./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/chl-node-symm.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 798a7b37 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/chl-node-symm.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 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 --- Real Ultimate output --- This is Ultimate 0.3.0-?-798a7b3-m [2025-03-04 10:07:17,044 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-03-04 10:07:17,099 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-03-04 10:07:17,103 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-03-04 10:07:17,103 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-03-04 10:07:17,123 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-03-04 10:07:17,123 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-03-04 10:07:17,123 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-03-04 10:07:17,124 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-03-04 10:07:17,124 INFO L153 SettingsManager]: * Use memory slicer=true [2025-03-04 10:07:17,124 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-03-04 10:07:17,124 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-03-04 10:07:17,124 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-03-04 10:07:17,124 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-03-04 10:07:17,124 INFO L153 SettingsManager]: * Use SBE=true [2025-03-04 10:07:17,124 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-03-04 10:07:17,124 INFO L153 SettingsManager]: * sizeof long=4 [2025-03-04 10:07:17,124 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-03-04 10:07:17,124 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-03-04 10:07:17,124 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-03-04 10:07:17,124 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-03-04 10:07:17,125 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-03-04 10:07:17,125 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-03-04 10:07:17,125 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-03-04 10:07:17,125 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-03-04 10:07:17,125 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-03-04 10:07:17,125 INFO L153 SettingsManager]: * sizeof long double=12 [2025-03-04 10:07:17,125 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-03-04 10:07:17,125 INFO L153 SettingsManager]: * Use constant arrays=true [2025-03-04 10:07:17,125 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-03-04 10:07:17,125 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-03-04 10:07:17,125 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-03-04 10:07:17,125 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-03-04 10:07:17,125 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:07:17,125 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-03-04 10:07:17,125 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-03-04 10:07:17,125 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-03-04 10:07:17,125 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-03-04 10:07:17,125 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2025-03-04 10:07:17,125 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-03-04 10:07:17,126 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-03-04 10:07:17,126 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-03-04 10:07:17,126 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 -> 9db11e263e78e3a6bd75c2a0c3dda64920ec857df2fbb1d0b7b1072a48f36a31 [2025-03-04 10:07:17,335 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-03-04 10:07:17,341 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-03-04 10:07:17,344 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-03-04 10:07:17,345 INFO L270 PluginConnector]: Initializing CDTParser... [2025-03-04 10:07:17,345 INFO L274 PluginConnector]: CDTParser initialized [2025-03-04 10:07:17,346 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2025-03-04 10:07:18,521 INFO L533 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f6093642/5dc8e09695104d8db78a79c422ef0bdc/FLAGd54d3e8f9 [2025-03-04 10:07:18,796 INFO L384 CDTParser]: Found 1 translation units. [2025-03-04 10:07:18,798 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/chl-node-symm.wvr.c [2025-03-04 10:07:18,806 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f6093642/5dc8e09695104d8db78a79c422ef0bdc/FLAGd54d3e8f9 [2025-03-04 10:07:19,102 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/3f6093642/5dc8e09695104d8db78a79c422ef0bdc [2025-03-04 10:07:19,103 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-03-04 10:07:19,104 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-03-04 10:07:19,105 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-03-04 10:07:19,105 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-03-04 10:07:19,109 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-03-04 10:07:19,110 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:07:19" (1/1) ... [2025-03-04 10:07:19,111 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@164ad910 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:07:19, skipping insertion in model container [2025-03-04 10:07:19,112 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 04.03 10:07:19" (1/1) ... [2025-03-04 10:07:19,125 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-03-04 10:07:19,257 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 10:07:19,261 WARN L1100 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2025-03-04 10:07:19,268 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:07:19,281 INFO L200 MainTranslator]: Completed pre-run [2025-03-04 10:07:19,311 INFO L210 PostProcessor]: Analyzing one entry point: main [2025-03-04 10:07:19,325 INFO L204 MainTranslator]: Completed translation [2025-03-04 10:07:19,325 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:07:19 WrapperNode [2025-03-04 10:07:19,325 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-03-04 10:07:19,326 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-03-04 10:07:19,326 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-03-04 10:07:19,326 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-03-04 10:07:19,331 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:07:19" (1/1) ... [2025-03-04 10:07:19,337 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:07:19" (1/1) ... [2025-03-04 10:07:19,364 INFO L138 Inliner]: procedures = 25, calls = 41, calls flagged for inlining = 19, calls inlined = 25, statements flattened = 279 [2025-03-04 10:07:19,364 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-03-04 10:07:19,365 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-03-04 10:07:19,365 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-03-04 10:07:19,365 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-03-04 10:07:19,372 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:07:19" (1/1) ... [2025-03-04 10:07:19,372 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:07:19" (1/1) ... [2025-03-04 10:07:19,375 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:07:19" (1/1) ... [2025-03-04 10:07:19,397 INFO L175 MemorySlicer]: Split 18 memory accesses to 3 slices as follows [2, 10, 6]. 56 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 4 writes are split as follows [0, 2, 2]. [2025-03-04 10:07:19,398 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:07:19" (1/1) ... [2025-03-04 10:07:19,398 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:07:19" (1/1) ... [2025-03-04 10:07:19,405 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:07:19" (1/1) ... [2025-03-04 10:07:19,405 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:07:19" (1/1) ... [2025-03-04 10:07:19,406 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:07:19" (1/1) ... [2025-03-04 10:07:19,407 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:07:19" (1/1) ... [2025-03-04 10:07:19,409 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-03-04 10:07:19,409 INFO L112 PluginConnector]: ------------------------IcfgBuilder---------------------------- [2025-03-04 10:07:19,409 INFO L270 PluginConnector]: Initializing IcfgBuilder... [2025-03-04 10:07:19,410 INFO L274 PluginConnector]: IcfgBuilder initialized [2025-03-04 10:07:19,410 INFO L184 PluginConnector]: Executing the observer IcfgBuilderObserver from plugin IcfgBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:07:19" (1/1) ... [2025-03-04 10:07:19,415 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-03-04 10:07:19,423 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:07:19,433 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) [2025-03-04 10:07:19,435 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 [2025-03-04 10:07:19,451 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-03-04 10:07:19,451 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-03-04 10:07:19,451 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-03-04 10:07:19,451 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-03-04 10:07:19,451 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-03-04 10:07:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-03-04 10:07:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-03-04 10:07:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2025-03-04 10:07:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2025-03-04 10:07:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2025-03-04 10:07:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2025-03-04 10:07:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-03-04 10:07:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-03-04 10:07:19,452 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-03-04 10:07:19,452 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-03-04 10:07:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-03-04 10:07:19,453 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2025-03-04 10:07:19,454 WARN L225 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-03-04 10:07:19,536 INFO L256 CfgBuilder]: Building ICFG [2025-03-04 10:07:19,538 INFO L286 CfgBuilder]: Building CFG for each procedure with an implementation [2025-03-04 10:07:19,913 INFO L303 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-03-04 10:07:19,913 INFO L307 CfgBuilder]: Performing block encoding [2025-03-04 10:07:20,204 INFO L331 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-03-04 10:07:20,205 INFO L336 CfgBuilder]: Removed 0 assume(true) statements. [2025-03-04 10:07:20,205 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 10:07:20 BoogieIcfgContainer [2025-03-04 10:07:20,205 INFO L131 PluginConnector]: ------------------------ END IcfgBuilder---------------------------- [2025-03-04 10:07:20,207 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-03-04 10:07:20,207 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-03-04 10:07:20,210 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-03-04 10:07:20,211 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 04.03 10:07:19" (1/3) ... [2025-03-04 10:07:20,213 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35ab8627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 10:07:20, skipping insertion in model container [2025-03-04 10:07:20,213 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 04.03 10:07:19" (2/3) ... [2025-03-04 10:07:20,214 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@35ab8627 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 04.03 10:07:20, skipping insertion in model container [2025-03-04 10:07:20,214 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.icfgbuilder CFG 04.03 10:07:20" (3/3) ... [2025-03-04 10:07:20,215 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-node-symm.wvr.c [2025-03-04 10:07:20,226 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-03-04 10:07:20,228 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-node-symm.wvr.c that has 3 procedures, 75 locations, 1 initial locations, 4 loop locations, and 34 error locations. [2025-03-04 10:07:20,228 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-03-04 10:07:20,287 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-03-04 10:07:20,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 81 places, 82 transitions, 178 flow [2025-03-04 10:07:20,340 INFO L124 PetriNetUnfolderBase]: 8/80 cut-off events. [2025-03-04 10:07:20,341 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-04 10:07:20,344 INFO L83 FinitePrefix]: Finished finitePrefix Result has 89 conditions, 80 events. 8/80 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 224 event pairs, 0 based on Foata normal form. 0/38 useless extension candidates. Maximal degree in co-relation 53. Up to 2 conditions per place. [2025-03-04 10:07:20,344 INFO L82 GeneralOperation]: Start removeDead. Operand has 81 places, 82 transitions, 178 flow [2025-03-04 10:07:20,346 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 78 places, 79 transitions, 170 flow [2025-03-04 10:07:20,351 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-03-04 10:07:20,361 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;@403efbee, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-03-04 10:07:20,361 INFO L334 AbstractCegarLoop]: Starting to check reachability of 60 error locations. [2025-03-04 10:07:20,365 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-03-04 10:07:20,365 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2025-03-04 10:07:20,365 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2025-03-04 10:07:20,365 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:20,366 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-04 10:07:20,366 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:20,369 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:20,370 INFO L85 PathProgramCache]: Analyzing trace with hash 835918, now seen corresponding path program 1 times [2025-03-04 10:07:20,375 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:20,376 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [285061420] [2025-03-04 10:07:20,376 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:20,377 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:20,426 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-04 10:07:20,448 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-04 10:07:20,448 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:20,448 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:20,586 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:07:20,587 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:20,587 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [285061420] [2025-03-04 10:07:20,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [285061420] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:07:20,587 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:07:20,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2025-03-04 10:07:20,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728471960] [2025-03-04 10:07:20,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:07:20,594 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:07:20,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:20,613 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:07:20,613 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:07:20,662 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-04 10:07:20,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 79 transitions, 170 flow. Second operand has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:20,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:20,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-04 10:07:20,665 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:20,853 INFO L124 PetriNetUnfolderBase]: 192/580 cut-off events. [2025-03-04 10:07:20,854 INFO L125 PetriNetUnfolderBase]: For 16/16 co-relation queries the response was YES. [2025-03-04 10:07:20,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 912 conditions, 580 events. 192/580 cut-off events. For 16/16 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3514 event pairs, 113 based on Foata normal form. 1/426 useless extension candidates. Maximal degree in co-relation 827. Up to 301 conditions per place. [2025-03-04 10:07:20,861 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 32 selfloop transitions, 2 changer transitions 0/75 dead transitions. [2025-03-04 10:07:20,862 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 75 transitions, 230 flow [2025-03-04 10:07:20,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:07:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:07:20,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 169 transitions. [2025-03-04 10:07:20,872 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6869918699186992 [2025-03-04 10:07:20,873 INFO L175 Difference]: Start difference. First operand has 78 places, 79 transitions, 170 flow. Second operand 3 states and 169 transitions. [2025-03-04 10:07:20,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 75 transitions, 230 flow [2025-03-04 10:07:20,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 75 transitions, 222 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-03-04 10:07:20,881 INFO L231 Difference]: Finished difference. Result has 72 places, 75 transitions, 158 flow [2025-03-04 10:07:20,882 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=158, PETRI_PLACES=72, PETRI_TRANSITIONS=75} [2025-03-04 10:07:20,885 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -6 predicate places. [2025-03-04 10:07:20,886 INFO L471 AbstractCegarLoop]: Abstraction has has 72 places, 75 transitions, 158 flow [2025-03-04 10:07:20,887 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.0) internal successors, (135), 3 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:20,887 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:20,887 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2025-03-04 10:07:20,887 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-03-04 10:07:20,888 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:20,889 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:20,889 INFO L85 PathProgramCache]: Analyzing trace with hash 835919, now seen corresponding path program 1 times [2025-03-04 10:07:20,889 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:20,889 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90773227] [2025-03-04 10:07:20,889 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:20,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:20,898 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 3 statements into 1 equivalence classes. [2025-03-04 10:07:20,923 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 3 of 3 statements. [2025-03-04 10:07:20,923 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:20,923 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:21,126 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:07:21,126 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:21,126 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90773227] [2025-03-04 10:07:21,126 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90773227] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:07:21,126 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:07:21,126 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:07:21,126 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [732600365] [2025-03-04 10:07:21,126 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:07:21,127 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:07:21,127 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:21,127 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:07:21,127 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:07:21,192 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-04 10:07:21,193 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 75 transitions, 158 flow. Second operand has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:21,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:21,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-04 10:07:21,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:21,290 INFO L124 PetriNetUnfolderBase]: 192/582 cut-off events. [2025-03-04 10:07:21,290 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-04 10:07:21,295 INFO L83 FinitePrefix]: Finished finitePrefix Result has 904 conditions, 582 events. 