a6b399496756f9bc3c41b6dc3c21353 --- Real Ultimate output --- This is Ultimate 0.3.0-?-e2fb8be-m [2025-03-09 01:23:43,608 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-09 01:23:43,653 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-09 01:23:43,657 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-09 01:23:43,659 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-09 01:23:43,680 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-09 01:23:43,681 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-09 01:23:43,681 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-09 01:23:43,681 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-09 01:23:43,681 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-09 01:23:43,681 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-09 01:23:43,681 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-09 01:23:43,681 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-09 01:23:43,681 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-09 01:23:43,682 INFO L153 SettingsManager]: * Use SBE=true [2025-03-09 01:23:43,682 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-09 01:23:43,682 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-09 01:23:43,682 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-09 01:23:43,682 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-09 01:23:43,682 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-09 01:23:43,682 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-09 01:23:43,682 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-09 01:23:43,682 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-09 01:23:43,682 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-09 01:23:43,682 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-09 01:23:43,682 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-09 01:23:43,682 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-09 01:23:43,682 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-09 01:23:43,682 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-09 01:23:43,682 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-09 01:23:43,682 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-09 01:23:43,682 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-09 01:23:43,683 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-09 01:23:43,683 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:23:43,683 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-09 01:23:43,683 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-09 01:23:43,683 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-09 01:23:43,683 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-09 01:23:43,683 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-09 01:23:43,683 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-09 01:23:43,683 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-09 01:23:43,683 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-09 01:23:43,683 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/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 -> 387879bf92b16ead997b40b3e249348f8a6b399496756f9bc3c41b6dc3c21353 [2025-03-09 01:23:43,912 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 01:23:43,918 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 01:23:43,922 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 01:23:43,923 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 01:23:43,923 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 01:23:43,924 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2025-03-09 01:23:45,088 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b85c838e6/0dd4fe983fa64fcb9388ec2fc0d94c7f/FLAGd83ac7312 [2025-03-09 01:23:45,292 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 01:23:45,293 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2025-03-09 01:23:45,311 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b85c838e6/0dd4fe983fa64fcb9388ec2fc0d94c7f/FLAGd83ac7312 [2025-03-09 01:23:45,328 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/b85c838e6/0dd4fe983fa64fcb9388ec2fc0d94c7f [2025-03-09 01:23:45,330 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 01:23:45,331 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 01:23:45,332 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 01:23:45,332 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 01:23:45,335 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 01:23:45,335 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:23:45" (1/1) ... [2025-03-09 01:23:45,336 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34f45f58 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:45, skipping insertion in model container [2025-03-09 01:23:45,336 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:23:45" (1/1) ... [2025-03-09 01:23:45,347 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:23:45,465 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-09 01:23:45,468 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:23:45,474 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 01:23:45,487 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:23:45,496 INFO L204 MainTranslator]: Completed translation [2025-03-09 01:23:45,497 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:45 WrapperNode [2025-03-09 01:23:45,497 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 01:23:45,498 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 01:23:45,498 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 01:23:45,498 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 01:23:45,502 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:45" (1/1) ... [2025-03-09 01:23:45,506 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:45" (1/1) ... [2025-03-09 01:23:45,524 INFO L138 Inliner]: procedures = 23, calls = 23, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 127 [2025-03-09 01:23:45,525 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 01:23:45,525 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 01:23:45,525 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 01:23:45,525 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 01:23:45,531 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:45" (1/1) ... [2025-03-09 01:23:45,531 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:45" (1/1) ... [2025-03-09 01:23:45,533 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:45" (1/1) ... [2025-03-09 01:23:45,543 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 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]. [2025-03-09 01:23:45,543 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:45" (1/1) ... [2025-03-09 01:23:45,543 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:45" (1/1) ... [2025-03-09 01:23:45,547 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:45" (1/1) ... [2025-03-09 01:23:45,548 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:45" (1/1) ... [2025-03-09 01:23:45,549 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:45" (1/1) ... [2025-03-09 01:23:45,549 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:45" (1/1) ... [2025-03-09 01:23:45,550 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 01:23:45,551 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 01:23:45,551 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 01:23:45,551 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 01:23:45,552 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:45" (1/1) ... [2025-03-09 01:23:45,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:23:45,564 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:23:45,576 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-09 01:23:45,579 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-09 01:23:45,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-09 01:23:45,596 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-09 01:23:45,596 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-09 01:23:45,596 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-09 01:23:45,596 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-09 01:23:45,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-09 01:23:45,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-09 01:23:45,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-09 01:23:45,596 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-09 01:23:45,596 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-09 01:23:45,596 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 01:23:45,596 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 01:23:45,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-09 01:23:45,596 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-09 01:23:45,597 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-09 01:23:45,668 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 01:23:45,670 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 01:23:45,882 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-09 01:23:45,882 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 01:23:46,009 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 01:23:46,010 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 01:23:46,010 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:23:46 BoogieIcfgContainer [2025-03-09 01:23:46,010 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 01:23:46,013 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-09 01:23:46,013 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-09 01:23:46,016 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-09 01:23:46,017 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.03 01:23:45" (1/3) ... [2025-03-09 01:23:46,017 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b7bf95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:23:46, skipping insertion in model container [2025-03-09 01:23:46,018 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:45" (2/3) ... [2025-03-09 01:23:46,019 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@65b7bf95 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:23:46, skipping insertion in model container [2025-03-09 01:23:46,019 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:23:46" (3/3) ... [2025-03-09 01:23:46,019 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2025-03-09 01:23:46,030 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-09 01:23:46,031 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-counter-queue.wvr.c that has 3 procedures, 33 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2025-03-09 01:23:46,031 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-09 01:23:46,072 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-09 01:23:46,097 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 35 transitions, 84 flow [2025-03-09 01:23:46,120 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2025-03-09 01:23:46,122 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-09 01:23:46,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 3/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 66 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2025-03-09 01:23:46,126 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 35 transitions, 84 flow [2025-03-09 01:23:46,128 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 32 transitions, 76 flow [2025-03-09 01:23:46,138 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-09 01:23:46,151 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;@2a3ff24b, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-09 01:23:46,151 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2025-03-09 01:23:46,155 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-09 01:23:46,156 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-09 01:23:46,156 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-09 01:23:46,156 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:46,156 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:23:46,156 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:23:46,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:46,160 INFO L85 PathProgramCache]: Analyzing trace with hash 385404, now seen corresponding path program 1 times [2025-03-09 01:23:46,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:46,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820804929] [2025-03-09 01:23:46,165 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:46,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:46,236 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:23:46,256 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:23:46,256 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:46,256 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:46,368 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:23:46,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:46,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820804929] [2025-03-09 01:23:46,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820804929] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:23:46,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:23:46,372 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-09 01:23:46,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1623354004] [2025-03-09 01:23:46,373 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:23:46,378 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:23:46,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:46,397 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:23:46,397 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:23:46,412 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:23:46,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2025-03-09 01:23:46,415 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:46,415 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:23:46,415 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:46,506 INFO L124 PetriNetUnfolderBase]: 92/179 cut-off events. [2025-03-09 01:23:46,506 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-03-09 01:23:46,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 179 events. 92/179 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 603 event pairs, 68 based on Foata normal form. 1/168 useless extension candidates. Maximal degree in co-relation 315. Up to 160 conditions per place. [2025-03-09 01:23:46,509 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 19 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2025-03-09 01:23:46,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 112 flow [2025-03-09 01:23:46,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:23:46,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:23:46,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2025-03-09 01:23:46,518 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2025-03-09 01:23:46,519 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 56 transitions. [2025-03-09 01:23:46,519 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 112 flow [2025-03-09 01:23:46,522 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 104 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-09 01:23:46,523 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 66 flow [2025-03-09 01:23:46,524 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2025-03-09 01:23:46,527 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2025-03-09 01:23:46,527 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 66 flow [2025-03-09 01:23:46,528 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2025-03-09 01:23:46,528 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:46,528 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:23:46,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-09 01:23:46,528 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:23:46,529 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:46,529 INFO L85 PathProgramCache]: Analyzing trace with hash 385405, now seen corresponding path program 1 times [2025-03-09 01:23:46,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:46,530 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1948381876] [2025-03-09 01:23:46,530 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:46,530 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:46,534 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:23:46,548 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:23:46,549 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:46,549 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:46,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:23:46,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:46,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1948381876] [2025-03-09 01:23:46,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1948381876] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:23:46,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:23:46,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:23:46,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403435319] [2025-03-09 01:23:46,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:23:46,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:23:46,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:46,736 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:23:46,736 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:23:46,753 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:23:46,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 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) [2025-03-09 01:23:46,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:46,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:23:46,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:46,844 INFO L124 PetriNetUnfolderBase]: 92/178 cut-off events. [2025-03-09 01:23:46,844 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-09 01:23:46,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 351 conditions, 178 events. 92/178 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 614 event pairs, 68 based on Foata normal form. 0/167 useless extension candidates. Maximal degree in co-relation 338. Up to 160 conditions per place. [2025-03-09 01:23:46,846 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 17 selfloop transitions, 4 changer transitions 0/28 dead transitions. [2025-03-09 01:23:46,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 28 transitions, 106 flow [2025-03-09 01:23:46,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:23:46,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:23:46,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 66 transitions. [2025-03-09 01:23:46,847 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4714285714285714 [2025-03-09 01:23:46,847 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 66 flow. Second operand 4 states and 66 transitions. [2025-03-09 01:23:46,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 28 transitions, 106 flow [2025-03-09 01:23:46,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 28 transitions, 102 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:23:46,848 INFO L231 Difference]: Finished difference. Result has 31 places, 28 transitions, 68 flow [2025-03-09 01:23:46,848 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=60, PETRI_DIFFERENCE_MINUEND_PLACES=28, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=31, PETRI_TRANSITIONS=28} [2025-03-09 01:23:46,848 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2025-03-09 01:23:46,849 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 28 transitions, 68 flow [2025-03-09 01:23:46,849 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 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) [2025-03-09 01:23:46,849 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:46,849 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-09 01:23:46,849 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-09 01:23:46,849 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:23:46,849 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:46,849 INFO L85 PathProgramCache]: Analyzing trace with hash -1400906315, now seen corresponding path program 1 times [2025-03-09 01:23:46,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:46,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399530663] [2025-03-09 01:23:46,850 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:46,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:46,854 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-09 01:23:46,858 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-09 01:23:46,858 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:46,858 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:46,937 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:23:46,937 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:46,937 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399530663] [2025-03-09 01:23:46,937 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1399530663] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:23:46,938 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:23:46,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:23:46,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873724517] [2025-03-09 01:23:46,938 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:23:46,938 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:23:46,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:46,938 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:23:46,938 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:23:46,957 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2025-03-09 01:23:46,958 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 28 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2025-03-09 01:23:46,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:46,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2025-03-09 01:23:46,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:47,047 INFO L124 PetriNetUnfolderBase]: 92/173 cut-off events. [2025-03-09 01:23:47,047 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-09 01:23:47,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 348 conditions, 173 events. 92/173 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 568 event pairs, 68 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 333. Up to 159 conditions per place. [2025-03-09 01:23:47,048 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 19 selfloop transitions, 2 changer transitions 0/26 dead transitions. [2025-03-09 01:23:47,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 26 transitions, 106 flow [2025-03-09 01:23:47,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:23:47,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:23:47,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2025-03-09 01:23:47,050 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2025-03-09 01:23:47,050 INFO L175 Difference]: Start difference. First operand has 31 places, 28 transitions, 68 flow. Second operand 4 states and 59 transitions. [2025-03-09 01:23:47,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 26 transitions, 106 flow [2025-03-09 01:23:47,051 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 26 transitions, 98 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-09 01:23:47,051 INFO L231 Difference]: Finished difference. Result has 29 places, 26 transitions, 60 flow [2025-03-09 01:23:47,051 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=56, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=60, PETRI_PLACES=29, PETRI_TRANSITIONS=26} [2025-03-09 01:23:47,052 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -7 predicate places. [2025-03-09 01:23:47,052 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 26 transitions, 60 flow [2025-03-09 01:23:47,052 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2025-03-09 01:23:47,052 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:47,052 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-09 01:23:47,052 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-03-09 01:23:47,052 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:23:47,052 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:47,053 INFO L85 PathProgramCache]: Analyzing trace with hash -1400906314, now seen corresponding path program 1 times [2025-03-09 01:23:47,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:47,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1225874238] [2025-03-09 01:23:47,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:47,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:47,062 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-09 01:23:47,067 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-09 01:23:47,068 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:47,068 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:47,129 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:23:47,129 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:47,129 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1225874238] [2025-03-09 01:23:47,129 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1225874238] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:23:47,129 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:23:47,129 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 01:23:47,129 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41309617] [2025-03-09 01:23:47,129 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:23:47,130 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:23:47,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:47,130 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:23:47,130 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:23:47,140 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:23:47,140 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 29 places, 26 transitions, 60 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:47,140 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:47,141 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:23:47,141 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:47,235 INFO L124 PetriNetUnfolderBase]: 154/300 cut-off events. [2025-03-09 01:23:47,235 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-09 01:23:47,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 599 conditions, 300 events. 154/300 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 24. Compared 1146 event pairs, 101 based on Foata normal form. 0/286 useless extension candidates. Maximal degree in co-relation 394. Up to 192 conditions per place. [2025-03-09 01:23:47,237 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 42 selfloop transitions, 5 changer transitions 0/51 dead transitions. [2025-03-09 01:23:47,237 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 33 places, 51 transitions, 211 flow [2025-03-09 01:23:47,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:23:47,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:23:47,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2025-03-09 01:23:47,238 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5885714285714285 [2025-03-09 01:23:47,239 INFO L175 Difference]: Start difference. First operand has 29 places, 26 transitions, 60 flow. Second operand 5 states and 103 transitions. [2025-03-09 01:23:47,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 33 places, 51 transitions, 211 flow [2025-03-09 01:23:47,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 51 transitions, 207 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:23:47,240 INFO L231 Difference]: Finished difference. Result has 34 places, 30 transitions, 94 flow [2025-03-09 01:23:47,240 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=57, PETRI_DIFFERENCE_MINUEND_PLACES=27, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=94, PETRI_PLACES=34, PETRI_TRANSITIONS=30} [2025-03-09 01:23:47,241 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2025-03-09 01:23:47,241 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 30 transitions, 94 flow [2025-03-09 01:23:47,241 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:47,241 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:47,241 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:23:47,242 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-09 01:23:47,242 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:23:47,242 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:47,242 INFO L85 PathProgramCache]: Analyzing trace with hash -1976187604, now seen corresponding path program 1 times [2025-03-09 01:23:47,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:47,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555523490] [2025-03-09 01:23:47,242 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:47,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:47,247 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-09 01:23:47,250 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-09 01:23:47,250 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:47,250 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:47,298 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:23:47,298 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:47,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555523490] [2025-03-09 01:23:47,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555523490] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:23:47,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:23:47,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 01:23:47,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047564269] [2025-03-09 01:23:47,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:23:47,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:23:47,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:47,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:23:47,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:23:47,310 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:23:47,311 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 30 transitions, 94 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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) [2025-03-09 01:23:47,311 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:47,311 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:23:47,311 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:47,388 INFO L124 PetriNetUnfolderBase]: 130/257 cut-off events. [2025-03-09 01:23:47,388 INFO L125 PetriNetUnfolderBase]: For 74/86 co-relation queries the response was YES. [2025-03-09 01:23:47,389 INFO L83 FinitePrefix]: Finished finitePrefix Result has 586 conditions, 257 events. 130/257 cut-off events. For 74/86 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 917 event pairs, 96 based on Foata normal form. 0/245 useless extension candidates. Maximal degree in co-relation 427. Up to 190 conditions per place. [2025-03-09 01:23:47,390 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 35 selfloop transitions, 5 changer transitions 0/44 dead transitions. [2025-03-09 01:23:47,390 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 44 transitions, 215 flow [2025-03-09 01:23:47,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:23:47,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:23:47,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2025-03-09 01:23:47,393 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5485714285714286 [2025-03-09 01:23:47,393 INFO L175 Difference]: Start difference. First operand has 34 places, 30 transitions, 94 flow. Second operand 5 states and 96 transitions. [2025-03-09 01:23:47,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 44 transitions, 215 flow [2025-03-09 01:23:47,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 37 places, 44 transitions, 213 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:23:47,396 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 117 flow [2025-03-09 01:23:47,396 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=92, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=117, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2025-03-09 01:23:47,396 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2025-03-09 01:23:47,396 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 117 flow [2025-03-09 01:23:47,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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) [2025-03-09 01:23:47,397 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:47,397 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:23:47,397 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-03-09 01:23:47,397 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:23:47,397 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:47,397 INFO L85 PathProgramCache]: Analyzing trace with hash 422842717, now seen corresponding path program 1 times [2025-03-09 01:23:47,397 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:47,397 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1714530127] [2025-03-09 01:23:47,397 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:47,397 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:47,405 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-09 01:23:47,409 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-09 01:23:47,409 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:47,409 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:47,554 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:23:47,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:47,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1714530127] [2025-03-09 01:23:47,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1714530127] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:23:47,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [76233072] [2025-03-09 01:23:47,555 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:47,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:23:47,556 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:23:47,558 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:23:47,559 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-09 01:23:47,598 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-09 01:23:47,610 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-09 01:23:47,610 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:47,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:47,615 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-09 01:23:47,618 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:23:47,647 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 [2025-03-09 01:23:47,689 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:23:47,689 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:23:47,742 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:23:47,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [76233072] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-09 01:23:47,743 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:23:47,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 6 [2025-03-09 01:23:47,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2087358410] [2025-03-09 01:23:47,743 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:23:47,743 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:23:47,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:47,744 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:23:47,744 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2025-03-09 01:23:47,777 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:23:47,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 117 flow. Second operand has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:47,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:47,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:23:47,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:47,891 INFO L124 PetriNetUnfolderBase]: 160/309 cut-off events. [2025-03-09 01:23:47,891 INFO L125 PetriNetUnfolderBase]: For 119/135 co-relation queries the response was YES. [2025-03-09 01:23:47,892 INFO L83 FinitePrefix]: Finished finitePrefix Result has 769 conditions, 309 events. 