192/582 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3506 event pairs, 113 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 877. Up to 309 conditions per place. [2025-03-04 10:07:21,297 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 36 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2025-03-04 10:07:21,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 77 transitions, 238 flow [2025-03-04 10:07:21,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:07:21,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:07:21,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 172 transitions. [2025-03-04 10:07:21,299 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6991869918699187 [2025-03-04 10:07:21,299 INFO L175 Difference]: Start difference. First operand has 72 places, 75 transitions, 158 flow. Second operand 3 states and 172 transitions. [2025-03-04 10:07:21,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 77 transitions, 238 flow [2025-03-04 10:07:21,299 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 72 places, 77 transitions, 234 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:07:21,300 INFO L231 Difference]: Finished difference. Result has 73 places, 76 transitions, 168 flow [2025-03-04 10:07:21,300 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=73, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=168, PETRI_PLACES=73, PETRI_TRANSITIONS=76} [2025-03-04 10:07:21,301 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -5 predicate places. [2025-03-04 10:07:21,301 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 76 transitions, 168 flow [2025-03-04 10:07:21,301 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 44.75) internal successors, (179), 4 states have internal predecessors, (179), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:21,301 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:21,301 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2025-03-04 10:07:21,301 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-03-04 10:07:21,301 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:21,302 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:21,302 INFO L85 PathProgramCache]: Analyzing trace with hash 803343955, now seen corresponding path program 1 times [2025-03-04 10:07:21,302 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:21,302 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530609411] [2025-03-04 10:07:21,302 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:21,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:21,310 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-04 10:07:21,322 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-04 10:07:21,322 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:21,322 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:21,551 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:07:21,551 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:21,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530609411] [2025-03-04 10:07:21,552 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530609411] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:07:21,552 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1769224210] [2025-03-04 10:07:21,552 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:21,552 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:21,552 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:07:21,556 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) [2025-03-04 10:07:21,558 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-03-04 10:07:21,608 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 5 statements into 1 equivalence classes. [2025-03-04 10:07:21,622 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 5 of 5 statements. [2025-03-04 10:07:21,622 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:21,623 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:21,625 INFO L256 TraceCheckSpWp]: Trace formula consists of 90 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-03-04 10:07:21,630 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:07:21,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-03-04 10:07:21,822 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:07:21,822 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:07:21,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-03-04 10:07:21,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1769224210] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:07:21,892 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:07:21,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2025-03-04 10:07:21,892 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002555498] [2025-03-04 10:07:21,892 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:07:21,892 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-03-04 10:07:21,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:21,893 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-03-04 10:07:21,893 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=73, Unknown=0, NotChecked=0, Total=110 [2025-03-04 10:07:22,201 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-04 10:07:22,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 76 transitions, 168 flow. Second operand has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:22,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:22,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-04 10:07:22,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:22,503 INFO L124 PetriNetUnfolderBase]: 192/581 cut-off events. [2025-03-04 10:07:22,503 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-03-04 10:07:22,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 906 conditions, 581 events. 192/581 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3506 event pairs, 113 based on Foata normal form. 0/426 useless extension candidates. Maximal degree in co-relation 893. Up to 305 conditions per place. [2025-03-04 10:07:22,508 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 32 selfloop transitions, 5 changer transitions 0/76 dead transitions. [2025-03-04 10:07:22,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 76 transitions, 240 flow [2025-03-04 10:07:22,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 10:07:22,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 10:07:22,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 258 transitions. [2025-03-04 10:07:22,512 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6292682926829268 [2025-03-04 10:07:22,512 INFO L175 Difference]: Start difference. First operand has 73 places, 76 transitions, 168 flow. Second operand 5 states and 258 transitions. [2025-03-04 10:07:22,512 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 76 transitions, 240 flow [2025-03-04 10:07:22,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 76 transitions, 238 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-03-04 10:07:22,514 INFO L231 Difference]: Finished difference. Result has 76 places, 76 transitions, 180 flow [2025-03-04 10:07:22,514 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=70, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=180, PETRI_PLACES=76, PETRI_TRANSITIONS=76} [2025-03-04 10:07:22,517 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -2 predicate places. [2025-03-04 10:07:22,517 INFO L471 AbstractCegarLoop]: Abstraction has has 76 places, 76 transitions, 180 flow [2025-03-04 10:07:22,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 45.36363636363637) internal successors, (499), 11 states have internal predecessors, (499), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:22,518 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:22,518 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2025-03-04 10:07:22,526 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2025-03-04 10:07:22,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:22,722 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:22,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:22,723 INFO L85 PathProgramCache]: Analyzing trace with hash -866138386, now seen corresponding path program 1 times [2025-03-04 10:07:22,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:22,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466655750] [2025-03-04 10:07:22,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:22,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:22,730 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 6 statements into 1 equivalence classes. [2025-03-04 10:07:22,742 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 6 of 6 statements. [2025-03-04 10:07:22,744 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:22,744 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:22,915 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:07:22,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:22,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466655750] [2025-03-04 10:07:22,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466655750] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:07:22,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:07:22,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:07:22,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038620702] [2025-03-04 10:07:22,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:07:22,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 10:07:22,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:22,917 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 10:07:22,917 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-04 10:07:22,991 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-04 10:07:22,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 76 transitions, 180 flow. Second operand has 5 states, 5 states have (on average 45.2) internal successors, (226), 5 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:22,992 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:22,992 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-04 10:07:22,992 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:23,133 INFO L124 PetriNetUnfolderBase]: 192/583 cut-off events. [2025-03-04 10:07:23,134 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-04 10:07:23,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 918 conditions, 583 events. 192/583 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3515 event pairs, 113 based on Foata normal form. 0/428 useless extension candidates. Maximal degree in co-relation 889. Up to 307 conditions per place. [2025-03-04 10:07:23,137 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 35 selfloop transitions, 4 changer transitions 0/78 dead transitions. [2025-03-04 10:07:23,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 79 places, 78 transitions, 262 flow [2025-03-04 10:07:23,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:07:23,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:07:23,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 217 transitions. [2025-03-04 10:07:23,139 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6615853658536586 [2025-03-04 10:07:23,139 INFO L175 Difference]: Start difference. First operand has 76 places, 76 transitions, 180 flow. Second operand 4 states and 217 transitions. [2025-03-04 10:07:23,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 79 places, 78 transitions, 262 flow [2025-03-04 10:07:23,139 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 76 places, 78 transitions, 252 flow, removed 2 selfloop flow, removed 3 redundant places. [2025-03-04 10:07:23,141 INFO L231 Difference]: Finished difference. Result has 77 places, 77 transitions, 190 flow [2025-03-04 10:07:23,142 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=170, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=190, PETRI_PLACES=77, PETRI_TRANSITIONS=77} [2025-03-04 10:07:23,143 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, -1 predicate places. [2025-03-04 10:07:23,143 INFO L471 AbstractCegarLoop]: Abstraction has has 77 places, 77 transitions, 190 flow [2025-03-04 10:07:23,143 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.2) internal successors, (226), 5 states have internal predecessors, (226), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:23,143 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:23,144 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:23,144 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-03-04 10:07:23,144 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:23,144 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:23,145 INFO L85 PathProgramCache]: Analyzing trace with hash 864693412, now seen corresponding path program 1 times [2025-03-04 10:07:23,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:23,145 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75327131] [2025-03-04 10:07:23,145 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:23,145 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:23,152 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-04 10:07:23,165 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-04 10:07:23,166 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:23,166 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:23,334 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:07:23,334 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:23,334 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75327131] [2025-03-04 10:07:23,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75327131] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:07:23,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1134877616] [2025-03-04 10:07:23,335 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:23,335 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:23,335 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:07:23,337 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) [2025-03-04 10:07:23,351 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-03-04 10:07:23,392 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 8 statements into 1 equivalence classes. [2025-03-04 10:07:23,409 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 8 of 8 statements. [2025-03-04 10:07:23,410 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:23,410 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:23,410 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-03-04 10:07:23,412 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:07:23,430 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2025-03-04 10:07:23,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:07:23,561 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:07:23,705 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:07:23,705 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1134877616] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:07:23,705 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:07:23,705 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2025-03-04 10:07:23,705 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1321100978] [2025-03-04 10:07:23,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:07:23,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2025-03-04 10:07:23,706 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:23,706 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2025-03-04 10:07:23,706 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2025-03-04 10:07:24,159 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-04 10:07:24,160 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 77 places, 77 transitions, 190 flow. Second operand has 13 states, 13 states have (on average 45.61538461538461) internal successors, (593), 13 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:24,161 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:24,161 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-04 10:07:24,161 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:24,495 INFO L124 PetriNetUnfolderBase]: 194/588 cut-off events. [2025-03-04 10:07:24,495 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2025-03-04 10:07:24,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 938 conditions, 588 events. 194/588 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3518 event pairs, 113 based on Foata normal form. 0/435 useless extension candidates. Maximal degree in co-relation 899. Up to 301 conditions per place. [2025-03-04 10:07:24,499 INFO L140 encePairwiseOnDemand]: 74/82 looper letters, 28 selfloop transitions, 16 changer transitions 0/83 dead transitions. [2025-03-04 10:07:24,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 303 flow [2025-03-04 10:07:24,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-03-04 10:07:24,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-03-04 10:07:24,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 442 transitions. [2025-03-04 10:07:24,500 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5989159891598916 [2025-03-04 10:07:24,501 INFO L175 Difference]: Start difference. First operand has 77 places, 77 transitions, 190 flow. Second operand 9 states and 442 transitions. [2025-03-04 10:07:24,501 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 303 flow [2025-03-04 10:07:24,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 298 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:07:24,503 INFO L231 Difference]: Finished difference. Result has 82 places, 83 transitions, 242 flow [2025-03-04 10:07:24,503 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=76, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=242, PETRI_PLACES=82, PETRI_TRANSITIONS=83} [2025-03-04 10:07:24,504 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 4 predicate places. [2025-03-04 10:07:24,504 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 83 transitions, 242 flow [2025-03-04 10:07:24,504 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 45.61538461538461) internal successors, (593), 13 states have internal predecessors, (593), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:24,504 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:24,505 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:24,511 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-03-04 10:07:24,705 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:24,705 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:24,706 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:24,706 INFO L85 PathProgramCache]: Analyzing trace with hash 1035691572, now seen corresponding path program 1 times [2025-03-04 10:07:24,706 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:24,706 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473738463] [2025-03-04 10:07:24,706 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:24,706 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:24,713 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 10:07:24,717 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 10:07:24,718 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:24,718 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:24,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-04 10:07:24,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:24,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473738463] [2025-03-04 10:07:24,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473738463] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:07:24,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:07:24,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-03-04 10:07:24,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1638183569] [2025-03-04 10:07:24,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:07:24,764 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:07:24,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:24,765 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:07:24,765 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:07:24,789 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-04 10:07:24,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 83 transitions, 242 flow. Second operand has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:24,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:24,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-04 10:07:24,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:24,884 INFO L124 PetriNetUnfolderBase]: 194/586 cut-off events. [2025-03-04 10:07:24,884 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-03-04 10:07:24,885 INFO L83 FinitePrefix]: Finished finitePrefix Result has 950 conditions, 586 events. 194/586 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3517 event pairs, 113 based on Foata normal form. 0/435 useless extension candidates. Maximal degree in co-relation 904. Up to 310 conditions per place. [2025-03-04 10:07:24,888 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 41 selfloop transitions, 3 changer transitions 0/81 dead transitions. [2025-03-04 10:07:24,888 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 81 transitions, 326 flow [2025-03-04 10:07:24,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:07:24,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:07:24,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2025-03-04 10:07:24,889 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2025-03-04 10:07:24,889 INFO L175 Difference]: Start difference. First operand has 82 places, 83 transitions, 242 flow. Second operand 3 states and 168 transitions. [2025-03-04 10:07:24,889 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 81 transitions, 326 flow [2025-03-04 10:07:24,890 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 81 transitions, 307 flow, removed 4 selfloop flow, removed 3 redundant places. [2025-03-04 10:07:24,891 INFO L231 Difference]: Finished difference. Result has 79 places, 81 transitions, 225 flow [2025-03-04 10:07:24,891 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=225, PETRI_PLACES=79, PETRI_TRANSITIONS=81} [2025-03-04 10:07:24,892 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 1 predicate places. [2025-03-04 10:07:24,892 INFO L471 AbstractCegarLoop]: Abstraction has has 79 places, 81 transitions, 225 flow [2025-03-04 10:07:24,892 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 47.0) internal successors, (141), 3 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:24,892 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:24,892 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:24,892 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2025-03-04 10:07:24,892 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:24,893 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:24,893 INFO L85 PathProgramCache]: Analyzing trace with hash 1035691573, now seen corresponding path program 1 times [2025-03-04 10:07:24,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:24,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356004607] [2025-03-04 10:07:24,893 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:24,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:24,899 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 10:07:24,906 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 10:07:24,906 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:24,906 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:25,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:07:25,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:25,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356004607] [2025-03-04 10:07:25,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [356004607] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:07:25,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800553123] [2025-03-04 10:07:25,036 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:25,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:25,036 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:07:25,038 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) [2025-03-04 10:07:25,039 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-03-04 10:07:25,079 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 9 statements into 1 equivalence classes. [2025-03-04 10:07:25,093 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 9 of 9 statements. [2025-03-04 10:07:25,093 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:25,093 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:25,094 INFO L256 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-03-04 10:07:25,095 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:07:25,133 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 [2025-03-04 10:07:25,137 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-04 10:07:25,137 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:07:25,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [800553123] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:07:25,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-04 10:07:25,138 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [5] total 6 [2025-03-04 10:07:25,138 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953079661] [2025-03-04 10:07:25,138 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:07:25,138 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:07:25,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:25,138 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:07:25,138 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2025-03-04 10:07:25,177 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-04 10:07:25,177 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 81 transitions, 225 flow. Second operand has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:25,177 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:25,177 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-04 10:07:25,178 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:25,267 INFO L124 PetriNetUnfolderBase]: 195/589 cut-off events. [2025-03-04 10:07:25,268 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2025-03-04 10:07:25,269 INFO L83 FinitePrefix]: Finished finitePrefix Result has 951 conditions, 589 events. 195/589 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3523 event pairs, 113 based on Foata normal form. 0/434 useless extension candidates. Maximal degree in co-relation 910. Up to 318 conditions per place. [2025-03-04 10:07:25,271 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 44 selfloop transitions, 5 changer transitions 0/84 dead transitions. [2025-03-04 10:07:25,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 84 transitions, 329 flow [2025-03-04 10:07:25,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:07:25,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:07:25,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 216 transitions. [2025-03-04 10:07:25,272 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2025-03-04 10:07:25,272 INFO L175 Difference]: Start difference. First operand has 79 places, 81 transitions, 225 flow. Second operand 4 states and 216 transitions. [2025-03-04 10:07:25,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 84 transitions, 329 flow [2025-03-04 10:07:25,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 80 places, 84 transitions, 323 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:07:25,274 INFO L231 Difference]: Finished difference. Result has 81 places, 83 transitions, 243 flow [2025-03-04 10:07:25,274 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=219, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=243, PETRI_PLACES=81, PETRI_TRANSITIONS=83} [2025-03-04 10:07:25,274 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 3 predicate places. [2025-03-04 10:07:25,274 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 83 transitions, 243 flow [2025-03-04 10:07:25,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.25) internal successors, (185), 4 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:25,275 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:25,275 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:25,281 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-03-04 10:07:25,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:25,479 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:25,479 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:25,480 INFO L85 PathProgramCache]: Analyzing trace with hash 2041670440, now seen corresponding path program 1 times [2025-03-04 10:07:25,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:25,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063268656] [2025-03-04 10:07:25,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:25,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:25,487 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-03-04 10:07:25,496 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-03-04 10:07:25,496 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:25,496 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:25,542 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-04 10:07:25,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:25,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063268656] [2025-03-04 10:07:25,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063268656] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:07:25,542 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:07:25,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:07:25,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1901703856] [2025-03-04 10:07:25,543 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:07:25,543 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:07:25,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:25,543 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:07:25,543 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:07:25,556 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:07:25,556 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 83 transitions, 243 flow. Second operand has 4 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:25,556 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:25,556 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:07:25,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:25,661 INFO L124 PetriNetUnfolderBase]: 194/588 cut-off events. [2025-03-04 10:07:25,662 INFO L125 PetriNetUnfolderBase]: For 5/5 co-relation queries the response was YES. [2025-03-04 10:07:25,663 INFO L83 FinitePrefix]: Finished finitePrefix Result has 953 conditions, 588 events. 194/588 cut-off events. For 5/5 co-relation queries the response was YES. Maximal size of possible extension queue 46. Compared 3504 event pairs, 113 based on Foata normal form. 1/437 useless extension candidates. Maximal degree in co-relation 910. Up to 315 conditions per place. [2025-03-04 10:07:25,665 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 42 selfloop transitions, 4 changer transitions 0/83 dead transitions. [2025-03-04 10:07:25,665 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 84 places, 83 transitions, 332 flow [2025-03-04 10:07:25,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:07:25,665 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:07:25,666 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 221 transitions. [2025-03-04 10:07:25,666 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6737804878048781 [2025-03-04 10:07:25,666 INFO L175 Difference]: Start difference. First operand has 81 places, 83 transitions, 243 flow. Second operand 4 states and 221 transitions. [2025-03-04 10:07:25,666 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 84 places, 83 transitions, 332 flow [2025-03-04 10:07:25,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 83 transitions, 327 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:07:25,668 INFO L231 Difference]: Finished difference. Result has 82 places, 82 transitions, 241 flow [2025-03-04 10:07:25,668 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=241, PETRI_PLACES=82, PETRI_TRANSITIONS=82} [2025-03-04 10:07:25,668 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 4 predicate places. [2025-03-04 10:07:25,668 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 82 transitions, 241 flow [2025-03-04 10:07:25,669 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 48.25) internal successors, (193), 4 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:25,669 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:25,669 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:25,669 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-03-04 10:07:25,669 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:25,669 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:25,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1132785650, now seen corresponding path program 1 times [2025-03-04 10:07:25,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:25,669 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734610530] [2025-03-04 10:07:25,669 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:25,669 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:25,674 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 10:07:25,679 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 10:07:25,679 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:25,679 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:25,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:07:25,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:25,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734610530] [2025-03-04 10:07:25,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [734610530] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:07:25,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939957147] [2025-03-04 10:07:25,754 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:25,754 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:25,754 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:07:25,756 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) [2025-03-04 10:07:25,757 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-03-04 10:07:25,798 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-03-04 10:07:25,812 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-03-04 10:07:25,812 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:25,812 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:25,813 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-04 10:07:25,814 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:07:25,865 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:07:25,865 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:07:25,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2025-03-04 10:07:25,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1939957147] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:07:25,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:07:25,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-04 10:07:25,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812959679] [2025-03-04 10:07:25,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:07:25,919 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-04 10:07:25,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:25,919 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-04 10:07:25,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-03-04 10:07:26,073 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:07:26,074 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 82 transitions, 241 flow. Second operand has 14 states, 14 states have (on average 47.785714285714285) internal successors, (669), 14 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:26,074 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:26,074 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:07:26,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:26,317 INFO L124 PetriNetUnfolderBase]: 377/1135 cut-off events. [2025-03-04 10:07:26,318 INFO L125 PetriNetUnfolderBase]: For 11/11 co-relation queries the response was YES. [2025-03-04 10:07:26,319 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1822 conditions, 1135 events. 377/1135 cut-off events. For 11/11 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8177 event pairs, 225 based on Foata normal form. 1/851 useless extension candidates. Maximal degree in co-relation 905. Up to 301 conditions per place. [2025-03-04 10:07:26,323 INFO L140 encePairwiseOnDemand]: 72/82 looper letters, 58 selfloop transitions, 22 changer transitions 0/117 dead transitions. [2025-03-04 10:07:26,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 117 transitions, 505 flow [2025-03-04 10:07:26,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:07:26,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:07:26,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 530 transitions. [2025-03-04 10:07:26,327 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2025-03-04 10:07:26,327 INFO L175 Difference]: Start difference. First operand has 82 places, 82 transitions, 241 flow. Second operand 10 states and 530 transitions. [2025-03-04 10:07:26,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 117 transitions, 505 flow [2025-03-04 10:07:26,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 117 transitions, 491 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:07:26,329 INFO L231 Difference]: Finished difference. Result has 91 places, 92 transitions, 345 flow [2025-03-04 10:07:26,329 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=233, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=82, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=345, PETRI_PLACES=91, PETRI_TRANSITIONS=92} [2025-03-04 10:07:26,332 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 13 predicate places. [2025-03-04 10:07:26,332 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 92 transitions, 345 flow [2025-03-04 10:07:26,333 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 47.785714285714285) internal successors, (669), 14 states have internal predecessors, (669), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:26,333 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:26,333 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:26,339 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-03-04 10:07:26,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:26,534 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:26,534 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:26,534 INFO L85 PathProgramCache]: Analyzing trace with hash -756614033, now seen corresponding path program 1 times [2025-03-04 10:07:26,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:26,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578464365] [2025-03-04 10:07:26,535 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:26,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:26,544 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-03-04 10:07:26,557 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-03-04 10:07:26,560 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:26,560 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:26,686 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 10:07:26,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:26,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578464365] [2025-03-04 10:07:26,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578464365] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:07:26,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:07:26,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:07:26,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079761260] [2025-03-04 10:07:26,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:07:26,687 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 10:07:26,687 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:26,688 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 10:07:26,688 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-04 10:07:26,772 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-04 10:07:26,772 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 92 transitions, 345 flow. Second operand has 5 states, 5 states have (on average 46.4) internal successors, (232), 5 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) [2025-03-04 10:07:26,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:26,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-04 10:07:26,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:26,911 INFO L124 PetriNetUnfolderBase]: 384/1168 cut-off events. [2025-03-04 10:07:26,911 INFO L125 PetriNetUnfolderBase]: For 13/13 co-relation queries the response was YES. [2025-03-04 10:07:26,913 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1903 conditions, 1168 events. 