160/309 cut-off events. For 119/135 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1199 event pairs, 75 based on Foata normal form. 0/292 useless extension candidates. Maximal degree in co-relation 578. Up to 130 conditions per place. [2025-03-09 01:23:47,893 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 38 selfloop transitions, 8 changer transitions 0/50 dead transitions. [2025-03-09 01:23:47,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 50 transitions, 256 flow [2025-03-09 01:23:47,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:23:47,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:23:47,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 113 transitions. [2025-03-09 01:23:47,894 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5380952380952381 [2025-03-09 01:23:47,894 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 117 flow. Second operand 6 states and 113 transitions. [2025-03-09 01:23:47,894 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 50 transitions, 256 flow [2025-03-09 01:23:47,895 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 50 transitions, 251 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:23:47,895 INFO L231 Difference]: Finished difference. Result has 44 places, 34 transitions, 149 flow [2025-03-09 01:23:47,896 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=112, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=149, PETRI_PLACES=44, PETRI_TRANSITIONS=34} [2025-03-09 01:23:47,896 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 8 predicate places. [2025-03-09 01:23:47,896 INFO L471 AbstractCegarLoop]: Abstraction has has 44 places, 34 transitions, 149 flow [2025-03-09 01:23:47,896 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 12.166666666666666) internal successors, (73), 6 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:47,896 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:47,896 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:23:47,903 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-03-09 01:23:48,101 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-03-09 01:23:48,101 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:23:48,102 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:48,102 INFO L85 PathProgramCache]: Analyzing trace with hash -1700025581, now seen corresponding path program 1 times [2025-03-09 01:23:48,102 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:48,102 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214651770] [2025-03-09 01:23:48,102 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:48,102 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:48,108 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-09 01:23:48,116 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 01:23:48,116 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:48,116 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:48,248 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:23:48,248 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:48,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214651770] [2025-03-09 01:23:48,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214651770] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:23:48,248 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169145108] [2025-03-09 01:23:48,248 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:48,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:23:48,248 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:23:48,251 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:23:48,252 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-09 01:23:48,291 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-09 01:23:48,301 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 01:23:48,302 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:48,302 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:48,302 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-09 01:23:48,304 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:23:48,358 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:23:48,359 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:23:48,398 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 18 [2025-03-09 01:23:48,413 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:23:48,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169145108] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:23:48,413 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:23:48,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 7 [2025-03-09 01:23:48,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [523005412] [2025-03-09 01:23:48,414 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:23:48,414 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2025-03-09 01:23:48,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:48,414 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2025-03-09 01:23:48,414 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2025-03-09 01:23:48,483 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:23:48,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 44 places, 34 transitions, 149 flow. Second operand has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 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) [2025-03-09 01:23:48,484 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:48,484 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:23:48,484 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:48,651 INFO L124 PetriNetUnfolderBase]: 240/446 cut-off events. [2025-03-09 01:23:48,651 INFO L125 PetriNetUnfolderBase]: For 575/631 co-relation queries the response was YES. [2025-03-09 01:23:48,652 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1283 conditions, 446 events. 240/446 cut-off events. For 575/631 co-relation queries the response was YES. Maximal size of possible extension queue 23. Compared 1726 event pairs, 88 based on Foata normal form. 0/427 useless extension candidates. Maximal degree in co-relation 1079. Up to 179 conditions per place. [2025-03-09 01:23:48,654 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 51 selfloop transitions, 9 changer transitions 0/64 dead transitions. [2025-03-09 01:23:48,654 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 64 transitions, 389 flow [2025-03-09 01:23:48,655 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-09 01:23:48,655 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-09 01:23:48,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 132 transitions. [2025-03-09 01:23:48,656 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5387755102040817 [2025-03-09 01:23:48,656 INFO L175 Difference]: Start difference. First operand has 44 places, 34 transitions, 149 flow. Second operand 7 states and 132 transitions. [2025-03-09 01:23:48,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 64 transitions, 389 flow [2025-03-09 01:23:48,657 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 64 transitions, 375 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-03-09 01:23:48,658 INFO L231 Difference]: Finished difference. Result has 49 places, 37 transitions, 180 flow [2025-03-09 01:23:48,658 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=139, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=180, PETRI_PLACES=49, PETRI_TRANSITIONS=37} [2025-03-09 01:23:48,662 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 13 predicate places. [2025-03-09 01:23:48,662 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 37 transitions, 180 flow [2025-03-09 01:23:48,663 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 12.666666666666666) internal successors, (114), 9 states have internal predecessors, (114), 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) [2025-03-09 01:23:48,663 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:48,663 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:23:48,669 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2025-03-09 01:23:48,863 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-03-09 01:23:48,864 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:23:48,864 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:48,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1419887618, now seen corresponding path program 1 times [2025-03-09 01:23:48,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:48,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49797648] [2025-03-09 01:23:48,864 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:48,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:48,869 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-09 01:23:48,874 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-09 01:23:48,874 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:48,874 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:48,936 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:23:48,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:48,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49797648] [2025-03-09 01:23:48,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49797648] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:23:48,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [558257599] [2025-03-09 01:23:48,936 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:48,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:23:48,937 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:23:48,938 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:23:48,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-09 01:23:48,974 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-09 01:23:48,985 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-09 01:23:48,986 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:48,986 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:48,986 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:23:48,987 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:23:49,043 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:23:49,043 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:23:49,091 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:23:49,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [558257599] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:23:49,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:23:49,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-09 01:23:49,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510407349] [2025-03-09 01:23:49,092 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:23:49,092 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-09 01:23:49,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:49,092 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-09 01:23:49,092 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-03-09 01:23:49,137 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:23:49,137 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 37 transitions, 180 flow. Second operand has 14 states, 14 states have (on average 13.142857142857142) internal successors, (184), 14 states have internal predecessors, (184), 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) [2025-03-09 01:23:49,137 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:49,137 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:23:49,137 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:49,370 INFO L124 PetriNetUnfolderBase]: 481/891 cut-off events. [2025-03-09 01:23:49,371 INFO L125 PetriNetUnfolderBase]: For 1078/1106 co-relation queries the response was YES. [2025-03-09 01:23:49,373 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2781 conditions, 891 events. 481/891 cut-off events. For 1078/1106 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4003 event pairs, 252 based on Foata normal form. 18/908 useless extension candidates. Maximal degree in co-relation 1410. Up to 410 conditions per place. [2025-03-09 01:23:49,379 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 70 selfloop transitions, 13 changer transitions 0/87 dead transitions. [2025-03-09 01:23:49,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 87 transitions, 577 flow [2025-03-09 01:23:49,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-09 01:23:49,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-09 01:23:49,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2025-03-09 01:23:49,380 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2025-03-09 01:23:49,380 INFO L175 Difference]: Start difference. First operand has 49 places, 37 transitions, 180 flow. Second operand 8 states and 152 transitions. [2025-03-09 01:23:49,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 87 transitions, 577 flow [2025-03-09 01:23:49,385 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 52 places, 87 transitions, 556 flow, removed 4 selfloop flow, removed 4 redundant places. [2025-03-09 01:23:49,388 INFO L231 Difference]: Finished difference. Result has 57 places, 44 transitions, 271 flow [2025-03-09 01:23:49,388 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=168, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=37, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=271, PETRI_PLACES=57, PETRI_TRANSITIONS=44} [2025-03-09 01:23:49,388 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 21 predicate places. [2025-03-09 01:23:49,388 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 44 transitions, 271 flow [2025-03-09 01:23:49,388 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.142857142857142) internal successors, (184), 14 states have internal predecessors, (184), 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) [2025-03-09 01:23:49,388 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:49,389 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:23:49,396 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-09 01:23:49,589 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:23:49,589 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:23:49,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:49,590 INFO L85 PathProgramCache]: Analyzing trace with hash -1974985223, now seen corresponding path program 1 times [2025-03-09 01:23:49,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:49,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866451904] [2025-03-09 01:23:49,590 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:49,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:49,594 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-09 01:23:49,597 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-09 01:23:49,597 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:49,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:49,611 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:23:49,611 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:49,611 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866451904] [2025-03-09 01:23:49,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1866451904] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:23:49,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:23:49,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:23:49,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080401064] [2025-03-09 01:23:49,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:23:49,612 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:23:49,612 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:49,612 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:23:49,613 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:23:49,613 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-03-09 01:23:49,613 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 44 transitions, 271 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2025-03-09 01:23:49,613 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:49,613 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-03-09 01:23:49,613 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:49,753 INFO L124 PetriNetUnfolderBase]: 436/854 cut-off events. [2025-03-09 01:23:49,754 INFO L125 PetriNetUnfolderBase]: For 2080/2164 co-relation queries the response was YES. [2025-03-09 01:23:49,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2900 conditions, 854 events. 436/854 cut-off events. For 2080/2164 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 4251 event pairs, 122 based on Foata normal form. 3/854 useless extension candidates. Maximal degree in co-relation 1407. Up to 526 conditions per place. [2025-03-09 01:23:49,760 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 45 selfloop transitions, 3 changer transitions 6/59 dead transitions. [2025-03-09 01:23:49,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 59 transitions, 458 flow [2025-03-09 01:23:49,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:23:49,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:23:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2025-03-09 01:23:49,760 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2025-03-09 01:23:49,760 INFO L175 Difference]: Start difference. First operand has 57 places, 44 transitions, 271 flow. Second operand 3 states and 71 transitions. [2025-03-09 01:23:49,761 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 59 transitions, 458 flow [2025-03-09 01:23:49,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 445 flow, removed 5 selfloop flow, removed 1 redundant places. [2025-03-09 01:23:49,764 INFO L231 Difference]: Finished difference. Result has 59 places, 41 transitions, 240 flow [2025-03-09 01:23:49,765 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=240, PETRI_PLACES=59, PETRI_TRANSITIONS=41} [2025-03-09 01:23:49,766 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2025-03-09 01:23:49,766 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 41 transitions, 240 flow [2025-03-09 01:23:49,766 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2025-03-09 01:23:49,766 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:49,766 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:23:49,766 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2025-03-09 01:23:49,766 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:23:49,766 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:49,767 INFO L85 PathProgramCache]: Analyzing trace with hash -900440471, now seen corresponding path program 2 times [2025-03-09 01:23:49,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:49,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1641976113] [2025-03-09 01:23:49,767 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:23:49,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:49,773 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-09 01:23:49,786 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-09 01:23:49,788 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:23:49,788 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:49,980 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:23:49,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:49,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1641976113] [2025-03-09 01:23:49,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1641976113] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:23:49,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932838587] [2025-03-09 01:23:49,980 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:23:49,980 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:23:49,980 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:23:49,982 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:23:49,984 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-09 01:23:50,018 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-09 01:23:50,031 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-09 01:23:50,031 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:23:50,031 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:50,032 INFO L256 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-09 01:23:50,033 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:23:50,158 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:23:50,158 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:23:50,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-03-09 01:23:50,307 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:23:50,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932838587] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:23:50,307 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:23:50,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2025-03-09 01:23:50,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1618340366] [2025-03-09 01:23:50,307 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:23:50,307 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-09 01:23:50,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:50,308 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-09 01:23:50,308 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2025-03-09 01:23:50,623 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-09 01:23:50,623 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 41 transitions, 240 flow. Second operand has 20 states, 20 states have (on average 12.05) internal successors, (241), 20 states have internal predecessors, (241), 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) [2025-03-09 01:23:50,623 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:50,623 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-09 01:23:50,623 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:51,366 INFO L124 PetriNetUnfolderBase]: 673/1179 cut-off events. [2025-03-09 01:23:51,366 INFO L125 PetriNetUnfolderBase]: For 1887/1959 co-relation queries the response was YES. [2025-03-09 01:23:51,369 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4204 conditions, 1179 events. 673/1179 cut-off events. For 1887/1959 co-relation queries the response was YES. Maximal size of possible extension queue 51. Compared 5407 event pairs, 120 based on Foata normal form. 36/1215 useless extension candidates. Maximal degree in co-relation 2710. Up to 195 conditions per place. [2025-03-09 01:23:51,375 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 128 selfloop transitions, 18 changer transitions 0/149 dead transitions. [2025-03-09 01:23:51,375 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 149 transitions, 1042 flow [2025-03-09 01:23:51,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-09 01:23:51,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-09 01:23:51,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 254 transitions. [2025-03-09 01:23:51,377 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5183673469387755 [2025-03-09 01:23:51,377 INFO L175 Difference]: Start difference. First operand has 59 places, 41 transitions, 240 flow. Second operand 14 states and 254 transitions. [2025-03-09 01:23:51,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 149 transitions, 1042 flow [2025-03-09 01:23:51,383 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 149 transitions, 976 flow, removed 28 selfloop flow, removed 4 redundant places. [2025-03-09 01:23:51,385 INFO L231 Difference]: Finished difference. Result has 65 places, 45 transitions, 292 flow [2025-03-09 01:23:51,385 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=292, PETRI_PLACES=65, PETRI_TRANSITIONS=45} [2025-03-09 01:23:51,386 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 29 predicate places. [2025-03-09 01:23:51,386 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 45 transitions, 292 flow [2025-03-09 01:23:51,386 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.05) internal successors, (241), 20 states have internal predecessors, (241), 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) [2025-03-09 01:23:51,386 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:51,386 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:23:51,392 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-09 01:23:51,591 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:23:51,591 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:23:51,591 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:51,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1196600136, now seen corresponding path program 1 times [2025-03-09 01:23:51,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:51,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244019219] [2025-03-09 01:23:51,592 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:51,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:51,598 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-09 01:23:51,603 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-09 01:23:51,603 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:51,603 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:23:51,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:51,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244019219] [2025-03-09 01:23:51,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244019219] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:23:51,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [448503055] [2025-03-09 01:23:51,665 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:51,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:23:51,665 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:23:51,667 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:23:51,668 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-09 01:23:51,705 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-09 01:23:51,716 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-09 01:23:51,716 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:51,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:51,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:23:51,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:23:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:23:51,768 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:23:51,812 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:23:51,812 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [448503055] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:23:51,812 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:23:51,812 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-09 01:23:51,812 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127480695] [2025-03-09 01:23:51,812 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:23:51,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-09 01:23:51,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:51,813 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-09 01:23:51,813 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=127, Unknown=0, NotChecked=0, Total=182 [2025-03-09 01:23:51,846 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:23:51,847 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 45 transitions, 292 flow. Second operand has 14 states, 14 states have (on average 13.285714285714286) internal successors, (186), 14 states have internal predecessors, (186), 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) [2025-03-09 01:23:51,847 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:51,847 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:23:51,847 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:52,027 INFO L124 PetriNetUnfolderBase]: 607/1075 cut-off events. [2025-03-09 01:23:52,027 INFO L125 PetriNetUnfolderBase]: For 2742/2760 co-relation queries the response was YES. [2025-03-09 01:23:52,030 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3872 conditions, 1075 events. 607/1075 cut-off events. For 2742/2760 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 4778 event pairs, 380 based on Foata normal form. 13/1084 useless extension candidates. Maximal degree in co-relation 2725. Up to 727 conditions per place. [2025-03-09 01:23:52,034 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 66 selfloop transitions, 10 changer transitions 0/81 dead transitions. [2025-03-09 01:23:52,034 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 81 transitions, 638 flow [2025-03-09 01:23:52,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-09 01:23:52,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-09 01:23:52,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 149 transitions. [2025-03-09 01:23:52,058 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5321428571428571 [2025-03-09 01:23:52,058 INFO L175 Difference]: Start difference. First operand has 65 places, 45 transitions, 292 flow. Second operand 8 states and 149 transitions. [2025-03-09 01:23:52,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 81 transitions, 638 flow [2025-03-09 01:23:52,061 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 61 places, 81 transitions, 547 flow, removed 10 selfloop flow, removed 11 redundant places. [2025-03-09 01:23:52,064 INFO L231 Difference]: Finished difference. Result has 64 places, 49 transitions, 296 flow [2025-03-09 01:23:52,064 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=235, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=296, PETRI_PLACES=64, PETRI_TRANSITIONS=49} [2025-03-09 01:23:52,064 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 28 predicate places. [2025-03-09 01:23:52,064 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 49 transitions, 296 flow [2025-03-09 01:23:52,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 13.285714285714286) internal successors, (186), 14 states have internal predecessors, (186), 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) [2025-03-09 01:23:52,064 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:52,065 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:23:52,072 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2025-03-09 01:23:52,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-03-09 01:23:52,265 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:23:52,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:52,266 INFO L85 PathProgramCache]: Analyzing trace with hash -1943867041, now seen corresponding path program 2 times [2025-03-09 01:23:52,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:52,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117050643] [2025-03-09 01:23:52,266 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:23:52,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:52,271 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-09 01:23:52,282 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-09 01:23:52,282 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:23:52,282 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:52,458 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-09 01:23:52,458 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:52,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117050643] [2025-03-09 01:23:52,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1117050643] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:23:52,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1324894596] [2025-03-09 01:23:52,458 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:23:52,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:23:52,458 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:23:52,460 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:23:52,461 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-09 01:23:52,502 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-09 01:23:52,515 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-09 01:23:52,515 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:23:52,515 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:52,516 INFO L256 TraceCheckSpWp]: Trace formula consists of 136 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-09 01:23:52,517 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:23:52,625 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:23:52,625 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:23:52,710 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2025-03-09 01:23:52,748 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:23:52,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1324894596] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:23:52,748 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-09 01:23:52,748 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 18 [2025-03-09 01:23:52,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61077640] [2025-03-09 01:23:52,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-09 01:23:52,749 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-09 01:23:52,749 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:52,749 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-09 01:23:52,750 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2025-03-09 01:23:53,045 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-09 01:23:53,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 49 transitions, 296 flow. Second operand has 20 states, 20 states have (on average 12.35) internal successors, (247), 20 states have internal predecessors, (247), 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) [2025-03-09 01:23:53,046 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:53,046 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-09 01:23:53,046 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:53,718 INFO L124 PetriNetUnfolderBase]: 782/1306 cut-off events. [2025-03-09 01:23:53,718 INFO L125 PetriNetUnfolderBase]: For 2056/2080 co-relation queries the response was YES. [2025-03-09 01:23:53,720 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4576 conditions, 1306 events. 