384/1168 cut-off events. For 13/13 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8429 event pairs, 226 based on Foata normal form. 0/865 useless extension candidates. Maximal degree in co-relation 927. Up to 628 conditions per place. [2025-03-04 10:07:26,917 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 55 selfloop transitions, 4 changer transitions 0/94 dead transitions. [2025-03-04 10:07:26,917 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 94 transitions, 467 flow [2025-03-04 10:07:26,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:07:26,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:07:26,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 216 transitions. [2025-03-04 10:07:26,918 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6585365853658537 [2025-03-04 10:07:26,919 INFO L175 Difference]: Start difference. First operand has 91 places, 92 transitions, 345 flow. Second operand 4 states and 216 transitions. [2025-03-04 10:07:26,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 94 transitions, 467 flow [2025-03-04 10:07:26,920 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 94 transitions, 463 flow, removed 1 selfloop flow, removed 1 redundant places. [2025-03-04 10:07:26,921 INFO L231 Difference]: Finished difference. Result has 94 places, 93 transitions, 360 flow [2025-03-04 10:07:26,921 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=341, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=360, PETRI_PLACES=94, PETRI_TRANSITIONS=93} [2025-03-04 10:07:26,921 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 16 predicate places. [2025-03-04 10:07:26,921 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 93 transitions, 360 flow [2025-03-04 10:07:26,922 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.4) internal successors, (232), 5 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) [2025-03-04 10:07:26,922 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:26,922 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:26,922 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2025-03-04 10:07:26,922 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:26,922 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:26,922 INFO L85 PathProgramCache]: Analyzing trace with hash 767891730, now seen corresponding path program 2 times [2025-03-04 10:07:26,922 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:26,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653891668] [2025-03-04 10:07:26,923 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:07:26,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:26,930 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-04 10:07:26,939 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-03-04 10:07:26,939 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 10:07:26,939 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:27,070 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:07:27,070 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:27,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653891668] [2025-03-04 10:07:27,070 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1653891668] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:07:27,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1424949122] [2025-03-04 10:07:27,070 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:07:27,070 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:27,071 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:07:27,073 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) [2025-03-04 10:07:27,074 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-03-04 10:07:27,119 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 13 statements into 2 equivalence classes. [2025-03-04 10:07:27,138 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 13 of 13 statements. [2025-03-04 10:07:27,138 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 10:07:27,138 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:27,139 INFO L256 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-03-04 10:07:27,141 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:07:27,166 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 [2025-03-04 10:07:27,232 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 1 proven. 4 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-04 10:07:27,232 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:07:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:07:27,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1424949122] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:07:27,323 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:07:27,323 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 12 [2025-03-04 10:07:27,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [607558138] [2025-03-04 10:07:27,324 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:07:27,324 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-04 10:07:27,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:27,324 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-04 10:07:27,324 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-03-04 10:07:27,674 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-04 10:07:27,674 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 93 transitions, 360 flow. Second operand has 14 states, 14 states have (on average 46.142857142857146) internal successors, (646), 14 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:27,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:27,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-04 10:07:27,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:27,893 INFO L124 PetriNetUnfolderBase]: 384/1167 cut-off events. [2025-03-04 10:07:27,893 INFO L125 PetriNetUnfolderBase]: For 15/15 co-relation queries the response was YES. [2025-03-04 10:07:27,895 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1913 conditions, 1167 events. 384/1167 cut-off events. For 15/15 co-relation queries the response was YES. Maximal size of possible extension queue 85. Compared 8414 event pairs, 226 based on Foata normal form. 0/867 useless extension candidates. Maximal degree in co-relation 930. Up to 615 conditions per place. [2025-03-04 10:07:27,899 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 41 selfloop transitions, 17 changer transitions 0/93 dead transitions. [2025-03-04 10:07:27,899 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 93 transitions, 476 flow [2025-03-04 10:07:27,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-04 10:07:27,900 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-04 10:07:27,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 394 transitions. [2025-03-04 10:07:27,901 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2025-03-04 10:07:27,901 INFO L175 Difference]: Start difference. First operand has 94 places, 93 transitions, 360 flow. Second operand 8 states and 394 transitions. [2025-03-04 10:07:27,901 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 93 transitions, 476 flow [2025-03-04 10:07:27,902 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 93 transitions, 471 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:07:27,903 INFO L231 Difference]: Finished difference. Result has 98 places, 93 transitions, 389 flow [2025-03-04 10:07:27,903 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=351, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=76, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=389, PETRI_PLACES=98, PETRI_TRANSITIONS=93} [2025-03-04 10:07:27,904 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 20 predicate places. [2025-03-04 10:07:27,904 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 93 transitions, 389 flow [2025-03-04 10:07:27,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.142857142857146) internal successors, (646), 14 states have internal predecessors, (646), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:27,904 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:27,904 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:27,911 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-03-04 10:07:28,105 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 [2025-03-04 10:07:28,105 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:28,105 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:28,105 INFO L85 PathProgramCache]: Analyzing trace with hash -1256585574, now seen corresponding path program 1 times [2025-03-04 10:07:28,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:28,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1241487662] [2025-03-04 10:07:28,105 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:28,106 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:28,111 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-04 10:07:28,116 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 10:07:28,117 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:28,117 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:28,261 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-04 10:07:28,261 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:28,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1241487662] [2025-03-04 10:07:28,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1241487662] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:07:28,261 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2015933022] [2025-03-04 10:07:28,262 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:28,262 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:28,262 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:07:28,264 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) [2025-03-04 10:07:28,265 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-03-04 10:07:28,312 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 14 statements into 1 equivalence classes. [2025-03-04 10:07:28,331 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 14 of 14 statements. [2025-03-04 10:07:28,331 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:28,331 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:28,332 INFO L256 TraceCheckSpWp]: Trace formula consists of 203 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-04 10:07:28,333 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:07:28,380 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-04 10:07:28,380 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:07:28,426 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2025-03-04 10:07:28,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2015933022] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:07:28,426 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:07:28,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-04 10:07:28,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [665647753] [2025-03-04 10:07:28,426 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:07:28,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-04 10:07:28,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:28,427 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-04 10:07:28,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-03-04 10:07:28,554 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:07:28,555 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 93 transitions, 389 flow. Second operand has 14 states, 14 states have (on average 48.0) internal successors, (672), 14 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:28,555 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:28,555 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:07:28,556 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:28,803 INFO L124 PetriNetUnfolderBase]: 745/2245 cut-off events. [2025-03-04 10:07:28,803 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2025-03-04 10:07:28,807 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3627 conditions, 2245 events. 745/2245 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19059 event pairs, 450 based on Foata normal form. 2/1685 useless extension candidates. Maximal degree in co-relation 1790. Up to 596 conditions per place. [2025-03-04 10:07:28,813 INFO L140 encePairwiseOnDemand]: 71/82 looper letters, 66 selfloop transitions, 22 changer transitions 0/124 dead transitions. [2025-03-04 10:07:28,814 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 124 transitions, 676 flow [2025-03-04 10:07:28,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-04 10:07:28,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-04 10:07:28,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 436 transitions. [2025-03-04 10:07:28,815 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6646341463414634 [2025-03-04 10:07:28,816 INFO L175 Difference]: Start difference. First operand has 98 places, 93 transitions, 389 flow. Second operand 8 states and 436 transitions. [2025-03-04 10:07:28,816 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 124 transitions, 676 flow [2025-03-04 10:07:28,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 124 transitions, 600 flow, removed 6 selfloop flow, removed 7 redundant places. [2025-03-04 10:07:28,818 INFO L231 Difference]: Finished difference. Result has 101 places, 97 transitions, 422 flow [2025-03-04 10:07:28,818 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=337, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=422, PETRI_PLACES=101, PETRI_TRANSITIONS=97} [2025-03-04 10:07:28,821 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 23 predicate places. [2025-03-04 10:07:28,822 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 97 transitions, 422 flow [2025-03-04 10:07:28,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 48.0) internal successors, (672), 14 states have internal predecessors, (672), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:28,822 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:28,822 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:28,830 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-03-04 10:07:29,023 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 [2025-03-04 10:07:29,023 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:29,024 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:29,024 INFO L85 PathProgramCache]: Analyzing trace with hash -1162455472, now seen corresponding path program 2 times [2025-03-04 10:07:29,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:29,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2146481524] [2025-03-04 10:07:29,024 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:07:29,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:29,033 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-04 10:07:29,050 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 10:07:29,050 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 10:07:29,050 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:29,196 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-04 10:07:29,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:29,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2146481524] [2025-03-04 10:07:29,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2146481524] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:07:29,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602547016] [2025-03-04 10:07:29,197 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:07:29,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:29,197 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:07:29,199 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) [2025-03-04 10:07:29,201 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-03-04 10:07:29,247 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 16 statements into 2 equivalence classes. [2025-03-04 10:07:29,279 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 10:07:29,279 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 10:07:29,279 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:29,281 INFO L256 TraceCheckSpWp]: Trace formula consists of 216 conjuncts, 22 conjuncts are in the unsatisfiable core [2025-03-04 10:07:29,282 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:07:29,317 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 [2025-03-04 10:07:29,375 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 10:07:29,376 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:07:29,490 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-04 10:07:29,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1602547016] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:07:29,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:07:29,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 4] total 12 [2025-03-04 10:07:29,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1827904971] [2025-03-04 10:07:29,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:07:29,492 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-04 10:07:29,492 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:29,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-04 10:07:29,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2025-03-04 10:07:29,829 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-04 10:07:29,830 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 97 transitions, 422 flow. Second operand has 14 states, 14 states have (on average 46.57142857142857) internal successors, (652), 14 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:29,830 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:29,830 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-04 10:07:29,830 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:30,057 INFO L124 PetriNetUnfolderBase]: 759/2301 cut-off events. [2025-03-04 10:07:30,057 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2025-03-04 10:07:30,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3701 conditions, 2301 events. 759/2301 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 156. Compared 19520 event pairs, 452 based on Foata normal form. 0/1705 useless extension candidates. Maximal degree in co-relation 1820. Up to 1207 conditions per place. [2025-03-04 10:07:30,073 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 45 selfloop transitions, 17 changer transitions 0/97 dead transitions. [2025-03-04 10:07:30,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 97 transitions, 546 flow [2025-03-04 10:07:30,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-03-04 10:07:30,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-03-04 10:07:30,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 393 transitions. [2025-03-04 10:07:30,075 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5990853658536586 [2025-03-04 10:07:30,075 INFO L175 Difference]: Start difference. First operand has 101 places, 97 transitions, 422 flow. Second operand 8 states and 393 transitions. [2025-03-04 10:07:30,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 97 transitions, 546 flow [2025-03-04 10:07:30,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 105 places, 97 transitions, 520 flow, removed 1 selfloop flow, removed 2 redundant places. [2025-03-04 10:07:30,079 INFO L231 Difference]: Finished difference. Result has 105 places, 97 transitions, 430 flow [2025-03-04 10:07:30,079 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=392, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=96, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=430, PETRI_PLACES=105, PETRI_TRANSITIONS=97} [2025-03-04 10:07:30,080 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 27 predicate places. [2025-03-04 10:07:30,080 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 97 transitions, 430 flow [2025-03-04 10:07:30,080 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 46.57142857142857) internal successors, (652), 14 states have internal predecessors, (652), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:30,081 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:30,081 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:30,087 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-03-04 10:07:30,281 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 [2025-03-04 10:07:30,281 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:30,282 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:30,282 INFO L85 PathProgramCache]: Analyzing trace with hash -692811241, now seen corresponding path program 1 times [2025-03-04 10:07:30,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:30,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [986000331] [2025-03-04 10:07:30,282 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:30,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:30,289 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-04 10:07:30,301 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 10:07:30,301 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:30,301 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:30,453 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2025-03-04 10:07:30,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:30,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [986000331] [2025-03-04 10:07:30,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [986000331] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:07:30,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:07:30,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2025-03-04 10:07:30,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566585631] [2025-03-04 10:07:30,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:07:30,454 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 10:07:30,454 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:30,455 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 10:07:30,455 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-04 10:07:30,527 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 82 [2025-03-04 10:07:30,527 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 97 transitions, 430 flow. Second operand has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:30,527 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:30,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 82 [2025-03-04 10:07:30,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:30,687 INFO L124 PetriNetUnfolderBase]: 847/2321 cut-off events. [2025-03-04 10:07:30,687 INFO L125 PetriNetUnfolderBase]: For 46/46 co-relation queries the response was YES. [2025-03-04 10:07:30,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3881 conditions, 2321 events. 847/2321 cut-off events. For 46/46 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 18991 event pairs, 524 based on Foata normal form. 0/1881 useless extension candidates. Maximal degree in co-relation 1911. Up to 1352 conditions per place. [2025-03-04 10:07:30,700 INFO L140 encePairwiseOnDemand]: 75/82 looper letters, 56 selfloop transitions, 7 changer transitions 0/93 dead transitions. [2025-03-04 10:07:30,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 93 transitions, 548 flow [2025-03-04 10:07:30,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 10:07:30,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 10:07:30,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 234 transitions. [2025-03-04 10:07:30,702 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5707317073170731 [2025-03-04 10:07:30,703 INFO L175 Difference]: Start difference. First operand has 105 places, 97 transitions, 430 flow. Second operand 5 states and 234 transitions. [2025-03-04 10:07:30,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 93 transitions, 548 flow [2025-03-04 10:07:30,704 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 93 transitions, 496 flow, removed 3 selfloop flow, removed 7 redundant places. [2025-03-04 10:07:30,705 INFO L231 Difference]: Finished difference. Result has 98 places, 93 transitions, 384 flow [2025-03-04 10:07:30,705 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=370, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=384, PETRI_PLACES=98, PETRI_TRANSITIONS=93} [2025-03-04 10:07:30,706 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 20 predicate places. [2025-03-04 10:07:30,706 INFO L471 AbstractCegarLoop]: Abstraction has has 98 places, 93 transitions, 384 flow [2025-03-04 10:07:30,706 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 42.0) internal successors, (210), 5 states have internal predecessors, (210), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:30,706 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:30,706 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:30,706 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2025-03-04 10:07:30,707 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:30,708 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:30,708 INFO L85 PathProgramCache]: Analyzing trace with hash -692811240, now seen corresponding path program 1 times [2025-03-04 10:07:30,708 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:30,708 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751673604] [2025-03-04 10:07:30,708 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:30,708 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:30,715 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-04 10:07:30,724 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 10:07:30,724 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:30,724 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:31,039 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2025-03-04 10:07:31,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:31,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751673604] [2025-03-04 10:07:31,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751673604] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:07:31,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [353900624] [2025-03-04 10:07:31,040 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:31,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:31,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:07:31,042 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) [2025-03-04 10:07:31,044 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-03-04 10:07:31,091 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 16 statements into 1 equivalence classes. [2025-03-04 10:07:31,111 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 16 of 16 statements. [2025-03-04 10:07:31,112 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:31,112 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:31,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 228 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-04 10:07:31,115 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:07:31,121 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:07:31,165 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-04 10:07:31,166 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-03-04 10:07:31,184 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2025-03-04 10:07:31,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2025-03-04 10:07:31,243 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-04 10:07:31,244 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-03-04 10:07:31,266 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2025-03-04 10:07:31,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2025-03-04 10:07:31,305 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-04 10:07:31,306 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-03-04 10:07:31,317 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2025-03-04 10:07:31,317 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2025-03-04 10:07:31,353 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:07:31,353 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:07:31,353 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [353900624] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:07:31,353 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-04 10:07:31,353 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [5] total 9 [2025-03-04 10:07:31,353 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130794643] [2025-03-04 10:07:31,353 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:07:31,354 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2025-03-04 10:07:31,354 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:31,354 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2025-03-04 10:07:31,354 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2025-03-04 10:07:31,504 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 82 [2025-03-04 10:07:31,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 93 transitions, 384 flow. Second operand has 6 states, 6 states have (on average 38.5) internal successors, (231), 6 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:31,504 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:31,504 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 82 [2025-03-04 10:07:31,504 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:31,674 INFO L124 PetriNetUnfolderBase]: 759/2069 cut-off events. [2025-03-04 10:07:31,674 INFO L125 PetriNetUnfolderBase]: For 27/27 co-relation queries the response was YES. [2025-03-04 10:07:31,677 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3445 conditions, 2069 events. 759/2069 cut-off events. For 27/27 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 16237 event pairs, 452 based on Foata normal form. 80/1715 useless extension candidates. Maximal degree in co-relation 1694. Up to 1222 conditions per place. [2025-03-04 10:07:31,682 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 59 selfloop transitions, 3 changer transitions 0/89 dead transitions. [2025-03-04 10:07:31,683 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 89 transitions, 500 flow [2025-03-04 10:07:31,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:07:31,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:07:31,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 182 transitions. [2025-03-04 10:07:31,684 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2025-03-04 10:07:31,684 INFO L175 Difference]: Start difference. First operand has 98 places, 93 transitions, 384 flow. Second operand 4 states and 182 transitions. [2025-03-04 10:07:31,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 89 transitions, 500 flow [2025-03-04 10:07:31,686 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 89 transitions, 490 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:07:31,686 INFO L231 Difference]: Finished difference. Result has 94 places, 89 transitions, 372 flow [2025-03-04 10:07:31,687 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=366, PETRI_DIFFERENCE_MINUEND_PLACES=91, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=86, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=372, PETRI_PLACES=94, PETRI_TRANSITIONS=89} [2025-03-04 10:07:31,687 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 16 predicate places. [2025-03-04 10:07:31,687 INFO L471 AbstractCegarLoop]: Abstraction has has 94 places, 89 transitions, 372 flow [2025-03-04 10:07:31,687 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 38.5) internal successors, (231), 6 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:31,687 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:31,687 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:31,693 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-03-04 10:07:31,887 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,SelfDestructingSolverStorable14 [2025-03-04 10:07:31,888 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:31,888 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:31,888 INFO L85 PathProgramCache]: Analyzing trace with hash -2311088, now seen corresponding path program 1 times [2025-03-04 10:07:31,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:31,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506427089] [2025-03-04 10:07:31,888 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:31,888 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:31,899 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-04 10:07:31,910 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 10:07:31,910 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:31,910 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:32,002 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 9 proven. 6 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-04 10:07:32,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:32,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506427089] [2025-03-04 10:07:32,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506427089] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:07:32,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1027196229] [2025-03-04 10:07:32,002 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:32,002 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:32,003 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:07:32,005 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) [2025-03-04 10:07:32,006 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-03-04 10:07:32,061 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-04 10:07:32,081 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 10:07:32,082 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:32,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:32,086 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 14 conjuncts are in the unsatisfiable core [2025-03-04 10:07:32,087 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:07:32,090 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:07:32,107 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-03-04 10:07:32,107 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-03-04 10:07:32,123 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-03-04 10:07:32,124 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-03-04 10:07:32,136 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-04 10:07:32,137 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-03-04 10:07:32,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1027196229] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:07:32,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2025-03-04 10:07:32,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 4 [2025-03-04 10:07:32,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [234734907] [2025-03-04 10:07:32,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:07:32,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:07:32,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:32,137 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:07:32,138 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-04 10:07:32,174 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 82 [2025-03-04 10:07:32,175 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 89 transitions, 372 flow. Second operand has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:32,175 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:32,175 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 82 [2025-03-04 10:07:32,175 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:32,315 INFO L124 PetriNetUnfolderBase]: 863/2085 cut-off events. [2025-03-04 10:07:32,315 INFO L125 PetriNetUnfolderBase]: For 21/21 co-relation queries the response was YES. [2025-03-04 10:07:32,318 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3625 conditions, 2085 events. 863/2085 cut-off events. For 21/21 co-relation queries the response was YES. Maximal size of possible extension queue 130. Compared 15236 event pairs, 532 based on Foata normal form. 0/1831 useless extension candidates. Maximal degree in co-relation 1784. Up to 1372 conditions per place. [2025-03-04 10:07:32,323 INFO L140 encePairwiseOnDemand]: 76/82 looper letters, 58 selfloop transitions, 5 changer transitions 0/85 dead transitions. [2025-03-04 10:07:32,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 85 transitions, 490 flow [2025-03-04 10:07:32,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:07:32,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:07:32,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 195 transitions. [2025-03-04 10:07:32,325 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2025-03-04 10:07:32,325 INFO L175 Difference]: Start difference. First operand has 94 places, 89 transitions, 372 flow. Second operand 4 states and 195 transitions. [2025-03-04 10:07:32,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 85 transitions, 490 flow [2025-03-04 10:07:32,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 85 transitions, 486 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:07:32,327 INFO L231 Difference]: Finished difference. Result has 91 places, 85 transitions, 370 flow [2025-03-04 10:07:32,327 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=360, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=80, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=370, PETRI_PLACES=91, PETRI_TRANSITIONS=85} [2025-03-04 10:07:32,327 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 13 predicate places. [2025-03-04 10:07:32,327 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 85 transitions, 370 flow [2025-03-04 10:07:32,327 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 43.0) internal successors, (172), 4 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:32,327 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:32,328 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:32,334 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-03-04 10:07:32,528 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-03-04 10:07:32,528 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting thread1Err9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:32,528 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:32,528 INFO L85 PathProgramCache]: Analyzing trace with hash -2311087, now seen corresponding path program 1 times [2025-03-04 10:07:32,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:32,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1449738302] [2025-03-04 10:07:32,529 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:32,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:32,539 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-04 10:07:32,549 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 10:07:32,550 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:32,550 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:32,789 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-04 10:07:32,789 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:32,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1449738302] [2025-03-04 10:07:32,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1449738302] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:07:32,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913340631] [2025-03-04 10:07:32,790 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:32,790 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:32,790 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:07:32,792 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) [2025-03-04 10:07:32,794 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-03-04 10:07:32,848 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-03-04 10:07:32,869 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-03-04 10:07:32,869 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:32,869 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:32,871 INFO L256 TraceCheckSpWp]: Trace formula consists of 234 conjuncts, 28 conjuncts are in the unsatisfiable core [2025-03-04 10:07:32,872 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:07:32,878 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:07:32,929 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-03-04 10:07:32,929 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 19 treesize of output 18 [2025-03-04 10:07:32,944 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2025-03-04 10:07:32,945 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2025-03-04 10:07:32,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-04 10:07:32,982 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 14 [2025-03-04 10:07:32,988 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-04 10:07:32,988 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-04 10:07:33,024 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 7 proven. 9 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-04 10:07:33,024 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:07:33,201 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 188 treesize of output 182 [2025-03-04 10:07:33,347 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-04 10:07:33,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 102 treesize of output 100 [2025-03-04 10:07:33,354 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 10 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2025-03-04 10:07:33,355 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913340631] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:07:33,355 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:07:33,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2025-03-04 10:07:33,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939758923] [2025-03-04 10:07:33,355 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:07:33,355 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2025-03-04 10:07:33,356 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:33,356 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2025-03-04 10:07:33,356 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2025-03-04 10:07:34,022 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 33 out of 82 [2025-03-04 10:07:34,023 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 85 transitions, 370 flow. Second operand has 15 states, 15 states have (on average 35.8) internal successors, (537), 15 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:34,023 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:34,023 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 33 of 82 [2025-03-04 10:07:34,023 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:34,305 INFO L124 PetriNetUnfolderBase]: 863/1961 cut-off events. [2025-03-04 10:07:34,305 INFO L125 PetriNetUnfolderBase]: For 26/26 co-relation queries the response was YES. [2025-03-04 10:07:34,308 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3505 conditions, 1961 events. 