782/1306 cut-off events. For 2056/2080 co-relation queries the response was YES. Maximal size of possible extension queue 40. Compared 5497 event pairs, 122 based on Foata normal form. 46/1350 useless extension candidates. Maximal degree in co-relation 3440. Up to 262 conditions per place. [2025-03-09 01:23:53,725 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 122 selfloop transitions, 18 changer transitions 0/144 dead transitions. [2025-03-09 01:23:53,725 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 144 transitions, 1062 flow [2025-03-09 01:23:53,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-09 01:23:53,726 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-09 01:23:53,726 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 247 transitions. [2025-03-09 01:23:53,727 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5040816326530613 [2025-03-09 01:23:53,727 INFO L175 Difference]: Start difference. First operand has 64 places, 49 transitions, 296 flow. Second operand 14 states and 247 transitions. [2025-03-09 01:23:53,727 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 144 transitions, 1062 flow [2025-03-09 01:23:53,730 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 144 transitions, 1049 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-03-09 01:23:53,731 INFO L231 Difference]: Finished difference. Result has 74 places, 52 transitions, 345 flow [2025-03-09 01:23:53,731 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=279, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=345, PETRI_PLACES=74, PETRI_TRANSITIONS=52} [2025-03-09 01:23:53,732 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 38 predicate places. [2025-03-09 01:23:53,732 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 52 transitions, 345 flow [2025-03-09 01:23:53,732 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 12.35) internal successors, (247), 20 states have internal predecessors, (247), 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) [2025-03-09 01:23:53,732 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:53,732 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] [2025-03-09 01:23:53,739 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-09 01:23:53,937 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:23:53,937 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:23:53,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:53,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1853754359, now seen corresponding path program 1 times [2025-03-09 01:23:53,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:53,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763223818] [2025-03-09 01:23:53,937 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:53,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:53,941 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-09 01:23:53,945 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-09 01:23:53,945 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:53,945 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:53,981 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:23:53,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:53,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763223818] [2025-03-09 01:23:53,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [763223818] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:23:53,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643597724] [2025-03-09 01:23:53,982 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:53,982 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:23:53,982 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:23:53,984 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:23:53,985 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-09 01:23:54,019 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-09 01:23:54,032 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-09 01:23:54,032 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:54,032 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:54,033 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-09 01:23:54,034 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:23:54,058 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:23:54,058 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:23:54,082 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:23:54,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643597724] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-09 01:23:54,082 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:23:54,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-03-09 01:23:54,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508269850] [2025-03-09 01:23:54,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:23:54,083 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:23:54,083 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:54,083 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:23:54,083 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-09 01:23:54,092 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:23:54,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 52 transitions, 345 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:54,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:54,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:23:54,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:54,203 INFO L124 PetriNetUnfolderBase]: 732/1241 cut-off events. [2025-03-09 01:23:54,203 INFO L125 PetriNetUnfolderBase]: For 2954/2978 co-relation queries the response was YES. [2025-03-09 01:23:54,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4651 conditions, 1241 events. 732/1241 cut-off events. For 2954/2978 co-relation queries the response was YES. Maximal size of possible extension queue 41. Compared 5311 event pairs, 171 based on Foata normal form. 42/1281 useless extension candidates. Maximal degree in co-relation 3593. Up to 774 conditions per place. [2025-03-09 01:23:54,211 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 55 selfloop transitions, 10 changer transitions 0/69 dead transitions. [2025-03-09 01:23:54,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 78 places, 69 transitions, 565 flow [2025-03-09 01:23:54,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:23:54,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:23:54,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 87 transitions. [2025-03-09 01:23:54,212 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.49714285714285716 [2025-03-09 01:23:54,212 INFO L175 Difference]: Start difference. First operand has 74 places, 52 transitions, 345 flow. Second operand 5 states and 87 transitions. [2025-03-09 01:23:54,213 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 78 places, 69 transitions, 565 flow [2025-03-09 01:23:54,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 69 transitions, 521 flow, removed 8 selfloop flow, removed 11 redundant places. [2025-03-09 01:23:54,217 INFO L231 Difference]: Finished difference. Result has 69 places, 52 transitions, 325 flow [2025-03-09 01:23:54,217 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=278, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=325, PETRI_PLACES=69, PETRI_TRANSITIONS=52} [2025-03-09 01:23:54,217 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 33 predicate places. [2025-03-09 01:23:54,218 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 52 transitions, 325 flow [2025-03-09 01:23:54,218 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:54,218 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:54,218 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] [2025-03-09 01:23:54,224 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-09 01:23:54,418 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:23:54,418 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:23:54,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:54,419 INFO L85 PathProgramCache]: Analyzing trace with hash -1749166277, now seen corresponding path program 1 times [2025-03-09 01:23:54,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:54,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26872540] [2025-03-09 01:23:54,419 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:54,419 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:54,423 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-09 01:23:54,426 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-09 01:23:54,426 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:54,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:54,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:23:54,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-09 01:23:54,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26872540] [2025-03-09 01:23:54,468 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26872540] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-09 01:23:54,468 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2126847366] [2025-03-09 01:23:54,468 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:54,469 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:23:54,469 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:23:54,470 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:23:54,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-09 01:23:54,508 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-09 01:23:54,526 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-09 01:23:54,526 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:54,526 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:23:54,527 INFO L256 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 6 conjuncts are in the unsatisfiable core [2025-03-09 01:23:54,528 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:23:54,553 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:23:54,554 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:23:54,586 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-09 01:23:54,586 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2126847366] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-09 01:23:54,586 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:23:54,586 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4, 4] total 8 [2025-03-09 01:23:54,586 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845959978] [2025-03-09 01:23:54,586 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:23:54,586 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:23:54,586 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-09 01:23:54,587 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:23:54,587 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-09 01:23:54,596 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:23:54,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 52 transitions, 325 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:54,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:23:54,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:23:54,596 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:23:54,728 INFO L124 PetriNetUnfolderBase]: 674/1178 cut-off events. [2025-03-09 01:23:54,729 INFO L125 PetriNetUnfolderBase]: For 3018/3032 co-relation queries the response was YES. [2025-03-09 01:23:54,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4305 conditions, 1178 events. 674/1178 cut-off events. For 3018/3032 co-relation queries the response was YES. Maximal size of possible extension queue 36. Compared 5103 event pairs, 181 based on Foata normal form. 38/1189 useless extension candidates. Maximal degree in co-relation 3482. Up to 738 conditions per place. [2025-03-09 01:23:54,737 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 52 selfloop transitions, 10 changer transitions 0/67 dead transitions. [2025-03-09 01:23:54,738 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 67 transitions, 542 flow [2025-03-09 01:23:54,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:23:54,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:23:54,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 88 transitions. [2025-03-09 01:23:54,738 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5028571428571429 [2025-03-09 01:23:54,738 INFO L175 Difference]: Start difference. First operand has 69 places, 52 transitions, 325 flow. Second operand 5 states and 88 transitions. [2025-03-09 01:23:54,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 67 transitions, 542 flow [2025-03-09 01:23:54,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 67 transitions, 519 flow, removed 4 selfloop flow, removed 2 redundant places. [2025-03-09 01:23:54,744 INFO L231 Difference]: Finished difference. Result has 72 places, 51 transitions, 332 flow [2025-03-09 01:23:54,744 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=293, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=332, PETRI_PLACES=72, PETRI_TRANSITIONS=51} [2025-03-09 01:23:54,745 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 36 predicate places. [2025-03-09 01:23:54,745 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 51 transitions, 332 flow [2025-03-09 01:23:54,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:23:54,745 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:23:54,745 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] [2025-03-09 01:23:54,751 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2025-03-09 01:23:54,946 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-03-09 01:23:54,946 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:23:54,946 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:23:54,946 INFO L85 PathProgramCache]: Analyzing trace with hash 1651282932, now seen corresponding path program 1 times [2025-03-09 01:23:54,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-09 01:23:54,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438842097] [2025-03-09 01:23:54,947 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:23:54,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-09 01:23:54,952 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-09 01:23:54,967 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-09 01:23:54,967 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:54,967 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-09 01:23:54,967 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-09 01:23:54,971 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-09 01:23:54,984 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-09 01:23:54,984 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:23:54,984 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-09 01:23:54,998 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-03-09 01:23:54,999 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-09 01:23:54,999 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (13 of 14 remaining) [2025-03-09 01:23:55,000 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2025-03-09 01:23:55,001 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2025-03-09 01:23:55,001 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2025-03-09 01:23:55,001 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2025-03-09 01:23:55,001 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2025-03-09 01:23:55,001 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2025-03-09 01:23:55,001 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 14 remaining) [2025-03-09 01:23:55,001 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 14 remaining) [2025-03-09 01:23:55,001 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 14 remaining) [2025-03-09 01:23:55,001 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2025-03-09 01:23:55,001 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2025-03-09 01:23:55,001 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 14 remaining) [2025-03-09 01:23:55,002 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 14 remaining) [2025-03-09 01:23:55,002 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2025-03-09 01:23:55,002 INFO L422 BasicCegarLoop]: Path program histogram: [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:23:55,049 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-03-09 01:23:55,049 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-09 01:23:55,052 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.03 01:23:55 BasicIcfg [2025-03-09 01:23:55,053 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-09 01:23:55,053 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-09 01:23:55,053 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-09 01:23:55,053 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-09 01:23:55,054 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:23:46" (3/4) ... [2025-03-09 01:23:55,055 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-03-09 01:23:55,056 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-09 01:23:55,056 INFO L158 Benchmark]: Toolchain (without parser) took 9725.07ms. Allocated memory was 142.6MB in the beginning and 385.9MB in the end (delta: 243.3MB). Free memory was 107.8MB in the beginning and 271.1MB in the end (delta: -163.3MB). Peak memory consumption was 76.6MB. Max. memory is 16.1GB. [2025-03-09 01:23:55,056 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 201.3MB. Free memory is still 115.6MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 01:23:55,056 INFO L158 Benchmark]: CACSL2BoogieTranslator took 165.37ms. Allocated memory is still 142.6MB. Free memory was 107.8MB in the beginning and 96.1MB in the end (delta: 11.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-09 01:23:55,057 INFO L158 Benchmark]: Boogie Procedure Inliner took 26.95ms. Allocated memory is still 142.6MB. Free memory was 96.1MB in the beginning and 94.4MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 01:23:55,057 INFO L158 Benchmark]: Boogie Preprocessor took 25.39ms. Allocated memory is still 142.6MB. Free memory was 94.4MB in the beginning and 92.5MB in the end (delta: 1.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-09 01:23:55,057 INFO L158 Benchmark]: IcfgBuilder took 459.04ms. Allocated memory is still 142.6MB. Free memory was 92.5MB in the beginning and 51.5MB in the end (delta: 41.0MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. [2025-03-09 01:23:55,057 INFO L158 Benchmark]: TraceAbstraction took 9039.98ms. Allocated memory was 142.6MB in the beginning and 385.9MB in the end (delta: 243.3MB). Free memory was 50.5MB in the beginning and 271.1MB in the end (delta: -220.6MB). Peak memory consumption was 17.9MB. Max. memory is 16.1GB. [2025-03-09 01:23:55,057 INFO L158 Benchmark]: Witness Printer took 2.48ms. Allocated memory is still 385.9MB. Free memory was 271.1MB in the beginning and 271.1MB in the end (delta: 63.1kB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 01:23:55,058 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 201.3MB. Free memory is still 115.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 165.37ms. Allocated memory is still 142.6MB. Free memory was 107.8MB in the beginning and 96.1MB in the end (delta: 11.7MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 26.95ms. Allocated memory is still 142.6MB. Free memory was 96.1MB in the beginning and 94.4MB in the end (delta: 1.7MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 25.39ms. Allocated memory is still 142.6MB. Free memory was 94.4MB in the beginning and 92.5MB in the end (delta: 1.9MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * IcfgBuilder took 459.04ms. Allocated memory is still 142.6MB. Free memory was 92.5MB in the beginning and 51.5MB in the end (delta: 41.0MB). Peak memory consumption was 41.9MB. Max. memory is 16.1GB. * TraceAbstraction took 9039.98ms. Allocated memory was 142.6MB in the beginning and 385.9MB in the end (delta: 243.3MB). Free memory was 50.5MB in the beginning and 271.1MB in the end (delta: -220.6MB). Peak memory consumption was 17.9MB. Max. memory is 16.1GB. * Witness Printer took 2.48ms. Allocated memory is still 385.9MB. Free memory was 271.1MB in the beginning and 271.1MB in the end (delta: 63.1kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 21. Possible FailurePath: [L39] 0 int* A; [L40] 0 _Atomic int counter; [L41] 0 int N; [L66] 0 pthread_t t1, t2; [L68] 0 N = __VERIFIER_nondet_int() [L69] CALL, EXPR 0 create_fresh_int_array(N) [L84] CALL 0 assume_abort_if_not(size >= 0) [L36] COND FALSE 0 !(!cond) [L84] RET 0 assume_abort_if_not(size >= 0) [L85] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L36] COND FALSE 0 !(!cond) [L85] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L87] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L88] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={-3:0}, counter=0, i=0, size=1] [L88] COND TRUE 0 i < size [L89] 0 arr[i] = __VERIFIER_nondet_int() [L88] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={-3:0}, counter=0, i=1, size=1] [L88] COND FALSE 0 !(i < size) [L91] 0 return arr; [L69] RET, EXPR 0 create_fresh_int_array(N) [L69] 0 A = create_fresh_int_array(N) [L72] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={-3:0}, N=1, counter=0, t1=-5] [L73] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={-3:0}, N=1, counter=0, t1=-5, t2=-4] [L57] 2 int i=0; VAL [A={-3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=0, i=0] [L57] COND TRUE 2 i= b - 2147483648) [L36] COND FALSE 2 !(!cond) [L95] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L96] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L36] COND FALSE 2 !(!cond) [L96] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L97] 2 return a - b; [L58] RET, EXPR 2 minus(counter, A[i]) [L58] 2 int tmp = minus(counter, A[i]); [L48] 1 int i=0; VAL [A={-3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=0, i=0] [L48] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L36] COND FALSE 1 !(!cond) [L101] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L102] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L36] COND FALSE 1 !(!cond) [L102] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L103] 1 return a + b; [L49] RET, EXPR 1 plus(counter, A[i]) [L49] 1 int tmp = plus(counter, A[i]); [L50] 1 counter = tmp VAL [A={-3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=5, i=0, tmp=5] [L59] 2 counter = tmp VAL [A={-3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=-5, i=0, tmp=-5] [L48] 1 i++ VAL [A={-3:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=-5, i=1] [L48] COND FALSE 1 !(i main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 387879bf92b16ead997b40b3e249348f8a6b399496756f9bc3c41b6dc3c21353 [2025-03-09 01:23:57,337 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-09 01:23:57,345 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-09 01:23:57,347 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-09 01:23:57,349 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-09 01:23:57,349 INFO L274 PluginConnector]: CDTParser initialized [2025-03-09 01:23:57,350 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2025-03-09 01:23:58,550 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9bf0367a/8a32e3c9a8e84afd99eee59ed2ec5af0/FLAGef00e0e29 [2025-03-09 01:23:58,765 INFO L384 CDTParser]: Found 1 translation units. [2025-03-09 01:23:58,766 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-counter-queue.wvr.c [2025-03-09 01:23:58,774 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9bf0367a/8a32e3c9a8e84afd99eee59ed2ec5af0/FLAGef00e0e29 [2025-03-09 01:23:59,133 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/a9bf0367a/8a32e3c9a8e84afd99eee59ed2ec5af0 [2025-03-09 01:23:59,135 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-09 01:23:59,136 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-09 01:23:59,137 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-09 01:23:59,137 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-09 01:23:59,139 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-09 01:23:59,140 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:23:59" (1/1) ... [2025-03-09 01:23:59,140 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@15da1dfa and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:59, skipping insertion in model container [2025-03-09 01:23:59,140 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.03 01:23:59" (1/1) ... [2025-03-09 01:23:59,150 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-09 01:23:59,267 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-09 01:23:59,272 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:23:59,280 INFO L200 MainTranslator]: Completed pre-run [2025-03-09 01:23:59,301 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-09 01:23:59,315 INFO L204 MainTranslator]: Completed translation [2025-03-09 01:23:59,315 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:59 WrapperNode [2025-03-09 01:23:59,316 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-09 01:23:59,317 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-09 01:23:59,317 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-09 01:23:59,317 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-09 01:23:59,321 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:59" (1/1) ... [2025-03-09 01:23:59,332 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:59" (1/1) ... [2025-03-09 01:23:59,354 INFO L138 Inliner]: procedures = 25, calls = 23, calls flagged for inlining = 13, calls inlined = 13, statements flattened = 123 [2025-03-09 01:23:59,358 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-09 01:23:59,359 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-09 01:23:59,359 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-09 01:23:59,359 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-09 01:23:59,364 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:59" (1/1) ... [2025-03-09 01:23:59,364 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:59" (1/1) ... [2025-03-09 01:23:59,368 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:59" (1/1) ... [2025-03-09 01:23:59,388 INFO L175 MemorySlicer]: Split 5 memory accesses to 2 slices as follows [2, 3]. 60 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]. [2025-03-09 01:23:59,389 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:59" (1/1) ... [2025-03-09 01:23:59,389 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:59" (1/1) ... [2025-03-09 01:23:59,398 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:59" (1/1) ... [2025-03-09 01:23:59,403 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:59" (1/1) ... [2025-03-09 01:23:59,404 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:59" (1/1) ... [2025-03-09 01:23:59,405 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:59" (1/1) ... [2025-03-09 01:23:59,407 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-09 01:23:59,411 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-09 01:23:59,411 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-09 01:23:59,411 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-09 01:23:59,412 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:59" (1/1) ... [2025-03-09 01:23:59,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-09 01:23:59,430 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:23:59,440 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2025-03-09 01:23:59,442 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2025-03-09 01:23:59,458 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-09 01:23:59,459 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-09 01:23:59,459 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-09 01:23:59,459 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-09 01:23:59,459 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-09 01:23:59,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-03-09 01:23:59,459 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-03-09 01:23:59,459 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-09 01:23:59,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#0 [2025-03-09 01:23:59,459 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE4#1 [2025-03-09 01:23:59,460 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-09 01:23:59,460 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-09 01:23:59,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#0 [2025-03-09 01:23:59,460 INFO L130 BoogieDeclarations]: Found specification of procedure write~intINTTYPE4#1 [2025-03-09 01:23:59,461 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-09 01:23:59,549 INFO L256 CfgBuilder]: Building ICFG [2025-03-09 01:23:59,550 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-09 01:23:59,804 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-09 01:23:59,804 INFO L307 CfgBuilder]: Performing block encoding [2025-03-09 01:23:59,994 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-09 01:23:59,994 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-09 01:23:59,995 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:23:59 BoogieIcfgContainer [2025-03-09 01:23:59,995 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-09 01:23:59,997 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-09 01:23:59,997 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-09 01:24:00,000 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-09 01:24:00,000 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.03 01:23:59" (1/3) ... [2025-03-09 01:24:00,001 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f39d768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:24:00, skipping insertion in model container [2025-03-09 01:24:00,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.03 01:23:59" (2/3) ... [2025-03-09 01:24:00,001 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@f39d768 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.03 01:24:00, skipping insertion in model container [2025-03-09 01:24:00,001 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:23:59" (3/3) ... [2025-03-09 01:24:00,002 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-bad-counter-queue.wvr.c [2025-03-09 01:24:00,012 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-09 01:24:00,014 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-bad-counter-queue.wvr.c that has 3 procedures, 33 locations, 1 initial locations, 3 loop locations, and 8 error locations. [2025-03-09 01:24:00,014 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-09 01:24:00,061 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-09 01:24:00,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 35 transitions, 84 flow [2025-03-09 01:24:00,112 INFO L124 PetriNetUnfolderBase]: 3/33 cut-off events. [2025-03-09 01:24:00,113 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-09 01:24:00,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 3/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 66 event pairs, 0 based on Foata normal form. 0/22 useless extension candidates. Maximal degree in co-relation 21. Up to 2 conditions per place. [2025-03-09 01:24:00,116 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 35 transitions, 84 flow [2025-03-09 01:24:00,118 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 32 transitions, 76 flow [2025-03-09 01:24:00,123 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-09 01:24:00,133 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;@6e85a918, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-09 01:24:00,134 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2025-03-09 01:24:00,137 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-09 01:24:00,137 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-09 01:24:00,137 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-09 01:24:00,138 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:00,138 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:24:00,138 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:00,142 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:00,143 INFO L85 PathProgramCache]: Analyzing trace with hash 380436, now seen corresponding path program 1 times [2025-03-09 01:24:00,150 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:00,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1120833943] [2025-03-09 01:24:00,153 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:00,153 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:00,153 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:00,155 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:00,157 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-09 01:24:00,211 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:24:00,221 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:24:00,221 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:00,222 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:00,224 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 3 conjuncts are in the unsatisfiable core [2025-03-09 01:24:00,226 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:00,279 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-09 01:24:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:00,291 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:24:00,292 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:00,292 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1120833943] [2025-03-09 01:24:00,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1120833943] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:00,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:00,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-09 01:24:00,294 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630587447] [2025-03-09 01:24:00,295 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:00,299 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:24:00,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:00,321 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:24:00,321 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:24:00,335 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:24:00,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2025-03-09 01:24:00,339 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:00,339 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:24:00,340 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:00,441 INFO L124 PetriNetUnfolderBase]: 92/179 cut-off events. [2025-03-09 01:24:00,441 INFO L125 PetriNetUnfolderBase]: For 12/12 co-relation queries the response was YES. [2025-03-09 01:24:00,442 INFO L83 FinitePrefix]: Finished finitePrefix Result has 363 conditions, 179 events. 