863/1961 cut-off events. For 26/26 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 13580 event pairs, 532 based on Foata normal form. 0/1707 useless extension candidates. Maximal degree in co-relation 1724. Up to 1340 conditions per place. [2025-03-04 10:07:34,313 INFO L140 encePairwiseOnDemand]: 72/82 looper letters, 49 selfloop transitions, 14 changer transitions 0/81 dead transitions. [2025-03-04 10:07:34,313 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 81 transitions, 488 flow [2025-03-04 10:07:34,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-03-04 10:07:34,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-03-04 10:07:34,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 271 transitions. [2025-03-04 10:07:34,315 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4721254355400697 [2025-03-04 10:07:34,315 INFO L175 Difference]: Start difference. First operand has 91 places, 85 transitions, 370 flow. Second operand 7 states and 271 transitions. [2025-03-04 10:07:34,315 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 81 transitions, 488 flow [2025-03-04 10:07:34,317 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 81 transitions, 482 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:07:34,318 INFO L231 Difference]: Finished difference. Result has 91 places, 81 transitions, 384 flow [2025-03-04 10:07:34,318 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=14, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=67, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=384, PETRI_PLACES=91, PETRI_TRANSITIONS=81} [2025-03-04 10:07:34,318 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 13 predicate places. [2025-03-04 10:07:34,318 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 81 transitions, 384 flow [2025-03-04 10:07:34,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 35.8) internal successors, (537), 15 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:34,319 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:34,319 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:34,325 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-03-04 10:07:34,523 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-03-04 10:07:34,523 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:34,523 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:34,523 INFO L85 PathProgramCache]: Analyzing trace with hash -71642822, now seen corresponding path program 1 times [2025-03-04 10:07:34,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:34,523 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164568434] [2025-03-04 10:07:34,523 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:34,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:34,529 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-04 10:07:34,536 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 10:07:34,536 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:34,536 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:34,596 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 14 proven. 3 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2025-03-04 10:07:34,597 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:34,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164568434] [2025-03-04 10:07:34,597 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164568434] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:07:34,597 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268653647] [2025-03-04 10:07:34,597 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:34,597 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:34,597 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:07:34,599 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) [2025-03-04 10:07:34,602 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-03-04 10:07:34,654 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-04 10:07:34,676 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 10:07:34,676 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:34,676 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:34,677 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 9 conjuncts are in the unsatisfiable core [2025-03-04 10:07:34,678 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:07:34,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:07:34,691 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-03-04 10:07:34,691 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2025-03-04 10:07:34,703 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-04 10:07:34,703 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:07:34,719 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 9 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-04 10:07:34,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1268653647] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:07:34,720 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:07:34,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 4 [2025-03-04 10:07:34,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504089686] [2025-03-04 10:07:34,720 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:07:34,720 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-03-04 10:07:34,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:34,720 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-03-04 10:07:34,721 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-03-04 10:07:34,777 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 82 [2025-03-04 10:07:34,778 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 81 transitions, 384 flow. Second operand has 5 states, 5 states have (on average 46.6) internal successors, (233), 5 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:34,778 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:34,778 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 82 [2025-03-04 10:07:34,778 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:34,906 INFO L124 PetriNetUnfolderBase]: 759/1773 cut-off events. [2025-03-04 10:07:34,907 INFO L125 PetriNetUnfolderBase]: For 32/32 co-relation queries the response was YES. [2025-03-04 10:07:34,909 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3168 conditions, 1773 events. 759/1773 cut-off events. For 32/32 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 12213 event pairs, 452 based on Foata normal form. 0/1577 useless extension candidates. Maximal degree in co-relation 1552. Up to 1176 conditions per place. [2025-03-04 10:07:34,913 INFO L140 encePairwiseOnDemand]: 77/82 looper letters, 52 selfloop transitions, 10 changer transitions 0/79 dead transitions. [2025-03-04 10:07:34,913 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 79 transitions, 504 flow [2025-03-04 10:07:34,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2025-03-04 10:07:34,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2025-03-04 10:07:34,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 246 transitions. [2025-03-04 10:07:34,914 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6 [2025-03-04 10:07:34,915 INFO L175 Difference]: Start difference. First operand has 91 places, 81 transitions, 384 flow. Second operand 5 states and 246 transitions. [2025-03-04 10:07:34,915 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 79 transitions, 504 flow [2025-03-04 10:07:34,916 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 79 transitions, 478 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-04 10:07:34,917 INFO L231 Difference]: Finished difference. Result has 88 places, 79 transitions, 374 flow [2025-03-04 10:07:34,917 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=84, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=374, PETRI_PLACES=88, PETRI_TRANSITIONS=79} [2025-03-04 10:07:34,918 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 10 predicate places. [2025-03-04 10:07:34,918 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 79 transitions, 374 flow [2025-03-04 10:07:34,918 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 46.6) internal successors, (233), 5 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:34,918 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:34,918 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:34,925 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-03-04 10:07:35,118 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,SelfDestructingSolverStorable17 [2025-03-04 10:07:35,122 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:35,123 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:35,123 INFO L85 PathProgramCache]: Analyzing trace with hash -71642821, now seen corresponding path program 1 times [2025-03-04 10:07:35,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:35,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474730967] [2025-03-04 10:07:35,123 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:35,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:35,128 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-04 10:07:35,134 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 10:07:35,135 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:35,135 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:35,287 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:07:35,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:35,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474730967] [2025-03-04 10:07:35,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [474730967] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:07:35,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1215559332] [2025-03-04 10:07:35,288 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:35,288 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:35,288 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:07:35,290 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) [2025-03-04 10:07:35,291 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-03-04 10:07:35,346 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 18 statements into 1 equivalence classes. [2025-03-04 10:07:35,368 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 18 of 18 statements. [2025-03-04 10:07:35,369 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:35,369 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:35,370 INFO L256 TraceCheckSpWp]: Trace formula consists of 240 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-04 10:07:35,372 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:07:35,411 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:07:35,457 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-04 10:07:35,458 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 11 [2025-03-04 10:07:35,467 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-04 10:07:35,468 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-04 10:07:35,513 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:07:35,513 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:07:35,591 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 53 treesize of output 49 [2025-03-04 10:07:35,645 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-03-04 10:07:35,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 32 treesize of output 37 [2025-03-04 10:07:35,698 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:07:35,698 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1215559332] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:07:35,699 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:07:35,699 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-03-04 10:07:35,699 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703584203] [2025-03-04 10:07:35,699 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:07:35,699 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-03-04 10:07:35,699 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:35,699 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-03-04 10:07:35,699 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-03-04 10:07:36,514 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 82 [2025-03-04 10:07:36,515 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 79 transitions, 374 flow. Second operand has 18 states, 18 states have (on average 44.611111111111114) internal successors, (803), 18 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:36,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:36,515 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 82 [2025-03-04 10:07:36,515 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:36,844 INFO L124 PetriNetUnfolderBase]: 881/2049 cut-off events. [2025-03-04 10:07:36,844 INFO L125 PetriNetUnfolderBase]: For 36/36 co-relation queries the response was YES. [2025-03-04 10:07:36,847 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3666 conditions, 2049 events. 881/2049 cut-off events. For 36/36 co-relation queries the response was YES. Maximal size of possible extension queue 136. Compared 14607 event pairs, 374 based on Foata normal form. 0/1793 useless extension candidates. Maximal degree in co-relation 2086. Up to 588 conditions per place. [2025-03-04 10:07:36,851 INFO L140 encePairwiseOnDemand]: 67/82 looper letters, 77 selfloop transitions, 29 changer transitions 0/121 dead transitions. [2025-03-04 10:07:36,851 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 121 transitions, 695 flow [2025-03-04 10:07:36,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-04 10:07:36,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-04 10:07:36,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 636 transitions. [2025-03-04 10:07:36,853 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5966228893058161 [2025-03-04 10:07:36,853 INFO L175 Difference]: Start difference. First operand has 88 places, 79 transitions, 374 flow. Second operand 13 states and 636 transitions. [2025-03-04 10:07:36,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 121 transitions, 695 flow [2025-03-04 10:07:36,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 121 transitions, 675 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-03-04 10:07:36,855 INFO L231 Difference]: Finished difference. Result has 102 places, 85 transitions, 486 flow [2025-03-04 10:07:36,855 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=356, PETRI_DIFFERENCE_MINUEND_PLACES=85, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=79, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=486, PETRI_PLACES=102, PETRI_TRANSITIONS=85} [2025-03-04 10:07:36,855 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 24 predicate places. [2025-03-04 10:07:36,855 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 85 transitions, 486 flow [2025-03-04 10:07:36,856 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 44.611111111111114) internal successors, (803), 18 states have internal predecessors, (803), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:36,856 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:36,856 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:36,862 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2025-03-04 10:07:37,056 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:37,056 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:37,058 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:37,058 INFO L85 PathProgramCache]: Analyzing trace with hash -313959497, now seen corresponding path program 2 times [2025-03-04 10:07:37,058 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:37,058 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1418236497] [2025-03-04 10:07:37,058 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:07:37,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:37,068 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-04 10:07:37,074 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 10:07:37,074 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 10:07:37,074 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:37,156 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:07:37,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:37,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1418236497] [2025-03-04 10:07:37,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1418236497] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:07:37,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809851698] [2025-03-04 10:07:37,157 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:07:37,157 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:37,157 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:07:37,159 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) [2025-03-04 10:07:37,160 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-03-04 10:07:37,219 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 20 statements into 2 equivalence classes. [2025-03-04 10:07:37,241 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 10:07:37,241 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 10:07:37,241 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:37,243 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-04 10:07:37,244 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:07:37,296 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 16 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:07:37,296 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:07:37,346 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:07:37,347 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [809851698] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:07:37,347 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:07:37,347 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2025-03-04 10:07:37,347 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1970075833] [2025-03-04 10:07:37,347 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:07:37,347 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-04 10:07:37,348 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:37,348 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-04 10:07:37,349 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-03-04 10:07:37,459 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:07:37,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 85 transitions, 486 flow. Second operand has 14 states, 14 states have (on average 48.357142857142854) internal successors, (677), 14 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:37,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:37,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:07:37,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:37,722 INFO L124 PetriNetUnfolderBase]: 827/1915 cut-off events. [2025-03-04 10:07:37,722 INFO L125 PetriNetUnfolderBase]: For 292/316 co-relation queries the response was YES. [2025-03-04 10:07:37,725 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3715 conditions, 1915 events. 827/1915 cut-off events. For 292/316 co-relation queries the response was YES. Maximal size of possible extension queue 118. Compared 13179 event pairs, 508 based on Foata normal form. 2/1717 useless extension candidates. Maximal degree in co-relation 2210. Up to 726 conditions per place. [2025-03-04 10:07:37,729 INFO L140 encePairwiseOnDemand]: 72/82 looper letters, 72 selfloop transitions, 23 changer transitions 0/112 dead transitions. [2025-03-04 10:07:37,729 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 111 places, 112 transitions, 742 flow [2025-03-04 10:07:37,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:07:37,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:07:37,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 533 transitions. [2025-03-04 10:07:37,730 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.65 [2025-03-04 10:07:37,730 INFO L175 Difference]: Start difference. First operand has 102 places, 85 transitions, 486 flow. Second operand 10 states and 533 transitions. [2025-03-04 10:07:37,730 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 111 places, 112 transitions, 742 flow [2025-03-04 10:07:37,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 112 transitions, 698 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-04 10:07:37,733 INFO L231 Difference]: Finished difference. Result has 106 places, 91 transitions, 534 flow [2025-03-04 10:07:37,734 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=442, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=534, PETRI_PLACES=106, PETRI_TRANSITIONS=91} [2025-03-04 10:07:37,734 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 28 predicate places. [2025-03-04 10:07:37,734 INFO L471 AbstractCegarLoop]: Abstraction has has 106 places, 91 transitions, 534 flow [2025-03-04 10:07:37,734 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 48.357142857142854) internal successors, (677), 14 states have internal predecessors, (677), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:37,734 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:37,734 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] [2025-03-04 10:07:37,741 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2025-03-04 10:07:37,935 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,SelfDestructingSolverStorable19 [2025-03-04 10:07:37,936 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread2Err6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:37,936 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:37,936 INFO L85 PathProgramCache]: Analyzing trace with hash -2118879758, now seen corresponding path program 1 times [2025-03-04 10:07:37,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:37,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723186130] [2025-03-04 10:07:37,937 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:37,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:37,946 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-04 10:07:37,951 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 10:07:37,951 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:37,951 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:37,982 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 17 trivial. 0 not checked. [2025-03-04 10:07:37,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:37,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723186130] [2025-03-04 10:07:37,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [723186130] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:07:37,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:07:37,983 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:07:37,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467536916] [2025-03-04 10:07:37,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:07:37,983 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-03-04 10:07:37,983 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:37,984 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-03-04 10:07:37,984 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-03-04 10:07:38,014 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 82 [2025-03-04 10:07:38,015 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 106 places, 91 transitions, 534 flow. Second operand has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:38,015 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:38,015 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 82 [2025-03-04 10:07:38,015 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:38,163 INFO L124 PetriNetUnfolderBase]: 817/1849 cut-off events. [2025-03-04 10:07:38,164 INFO L125 PetriNetUnfolderBase]: For 276/296 co-relation queries the response was YES. [2025-03-04 10:07:38,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3671 conditions, 1849 events. 817/1849 cut-off events. For 276/296 co-relation queries the response was YES. Maximal size of possible extension queue 111. Compared 12361 event pairs, 492 based on Foata normal form. 0/1713 useless extension candidates. Maximal degree in co-relation 2196. Up to 1284 conditions per place. [2025-03-04 10:07:38,170 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 66 selfloop transitions, 8 changer transitions 0/89 dead transitions. [2025-03-04 10:07:38,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 89 transitions, 678 flow [2025-03-04 10:07:38,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-03-04 10:07:38,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-03-04 10:07:38,170 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 204 transitions. [2025-03-04 10:07:38,171 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6219512195121951 [2025-03-04 10:07:38,171 INFO L175 Difference]: Start difference. First operand has 106 places, 91 transitions, 534 flow. Second operand 4 states and 204 transitions. [2025-03-04 10:07:38,171 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 89 transitions, 678 flow [2025-03-04 10:07:38,172 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 89 transitions, 650 flow, removed 5 selfloop flow, removed 4 redundant places. [2025-03-04 10:07:38,173 INFO L231 Difference]: Finished difference. Result has 103 places, 89 transitions, 518 flow [2025-03-04 10:07:38,173 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=502, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=81, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=518, PETRI_PLACES=103, PETRI_TRANSITIONS=89} [2025-03-04 10:07:38,174 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 25 predicate places. [2025-03-04 10:07:38,174 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 89 transitions, 518 flow [2025-03-04 10:07:38,174 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.75) internal successors, (187), 4 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:38,174 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:38,174 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] [2025-03-04 10:07:38,174 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2025-03-04 10:07:38,174 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:38,174 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:38,174 INFO L85 PathProgramCache]: Analyzing trace with hash -2118879757, now seen corresponding path program 1 times [2025-03-04 10:07:38,175 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:38,175 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273378749] [2025-03-04 10:07:38,175 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:38,175 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:38,180 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-04 10:07:38,184 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 10:07:38,184 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:38,184 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:38,322 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 12 proven. 6 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:07:38,322 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:38,322 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273378749] [2025-03-04 10:07:38,323 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [273378749] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:07:38,323 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199223510] [2025-03-04 10:07:38,323 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:38,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:38,323 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:07:38,324 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) [2025-03-04 10:07:38,326 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-03-04 10:07:38,385 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 20 statements into 1 equivalence classes. [2025-03-04 10:07:38,405 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 20 of 20 statements. [2025-03-04 10:07:38,405 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:38,405 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:38,406 INFO L256 TraceCheckSpWp]: Trace formula consists of 256 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-03-04 10:07:38,409 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:07:38,509 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 3 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:07:38,509 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:07:38,546 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 23 treesize of output 19 [2025-03-04 10:07:38,603 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 6 proven. 12 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:07:38,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1199223510] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:07:38,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:07:38,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2025-03-04 10:07:38,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335398829] [2025-03-04 10:07:38,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:07:38,604 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-03-04 10:07:38,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:38,604 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-03-04 10:07:38,605 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2025-03-04 10:07:38,963 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-04 10:07:38,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 89 transitions, 518 flow. Second operand has 19 states, 19 states have (on average 46.473684210526315) internal successors, (883), 19 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:38,963 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:38,963 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-04 10:07:38,963 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:39,288 INFO L124 PetriNetUnfolderBase]: 953/2095 cut-off events. [2025-03-04 10:07:39,288 INFO L125 PetriNetUnfolderBase]: For 297/320 co-relation queries the response was YES. [2025-03-04 10:07:39,292 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4175 conditions, 2095 events. 953/2095 cut-off events. For 297/320 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 13995 event pairs, 404 based on Foata normal form. 0/1913 useless extension candidates. Maximal degree in co-relation 2442. Up to 642 conditions per place. [2025-03-04 10:07:39,296 INFO L140 encePairwiseOnDemand]: 67/82 looper letters, 96 selfloop transitions, 28 changer transitions 0/137 dead transitions. [2025-03-04 10:07:39,296 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 113 places, 137 transitions, 922 flow [2025-03-04 10:07:39,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-03-04 10:07:39,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-03-04 10:07:39,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 573 transitions. [2025-03-04 10:07:39,298 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6352549889135255 [2025-03-04 10:07:39,298 INFO L175 Difference]: Start difference. First operand has 103 places, 89 transitions, 518 flow. Second operand 11 states and 573 transitions. [2025-03-04 10:07:39,298 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 113 places, 137 transitions, 922 flow [2025-03-04 10:07:39,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 137 transitions, 910 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:07:39,301 INFO L231 Difference]: Finished difference. Result has 115 places, 93 transitions, 618 flow [2025-03-04 10:07:39,301 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=506, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=618, PETRI_PLACES=115, PETRI_TRANSITIONS=93} [2025-03-04 10:07:39,302 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 37 predicate places. [2025-03-04 10:07:39,302 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 93 transitions, 618 flow [2025-03-04 10:07:39,302 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 46.473684210526315) internal successors, (883), 19 states have internal predecessors, (883), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:39,302 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:39,302 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:39,309 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2025-03-04 10:07:39,503 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:39,503 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread1Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:39,503 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:39,503 INFO L85 PathProgramCache]: Analyzing trace with hash 14617429, now seen corresponding path program 1 times [2025-03-04 10:07:39,503 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:39,503 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915489148] [2025-03-04 10:07:39,503 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:39,503 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:39,511 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-04 10:07:39,516 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-04 10:07:39,516 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:39,516 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:39,580 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 6 proven. 15 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:07:39,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:39,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915489148] [2025-03-04 10:07:39,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1915489148] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:07:39,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1578796902] [2025-03-04 10:07:39,580 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:39,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:39,581 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:07:39,583 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) [2025-03-04 10:07:39,584 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-03-04 10:07:39,658 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 22 statements into 1 equivalence classes. [2025-03-04 10:07:39,687 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 22 of 22 statements. [2025-03-04 10:07:39,687 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:39,687 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:39,688 INFO L256 TraceCheckSpWp]: Trace formula consists of 261 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-03-04 10:07:39,689 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:07:39,736 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 7 proven. 14 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:07:39,736 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:07:39,778 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 10 proven. 11 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2025-03-04 10:07:39,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1578796902] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:07:39,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:07:39,778 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2025-03-04 10:07:39,778 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052902477] [2025-03-04 10:07:39,778 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:07:39,779 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-03-04 10:07:39,779 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:39,779 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-03-04 10:07:39,779 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2025-03-04 10:07:39,888 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:07:39,889 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 93 transitions, 618 flow. Second operand has 14 states, 14 states have (on average 48.42857142857143) internal successors, (678), 14 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:39,889 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:39,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:07:39,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:40,159 INFO L124 PetriNetUnfolderBase]: 905/2017 cut-off events. [2025-03-04 10:07:40,159 INFO L125 PetriNetUnfolderBase]: For 534/572 co-relation queries the response was YES. [2025-03-04 10:07:40,163 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4309 conditions, 2017 events. 905/2017 cut-off events. For 534/572 co-relation queries the response was YES. Maximal size of possible extension queue 117. Compared 13369 event pairs, 558 based on Foata normal form. 2/1881 useless extension candidates. Maximal degree in co-relation 2590. Up to 812 conditions per place. [2025-03-04 10:07:40,167 INFO L140 encePairwiseOnDemand]: 72/82 looper letters, 73 selfloop transitions, 40 changer transitions 0/128 dead transitions. [2025-03-04 10:07:40,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 128 transitions, 977 flow [2025-03-04 10:07:40,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:07:40,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:07:40,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 530 transitions. [2025-03-04 10:07:40,168 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6463414634146342 [2025-03-04 10:07:40,168 INFO L175 Difference]: Start difference. First operand has 115 places, 93 transitions, 618 flow. Second operand 10 states and 530 transitions. [2025-03-04 10:07:40,168 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 128 transitions, 977 flow [2025-03-04 10:07:40,170 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 128 transitions, 952 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-04 10:07:40,171 INFO L231 Difference]: Finished difference. Result has 122 places, 105 transitions, 790 flow [2025-03-04 10:07:40,171 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=593, PETRI_DIFFERENCE_MINUEND_PLACES=110, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=790, PETRI_PLACES=122, PETRI_TRANSITIONS=105} [2025-03-04 10:07:40,172 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 44 predicate places. [2025-03-04 10:07:40,172 INFO L471 AbstractCegarLoop]: Abstraction has has 122 places, 105 transitions, 790 flow [2025-03-04 10:07:40,172 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 48.42857142857143) internal successors, (678), 14 states have internal predecessors, (678), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:40,172 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:40,172 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:40,181 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2025-03-04 10:07:40,372 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22,16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:40,373 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread1Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:40,373 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:40,373 INFO L85 PathProgramCache]: Analyzing trace with hash -102758658, now seen corresponding path program 3 times [2025-03-04 10:07:40,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:40,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080220286] [2025-03-04 10:07:40,373 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 10:07:40,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:40,380 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 5 equivalence classes. [2025-03-04 10:07:40,404 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 20 of 22 statements. [2025-03-04 10:07:40,404 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-04 10:07:40,404 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:40,584 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-04 10:07:40,584 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:40,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080220286] [2025-03-04 10:07:40,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080220286] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:07:40,584 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [441260986] [2025-03-04 10:07:40,584 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 10:07:40,584 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:40,585 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:07:40,587 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) [2025-03-04 10:07:40,588 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-03-04 10:07:40,648 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 22 statements into 5 equivalence classes. [2025-03-04 10:07:40,728 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 20 of 22 statements. [2025-03-04 10:07:40,728 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-03-04 10:07:40,728 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:40,729 INFO L256 TraceCheckSpWp]: Trace formula consists of 253 conjuncts, 35 conjuncts are in the unsatisfiable core [2025-03-04 10:07:40,732 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:07:40,802 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:07:40,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2025-03-04 10:07:40,856 INFO L190 IndexEqualityManager]: detected not equals via solver [2025-03-04 10:07:40,856 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2025-03-04 10:07:40,861 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-03-04 10:07:40,862 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2025-03-04 10:07:40,894 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 8 proven. 25 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-04 10:07:40,894 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:07:41,024 INFO L173 IndexEqualityManager]: detected equality via solver [2025-03-04 10:07:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 14 proven. 19 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2025-03-04 10:07:41,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [441260986] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:07:41,168 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:07:41,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 8, 8] total 22 [2025-03-04 10:07:41,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1293416496] [2025-03-04 10:07:41,169 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:07:41,169 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-03-04 10:07:41,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:41,170 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-03-04 10:07:41,170 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=135, Invalid=417, Unknown=0, NotChecked=0, Total=552 [2025-03-04 10:07:42,200 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 82 [2025-03-04 10:07:42,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 105 transitions, 790 flow. Second operand has 24 states, 24 states have (on average 44.333333333333336) internal successors, (1064), 24 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:42,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:42,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 82 [2025-03-04 10:07:42,201 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:42,916 INFO L124 PetriNetUnfolderBase]: 1349/2942 cut-off events. [2025-03-04 10:07:42,916 INFO L125 PetriNetUnfolderBase]: For 956/969 co-relation queries the response was YES. [2025-03-04 10:07:42,922 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6352 conditions, 2942 events. 