92/179 cut-off events. For 12/12 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 610 event pairs, 68 based on Foata normal form. 1/168 useless extension candidates. Maximal degree in co-relation 315. Up to 160 conditions per place. [2025-03-09 01:24:00,445 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 19 selfloop transitions, 2 changer transitions 0/29 dead transitions. [2025-03-09 01:24:00,445 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 112 flow [2025-03-09 01:24:00,446 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:24:00,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:24:00,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 56 transitions. [2025-03-09 01:24:00,456 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2025-03-09 01:24:00,457 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 3 states and 56 transitions. [2025-03-09 01:24:00,457 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 112 flow [2025-03-09 01:24:00,460 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 31 places, 29 transitions, 104 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-09 01:24:00,461 INFO L231 Difference]: Finished difference. Result has 31 places, 29 transitions, 66 flow [2025-03-09 01:24:00,463 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=66, PETRI_PLACES=31, PETRI_TRANSITIONS=29} [2025-03-09 01:24:00,465 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -5 predicate places. [2025-03-09 01:24:00,465 INFO L471 AbstractCegarLoop]: Abstraction has has 31 places, 29 transitions, 66 flow [2025-03-09 01:24:00,465 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 12.0) internal successors, (36), 3 states have internal predecessors, (36), 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) [2025-03-09 01:24:00,465 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:00,465 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-09 01:24:00,471 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-09 01:24:00,668 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:00,668 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:00,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:00,669 INFO L85 PathProgramCache]: Analyzing trace with hash 380437, now seen corresponding path program 1 times [2025-03-09 01:24:00,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:00,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [180825059] [2025-03-09 01:24:00,669 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:00,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:00,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:00,671 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:00,672 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-09 01:24:00,710 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-09 01:24:00,716 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-09 01:24:00,716 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:00,716 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:00,717 INFO L256 TraceCheckSpWp]: Trace formula consists of 29 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-03-09 01:24:00,718 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:00,734 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 7 [2025-03-09 01:24:00,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:00,809 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:24:00,809 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:00,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180825059] [2025-03-09 01:24:00,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180825059] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:00,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:00,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:24:00,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677044480] [2025-03-09 01:24:00,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:00,810 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:24:00,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:00,811 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:24:00,811 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:24:00,832 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:24:00,833 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 31 places, 29 transitions, 66 flow. Second operand has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 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) [2025-03-09 01:24:00,833 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:00,833 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:24:00,833 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:00,979 INFO L124 PetriNetUnfolderBase]: 93/182 cut-off events. [2025-03-09 01:24:00,979 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-09 01:24:00,979 INFO L83 FinitePrefix]: Finished finitePrefix Result has 360 conditions, 182 events. 93/182 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 20. Compared 628 event pairs, 68 based on Foata normal form. 0/170 useless extension candidates. Maximal degree in co-relation 338. Up to 165 conditions per place. [2025-03-09 01:24:00,980 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 21 selfloop transitions, 4 changer transitions 0/32 dead transitions. [2025-03-09 01:24:00,980 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 32 transitions, 124 flow [2025-03-09 01:24:00,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:24:00,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:24:00,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 70 transitions. [2025-03-09 01:24:00,986 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-03-09 01:24:00,986 INFO L175 Difference]: Start difference. First operand has 31 places, 29 transitions, 66 flow. Second operand 4 states and 70 transitions. [2025-03-09 01:24:00,986 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 32 transitions, 124 flow [2025-03-09 01:24:00,987 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 32 transitions, 118 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:24:00,988 INFO L231 Difference]: Finished difference. Result has 34 places, 32 transitions, 89 flow [2025-03-09 01:24:00,988 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=29, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=89, PETRI_PLACES=34, PETRI_TRANSITIONS=32} [2025-03-09 01:24:00,988 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2025-03-09 01:24:00,988 INFO L471 AbstractCegarLoop]: Abstraction has has 34 places, 32 transitions, 89 flow [2025-03-09 01:24:00,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 11.75) internal successors, (47), 4 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) [2025-03-09 01:24:00,988 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:00,989 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-09 01:24:00,996 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-09 01:24:01,194 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:01,195 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:01,195 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:01,195 INFO L85 PathProgramCache]: Analyzing trace with hash 365612331, now seen corresponding path program 1 times [2025-03-09 01:24:01,195 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:01,195 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1028969152] [2025-03-09 01:24:01,195 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:01,196 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:01,196 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:01,197 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:01,198 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-09 01:24:01,234 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-09 01:24:01,242 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-09 01:24:01,242 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:01,242 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:01,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 38 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:24:01,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:01,253 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 7 [2025-03-09 01:24:01,363 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:01,364 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:01,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:01,513 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:01,513 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028969152] [2025-03-09 01:24:01,513 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1028969152] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:24:01,513 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:24:01,513 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3] total 6 [2025-03-09 01:24:01,513 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879720392] [2025-03-09 01:24:01,513 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:24:01,513 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-03-09 01:24:01,514 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:01,514 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-03-09 01:24:01,514 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2025-03-09 01:24:01,609 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:24:01,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 32 transitions, 89 flow. Second operand has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:01,610 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:01,610 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:24:01,610 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:02,021 INFO L124 PetriNetUnfolderBase]: 96/191 cut-off events. [2025-03-09 01:24:02,022 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-09 01:24:02,022 INFO L83 FinitePrefix]: Finished finitePrefix Result has 397 conditions, 191 events. 96/191 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 21. Compared 685 event pairs, 68 based on Foata normal form. 0/175 useless extension candidates. Maximal degree in co-relation 345. Up to 168 conditions per place. [2025-03-09 01:24:02,024 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 21 selfloop transitions, 13 changer transitions 0/41 dead transitions. [2025-03-09 01:24:02,024 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 43 places, 41 transitions, 193 flow [2025-03-09 01:24:02,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-09 01:24:02,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-09 01:24:02,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 147 transitions. [2025-03-09 01:24:02,025 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42 [2025-03-09 01:24:02,025 INFO L175 Difference]: Start difference. First operand has 34 places, 32 transitions, 89 flow. Second operand 10 states and 147 transitions. [2025-03-09 01:24:02,026 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 43 places, 41 transitions, 193 flow [2025-03-09 01:24:02,026 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 42 places, 41 transitions, 190 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-09 01:24:02,027 INFO L231 Difference]: Finished difference. Result has 45 places, 41 transitions, 166 flow [2025-03-09 01:24:02,027 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=86, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=166, PETRI_PLACES=45, PETRI_TRANSITIONS=41} [2025-03-09 01:24:02,031 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2025-03-09 01:24:02,032 INFO L471 AbstractCegarLoop]: Abstraction has has 45 places, 41 transitions, 166 flow [2025-03-09 01:24:02,032 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 12.25) internal successors, (98), 8 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:02,032 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:02,032 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-09 01:24:02,038 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-03-09 01:24:02,233 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:02,233 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:02,233 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:02,233 INFO L85 PathProgramCache]: Analyzing trace with hash -1548915947, now seen corresponding path program 1 times [2025-03-09 01:24:02,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:02,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [890125891] [2025-03-09 01:24:02,234 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:02,234 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:02,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:02,236 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:02,237 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-09 01:24:02,271 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-09 01:24:02,276 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-09 01:24:02,277 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:02,277 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:02,278 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-03-09 01:24:02,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:02,282 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-03-09 01:24:02,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:02,298 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:24:02,298 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:02,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890125891] [2025-03-09 01:24:02,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [890125891] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:02,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:02,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:24:02,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123131397] [2025-03-09 01:24:02,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:02,298 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-09 01:24:02,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:02,299 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-09 01:24:02,299 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-09 01:24:02,323 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 9 out of 35 [2025-03-09 01:24:02,324 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 41 transitions, 166 flow. Second operand has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2025-03-09 01:24:02,324 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:02,324 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 9 of 35 [2025-03-09 01:24:02,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:02,387 INFO L124 PetriNetUnfolderBase]: 96/186 cut-off events. [2025-03-09 01:24:02,387 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-03-09 01:24:02,388 INFO L83 FinitePrefix]: Finished finitePrefix Result has 414 conditions, 186 events. 96/186 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 629 event pairs, 68 based on Foata normal form. 0/179 useless extension candidates. Maximal degree in co-relation 380. Up to 163 conditions per place. [2025-03-09 01:24:02,388 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 27 selfloop transitions, 6 changer transitions 0/39 dead transitions. [2025-03-09 01:24:02,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 39 transitions, 228 flow [2025-03-09 01:24:02,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-09 01:24:02,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-09 01:24:02,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 59 transitions. [2025-03-09 01:24:02,389 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42142857142857143 [2025-03-09 01:24:02,389 INFO L175 Difference]: Start difference. First operand has 45 places, 41 transitions, 166 flow. Second operand 4 states and 59 transitions. [2025-03-09 01:24:02,389 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 39 transitions, 228 flow [2025-03-09 01:24:02,390 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 43 places, 39 transitions, 198 flow, removed 11 selfloop flow, removed 3 redundant places. [2025-03-09 01:24:02,391 INFO L231 Difference]: Finished difference. Result has 43 places, 39 transitions, 144 flow [2025-03-09 01:24:02,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=132, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=33, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=144, PETRI_PLACES=43, PETRI_TRANSITIONS=39} [2025-03-09 01:24:02,392 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 7 predicate places. [2025-03-09 01:24:02,392 INFO L471 AbstractCegarLoop]: Abstraction has has 43 places, 39 transitions, 144 flow [2025-03-09 01:24:02,392 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.25) internal successors, (41), 4 states have internal predecessors, (41), 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) [2025-03-09 01:24:02,392 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:02,392 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-09 01:24:02,398 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-03-09 01:24:02,592 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:02,593 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:02,593 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:02,593 INFO L85 PathProgramCache]: Analyzing trace with hash -1548915946, now seen corresponding path program 1 times [2025-03-09 01:24:02,593 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:02,593 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [348429045] [2025-03-09 01:24:02,593 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:02,594 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:02,594 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:02,595 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:02,597 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-09 01:24:02,632 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-09 01:24:02,644 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-09 01:24:02,644 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:02,644 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:02,646 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:24:02,647 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:02,688 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:02,689 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:24:02,689 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:02,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [348429045] [2025-03-09 01:24:02,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [348429045] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:02,689 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:02,689 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 01:24:02,689 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388558392] [2025-03-09 01:24:02,689 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:02,689 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:24:02,689 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:02,689 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:24:02,690 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:24:02,711 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:24:02,712 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 43 places, 39 transitions, 144 flow. Second operand has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:02,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:02,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:24:02,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:02,849 INFO L124 PetriNetUnfolderBase]: 157/310 cut-off events. [2025-03-09 01:24:02,849 INFO L125 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-03-09 01:24:02,850 INFO L83 FinitePrefix]: Finished finitePrefix Result has 651 conditions, 310 events. 157/310 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 28. Compared 1251 event pairs, 106 based on Foata normal form. 0/296 useless extension candidates. Maximal degree in co-relation 620. Up to 201 conditions per place. [2025-03-09 01:24:02,851 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 51 selfloop transitions, 5 changer transitions 0/61 dead transitions. [2025-03-09 01:24:02,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 47 places, 61 transitions, 305 flow [2025-03-09 01:24:02,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:24:02,853 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:24:02,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 103 transitions. [2025-03-09 01:24:02,854 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5885714285714285 [2025-03-09 01:24:02,854 INFO L175 Difference]: Start difference. First operand has 43 places, 39 transitions, 144 flow. Second operand 5 states and 103 transitions. [2025-03-09 01:24:02,854 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 47 places, 61 transitions, 305 flow [2025-03-09 01:24:02,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 45 places, 61 transitions, 298 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:24:02,856 INFO L231 Difference]: Finished difference. Result has 47 places, 41 transitions, 162 flow [2025-03-09 01:24:02,856 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=34, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=162, PETRI_PLACES=47, PETRI_TRANSITIONS=41} [2025-03-09 01:24:02,856 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 11 predicate places. [2025-03-09 01:24:02,856 INFO L471 AbstractCegarLoop]: Abstraction has has 47 places, 41 transitions, 162 flow [2025-03-09 01:24:02,857 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.0) internal successors, (60), 5 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:02,857 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:02,857 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:02,863 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-09 01:24:03,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:03,058 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:03,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:03,058 INFO L85 PathProgramCache]: Analyzing trace with hash -77722560, now seen corresponding path program 1 times [2025-03-09 01:24:03,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:03,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [503176173] [2025-03-09 01:24:03,058 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:03,058 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:03,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:03,062 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:03,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-09 01:24:03,105 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-09 01:24:03,113 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-09 01:24:03,114 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:03,114 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:03,115 INFO L256 TraceCheckSpWp]: Trace formula consists of 53 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-09 01:24:03,116 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:03,126 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2025-03-09 01:24:03,301 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:03,301 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:03,530 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:03,530 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:03,530 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503176173] [2025-03-09 01:24:03,530 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [503176173] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:24:03,530 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:24:03,531 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2025-03-09 01:24:03,531 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035562356] [2025-03-09 01:24:03,531 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:24:03,531 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-09 01:24:03,531 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:03,531 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-09 01:24:03,531 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-03-09 01:24:03,871 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-09 01:24:03,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 47 places, 41 transitions, 162 flow. Second operand has 12 states, 12 states have (on average 11.166666666666666) internal successors, (134), 12 states have internal predecessors, (134), 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) [2025-03-09 01:24:03,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:03,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-09 01:24:03,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:04,754 INFO L124 PetriNetUnfolderBase]: 463/872 cut-off events. [2025-03-09 01:24:04,754 INFO L125 PetriNetUnfolderBase]: For 131/152 co-relation queries the response was YES. [2025-03-09 01:24:04,756 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1932 conditions, 872 events. 463/872 cut-off events. For 131/152 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4405 event pairs, 197 based on Foata normal form. 0/830 useless extension candidates. Maximal degree in co-relation 1670. Up to 222 conditions per place. [2025-03-09 01:24:04,760 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 88 selfloop transitions, 23 changer transitions 0/115 dead transitions. [2025-03-09 01:24:04,760 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 59 places, 115 transitions, 556 flow [2025-03-09 01:24:04,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-09 01:24:04,761 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-09 01:24:04,762 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 240 transitions. [2025-03-09 01:24:04,762 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5274725274725275 [2025-03-09 01:24:04,762 INFO L175 Difference]: Start difference. First operand has 47 places, 41 transitions, 162 flow. Second operand 13 states and 240 transitions. [2025-03-09 01:24:04,762 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 59 places, 115 transitions, 556 flow [2025-03-09 01:24:04,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 115 transitions, 551 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:24:04,766 INFO L231 Difference]: Finished difference. Result has 59 places, 52 transitions, 254 flow [2025-03-09 01:24:04,766 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=157, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=254, PETRI_PLACES=59, PETRI_TRANSITIONS=52} [2025-03-09 01:24:04,767 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2025-03-09 01:24:04,767 INFO L471 AbstractCegarLoop]: Abstraction has has 59 places, 52 transitions, 254 flow [2025-03-09 01:24:04,767 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.166666666666666) internal successors, (134), 12 states have internal predecessors, (134), 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) [2025-03-09 01:24:04,767 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:04,767 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:04,775 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-09 01:24:04,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:04,968 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:04,968 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:04,968 INFO L85 PathProgramCache]: Analyzing trace with hash 1815443852, now seen corresponding path program 1 times [2025-03-09 01:24:04,969 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:04,969 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [430842953] [2025-03-09 01:24:04,969 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:04,969 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:04,969 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:04,971 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:04,972 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-09 01:24:05,006 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-09 01:24:05,014 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-09 01:24:05,014 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:05,014 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:05,016 INFO L256 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:24:05,017 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:05,060 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:05,060 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:24:05,060 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:05,060 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430842953] [2025-03-09 01:24:05,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [430842953] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:05,060 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:05,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 01:24:05,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999609023] [2025-03-09 01:24:05,060 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:05,061 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:24:05,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:05,061 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:24:05,061 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:24:05,081 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:24:05,082 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 52 transitions, 254 flow. Second operand has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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) [2025-03-09 01:24:05,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:05,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:24:05,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:05,243 INFO L124 PetriNetUnfolderBase]: 453/893 cut-off events. [2025-03-09 01:24:05,243 INFO L125 PetriNetUnfolderBase]: For 621/652 co-relation queries the response was YES. [2025-03-09 01:24:05,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2358 conditions, 893 events. 453/893 cut-off events. For 621/652 co-relation queries the response was YES. Maximal size of possible extension queue 52. Compared 4502 event pairs, 332 based on Foata normal form. 0/851 useless extension candidates. Maximal degree in co-relation 2178. Up to 733 conditions per place. [2025-03-09 01:24:05,249 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 55 selfloop transitions, 5 changer transitions 0/65 dead transitions. [2025-03-09 01:24:05,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 63 places, 65 transitions, 413 flow [2025-03-09 01:24:05,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:24:05,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:24:05,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2025-03-09 01:24:05,250 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5485714285714286 [2025-03-09 01:24:05,250 INFO L175 Difference]: Start difference. First operand has 59 places, 52 transitions, 254 flow. Second operand 5 states and 96 transitions. [2025-03-09 01:24:05,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 63 places, 65 transitions, 413 flow [2025-03-09 01:24:05,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 65 transitions, 398 flow, removed 2 selfloop flow, removed 4 redundant places. [2025-03-09 01:24:05,256 INFO L231 Difference]: Finished difference. Result has 61 places, 54 transitions, 264 flow [2025-03-09 01:24:05,256 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=239, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=264, PETRI_PLACES=61, PETRI_TRANSITIONS=54} [2025-03-09 01:24:05,256 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 25 predicate places. [2025-03-09 01:24:05,256 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 54 transitions, 264 flow [2025-03-09 01:24:05,256 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.4) internal successors, (62), 5 states have internal predecessors, (62), 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) [2025-03-09 01:24:05,257 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:05,257 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:05,263 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-03-09 01:24:05,461 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:05,461 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:05,462 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:05,462 INFO L85 PathProgramCache]: Analyzing trace with hash -1706919882, now seen corresponding path program 1 times [2025-03-09 01:24:05,462 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:05,462 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [686698795] [2025-03-09 01:24:05,462 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:05,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:05,462 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:05,466 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:05,467 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-09 01:24:05,500 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-09 01:24:05,509 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-09 01:24:05,509 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:05,509 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:05,510 INFO L256 TraceCheckSpWp]: Trace formula consists of 61 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-09 01:24:05,511 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:05,520 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 7 [2025-03-09 01:24:05,707 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:05,708 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:05,945 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:05,946 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:05,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [686698795] [2025-03-09 01:24:05,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [686698795] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:24:05,946 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:24:05,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2025-03-09 01:24:05,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264885290] [2025-03-09 01:24:05,946 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:24:05,946 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-09 01:24:05,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:05,947 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-09 01:24:05,947 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2025-03-09 01:24:06,145 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-09 01:24:06,146 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 54 transitions, 264 flow. Second operand has 12 states, 12 states have (on average 11.5) internal successors, (138), 12 states have internal predecessors, (138), 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) [2025-03-09 01:24:06,146 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:06,146 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-09 01:24:06,146 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:07,002 INFO L124 PetriNetUnfolderBase]: 585/1094 cut-off events. [2025-03-09 01:24:07,002 INFO L125 PetriNetUnfolderBase]: For 812/929 co-relation queries the response was YES. [2025-03-09 01:24:07,005 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2977 conditions, 1094 events. 585/1094 cut-off events. For 812/929 co-relation queries the response was YES. Maximal size of possible extension queue 64. Compared 5537 event pairs, 232 based on Foata normal form. 0/1052 useless extension candidates. Maximal degree in co-relation 2776. Up to 231 conditions per place. [2025-03-09 01:24:07,009 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 99 selfloop transitions, 23 changer transitions 0/126 dead transitions. [2025-03-09 01:24:07,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 126 transitions, 770 flow [2025-03-09 01:24:07,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-09 01:24:07,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-09 01:24:07,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 236 transitions. [2025-03-09 01:24:07,013 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5186813186813187 [2025-03-09 01:24:07,013 INFO L175 Difference]: Start difference. First operand has 61 places, 54 transitions, 264 flow. Second operand 13 states and 236 transitions. [2025-03-09 01:24:07,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 126 transitions, 770 flow [2025-03-09 01:24:07,017 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 126 transitions, 765 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-09 01:24:07,019 INFO L231 Difference]: Finished difference. Result has 73 places, 65 transitions, 356 flow [2025-03-09 01:24:07,019 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=259, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=38, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=356, PETRI_PLACES=73, PETRI_TRANSITIONS=65} [2025-03-09 01:24:07,020 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 37 predicate places. [2025-03-09 01:24:07,021 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 65 transitions, 356 flow [2025-03-09 01:24:07,021 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 11.5) internal successors, (138), 12 states have internal predecessors, (138), 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) [2025-03-09 01:24:07,022 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:07,022 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2025-03-09 01:24:07,033 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-09 01:24:07,222 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:07,223 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:07,223 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:07,223 INFO L85 PathProgramCache]: Analyzing trace with hash 4372845, now seen corresponding path program 2 times [2025-03-09 01:24:07,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:07,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1076177309] [2025-03-09 01:24:07,223 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:24:07,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:07,224 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:07,225 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:07,227 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-09 01:24:07,263 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 11 statements into 2 equivalence classes. [2025-03-09 01:24:07,276 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 11 of 11 statements. [2025-03-09 01:24:07,276 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:24:07,276 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:07,277 INFO L256 TraceCheckSpWp]: Trace formula consists of 65 conjuncts, 12 conjuncts are in the unsatisfiable core [2025-03-09 01:24:07,278 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:07,285 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 7 [2025-03-09 01:24:07,457 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:07,458 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:07,921 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:07,921 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:07,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1076177309] [2025-03-09 01:24:07,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1076177309] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:24:07,921 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:24:07,921 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2025-03-09 01:24:07,921 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [415128362] [2025-03-09 01:24:07,921 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:24:07,921 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-09 01:24:07,921 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:07,922 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-09 01:24:07,922 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2025-03-09 01:24:08,177 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:24:08,178 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 65 transitions, 356 flow. Second operand has 14 states, 14 states have (on average 12.571428571428571) internal successors, (176), 14 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:08,178 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:08,178 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:24:08,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:09,978 INFO L124 PetriNetUnfolderBase]: 527/1060 cut-off events. [2025-03-09 01:24:09,979 INFO L125 PetriNetUnfolderBase]: For 1135/1212 co-relation queries the response was YES. [2025-03-09 01:24:09,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3300 conditions, 1060 events. 527/1060 cut-off events. For 1135/1212 co-relation queries the response was YES. Maximal size of possible extension queue 65. Compared 5656 event pairs, 372 based on Foata normal form. 6/1065 useless extension candidates. Maximal degree in co-relation 2993. Up to 877 conditions per place. [2025-03-09 01:24:09,986 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 47 selfloop transitions, 31 changer transitions 0/83 dead transitions. [2025-03-09 01:24:09,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 83 transitions, 650 flow [2025-03-09 01:24:09,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2025-03-09 01:24:09,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 22 states. [2025-03-09 01:24:09,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 300 transitions. [2025-03-09 01:24:09,991 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.38961038961038963 [2025-03-09 01:24:09,991 INFO L175 Difference]: Start difference. First operand has 73 places, 65 transitions, 356 flow. Second operand 22 states and 300 transitions. [2025-03-09 01:24:09,991 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 83 transitions, 650 flow [2025-03-09 01:24:09,994 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 83 transitions, 618 flow, removed 2 selfloop flow, removed 5 redundant places. [2025-03-09 01:24:09,995 INFO L231 Difference]: Finished difference. Result has 95 places, 83 transitions, 554 flow [2025-03-09 01:24:09,996 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=336, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=22, PETRI_FLOW=554, PETRI_PLACES=95, PETRI_TRANSITIONS=83} [2025-03-09 01:24:09,996 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 59 predicate places. [2025-03-09 01:24:09,997 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 83 transitions, 554 flow [2025-03-09 01:24:09,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.571428571428571) internal successors, (176), 14 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:09,997 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:09,998 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:10,005 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2025-03-09 01:24:10,198 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:10,198 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:10,199 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:10,199 INFO L85 PathProgramCache]: Analyzing trace with hash -910568603, now seen corresponding path program 1 times [2025-03-09 01:24:10,199 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:10,199 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1037353446] [2025-03-09 01:24:10,199 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:10,199 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:10,199 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:10,201 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:10,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-09 01:24:10,234 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-09 01:24:10,246 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-09 01:24:10,246 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:10,246 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:10,248 INFO L256 TraceCheckSpWp]: Trace formula consists of 64 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-09 01:24:10,249 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:10,328 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:10,328 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:10,406 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:10,406 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:10,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037353446] [2025-03-09 01:24:10,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1037353446] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:24:10,406 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:24:10,406 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2025-03-09 01:24:10,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259703930] [2025-03-09 01:24:10,406 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:24:10,406 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-09 01:24:10,406 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:10,407 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-09 01:24:10,407 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2025-03-09 01:24:10,473 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:24:10,474 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 83 transitions, 554 flow. Second operand has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:10,474 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:10,474 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:24:10,474 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:10,784 INFO L124 PetriNetUnfolderBase]: 542/1025 cut-off events. [2025-03-09 01:24:10,784 INFO L125 PetriNetUnfolderBase]: For 1049/1121 co-relation queries the response was YES. [2025-03-09 01:24:10,787 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3276 conditions, 1025 events. 542/1025 cut-off events. For 1049/1121 co-relation queries the response was YES. Maximal size of possible extension queue 56. Compared 5119 event pairs, 270 based on Foata normal form. 18/1043 useless extension candidates. Maximal degree in co-relation 3211. Up to 525 conditions per place. [2025-03-09 01:24:10,790 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 83 selfloop transitions, 29 changer transitions 0/117 dead transitions. [2025-03-09 01:24:10,790 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 101 places, 117 transitions, 916 flow [2025-03-09 01:24:10,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-09 01:24:10,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-09 01:24:10,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 152 transitions. [2025-03-09 01:24:10,792 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5428571428571428 [2025-03-09 01:24:10,792 INFO L175 Difference]: Start difference. First operand has 95 places, 83 transitions, 554 flow. Second operand 8 states and 152 transitions. [2025-03-09 01:24:10,792 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 101 places, 117 transitions, 916 flow [2025-03-09 01:24:10,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 117 transitions, 836 flow, removed 27 selfloop flow, removed 9 redundant places. [2025-03-09 01:24:10,797 INFO L231 Difference]: Finished difference. Result has 93 places, 82 transitions, 538 flow [2025-03-09 01:24:10,797 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=466, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=538, PETRI_PLACES=93, PETRI_TRANSITIONS=82} [2025-03-09 01:24:10,798 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 57 predicate places. [2025-03-09 01:24:10,798 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 82 transitions, 538 flow [2025-03-09 01:24:10,799 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 12.833333333333334) internal successors, (154), 12 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:10,799 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:10,799 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:10,806 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-09 01:24:10,999 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:10,999 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:11,000 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:11,000 INFO L85 PathProgramCache]: Analyzing trace with hash 1207899739, now seen corresponding path program 1 times [2025-03-09 01:24:11,000 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:11,000 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1702345140] [2025-03-09 01:24:11,000 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:11,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:11,000 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:11,002 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:11,003 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-09 01:24:11,034 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-09 01:24:11,046 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-09 01:24:11,047 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:11,047 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:11,048 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-09 01:24:11,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:11,119 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:11,119 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:11,202 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:11,203 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:11,203 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1702345140] [2025-03-09 01:24:11,203 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1702345140] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:24:11,203 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:24:11,203 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2025-03-09 01:24:11,203 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129409187] [2025-03-09 01:24:11,203 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:24:11,203 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2025-03-09 01:24:11,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:11,203 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2025-03-09 01:24:11,204 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2025-03-09 01:24:11,276 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:24:11,276 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 82 transitions, 538 flow. Second operand has 12 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 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) [2025-03-09 01:24:11,276 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:11,276 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:24:11,276 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:11,577 INFO L124 PetriNetUnfolderBase]: 479/898 cut-off events. [2025-03-09 01:24:11,577 INFO L125 PetriNetUnfolderBase]: For 1326/1424 co-relation queries the response was YES. [2025-03-09 01:24:11,579 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3065 conditions, 898 events. 479/898 cut-off events. For 1326/1424 co-relation queries the response was YES. Maximal size of possible extension queue 44. Compared 4152 event pairs, 262 based on Foata normal form. 13/911 useless extension candidates. Maximal degree in co-relation 3001. Up to 519 conditions per place. [2025-03-09 01:24:11,582 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 75 selfloop transitions, 29 changer transitions 0/109 dead transitions. [2025-03-09 01:24:11,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 109 transitions, 880 flow [2025-03-09 01:24:11,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-09 01:24:11,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-09 01:24:11,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 150 transitions. [2025-03-09 01:24:11,583 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2025-03-09 01:24:11,583 INFO L175 Difference]: Start difference. First operand has 93 places, 82 transitions, 538 flow. Second operand 8 states and 150 transitions. [2025-03-09 01:24:11,583 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 109 transitions, 880 flow [2025-03-09 01:24:11,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 109 transitions, 843 flow, removed 9 selfloop flow, removed 3 redundant places. [2025-03-09 01:24:11,588 INFO L231 Difference]: Finished difference. Result has 97 places, 81 transitions, 585 flow [2025-03-09 01:24:11,588 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=80, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=585, PETRI_PLACES=97, PETRI_TRANSITIONS=81} [2025-03-09 01:24:11,589 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 61 predicate places. [2025-03-09 01:24:11,589 INFO L471 AbstractCegarLoop]: Abstraction has has 97 places, 81 transitions, 585 flow [2025-03-09 01:24:11,589 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.166666666666666) internal successors, (158), 12 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) [2025-03-09 01:24:11,589 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:11,589 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:11,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-09 01:24:11,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:11,790 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:11,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:11,790 INFO L85 PathProgramCache]: Analyzing trace with hash 1424100123, now seen corresponding path program 1 times [2025-03-09 01:24:11,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:11,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1589050683] [2025-03-09 01:24:11,790 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:11,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:11,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:11,792 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:11,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-09 01:24:11,823 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-09 01:24:11,829 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-09 01:24:11,829 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:11,829 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:11,830 INFO L256 TraceCheckSpWp]: Trace formula consists of 67 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-03-09 01:24:11,830 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:11,841 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:11,842 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:24:11,842 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:11,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1589050683] [2025-03-09 01:24:11,842 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1589050683] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:11,842 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:11,842 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-09 01:24:11,842 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155136864] [2025-03-09 01:24:11,842 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:11,842 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-09 01:24:11,842 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:11,842 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-09 01:24:11,842 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-09 01:24:11,842 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-03-09 01:24:11,843 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 97 places, 81 transitions, 585 flow. Second operand has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2025-03-09 01:24:11,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:11,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-03-09 01:24:11,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:11,981 INFO L124 PetriNetUnfolderBase]: 504/1029 cut-off events. [2025-03-09 01:24:11,981 INFO L125 PetriNetUnfolderBase]: For 1731/1877 co-relation queries the response was YES. [2025-03-09 01:24:11,984 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3514 conditions, 1029 events. 504/1029 cut-off events. For 1731/1877 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 5443 event pairs, 156 based on Foata normal form. 4/1032 useless extension candidates. Maximal degree in co-relation 3444. Up to 560 conditions per place. [2025-03-09 01:24:11,988 INFO L140 encePairwiseOnDemand]: 31/35 looper letters, 91 selfloop transitions, 3 changer transitions 6/106 dead transitions. [2025-03-09 01:24:11,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 106 transitions, 912 flow [2025-03-09 01:24:11,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-09 01:24:11,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-09 01:24:11,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 71 transitions. [2025-03-09 01:24:11,989 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6761904761904762 [2025-03-09 01:24:11,990 INFO L175 Difference]: Start difference. First operand has 97 places, 81 transitions, 585 flow. Second operand 3 states and 71 transitions. [2025-03-09 01:24:11,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 106 transitions, 912 flow [2025-03-09 01:24:11,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 106 transitions, 855 flow, removed 3 selfloop flow, removed 5 redundant places. [2025-03-09 01:24:11,998 INFO L231 Difference]: Finished difference. Result has 95 places, 78 transitions, 508 flow [2025-03-09 01:24:11,998 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=530, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=508, PETRI_PLACES=95, PETRI_TRANSITIONS=78} [2025-03-09 01:24:12,000 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 59 predicate places. [2025-03-09 01:24:12,000 INFO L471 AbstractCegarLoop]: Abstraction has has 95 places, 78 transitions, 508 flow [2025-03-09 01:24:12,000 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.333333333333332) internal successors, (49), 3 states have internal predecessors, (49), 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) [2025-03-09 01:24:12,000 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:12,000 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:12,009 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-03-09 01:24:12,201 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:12,201 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:12,202 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:12,202 INFO L85 PathProgramCache]: Analyzing trace with hash 1424793790, now seen corresponding path program 2 times [2025-03-09 01:24:12,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:12,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1985543904] [2025-03-09 01:24:12,202 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:24:12,202 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:12,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:12,204 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:12,204 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-09 01:24:12,237 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-09 01:24:12,243 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 6 of 14 statements. [2025-03-09 01:24:12,243 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-09 01:24:12,243 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:12,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-09 01:24:12,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:12,252 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 7 [2025-03-09 01:24:12,354 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16 trivial. 0 not checked. [2025-03-09 01:24:12,355 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:24:12,355 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:12,355 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1985543904] [2025-03-09 01:24:12,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1985543904] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:12,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:12,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-09 01:24:12,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993309405] [2025-03-09 01:24:12,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:12,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:24:12,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:12,355 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:24:12,355 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:24:12,443 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-09 01:24:12,443 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 78 transitions, 508 flow. Second operand has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 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) [2025-03-09 01:24:12,443 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:12,443 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-09 01:24:12,444 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:12,714 INFO L124 PetriNetUnfolderBase]: 756/1380 cut-off events. [2025-03-09 01:24:12,715 INFO L125 PetriNetUnfolderBase]: For 2484/2667 co-relation queries the response was YES. [2025-03-09 01:24:12,719 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4859 conditions, 1380 events. 756/1380 cut-off events. For 2484/2667 co-relation queries the response was YES. Maximal size of possible extension queue 63. Compared 7165 event pairs, 287 based on Foata normal form. 46/1423 useless extension candidates. Maximal degree in co-relation 4802. Up to 732 conditions per place. [2025-03-09 01:24:12,723 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 94 selfloop transitions, 25 changer transitions 0/123 dead transitions. [2025-03-09 01:24:12,724 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 123 transitions, 977 flow [2025-03-09 01:24:12,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:24:12,724 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:24:12,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 107 transitions. [2025-03-09 01:24:12,725 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5095238095238095 [2025-03-09 01:24:12,725 INFO L175 Difference]: Start difference. First operand has 95 places, 78 transitions, 508 flow. Second operand 6 states and 107 transitions. [2025-03-09 01:24:12,725 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 123 transitions, 977 flow [2025-03-09 01:24:12,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 123 transitions, 896 flow, removed 21 selfloop flow, removed 8 redundant places. [2025-03-09 01:24:12,733 INFO L231 Difference]: Finished difference. Result has 90 places, 86 transitions, 584 flow [2025-03-09 01:24:12,733 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=457, PETRI_DIFFERENCE_MINUEND_PLACES=83, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=584, PETRI_PLACES=90, PETRI_TRANSITIONS=86} [2025-03-09 01:24:12,734 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 54 predicate places. [2025-03-09 01:24:12,734 INFO L471 AbstractCegarLoop]: Abstraction has has 90 places, 86 transitions, 584 flow [2025-03-09 01:24:12,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 11.333333333333334) internal successors, (68), 6 states have internal predecessors, (68), 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) [2025-03-09 01:24:12,734 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:12,735 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:12,742 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-03-09 01:24:12,935 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:12,936 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:12,937 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:12,937 INFO L85 PathProgramCache]: Analyzing trace with hash 376663311, now seen corresponding path program 2 times [2025-03-09 01:24:12,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:12,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [814578214] [2025-03-09 01:24:12,938 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:24:12,938 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:12,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:12,940 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:12,943 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-09 01:24:12,977 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 14 statements into 2 equivalence classes. [2025-03-09 01:24:12,997 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 14 of 14 statements. [2025-03-09 01:24:12,997 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:24:12,997 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:13,000 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-09 01:24:13,003 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:13,014 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 7 [2025-03-09 01:24:13,261 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:13,261 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:13,622 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:13,622 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:13,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [814578214] [2025-03-09 01:24:13,623 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [814578214] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:24:13,623 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:24:13,623 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2025-03-09 01:24:13,623 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1791434764] [2025-03-09 01:24:13,623 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:24:13,623 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-03-09 01:24:13,623 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:13,623 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-03-09 01:24:13,623 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2025-03-09 01:24:14,037 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-09 01:24:14,038 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 90 places, 86 transitions, 584 flow. Second operand has 16 states, 16 states have (on average 11.5) internal successors, (184), 16 states have internal predecessors, (184), 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) [2025-03-09 01:24:14,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:14,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-09 01:24:14,038 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:15,696 INFO L124 PetriNetUnfolderBase]: 1294/2460 cut-off events. [2025-03-09 01:24:15,696 INFO L125 PetriNetUnfolderBase]: For 5118/5434 co-relation queries the response was YES. [2025-03-09 01:24:15,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8775 conditions, 2460 events. 1294/2460 cut-off events. For 5118/5434 co-relation queries the response was YES. Maximal size of possible extension queue 107. Compared 15022 event pairs, 420 based on Foata normal form. 56/2494 useless extension candidates. Maximal degree in co-relation 8720. Up to 551 conditions per place. [2025-03-09 01:24:15,709 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 178 selfloop transitions, 49 changer transitions 0/232 dead transitions. [2025-03-09 01:24:15,709 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 232 transitions, 1769 flow [2025-03-09 01:24:15,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2025-03-09 01:24:15,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 19 states. [2025-03-09 01:24:15,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 337 transitions. [2025-03-09 01:24:15,713 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5067669172932331 [2025-03-09 01:24:15,713 INFO L175 Difference]: Start difference. First operand has 90 places, 86 transitions, 584 flow. Second operand 19 states and 337 transitions. [2025-03-09 01:24:15,713 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 232 transitions, 1769 flow [2025-03-09 01:24:15,723 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 232 transitions, 1726 flow, removed 3 selfloop flow, removed 3 redundant places. [2025-03-09 01:24:15,725 INFO L231 Difference]: Finished difference. Result has 110 places, 103 transitions, 813 flow [2025-03-09 01:24:15,725 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=549, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=19, PETRI_FLOW=813, PETRI_PLACES=110, PETRI_TRANSITIONS=103} [2025-03-09 01:24:15,726 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 74 predicate places. [2025-03-09 01:24:15,726 INFO L471 AbstractCegarLoop]: Abstraction has has 110 places, 103 transitions, 813 flow [2025-03-09 01:24:15,726 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 11.5) internal successors, (184), 16 states have internal predecessors, (184), 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) [2025-03-09 01:24:15,726 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:15,726 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:15,734 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-09 01:24:15,927 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:15,927 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:15,927 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:15,927 INFO L85 PathProgramCache]: Analyzing trace with hash 1287187845, now seen corresponding path program 2 times [2025-03-09 01:24:15,928 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:15,928 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1962661331] [2025-03-09 01:24:15,928 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:24:15,928 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:15,928 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:15,929 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:15,930 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-09 01:24:15,964 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-09 01:24:15,978 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-09 01:24:15,978 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:24:15,978 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:15,980 INFO L256 TraceCheckSpWp]: Trace formula consists of 81 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-09 01:24:15,981 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:15,989 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 7 [2025-03-09 01:24:16,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:16,191 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:16,432 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:16,432 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:16,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962661331] [2025-03-09 01:24:16,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1962661331] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:24:16,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:24:16,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2025-03-09 01:24:16,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [933156755] [2025-03-09 01:24:16,433 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:24:16,433 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-09 01:24:16,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:16,433 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-09 01:24:16,433 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2025-03-09 01:24:16,754 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-09 01:24:16,754 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 103 transitions, 813 flow. Second operand has 14 states, 14 states have (on average 12.0) internal successors, (168), 14 states have internal predecessors, (168), 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) [2025-03-09 01:24:16,754 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:16,754 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-09 01:24:16,754 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:17,894 INFO L124 PetriNetUnfolderBase]: 2259/4110 cut-off events. [2025-03-09 01:24:17,894 INFO L125 PetriNetUnfolderBase]: For 13212/13473 co-relation queries the response was YES. [2025-03-09 01:24:17,904 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15882 conditions, 4110 events. 2259/4110 cut-off events. For 13212/13473 co-relation queries the response was YES. Maximal size of possible extension queue 132. Compared 24832 event pairs, 635 based on Foata normal form. 142/4216 useless extension candidates. Maximal degree in co-relation 15819. Up to 1355 conditions per place. [2025-03-09 01:24:17,917 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 197 selfloop transitions, 32 changer transitions 0/234 dead transitions. [2025-03-09 01:24:17,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 234 transitions, 2321 flow [2025-03-09 01:24:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-09 01:24:17,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-09 01:24:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 193 transitions. [2025-03-09 01:24:17,918 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5012987012987012 [2025-03-09 01:24:17,918 INFO L175 Difference]: Start difference. First operand has 110 places, 103 transitions, 813 flow. Second operand 11 states and 193 transitions. [2025-03-09 01:24:17,918 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 234 transitions, 2321 flow [2025-03-09 01:24:17,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 234 transitions, 2231 flow, removed 36 selfloop flow, removed 7 redundant places. [2025-03-09 01:24:17,943 INFO L231 Difference]: Finished difference. Result has 116 places, 113 transitions, 952 flow [2025-03-09 01:24:17,944 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=777, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=952, PETRI_PLACES=116, PETRI_TRANSITIONS=113} [2025-03-09 01:24:17,944 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 80 predicate places. [2025-03-09 01:24:17,944 INFO L471 AbstractCegarLoop]: Abstraction has has 116 places, 113 transitions, 952 flow [2025-03-09 01:24:17,945 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.0) internal successors, (168), 14 states have internal predecessors, (168), 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) [2025-03-09 01:24:17,946 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:17,946 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1] [2025-03-09 01:24:17,953 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-03-09 01:24:18,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:18,147 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:18,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:18,147 INFO L85 PathProgramCache]: Analyzing trace with hash -1501285196, now seen corresponding path program 3 times [2025-03-09 01:24:18,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:18,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1678394924] [2025-03-09 01:24:18,148 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:24:18,148 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:18,148 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:18,149 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:18,150 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-09 01:24:18,184 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 18 statements into 3 equivalence classes. [2025-03-09 01:24:18,212 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 18 of 18 statements. [2025-03-09 01:24:18,212 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-09 01:24:18,212 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:18,214 INFO L256 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-09 01:24:18,215 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:18,334 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:18,335 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:18,519 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:18,519 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1678394924] [2025-03-09 01:24:18,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1678394924] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:24:18,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:24:18,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-03-09 01:24:18,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530493824] [2025-03-09 01:24:18,520 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:24:18,520 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-09 01:24:18,520 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:18,520 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-09 01:24:18,520 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2025-03-09 01:24:18,682 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:24:18,683 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 116 places, 113 transitions, 952 flow. Second operand has 18 states, 18 states have (on average 12.88888888888889) internal successors, (232), 18 states have internal predecessors, (232), 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) [2025-03-09 01:24:18,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:18,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:24:18,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:19,599 INFO L124 PetriNetUnfolderBase]: 2246/4023 cut-off events. [2025-03-09 01:24:19,599 INFO L125 PetriNetUnfolderBase]: For 14855/15026 co-relation queries the response was YES. [2025-03-09 01:24:19,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16977 conditions, 4023 events. 2246/4023 cut-off events. For 14855/15026 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 23365 event pairs, 1224 based on Foata normal form. 84/4104 useless extension candidates. Maximal degree in co-relation 16912. Up to 2613 conditions per place. [2025-03-09 01:24:19,623 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 178 selfloop transitions, 31 changer transitions 0/214 dead transitions. [2025-03-09 01:24:19,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 128 places, 214 transitions, 1983 flow [2025-03-09 01:24:19,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-09 01:24:19,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-09 01:24:19,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 268 transitions. [2025-03-09 01:24:19,625 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5469387755102041 [2025-03-09 01:24:19,625 INFO L175 Difference]: Start difference. First operand has 116 places, 113 transitions, 952 flow. Second operand 14 states and 268 transitions. [2025-03-09 01:24:19,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 128 places, 214 transitions, 1983 flow [2025-03-09 01:24:19,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 124 places, 214 transitions, 1957 flow, removed 8 selfloop flow, removed 4 redundant places. [2025-03-09 01:24:19,666 INFO L231 Difference]: Finished difference. Result has 125 places, 110 transitions, 982 flow [2025-03-09 01:24:19,666 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=898, PETRI_DIFFERENCE_MINUEND_PLACES=111, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=982, PETRI_PLACES=125, PETRI_TRANSITIONS=110} [2025-03-09 01:24:19,666 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 89 predicate places. [2025-03-09 01:24:19,667 INFO L471 AbstractCegarLoop]: Abstraction has has 125 places, 110 transitions, 982 flow [2025-03-09 01:24:19,668 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 12.88888888888889) internal successors, (232), 18 states have internal predecessors, (232), 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) [2025-03-09 01:24:19,668 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:19,668 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:19,675 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-09 01:24:19,868 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:19,868 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:19,869 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:19,869 INFO L85 PathProgramCache]: Analyzing trace with hash 1150045226, now seen corresponding path program 3 times [2025-03-09 01:24:19,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:19,869 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1318546792] [2025-03-09 01:24:19,869 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:24:19,869 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:19,869 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:19,871 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:19,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-09 01:24:19,910 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 3 equivalence classes. [2025-03-09 01:24:19,934 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) and asserted 20 of 20 statements. [2025-03-09 01:24:19,934 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2025-03-09 01:24:19,934 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:19,937 INFO L256 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-03-09 01:24:19,938 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:20,074 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:20,074 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:20,251 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:20,251 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:20,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318546792] [2025-03-09 01:24:20,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318546792] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:24:20,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:24:20,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-03-09 01:24:20,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [804346843] [2025-03-09 01:24:20,252 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:24:20,254 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-09 01:24:20,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:20,254 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-09 01:24:20,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2025-03-09 01:24:20,437 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:24:20,437 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 125 places, 110 transitions, 982 flow. Second operand has 18 states, 18 states have (on average 13.11111111111111) internal successors, (236), 18 states have internal predecessors, (236), 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) [2025-03-09 01:24:20,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:20,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:24:20,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:21,308 INFO L124 PetriNetUnfolderBase]: 2162/3917 cut-off events. [2025-03-09 01:24:21,308 INFO L125 PetriNetUnfolderBase]: For 15045/15311 co-relation queries the response was YES. [2025-03-09 01:24:21,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16657 conditions, 3917 events. 2162/3917 cut-off events. For 15045/15311 co-relation queries the response was YES. Maximal size of possible extension queue 114. Compared 22748 event pairs, 1291 based on Foata normal form. 77/3981 useless extension candidates. Maximal degree in co-relation 16590. Up to 2708 conditions per place. [2025-03-09 01:24:21,327 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 153 selfloop transitions, 31 changer transitions 0/190 dead transitions. [2025-03-09 01:24:21,327 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 190 transitions, 1853 flow [2025-03-09 01:24:21,327 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-03-09 01:24:21,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-03-09 01:24:21,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 263 transitions. [2025-03-09 01:24:21,328 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.536734693877551 [2025-03-09 01:24:21,328 INFO L175 Difference]: Start difference. First operand has 125 places, 110 transitions, 982 flow. Second operand 14 states and 263 transitions. [2025-03-09 01:24:21,328 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 190 transitions, 1853 flow [2025-03-09 01:24:21,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 190 transitions, 1692 flow, removed 24 selfloop flow, removed 13 redundant places. [2025-03-09 01:24:21,352 INFO L231 Difference]: Finished difference. Result has 129 places, 114 transitions, 1013 flow [2025-03-09 01:24:21,352 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=891, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=110, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=27, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=79, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=1013, PETRI_PLACES=129, PETRI_TRANSITIONS=114} [2025-03-09 01:24:21,352 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 93 predicate places. [2025-03-09 01:24:21,352 INFO L471 AbstractCegarLoop]: Abstraction has has 129 places, 114 transitions, 1013 flow [2025-03-09 01:24:21,352 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 13.11111111111111) internal successors, (236), 18 states have internal predecessors, (236), 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) [2025-03-09 01:24:21,352 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:21,353 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] [2025-03-09 01:24:21,359 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2025-03-09 01:24:21,553 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:21,553 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:21,553 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:21,553 INFO L85 PathProgramCache]: Analyzing trace with hash 840476138, now seen corresponding path program 1 times [2025-03-09 01:24:21,554 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:21,554 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1057280222] [2025-03-09 01:24:21,554 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:21,554 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:21,554 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:21,555 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:21,556 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2025-03-09 01:24:21,588 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-09 01:24:21,599 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-09 01:24:21,600 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:21,600 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:21,601 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:24:21,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:21,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:24:21,631 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:24:21,631 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:21,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1057280222] [2025-03-09 01:24:21,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1057280222] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:21,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:21,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-09 01:24:21,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842477918] [2025-03-09 01:24:21,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:21,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:24:21,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:21,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:24:21,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:24:21,644 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:24:21,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 129 places, 114 transitions, 1013 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2025-03-09 01:24:21,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:21,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:24:21,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:22,073 INFO L124 PetriNetUnfolderBase]: 2154/3981 cut-off events. [2025-03-09 01:24:22,073 INFO L125 PetriNetUnfolderBase]: For 15751/15984 co-relation queries the response was YES. [2025-03-09 01:24:22,087 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17263 conditions, 3981 events. 2154/3981 cut-off events. For 15751/15984 co-relation queries the response was YES. Maximal size of possible extension queue 121. Compared 24213 event pairs, 882 based on Foata normal form. 24/3979 useless extension candidates. Maximal degree in co-relation 17192. Up to 2016 conditions per place. [2025-03-09 01:24:22,100 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 150 selfloop transitions, 15 changer transitions 13/184 dead transitions. [2025-03-09 01:24:22,100 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 134 places, 184 transitions, 1913 flow [2025-03-09 01:24:22,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:24:22,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:24:22,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2025-03-09 01:24:22,101 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2025-03-09 01:24:22,101 INFO L175 Difference]: Start difference. First operand has 129 places, 114 transitions, 1013 flow. Second operand 6 states and 117 transitions. [2025-03-09 01:24:22,101 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 134 places, 184 transitions, 1913 flow [2025-03-09 01:24:22,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 184 transitions, 1826 flow, removed 8 selfloop flow, removed 9 redundant places. [2025-03-09 01:24:22,140 INFO L231 Difference]: Finished difference. Result has 127 places, 114 transitions, 1000 flow [2025-03-09 01:24:22,140 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=952, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=15, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=99, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1000, PETRI_PLACES=127, PETRI_TRANSITIONS=114} [2025-03-09 01:24:22,140 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 91 predicate places. [2025-03-09 01:24:22,140 INFO L471 AbstractCegarLoop]: Abstraction has has 127 places, 114 transitions, 1000 flow [2025-03-09 01:24:22,141 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2025-03-09 01:24:22,141 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:22,141 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] [2025-03-09 01:24:22,147 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2025-03-09 01:24:22,341 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:22,342 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:22,343 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:22,343 INFO L85 PathProgramCache]: Analyzing trace with hash 1619195586, now seen corresponding path program 2 times [2025-03-09 01:24:22,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:22,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1222331068] [2025-03-09 01:24:22,343 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:24:22,343 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:22,343 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:22,346 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:22,347 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2025-03-09 01:24:22,383 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-09 01:24:22,399 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-09 01:24:22,399 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:24:22,399 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:22,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:24:22,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:24:22,450 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:22,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:24:22,480 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:22,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222331068] [2025-03-09 01:24:22,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222331068] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-09 01:24:22,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-09 01:24:22,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-03-09 01:24:22,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935412180] [2025-03-09 01:24:22,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:22,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:24:22,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:22,481 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:24:22,481 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-09 01:24:22,497 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-09 01:24:22,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 114 transitions, 1000 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2025-03-09 01:24:22,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:22,497 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-09 01:24:22,497 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:23,035 INFO L124 PetriNetUnfolderBase]: 2724/4824 cut-off events. [2025-03-09 01:24:23,035 INFO L125 PetriNetUnfolderBase]: For 20745/20755 co-relation queries the response was YES. [2025-03-09 01:24:23,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21469 conditions, 4824 events. 2724/4824 cut-off events. For 20745/20755 co-relation queries the response was YES. Maximal size of possible extension queue 137. Compared 28236 event pairs, 242 based on Foata normal form. 82/4906 useless extension candidates. Maximal degree in co-relation 21398. Up to 2252 conditions per place. [2025-03-09 01:24:23,061 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 169 selfloop transitions, 54 changer transitions 4/231 dead transitions. [2025-03-09 01:24:23,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 231 transitions, 2447 flow [2025-03-09 01:24:23,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-09 01:24:23,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-09 01:24:23,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 128 transitions. [2025-03-09 01:24:23,062 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5224489795918368 [2025-03-09 01:24:23,062 INFO L175 Difference]: Start difference. First operand has 127 places, 114 transitions, 1000 flow. Second operand 7 states and 128 transitions. [2025-03-09 01:24:23,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 231 transitions, 2447 flow [2025-03-09 01:24:23,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 231 transitions, 2353 flow, removed 10 selfloop flow, removed 4 redundant places. [2025-03-09 01:24:23,103 INFO L231 Difference]: Finished difference. Result has 132 places, 152 transitions, 1502 flow [2025-03-09 01:24:23,103 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=966, PETRI_DIFFERENCE_MINUEND_PLACES=122, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=90, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1502, PETRI_PLACES=132, PETRI_TRANSITIONS=152} [2025-03-09 01:24:23,103 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 96 predicate places. [2025-03-09 01:24:23,103 INFO L471 AbstractCegarLoop]: Abstraction has has 132 places, 152 transitions, 1502 flow [2025-03-09 01:24:23,104 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2025-03-09 01:24:23,104 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:23,104 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1] [2025-03-09 01:24:23,110 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2025-03-09 01:24:23,304 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:23,304 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:23,305 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:23,305 INFO L85 PathProgramCache]: Analyzing trace with hash 2127193822, now seen corresponding path program 4 times [2025-03-09 01:24:23,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:23,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [288691690] [2025-03-09 01:24:23,305 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 01:24:23,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:23,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:23,309 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:23,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2025-03-09 01:24:23,343 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-03-09 01:24:23,373 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-09 01:24:23,373 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-09 01:24:23,373 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:23,377 INFO L256 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-09 01:24:23,378 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:23,386 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 7 [2025-03-09 01:24:23,657 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:23,657 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:24,555 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:24,555 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:24,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288691690] [2025-03-09 01:24:24,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [288691690] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:24:24,555 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:24:24,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2025-03-09 01:24:24,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [897216436] [2025-03-09 01:24:24,555 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:24:24,555 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-09 01:24:24,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:24,556 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-09 01:24:24,556 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2025-03-09 01:24:25,694 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-09 01:24:25,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 132 places, 152 transitions, 1502 flow. Second operand has 21 states, 21 states have (on average 11.619047619047619) internal successors, (244), 21 states have internal predecessors, (244), 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) [2025-03-09 01:24:25,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:25,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-09 01:24:25,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:29,807 INFO L124 PetriNetUnfolderBase]: 3894/7203 cut-off events. [2025-03-09 01:24:29,807 INFO L125 PetriNetUnfolderBase]: For 46322/46810 co-relation queries the response was YES. [2025-03-09 01:24:29,834 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34980 conditions, 7203 events. 3894/7203 cut-off events. For 46322/46810 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 46714 event pairs, 877 based on Foata normal form. 147/7332 useless extension candidates. Maximal degree in co-relation 34906. Up to 1515 conditions per place. [2025-03-09 01:24:29,853 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 348 selfloop transitions, 108 changer transitions 0/469 dead transitions. [2025-03-09 01:24:29,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 469 transitions, 5208 flow [2025-03-09 01:24:29,855 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-09 01:24:29,855 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-09 01:24:29,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 483 transitions. [2025-03-09 01:24:29,856 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5307692307692308 [2025-03-09 01:24:29,856 INFO L175 Difference]: Start difference. First operand has 132 places, 152 transitions, 1502 flow. Second operand 26 states and 483 transitions. [2025-03-09 01:24:29,856 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 469 transitions, 5208 flow [2025-03-09 01:24:29,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 469 transitions, 5134 flow, removed 37 selfloop flow, removed 0 redundant places. [2025-03-09 01:24:29,959 INFO L231 Difference]: Finished difference. Result has 166 places, 197 transitions, 2392 flow [2025-03-09 01:24:29,959 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=1480, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=2392, PETRI_PLACES=166, PETRI_TRANSITIONS=197} [2025-03-09 01:24:29,959 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 130 predicate places. [2025-03-09 01:24:29,959 INFO L471 AbstractCegarLoop]: Abstraction has has 166 places, 197 transitions, 2392 flow [2025-03-09 01:24:29,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.619047619047619) internal successors, (244), 21 states have internal predecessors, (244), 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) [2025-03-09 01:24:29,959 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:29,960 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] [2025-03-09 01:24:29,967 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2025-03-09 01:24:30,160 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:30,160 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:30,160 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:30,161 INFO L85 PathProgramCache]: Analyzing trace with hash -2144344766, now seen corresponding path program 1 times [2025-03-09 01:24:30,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:30,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1253499628] [2025-03-09 01:24:30,161 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:24:30,161 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:30,161 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:30,163 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:30,164 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2025-03-09 01:24:30,197 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-09 01:24:30,210 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-09 01:24:30,210 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:24:30,210 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:30,212 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:24:30,212 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:30,253 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:24:30,253 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:30,278 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:24:30,278 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:30,278 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253499628] [2025-03-09 01:24:30,278 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253499628] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-09 01:24:30,278 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-09 01:24:30,279 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-03-09 01:24:30,279 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829337523] [2025-03-09 01:24:30,279 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:30,279 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:24:30,279 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:30,279 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:24:30,279 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2025-03-09 01:24:30,295 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-09 01:24:30,296 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 166 places, 197 transitions, 2392 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2025-03-09 01:24:30,296 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:30,296 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-09 01:24:30,296 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:31,533 INFO L124 PetriNetUnfolderBase]: 5097/8682 cut-off events. [2025-03-09 01:24:31,534 INFO L125 PetriNetUnfolderBase]: For 62165/62317 co-relation queries the response was YES. [2025-03-09 01:24:31,566 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44975 conditions, 8682 events. 5097/8682 cut-off events. For 62165/62317 co-relation queries the response was YES. Maximal size of possible extension queue 185. Compared 51840 event pairs, 563 based on Foata normal form. 139/8821 useless extension candidates. Maximal degree in co-relation 44889. Up to 4191 conditions per place. [2025-03-09 01:24:31,591 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 270 selfloop transitions, 79 changer transitions 0/354 dead transitions. [2025-03-09 01:24:31,591 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 172 places, 354 transitions, 4881 flow [2025-03-09 01:24:31,592 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-09 01:24:31,592 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-09 01:24:31,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2025-03-09 01:24:31,592 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5346938775510204 [2025-03-09 01:24:31,592 INFO L175 Difference]: Start difference. First operand has 166 places, 197 transitions, 2392 flow. Second operand 7 states and 131 transitions. [2025-03-09 01:24:31,592 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 172 places, 354 transitions, 4881 flow [2025-03-09 01:24:31,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 354 transitions, 4749 flow, removed 55 selfloop flow, removed 8 redundant places. [2025-03-09 01:24:31,784 INFO L231 Difference]: Finished difference. Result has 168 places, 240 transitions, 3088 flow [2025-03-09 01:24:31,784 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=2308, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=197, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3088, PETRI_PLACES=168, PETRI_TRANSITIONS=240} [2025-03-09 01:24:31,784 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 132 predicate places. [2025-03-09 01:24:31,784 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 240 transitions, 3088 flow [2025-03-09 01:24:31,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2025-03-09 01:24:31,785 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:31,785 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] [2025-03-09 01:24:31,791 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2025-03-09 01:24:31,985 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:31,985 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:31,985 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:31,986 INFO L85 PathProgramCache]: Analyzing trace with hash -895767944, now seen corresponding path program 3 times [2025-03-09 01:24:31,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:31,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [199801961] [2025-03-09 01:24:31,986 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:24:31,986 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:31,986 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:31,988 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:31,988 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2025-03-09 01:24:32,021 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-03-09 01:24:32,035 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-09 01:24:32,035 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-09 01:24:32,035 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:32,037 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:24:32,038 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:32,072 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:24:32,072 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:24:32,072 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:32,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [199801961] [2025-03-09 01:24:32,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [199801961] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:32,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:32,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-09 01:24:32,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93299775] [2025-03-09 01:24:32,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:32,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:24:32,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:32,073 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:24:32,073 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:24:32,090 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:24:32,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 240 transitions, 3088 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2025-03-09 01:24:32,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:32,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:24:32,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:33,105 INFO L124 PetriNetUnfolderBase]: 5055/8895 cut-off events. [2025-03-09 01:24:33,105 INFO L125 PetriNetUnfolderBase]: For 76644/76795 co-relation queries the response was YES. [2025-03-09 01:24:33,153 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48688 conditions, 8895 events. 5055/8895 cut-off events. For 76644/76795 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 55708 event pairs, 1879 based on Foata normal form. 18/8912 useless extension candidates. Maximal degree in co-relation 48599. Up to 5385 conditions per place. [2025-03-09 01:24:33,182 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 270 selfloop transitions, 77 changer transitions 13/377 dead transitions. [2025-03-09 01:24:33,182 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 173 places, 377 transitions, 5576 flow [2025-03-09 01:24:33,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:24:33,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:24:33,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2025-03-09 01:24:33,183 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2025-03-09 01:24:33,183 INFO L175 Difference]: Start difference. First operand has 168 places, 240 transitions, 3088 flow. Second operand 6 states and 117 transitions. [2025-03-09 01:24:33,183 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 173 places, 377 transitions, 5576 flow [2025-03-09 01:24:33,482 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 377 transitions, 5558 flow, removed 9 selfloop flow, removed 0 redundant places. [2025-03-09 01:24:33,486 INFO L231 Difference]: Finished difference. Result has 176 places, 285 transitions, 4096 flow [2025-03-09 01:24:33,486 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=3070, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=240, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=180, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4096, PETRI_PLACES=176, PETRI_TRANSITIONS=285} [2025-03-09 01:24:33,486 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 140 predicate places. [2025-03-09 01:24:33,486 INFO L471 AbstractCegarLoop]: Abstraction has has 176 places, 285 transitions, 4096 flow [2025-03-09 01:24:33,486 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2025-03-09 01:24:33,486 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:33,486 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] [2025-03-09 01:24:33,493 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2025-03-09 01:24:33,687 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:33,687 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:33,687 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:33,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1103095070, now seen corresponding path program 2 times [2025-03-09 01:24:33,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:33,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [594383324] [2025-03-09 01:24:33,688 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-09 01:24:33,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:33,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:33,693 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:33,694 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2025-03-09 01:24:33,735 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-09 01:24:33,746 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 18 of 20 statements. [2025-03-09 01:24:33,746 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-09 01:24:33,746 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:33,749 INFO L256 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:24:33,750 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:33,793 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:24:33,793 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:24:33,794 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:33,794 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594383324] [2025-03-09 01:24:33,794 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [594383324] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:33,794 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:33,794 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-09 01:24:33,794 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069412029] [2025-03-09 01:24:33,794 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:33,794 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:24:33,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:33,794 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:24:33,794 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:24:33,815 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:24:33,816 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 285 transitions, 4096 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2025-03-09 01:24:33,816 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:33,816 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:24:33,816 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:35,060 INFO L124 PetriNetUnfolderBase]: 4711/8443 cut-off events. [2025-03-09 01:24:35,060 INFO L125 PetriNetUnfolderBase]: For 80727/81011 co-relation queries the response was YES. [2025-03-09 01:24:35,102 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48308 conditions, 8443 events. 4711/8443 cut-off events. For 80727/81011 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 53718 event pairs, 1825 based on Foata normal form. 10/8450 useless extension candidates. Maximal degree in co-relation 48214. Up to 5219 conditions per place. [2025-03-09 01:24:35,125 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 239 selfloop transitions, 105 changer transitions 13/371 dead transitions. [2025-03-09 01:24:35,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 181 places, 371 transitions, 5872 flow [2025-03-09 01:24:35,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:24:35,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:24:35,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 117 transitions. [2025-03-09 01:24:35,126 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5571428571428572 [2025-03-09 01:24:35,126 INFO L175 Difference]: Start difference. First operand has 176 places, 285 transitions, 4096 flow. Second operand 6 states and 117 transitions. [2025-03-09 01:24:35,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 181 places, 371 transitions, 5872 flow [2025-03-09 01:24:35,341 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 371 transitions, 5795 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-09 01:24:35,345 INFO L231 Difference]: Finished difference. Result has 181 places, 309 transitions, 4800 flow [2025-03-09 01:24:35,345 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4035, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=285, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=191, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4800, PETRI_PLACES=181, PETRI_TRANSITIONS=309} [2025-03-09 01:24:35,345 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 145 predicate places. [2025-03-09 01:24:35,346 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 309 transitions, 4800 flow [2025-03-09 01:24:35,346 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2025-03-09 01:24:35,346 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:35,346 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] [2025-03-09 01:24:35,352 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2025-03-09 01:24:35,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:35,546 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:35,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:35,547 INFO L85 PathProgramCache]: Analyzing trace with hash 801146498, now seen corresponding path program 3 times [2025-03-09 01:24:35,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:35,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1206586153] [2025-03-09 01:24:35,547 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:24:35,547 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:35,547 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:35,549 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:35,550 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2025-03-09 01:24:35,584 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 20 statements into 2 equivalence classes. [2025-03-09 01:24:35,597 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-09 01:24:35,597 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-03-09 01:24:35,597 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:35,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:24:35,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:35,631 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:24:35,631 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:24:35,631 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:35,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206586153] [2025-03-09 01:24:35,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206586153] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:35,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:35,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-09 01:24:35,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647029591] [2025-03-09 01:24:35,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:35,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:24:35,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:35,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:24:35,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:24:35,644 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:24:35,644 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 309 transitions, 4800 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2025-03-09 01:24:35,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:35,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:24:35,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:36,669 INFO L124 PetriNetUnfolderBase]: 4669/8427 cut-off events. [2025-03-09 01:24:36,669 INFO L125 PetriNetUnfolderBase]: For 91345/91571 co-relation queries the response was YES. [2025-03-09 01:24:36,716 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48698 conditions, 8427 events. 4669/8427 cut-off events. For 91345/91571 co-relation queries the response was YES. Maximal size of possible extension queue 194. Compared 54081 event pairs, 1593 based on Foata normal form. 10/8433 useless extension candidates. Maximal degree in co-relation 48602. Up to 4674 conditions per place. [2025-03-09 01:24:36,745 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 336 selfloop transitions, 61 changer transitions 6/417 dead transitions. [2025-03-09 01:24:36,745 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 186 places, 417 transitions, 6943 flow [2025-03-09 01:24:36,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:24:36,745 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:24:36,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 112 transitions. [2025-03-09 01:24:36,746 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2025-03-09 01:24:36,746 INFO L175 Difference]: Start difference. First operand has 181 places, 309 transitions, 4800 flow. Second operand 6 states and 112 transitions. [2025-03-09 01:24:36,746 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 186 places, 417 transitions, 6943 flow [2025-03-09 01:24:36,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 417 transitions, 6763 flow, removed 30 selfloop flow, removed 4 redundant places. [2025-03-09 01:24:36,990 INFO L231 Difference]: Finished difference. Result has 184 places, 309 transitions, 4780 flow [2025-03-09 01:24:36,990 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4632, PETRI_DIFFERENCE_MINUEND_PLACES=177, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=248, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4780, PETRI_PLACES=184, PETRI_TRANSITIONS=309} [2025-03-09 01:24:36,990 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 148 predicate places. [2025-03-09 01:24:36,990 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 309 transitions, 4780 flow [2025-03-09 01:24:36,990 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2025-03-09 01:24:36,990 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:36,990 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] [2025-03-09 01:24:36,997 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2025-03-09 01:24:37,191 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:37,191 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:37,191 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:37,191 INFO L85 PathProgramCache]: Analyzing trace with hash 1779520076, now seen corresponding path program 4 times [2025-03-09 01:24:37,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:37,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1980250430] [2025-03-09 01:24:37,192 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 01:24:37,192 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:37,192 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:37,193 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:37,194 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2025-03-09 01:24:37,227 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-03-09 01:24:37,233 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 18 of 20 statements. [2025-03-09 01:24:37,233 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-09 01:24:37,233 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:37,234 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-09 01:24:37,234 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:37,251 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:24:37,251 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:24:37,251 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:37,251 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980250430] [2025-03-09 01:24:37,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980250430] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:37,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:37,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-09 01:24:37,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566432897] [2025-03-09 01:24:37,251 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:37,251 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:24:37,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:37,252 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:24:37,252 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:24:37,267 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:24:37,268 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 309 transitions, 4780 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 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) [2025-03-09 01:24:37,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:37,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:24:37,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:38,314 INFO L124 PetriNetUnfolderBase]: 4766/8592 cut-off events. [2025-03-09 01:24:38,315 INFO L125 PetriNetUnfolderBase]: For 98758/98846 co-relation queries the response was YES. [2025-03-09 01:24:38,363 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50468 conditions, 8592 events. 4766/8592 cut-off events. For 98758/98846 co-relation queries the response was YES. Maximal size of possible extension queue 196. Compared 55189 event pairs, 1746 based on Foata normal form. 15/8581 useless extension candidates. Maximal degree in co-relation 50372. Up to 5133 conditions per place. [2025-03-09 01:24:38,392 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 238 selfloop transitions, 102 changer transitions 8/365 dead transitions. [2025-03-09 01:24:38,392 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 365 transitions, 5965 flow [2025-03-09 01:24:38,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:24:38,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:24:38,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 107 transitions. [2025-03-09 01:24:38,393 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6114285714285714 [2025-03-09 01:24:38,393 INFO L175 Difference]: Start difference. First operand has 184 places, 309 transitions, 4780 flow. Second operand 5 states and 107 transitions. [2025-03-09 01:24:38,393 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 365 transitions, 5965 flow [2025-03-09 01:24:38,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 183 places, 365 transitions, 5846 flow, removed 1 selfloop flow, removed 4 redundant places. [2025-03-09 01:24:38,646 INFO L231 Difference]: Finished difference. Result has 184 places, 307 transitions, 4834 flow [2025-03-09 01:24:38,647 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4670, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=309, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4834, PETRI_PLACES=184, PETRI_TRANSITIONS=307} [2025-03-09 01:24:38,647 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 148 predicate places. [2025-03-09 01:24:38,647 INFO L471 AbstractCegarLoop]: Abstraction has has 184 places, 307 transitions, 4834 flow [2025-03-09 01:24:38,647 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 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) [2025-03-09 01:24:38,647 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:38,647 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] [2025-03-09 01:24:38,653 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2025-03-09 01:24:38,847 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:38,848 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:38,848 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:38,848 INFO L85 PathProgramCache]: Analyzing trace with hash -1381339094, now seen corresponding path program 4 times [2025-03-09 01:24:38,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:38,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2096497702] [2025-03-09 01:24:38,848 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 01:24:38,848 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:38,848 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:38,850 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:38,851 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2025-03-09 01:24:38,885 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 20 statements into 2 equivalence classes. [2025-03-09 01:24:38,892 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 18 of 20 statements. [2025-03-09 01:24:38,892 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-09 01:24:38,892 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:38,893 INFO L256 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-03-09 01:24:38,893 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:38,907 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:24:38,907 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:24:38,907 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:38,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096497702] [2025-03-09 01:24:38,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096497702] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:38,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:38,907 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-09 01:24:38,907 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206992852] [2025-03-09 01:24:38,907 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:38,907 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:24:38,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:38,908 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:24:38,908 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-09 01:24:38,922 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-09 01:24:38,922 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 184 places, 307 transitions, 4834 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2025-03-09 01:24:38,922 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:38,922 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-09 01:24:38,922 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:40,173 INFO L124 PetriNetUnfolderBase]: 6122/10351 cut-off events. [2025-03-09 01:24:40,173 INFO L125 PetriNetUnfolderBase]: For 117151/117232 co-relation queries the response was YES. [2025-03-09 01:24:40,227 INFO L83 FinitePrefix]: Finished finitePrefix Result has 60534 conditions, 10351 events. 6122/10351 cut-off events. For 117151/117232 co-relation queries the response was YES. Maximal size of possible extension queue 217. Compared 63435 event pairs, 1887 based on Foata normal form. 149/10500 useless extension candidates. Maximal degree in co-relation 60439. Up to 6111 conditions per place. [2025-03-09 01:24:40,258 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 310 selfloop transitions, 99 changer transitions 0/414 dead transitions. [2025-03-09 01:24:40,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 187 places, 414 transitions, 6731 flow [2025-03-09 01:24:40,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:24:40,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:24:40,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 126 transitions. [2025-03-09 01:24:40,259 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2025-03-09 01:24:40,259 INFO L175 Difference]: Start difference. First operand has 184 places, 307 transitions, 4834 flow. Second operand 6 states and 126 transitions. [2025-03-09 01:24:40,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 187 places, 414 transitions, 6731 flow [2025-03-09 01:24:40,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 414 transitions, 6605 flow, removed 8 selfloop flow, removed 3 redundant places. [2025-03-09 01:24:40,555 INFO L231 Difference]: Finished difference. Result has 186 places, 304 transitions, 4873 flow [2025-03-09 01:24:40,555 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4409, PETRI_DIFFERENCE_MINUEND_PLACES=179, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=291, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=86, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=198, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4873, PETRI_PLACES=186, PETRI_TRANSITIONS=304} [2025-03-09 01:24:40,555 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 150 predicate places. [2025-03-09 01:24:40,555 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 304 transitions, 4873 flow [2025-03-09 01:24:40,555 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2025-03-09 01:24:40,556 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:40,556 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] [2025-03-09 01:24:40,562 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2025-03-09 01:24:40,756 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:40,756 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:40,756 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:40,756 INFO L85 PathProgramCache]: Analyzing trace with hash -374344146, now seen corresponding path program 5 times [2025-03-09 01:24:40,757 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:40,757 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1061948169] [2025-03-09 01:24:40,757 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 01:24:40,757 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:40,757 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:40,758 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:40,759 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2025-03-09 01:24:40,792 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-09 01:24:40,806 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-09 01:24:40,806 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:24:40,806 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:40,808 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:24:40,809 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:40,840 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:24:40,840 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:24:40,840 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:40,840 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1061948169] [2025-03-09 01:24:40,840 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1061948169] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:40,840 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:40,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-09 01:24:40,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484790466] [2025-03-09 01:24:40,841 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:40,841 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:24:40,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:40,841 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:24:40,841 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:24:40,855 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:24:40,855 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 304 transitions, 4873 flow. Second operand has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2025-03-09 01:24:40,855 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:40,855 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:24:40,855 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:41,952 INFO L124 PetriNetUnfolderBase]: 5245/9292 cut-off events. [2025-03-09 01:24:41,952 INFO L125 PetriNetUnfolderBase]: For 108680/109324 co-relation queries the response was YES. [2025-03-09 01:24:42,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54790 conditions, 9292 events. 5245/9292 cut-off events. For 108680/109324 co-relation queries the response was YES. Maximal size of possible extension queue 219. Compared 60141 event pairs, 1934 based on Foata normal form. 10/9296 useless extension candidates. Maximal degree in co-relation 54694. Up to 5102 conditions per place. [2025-03-09 01:24:42,043 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 275 selfloop transitions, 93 changer transitions 3/387 dead transitions. [2025-03-09 01:24:42,043 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 387 transitions, 6526 flow [2025-03-09 01:24:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-03-09 01:24:42,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-03-09 01:24:42,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 115 transitions. [2025-03-09 01:24:42,044 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5476190476190477 [2025-03-09 01:24:42,044 INFO L175 Difference]: Start difference. First operand has 186 places, 304 transitions, 4873 flow. Second operand 6 states and 115 transitions. [2025-03-09 01:24:42,044 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 387 transitions, 6526 flow [2025-03-09 01:24:42,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 387 transitions, 6330 flow, removed 5 selfloop flow, removed 3 redundant places. [2025-03-09 01:24:42,358 INFO L231 Difference]: Finished difference. Result has 189 places, 306 transitions, 4923 flow [2025-03-09 01:24:42,358 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4687, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=304, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=211, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4923, PETRI_PLACES=189, PETRI_TRANSITIONS=306} [2025-03-09 01:24:42,358 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 153 predicate places. [2025-03-09 01:24:42,358 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 306 transitions, 4923 flow [2025-03-09 01:24:42,358 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.166666666666666) internal successors, (85), 6 states have internal predecessors, (85), 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) [2025-03-09 01:24:42,358 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:42,358 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] [2025-03-09 01:24:42,365 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2025-03-09 01:24:42,559 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:42,559 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:42,559 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:42,560 INFO L85 PathProgramCache]: Analyzing trace with hash -1180790462, now seen corresponding path program 6 times [2025-03-09 01:24:42,560 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:42,560 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [318707121] [2025-03-09 01:24:42,560 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-09 01:24:42,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:42,560 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:42,561 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:42,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2025-03-09 01:24:42,597 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 20 statements into 2 equivalence classes. [2025-03-09 01:24:42,610 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-09 01:24:42,610 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2025-03-09 01:24:42,610 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:42,612 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:24:42,613 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:42,654 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:24:42,654 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:42,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:24:42,682 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:42,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [318707121] [2025-03-09 01:24:42,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [318707121] provided 1 perfect and 1 imperfect interpolant sequences [2025-03-09 01:24:42,682 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-09 01:24:42,682 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 9 [2025-03-09 01:24:42,682 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598032991] [2025-03-09 01:24:42,682 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:42,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-09 01:24:42,683 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:42,683 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-09 01:24:42,683 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2025-03-09 01:24:42,699 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-09 01:24:42,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 306 transitions, 4923 flow. Second operand has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2025-03-09 01:24:42,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:42,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-09 01:24:42,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:43,883 INFO L124 PetriNetUnfolderBase]: 5883/9995 cut-off events. [2025-03-09 01:24:43,883 INFO L125 PetriNetUnfolderBase]: For 117631/117689 co-relation queries the response was YES. [2025-03-09 01:24:43,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 58529 conditions, 9995 events. 5883/9995 cut-off events. For 117631/117689 co-relation queries the response was YES. Maximal size of possible extension queue 208. Compared 60891 event pairs, 1388 based on Foata normal form. 139/10134 useless extension candidates. Maximal degree in co-relation 58431. Up to 6131 conditions per place. [2025-03-09 01:24:43,987 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 305 selfloop transitions, 83 changer transitions 3/396 dead transitions. [2025-03-09 01:24:43,987 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 396 transitions, 6754 flow [2025-03-09 01:24:43,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-09 01:24:43,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-09 01:24:43,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 96 transitions. [2025-03-09 01:24:43,988 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5485714285714286 [2025-03-09 01:24:43,988 INFO L175 Difference]: Start difference. First operand has 189 places, 306 transitions, 4923 flow. Second operand 5 states and 96 transitions. [2025-03-09 01:24:43,988 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 396 transitions, 6754 flow [2025-03-09 01:24:44,343 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 188 places, 396 transitions, 6613 flow, removed 6 selfloop flow, removed 4 redundant places. [2025-03-09 01:24:44,347 INFO L231 Difference]: Finished difference. Result has 189 places, 295 transitions, 4736 flow [2025-03-09 01:24:44,348 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4577, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=296, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=213, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=4736, PETRI_PLACES=189, PETRI_TRANSITIONS=295} [2025-03-09 01:24:44,348 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 153 predicate places. [2025-03-09 01:24:44,348 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 295 transitions, 4736 flow [2025-03-09 01:24:44,348 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.8) internal successors, (69), 5 states have internal predecessors, (69), 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) [2025-03-09 01:24:44,348 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:44,348 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] [2025-03-09 01:24:44,354 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2025-03-09 01:24:44,548 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:44,549 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:44,549 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:44,549 INFO L85 PathProgramCache]: Analyzing trace with hash 2079513918, now seen corresponding path program 5 times [2025-03-09 01:24:44,549 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:44,549 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [292389039] [2025-03-09 01:24:44,549 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 01:24:44,549 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:44,549 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:44,551 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:44,552 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2025-03-09 01:24:44,585 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-09 01:24:44,598 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-09 01:24:44,598 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-09 01:24:44,598 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:44,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-03-09 01:24:44,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-09 01:24:44,631 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-09 01:24:44,631 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:44,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [292389039] [2025-03-09 01:24:44,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [292389039] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-09 01:24:44,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-09 01:24:44,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2025-03-09 01:24:44,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1636762584] [2025-03-09 01:24:44,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-09 01:24:44,631 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-09 01:24:44,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:44,632 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-09 01:24:44,632 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2025-03-09 01:24:44,646 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-09 01:24:44,647 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 295 transitions, 4736 flow. Second operand has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:44,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:44,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-09 01:24:44,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:46,016 INFO L124 PetriNetUnfolderBase]: 6297/10558 cut-off events. [2025-03-09 01:24:46,016 INFO L125 PetriNetUnfolderBase]: For 123035/123107 co-relation queries the response was YES. [2025-03-09 01:24:46,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 63416 conditions, 10558 events. 6297/10558 cut-off events. For 123035/123107 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 63912 event pairs, 2251 based on Foata normal form. 10/10568 useless extension candidates. Maximal degree in co-relation 63319. Up to 5455 conditions per place. [2025-03-09 01:24:46,089 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 314 selfloop transitions, 86 changer transitions 0/405 dead transitions. [2025-03-09 01:24:46,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 192 places, 405 transitions, 6727 flow [2025-03-09 01:24:46,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-09 01:24:46,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-09 01:24:46,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 131 transitions. [2025-03-09 01:24:46,090 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5346938775510204 [2025-03-09 01:24:46,090 INFO L175 Difference]: Start difference. First operand has 189 places, 295 transitions, 4736 flow. Second operand 7 states and 131 transitions. [2025-03-09 01:24:46,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 192 places, 405 transitions, 6727 flow [2025-03-09 01:24:46,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 405 transitions, 6338 flow, removed 24 selfloop flow, removed 8 redundant places. [2025-03-09 01:24:46,393 INFO L231 Difference]: Finished difference. Result has 186 places, 299 transitions, 4693 flow [2025-03-09 01:24:46,393 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4262, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=287, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=205, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4693, PETRI_PLACES=186, PETRI_TRANSITIONS=299} [2025-03-09 01:24:46,393 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 150 predicate places. [2025-03-09 01:24:46,393 INFO L471 AbstractCegarLoop]: Abstraction has has 186 places, 299 transitions, 4693 flow [2025-03-09 01:24:46,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 13.166666666666666) internal successors, (79), 6 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-09 01:24:46,394 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:46,394 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:46,399 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2025-03-09 01:24:46,594 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:46,594 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:46,595 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:46,595 INFO L85 PathProgramCache]: Analyzing trace with hash 604937172, now seen corresponding path program 4 times [2025-03-09 01:24:46,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:46,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1047714114] [2025-03-09 01:24:46,595 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-09 01:24:46,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:46,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:46,597 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:46,598 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2025-03-09 01:24:46,633 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 22 statements into 2 equivalence classes. [2025-03-09 01:24:46,659 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 22 of 22 statements. [2025-03-09 01:24:46,660 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-03-09 01:24:46,660 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:46,662 INFO L256 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-09 01:24:46,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:46,670 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 7 [2025-03-09 01:24:46,977 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:46,977 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:47,811 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:47,811 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:47,811 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047714114] [2025-03-09 01:24:47,811 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1047714114] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:24:47,811 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:24:47,811 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 19 [2025-03-09 01:24:47,811 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721972499] [2025-03-09 01:24:47,811 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:24:47,812 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-03-09 01:24:47,812 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:47,812 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-03-09 01:24:47,812 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2025-03-09 01:24:48,863 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-09 01:24:48,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 186 places, 299 transitions, 4693 flow. Second operand has 21 states, 21 states have (on average 11.80952380952381) internal successors, (248), 21 states have internal predecessors, (248), 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) [2025-03-09 01:24:48,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:48,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-09 01:24:48,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:53,710 INFO L124 PetriNetUnfolderBase]: 6576/11644 cut-off events. [2025-03-09 01:24:53,710 INFO L125 PetriNetUnfolderBase]: For 131621/132971 co-relation queries the response was YES. [2025-03-09 01:24:53,774 INFO L83 FinitePrefix]: Finished finitePrefix Result has 65935 conditions, 11644 events. 6576/11644 cut-off events. For 131621/132971 co-relation queries the response was YES. Maximal size of possible extension queue 252. Compared 76060 event pairs, 963 based on Foata normal form. 260/11777 useless extension candidates. Maximal degree in co-relation 65840. Up to 2685 conditions per place. [2025-03-09 01:24:53,811 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 538 selfloop transitions, 136 changer transitions 0/705 dead transitions. [2025-03-09 01:24:53,811 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 705 transitions, 11280 flow [2025-03-09 01:24:53,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2025-03-09 01:24:53,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 26 states. [2025-03-09 01:24:53,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 467 transitions. [2025-03-09 01:24:53,813 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5131868131868131 [2025-03-09 01:24:53,813 INFO L175 Difference]: Start difference. First operand has 186 places, 299 transitions, 4693 flow. Second operand 26 states and 467 transitions. [2025-03-09 01:24:53,813 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 705 transitions, 11280 flow [2025-03-09 01:24:54,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 206 places, 705 transitions, 10980 flow, removed 21 selfloop flow, removed 5 redundant places. [2025-03-09 01:24:54,090 INFO L231 Difference]: Finished difference. Result has 214 places, 353 transitions, 5623 flow [2025-03-09 01:24:54,090 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=4495, PETRI_DIFFERENCE_MINUEND_PLACES=181, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=199, PETRI_DIFFERENCE_SUBTRAHEND_STATES=26, PETRI_FLOW=5623, PETRI_PLACES=214, PETRI_TRANSITIONS=353} [2025-03-09 01:24:54,090 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 178 predicate places. [2025-03-09 01:24:54,090 INFO L471 AbstractCegarLoop]: Abstraction has has 214 places, 353 transitions, 5623 flow [2025-03-09 01:24:54,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 11.80952380952381) internal successors, (248), 21 states have internal predecessors, (248), 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) [2025-03-09 01:24:54,091 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:54,091 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:24:54,098 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2025-03-09 01:24:54,291 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:54,291 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:54,292 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:54,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1869186377, now seen corresponding path program 5 times [2025-03-09 01:24:54,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:54,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [847260265] [2025-03-09 01:24:54,292 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-09 01:24:54,292 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:54,292 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:54,294 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:54,294 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2025-03-09 01:24:54,332 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 22 statements into 7 equivalence classes. [2025-03-09 01:24:54,397 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 22 of 22 statements. [2025-03-09 01:24:54,397 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-03-09 01:24:54,397 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:54,400 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-09 01:24:54,401 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:54,406 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 7 [2025-03-09 01:24:54,616 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-09 01:24:54,616 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:54,905 INFO L134 CoverageAnalysis]: Checked inductivity of 38 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 20 trivial. 0 not checked. [2025-03-09 01:24:54,906 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:54,906 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [847260265] [2025-03-09 01:24:54,906 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [847260265] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:24:54,906 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:24:54,906 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2025-03-09 01:24:54,906 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668827565] [2025-03-09 01:24:54,906 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:24:54,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-09 01:24:54,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:54,906 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-09 01:24:54,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2025-03-09 01:24:55,227 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-03-09 01:24:55,228 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 214 places, 353 transitions, 5623 flow. Second operand has 14 states, 14 states have (on average 11.857142857142858) internal successors, (166), 14 states have internal predecessors, (166), 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) [2025-03-09 01:24:55,228 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:24:55,228 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-03-09 01:24:55,228 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:24:57,231 INFO L124 PetriNetUnfolderBase]: 6776/11884 cut-off events. [2025-03-09 01:24:57,232 INFO L125 PetriNetUnfolderBase]: For 161682/163271 co-relation queries the response was YES. [2025-03-09 01:24:57,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72171 conditions, 11884 events. 6776/11884 cut-off events. For 161682/163271 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 77911 event pairs, 1444 based on Foata normal form. 82/11866 useless extension candidates. Maximal degree in co-relation 72066. Up to 3362 conditions per place. [2025-03-09 01:24:57,348 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 353 selfloop transitions, 136 changer transitions 0/520 dead transitions. [2025-03-09 01:24:57,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 520 transitions, 8771 flow [2025-03-09 01:24:57,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-09 01:24:57,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-09 01:24:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 195 transitions. [2025-03-09 01:24:57,349 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5064935064935064 [2025-03-09 01:24:57,349 INFO L175 Difference]: Start difference. First operand has 214 places, 353 transitions, 5623 flow. Second operand 11 states and 195 transitions. [2025-03-09 01:24:57,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 520 transitions, 8771 flow [2025-03-09 01:24:57,810 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 213 places, 520 transitions, 8528 flow, removed 93 selfloop flow, removed 11 redundant places. [2025-03-09 01:24:57,815 INFO L231 Difference]: Finished difference. Result has 215 places, 358 transitions, 5978 flow [2025-03-09 01:24:57,815 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5490, PETRI_DIFFERENCE_MINUEND_PLACES=203, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=353, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=5978, PETRI_PLACES=215, PETRI_TRANSITIONS=358} [2025-03-09 01:24:57,816 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 179 predicate places. [2025-03-09 01:24:57,816 INFO L471 AbstractCegarLoop]: Abstraction has has 215 places, 358 transitions, 5978 flow [2025-03-09 01:24:57,816 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 11.857142857142858) internal successors, (166), 14 states have internal predecessors, (166), 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) [2025-03-09 01:24:57,816 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:24:57,816 INFO L206 CegarLoopForPetriNet]: trace histogram [11, 10, 1, 1] [2025-03-09 01:24:57,824 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2025-03-09 01:24:58,016 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:58,017 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:24:58,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:24:58,017 INFO L85 PathProgramCache]: Analyzing trace with hash 254969201, now seen corresponding path program 3 times [2025-03-09 01:24:58,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:24:58,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [200331300] [2025-03-09 01:24:58,017 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-09 01:24:58,017 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:24:58,018 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:24:58,019 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:24:58,020 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2025-03-09 01:24:58,055 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 23 statements into 11 equivalence classes. [2025-03-09 01:24:58,240 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) and asserted 23 of 23 statements. [2025-03-09 01:24:58,241 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2025-03-09 01:24:58,241 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-09 01:24:58,244 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-09 01:24:58,245 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-09 01:24:58,252 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 7 [2025-03-09 01:24:58,550 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:58,550 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-09 01:24:59,967 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-09 01:24:59,967 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-03-09 01:24:59,967 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [200331300] [2025-03-09 01:24:59,967 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [200331300] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-09 01:24:59,967 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-03-09 01:24:59,967 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 24 [2025-03-09 01:24:59,967 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552982316] [2025-03-09 01:24:59,967 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-03-09 01:24:59,968 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-03-09 01:24:59,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-03-09 01:24:59,968 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-03-09 01:24:59,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=173, Invalid=477, Unknown=0, NotChecked=0, Total=650 [2025-03-09 01:25:01,056 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-03-09 01:25:01,056 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 215 places, 358 transitions, 5978 flow. Second operand has 26 states, 26 states have (on average 12.76923076923077) internal successors, (332), 26 states have internal predecessors, (332), 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) [2025-03-09 01:25:01,056 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-09 01:25:01,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-03-09 01:25:01,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-09 01:25:13,794 INFO L124 PetriNetUnfolderBase]: 6488/11722 cut-off events. [2025-03-09 01:25:13,794 INFO L125 PetriNetUnfolderBase]: For 161852/162484 co-relation queries the response was YES. [2025-03-09 01:25:13,857 INFO L83 FinitePrefix]: Finished finitePrefix Result has 72485 conditions, 11722 events. 6488/11722 cut-off events. For 161852/162484 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 78320 event pairs, 3638 based on Foata normal form. 18/11619 useless extension candidates. Maximal degree in co-relation 72103. Up to 9419 conditions per place. [2025-03-09 01:25:13,895 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 295 selfloop transitions, 66 changer transitions 0/394 dead transitions. [2025-03-09 01:25:13,895 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 260 places, 394 transitions, 7192 flow [2025-03-09 01:25:13,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2025-03-09 01:25:13,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2025-03-09 01:25:13,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 605 transitions. [2025-03-09 01:25:13,897 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.37577639751552794 [2025-03-09 01:25:13,897 INFO L175 Difference]: Start difference. First operand has 215 places, 358 transitions, 5978 flow. Second operand 46 states and 605 transitions. [2025-03-09 01:25:13,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 260 places, 394 transitions, 7192 flow [2025-03-09 01:25:14,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 256 places, 394 transitions, 7147 flow, removed 8 selfloop flow, removed 4 redundant places. [2025-03-09 01:25:14,259 INFO L231 Difference]: Finished difference. Result has 268 places, 394 transitions, 6611 flow [2025-03-09 01:25:14,260 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=5945, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=358, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=325, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=6611, PETRI_PLACES=268, PETRI_TRANSITIONS=394} [2025-03-09 01:25:14,260 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 232 predicate places. [2025-03-09 01:25:14,260 INFO L471 AbstractCegarLoop]: Abstraction has has 268 places, 394 transitions, 6611 flow [2025-03-09 01:25:14,260 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 12.76923076923077) internal successors, (332), 26 states have internal predecessors, (332), 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) [2025-03-09 01:25:14,260 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-09 01:25:14,260 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] [2025-03-09 01:25:14,268 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2025-03-09 01:25:14,460 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:25:14,461 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2025-03-09 01:25:14,461 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-09 01:25:14,461 INFO L85 PathProgramCache]: Analyzing trace with hash -1049329049, now seen corresponding path program 1 times [2025-03-09 01:25:14,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-03-09 01:25:14,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [23185342] [2025-03-09 01:25:14,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-09 01:25:14,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:25:14,461 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-09 01:25:14,463 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2025-03-09 01:25:14,464 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2025-03-09 01:25:14,500 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-09 01:25:14,518 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-09 01:25:14,518 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:25:14,518 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-09 01:25:14,518 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-03-09 01:25:14,528 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 24 statements into 1 equivalence classes. [2025-03-09 01:25:14,539 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 24 of 24 statements. [2025-03-09 01:25:14,539 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-09 01:25:14,539 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-03-09 01:25:14,573 INFO L130 FreeRefinementEngine]: Strategy FOX found a feasible trace [2025-03-09 01:25:14,573 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-03-09 01:25:14,574 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK (13 of 14 remaining) [2025-03-09 01:25:14,575 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 14 remaining) [2025-03-09 01:25:14,575 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 14 remaining) [2025-03-09 01:25:14,575 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 14 remaining) [2025-03-09 01:25:14,575 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 14 remaining) [2025-03-09 01:25:14,575 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 14 remaining) [2025-03-09 01:25:14,575 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 14 remaining) [2025-03-09 01:25:14,575 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (6 of 14 remaining) [2025-03-09 01:25:14,575 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (5 of 14 remaining) [2025-03-09 01:25:14,575 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (4 of 14 remaining) [2025-03-09 01:25:14,575 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 14 remaining) [2025-03-09 01:25:14,575 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 14 remaining) [2025-03-09 01:25:14,575 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 14 remaining) [2025-03-09 01:25:14,575 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 14 remaining) [2025-03-09 01:25:14,582 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2025-03-09 01:25:14,776 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-09 01:25:14,776 INFO L422 BasicCegarLoop]: Path program histogram: [6, 5, 5, 4, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-09 01:25:14,804 INFO L241 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-03-09 01:25:14,804 INFO L170 ceAbstractionStarter]: Computing trace abstraction results [2025-03-09 01:25:14,807 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.03 01:25:14 BasicIcfg [2025-03-09 01:25:14,809 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-03-09 01:25:14,809 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-03-09 01:25:14,809 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-03-09 01:25:14,809 INFO L274 PluginConnector]: Witness Printer initialized [2025-03-09 01:25:14,810 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 09.03 01:23:59" (3/4) ... [2025-03-09 01:25:14,811 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-03-09 01:25:14,811 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-03-09 01:25:14,812 INFO L158 Benchmark]: Toolchain (without parser) took 75676.08ms. Allocated memory was 83.9MB in the beginning and 1.7GB in the end (delta: 1.7GB). Free memory was 58.6MB in the beginning and 763.1MB in the end (delta: -704.5MB). Peak memory consumption was 951.5MB. Max. memory is 16.1GB. [2025-03-09 01:25:14,812 INFO L158 Benchmark]: CDTParser took 0.24ms. Allocated memory is still 83.9MB. Free memory is still 46.6MB. There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 01:25:14,812 INFO L158 Benchmark]: CACSL2BoogieTranslator took 180.18ms. Allocated memory is still 83.9MB. Free memory was 58.4MB in the beginning and 46.1MB in the end (delta: 12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-09 01:25:14,812 INFO L158 Benchmark]: Boogie Procedure Inliner took 40.94ms. Allocated memory is still 83.9MB. Free memory was 46.1MB in the beginning and 44.6MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-09 01:25:14,812 INFO L158 Benchmark]: Boogie Preprocessor took 51.79ms. Allocated memory is still 83.9MB. Free memory was 44.6MB in the beginning and 42.7MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. [2025-03-09 01:25:14,812 INFO L158 Benchmark]: IcfgBuilder took 583.92ms. Allocated memory is still 83.9MB. Free memory was 42.5MB in the beginning and 44.9MB in the end (delta: -2.4MB). Peak memory consumption was 21.3MB. Max. memory is 16.1GB. [2025-03-09 01:25:14,812 INFO L158 Benchmark]: TraceAbstraction took 74812.00ms. Allocated memory was 83.9MB in the beginning and 1.7GB in the end (delta: 1.7GB). Free memory was 44.4MB in the beginning and 763.4MB in the end (delta: -718.9MB). Peak memory consumption was 931.0MB. Max. memory is 16.1GB. [2025-03-09 01:25:14,813 INFO L158 Benchmark]: Witness Printer took 2.26ms. Allocated memory is still 1.7GB. Free memory was 763.4MB in the beginning and 763.1MB in the end (delta: 273.4kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-03-09 01:25:14,813 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24ms. Allocated memory is still 83.9MB. Free memory is still 46.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 180.18ms. Allocated memory is still 83.9MB. Free memory was 58.4MB in the beginning and 46.1MB in the end (delta: 12.3MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 40.94ms. Allocated memory is still 83.9MB. Free memory was 46.1MB in the beginning and 44.6MB in the end (delta: 1.5MB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 51.79ms. Allocated memory is still 83.9MB. Free memory was 44.6MB in the beginning and 42.7MB in the end (delta: 1.9MB). There was no memory consumed. Max. memory is 16.1GB. * IcfgBuilder took 583.92ms. Allocated memory is still 83.9MB. Free memory was 42.5MB in the beginning and 44.9MB in the end (delta: -2.4MB). Peak memory consumption was 21.3MB. Max. memory is 16.1GB. * TraceAbstraction took 74812.00ms. Allocated memory was 83.9MB in the beginning and 1.7GB in the end (delta: 1.7GB). Free memory was 44.4MB in the beginning and 763.4MB in the end (delta: -718.9MB). Peak memory consumption was 931.0MB. Max. memory is 16.1GB. * Witness Printer took 2.26ms. Allocated memory is still 1.7GB. Free memory was 763.4MB in the beginning and 763.1MB in the end (delta: 273.4kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 21]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 21. Possible FailurePath: [L39] 0 int* A; [L40] 0 _Atomic int counter; [L41] 0 int N; [L66] 0 pthread_t t1, t2; [L68] 0 N = __VERIFIER_nondet_int() [L69] CALL, EXPR 0 create_fresh_int_array(N) [L84] CALL 0 assume_abort_if_not(size >= 0) [L36] COND FALSE 0 !(!cond) [L84] RET 0 assume_abort_if_not(size >= 0) [L85] CALL 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L36] COND FALSE 0 !(!cond) [L85] RET 0 assume_abort_if_not(size <= (((size_t) 4294967295) / sizeof(int))) [L87] 0 int* arr = (int*)malloc(sizeof(int) * (size_t)size); [L88] 0 int i = 0; VAL [A={0:0}, N=1, \old(size)=1, arr={2048:0}, counter=0, i=0, size=1] [L88] COND TRUE 0 i < size [L89] 0 arr[i] = __VERIFIER_nondet_int() [L88] 0 i++ VAL [A={0:0}, N=1, \old(size)=1, arr={2048:0}, counter=0, i=1, size=1] [L88] COND FALSE 0 !(i < size) [L91] 0 return arr; [L69] RET, EXPR 0 create_fresh_int_array(N) [L69] 0 A = create_fresh_int_array(N) [L72] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [A={2048:0}, N=1, counter=0, t1=-1] [L48] 1 int i=0; VAL [A={2048:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=0, i=0] [L48] COND TRUE 1 i= 0 || a >= -2147483648 - b) [L36] COND FALSE 1 !(!cond) [L101] RET 1 assume_abort_if_not(b >= 0 || a >= -2147483648 - b) [L102] CALL 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L36] COND FALSE 1 !(!cond) [L102] RET 1 assume_abort_if_not(b <= 0 || a <= 2147483647 - b) [L103] 1 return a + b; [L49] RET, EXPR 1 plus(counter, A[i]) [L49] 1 int tmp = plus(counter, A[i]); [L73] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [A={2048:0}, N=1, counter=0, t1=-1, t2=0] [L57] 2 int i=0; VAL [A={2048:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=0, i=0] [L57] COND TRUE 2 i= b - 2147483648) [L36] COND FALSE 2 !(!cond) [L95] RET 2 assume_abort_if_not(b <= 0 || a >= b - 2147483648) [L96] CALL 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L36] COND FALSE 2 !(!cond) [L96] RET 2 assume_abort_if_not(b >= 0 || a <= b + 2147483647) [L97] 2 return a - b; [L58] RET, EXPR 2 minus(counter, A[i]) [L58] 2 int tmp = minus(counter, A[i]); [L50] 1 counter = tmp VAL [A={2048:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=1, i=0, tmp=1] [L48] 1 i++ VAL [A={2048:0}, N=1, \old(_argptr)={0:0}, _argptr={0:0}, counter=1, i=1] [L48] COND FALSE 1 !(i