1349/2942 cut-off events. For 956/969 co-relation queries the response was YES. Maximal size of possible extension queue 150. Compared 20517 event pairs, 851 based on Foata normal form. 80/2837 useless extension candidates. Maximal degree in co-relation 4581. Up to 754 conditions per place. [2025-03-04 10:07:42,927 INFO L140 encePairwiseOnDemand]: 71/82 looper letters, 141 selfloop transitions, 32 changer transitions 0/186 dead transitions. [2025-03-04 10:07:42,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 186 transitions, 1620 flow [2025-03-04 10:07:42,927 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-03-04 10:07:42,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-03-04 10:07:42,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 865 transitions. [2025-03-04 10:07:42,930 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5860433604336044 [2025-03-04 10:07:42,930 INFO L175 Difference]: Start difference. First operand has 122 places, 105 transitions, 790 flow. Second operand 18 states and 865 transitions. [2025-03-04 10:07:42,930 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 186 transitions, 1620 flow [2025-03-04 10:07:42,934 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 130 places, 186 transitions, 1557 flow, removed 9 selfloop flow, removed 7 redundant places. [2025-03-04 10:07:42,936 INFO L231 Difference]: Finished difference. Result has 134 places, 117 transitions, 982 flow [2025-03-04 10:07:42,937 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=735, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=103, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=75, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=982, PETRI_PLACES=134, PETRI_TRANSITIONS=117} [2025-03-04 10:07:42,937 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 56 predicate places. [2025-03-04 10:07:42,937 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 117 transitions, 982 flow [2025-03-04 10:07:42,938 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 44.333333333333336) internal successors, (1064), 24 states have internal predecessors, (1064), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:42,938 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:42,938 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:42,945 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-03-04 10:07:43,138 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,SelfDestructingSolverStorable23 [2025-03-04 10:07:43,139 INFO L396 AbstractCegarLoop]: === Iteration 25 === Targeting thread2Err7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:43,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:43,139 INFO L85 PathProgramCache]: Analyzing trace with hash 1161846484, now seen corresponding path program 2 times [2025-03-04 10:07:43,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:43,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [994783915] [2025-03-04 10:07:43,139 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:07:43,139 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:43,147 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-04 10:07:43,153 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-04 10:07:43,154 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 10:07:43,154 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:43,315 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 23 proven. 8 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-04 10:07:43,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:43,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [994783915] [2025-03-04 10:07:43,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [994783915] provided 0 perfect and 1 imperfect interpolant sequences [2025-03-04 10:07:43,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110969335] [2025-03-04 10:07:43,316 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:07:43,316 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:43,316 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-03-04 10:07:43,318 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) [2025-03-04 10:07:43,319 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-03-04 10:07:43,384 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 24 statements into 2 equivalence classes. [2025-03-04 10:07:43,409 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 24 of 24 statements. [2025-03-04 10:07:43,410 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-03-04 10:07:43,410 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:43,414 INFO L256 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-03-04 10:07:43,415 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-03-04 10:07:43,522 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 28 proven. 3 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-04 10:07:43,522 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-03-04 10:07:43,568 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 [2025-03-04 10:07:43,637 INFO L134 CoverageAnalysis]: Checked inductivity of 41 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2025-03-04 10:07:43,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110969335] provided 0 perfect and 2 imperfect interpolant sequences [2025-03-04 10:07:43,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-03-04 10:07:43,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 19 [2025-03-04 10:07:43,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713497577] [2025-03-04 10:07:43,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-03-04 10:07:43,638 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2025-03-04 10:07:43,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:43,639 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2025-03-04 10:07:43,639 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2025-03-04 10:07:44,091 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 82 [2025-03-04 10:07:44,092 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 117 transitions, 982 flow. Second operand has 20 states, 20 states have (on average 46.9) internal successors, (938), 20 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:44,092 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:44,092 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 82 [2025-03-04 10:07:44,092 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:44,527 INFO L124 PetriNetUnfolderBase]: 1295/2759 cut-off events. [2025-03-04 10:07:44,527 INFO L125 PetriNetUnfolderBase]: For 658/658 co-relation queries the response was YES. [2025-03-04 10:07:44,532 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5955 conditions, 2759 events. 1295/2759 cut-off events. For 658/658 co-relation queries the response was YES. Maximal size of possible extension queue 139. Compared 18614 event pairs, 805 based on Foata normal form. 63/2647 useless extension candidates. Maximal degree in co-relation 3862. Up to 1113 conditions per place. [2025-03-04 10:07:44,535 INFO L140 encePairwiseOnDemand]: 71/82 looper letters, 83 selfloop transitions, 44 changer transitions 0/138 dead transitions. [2025-03-04 10:07:44,536 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 144 places, 138 transitions, 1288 flow [2025-03-04 10:07:44,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-03-04 10:07:44,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-03-04 10:07:44,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 639 transitions. [2025-03-04 10:07:44,537 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.599437148217636 [2025-03-04 10:07:44,537 INFO L175 Difference]: Start difference. First operand has 134 places, 117 transitions, 982 flow. Second operand 13 states and 639 transitions. [2025-03-04 10:07:44,537 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 144 places, 138 transitions, 1288 flow [2025-03-04 10:07:44,540 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 138 transitions, 1265 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-03-04 10:07:44,541 INFO L231 Difference]: Finished difference. Result has 136 places, 115 transitions, 1035 flow [2025-03-04 10:07:44,542 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=947, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=71, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1035, PETRI_PLACES=136, PETRI_TRANSITIONS=115} [2025-03-04 10:07:44,542 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 58 predicate places. [2025-03-04 10:07:44,542 INFO L471 AbstractCegarLoop]: Abstraction has has 136 places, 115 transitions, 1035 flow [2025-03-04 10:07:44,542 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 46.9) internal successors, (938), 20 states have internal predecessors, (938), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:44,543 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:44,543 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:44,549 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-03-04 10:07:44,747 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-03-04 10:07:44,747 INFO L396 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:44,748 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:44,748 INFO L85 PathProgramCache]: Analyzing trace with hash 1612315122, now seen corresponding path program 1 times [2025-03-04 10:07:44,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:44,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601108362] [2025-03-04 10:07:44,748 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:44,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:44,754 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 35 statements into 1 equivalence classes. [2025-03-04 10:07:44,758 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 35 of 35 statements. [2025-03-04 10:07:44,758 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:44,758 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:44,773 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:07:44,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:44,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601108362] [2025-03-04 10:07:44,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601108362] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:07:44,774 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:07:44,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:07:44,774 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1260030904] [2025-03-04 10:07:44,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:07:44,774 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:07:44,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:44,775 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:07:44,775 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:07:44,776 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 82 [2025-03-04 10:07:44,777 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 136 places, 115 transitions, 1035 flow. Second operand has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:44,777 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:44,777 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 82 [2025-03-04 10:07:44,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:45,053 INFO L124 PetriNetUnfolderBase]: 1982/3760 cut-off events. [2025-03-04 10:07:45,053 INFO L125 PetriNetUnfolderBase]: For 473/473 co-relation queries the response was YES. [2025-03-04 10:07:45,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8289 conditions, 3760 events. 1982/3760 cut-off events. For 473/473 co-relation queries the response was YES. Maximal size of possible extension queue 172. Compared 24357 event pairs, 964 based on Foata normal form. 0/3456 useless extension candidates. Maximal degree in co-relation 4166. Up to 2331 conditions per place. [2025-03-04 10:07:45,063 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 117 selfloop transitions, 3 changer transitions 0/128 dead transitions. [2025-03-04 10:07:45,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 128 transitions, 1309 flow [2025-03-04 10:07:45,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:07:45,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:07:45,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 179 transitions. [2025-03-04 10:07:45,064 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7276422764227642 [2025-03-04 10:07:45,064 INFO L175 Difference]: Start difference. First operand has 136 places, 115 transitions, 1035 flow. Second operand 3 states and 179 transitions. [2025-03-04 10:07:45,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 128 transitions, 1309 flow [2025-03-04 10:07:45,068 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 133 places, 128 transitions, 1282 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-03-04 10:07:45,069 INFO L231 Difference]: Finished difference. Result has 135 places, 117 transitions, 1030 flow [2025-03-04 10:07:45,069 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1008, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=112, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1030, PETRI_PLACES=135, PETRI_TRANSITIONS=117} [2025-03-04 10:07:45,070 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 57 predicate places. [2025-03-04 10:07:45,070 INFO L471 AbstractCegarLoop]: Abstraction has has 135 places, 117 transitions, 1030 flow [2025-03-04 10:07:45,070 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.333333333333336) internal successors, (160), 3 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:45,070 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:45,070 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:45,070 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2025-03-04 10:07:45,070 INFO L396 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:45,071 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:45,071 INFO L85 PathProgramCache]: Analyzing trace with hash 727918196, now seen corresponding path program 1 times [2025-03-04 10:07:45,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:45,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230134640] [2025-03-04 10:07:45,071 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:45,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:45,078 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 36 statements into 1 equivalence classes. [2025-03-04 10:07:45,082 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 36 of 36 statements. [2025-03-04 10:07:45,082 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:45,082 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:45,099 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:07:45,099 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:45,099 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230134640] [2025-03-04 10:07:45,099 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1230134640] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:07:45,099 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:07:45,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-03-04 10:07:45,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929440011] [2025-03-04 10:07:45,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:07:45,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-03-04 10:07:45,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:45,100 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-03-04 10:07:45,100 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-03-04 10:07:45,102 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 82 [2025-03-04 10:07:45,102 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 135 places, 117 transitions, 1030 flow. Second operand has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:45,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:45,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 82 [2025-03-04 10:07:45,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:45,451 INFO L124 PetriNetUnfolderBase]: 2098/3980 cut-off events. [2025-03-04 10:07:45,452 INFO L125 PetriNetUnfolderBase]: For 1117/1197 co-relation queries the response was YES. [2025-03-04 10:07:45,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9677 conditions, 3980 events. 2098/3980 cut-off events. For 1117/1197 co-relation queries the response was YES. Maximal size of possible extension queue 183. Compared 26361 event pairs, 1118 based on Foata normal form. 80/3794 useless extension candidates. Maximal degree in co-relation 7325. Up to 2537 conditions per place. [2025-03-04 10:07:45,465 INFO L140 encePairwiseOnDemand]: 78/82 looper letters, 118 selfloop transitions, 3 changer transitions 0/130 dead transitions. [2025-03-04 10:07:45,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 137 places, 130 transitions, 1314 flow [2025-03-04 10:07:45,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-03-04 10:07:45,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-03-04 10:07:45,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 178 transitions. [2025-03-04 10:07:45,466 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.7235772357723578 [2025-03-04 10:07:45,466 INFO L175 Difference]: Start difference. First operand has 135 places, 117 transitions, 1030 flow. Second operand 3 states and 178 transitions. [2025-03-04 10:07:45,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 137 places, 130 transitions, 1314 flow [2025-03-04 10:07:45,477 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 130 transitions, 1306 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:07:45,478 INFO L231 Difference]: Finished difference. Result has 137 places, 119 transitions, 1046 flow [2025-03-04 10:07:45,478 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1024, PETRI_DIFFERENCE_MINUEND_PLACES=133, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=117, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=114, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1046, PETRI_PLACES=137, PETRI_TRANSITIONS=119} [2025-03-04 10:07:45,479 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 59 predicate places. [2025-03-04 10:07:45,479 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 119 transitions, 1046 flow [2025-03-04 10:07:45,479 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 53.666666666666664) internal successors, (161), 3 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:45,479 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:45,479 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:45,479 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2025-03-04 10:07:45,479 INFO L396 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:45,480 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:45,480 INFO L85 PathProgramCache]: Analyzing trace with hash 1773488084, now seen corresponding path program 1 times [2025-03-04 10:07:45,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:45,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [287228663] [2025-03-04 10:07:45,480 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-03-04 10:07:45,480 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:45,487 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-04 10:07:45,497 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-04 10:07:45,497 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:45,497 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:45,873 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:07:45,873 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:45,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [287228663] [2025-03-04 10:07:45,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [287228663] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:07:45,874 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:07:45,874 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-04 10:07:45,874 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1862661304] [2025-03-04 10:07:45,874 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:07:45,874 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:07:45,874 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:45,875 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:07:45,875 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:07:46,082 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:07:46,083 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 119 transitions, 1046 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:46,083 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:46,083 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:07:46,083 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:47,141 INFO L124 PetriNetUnfolderBase]: 4726/9647 cut-off events. [2025-03-04 10:07:47,141 INFO L125 PetriNetUnfolderBase]: For 3381/3713 co-relation queries the response was YES. [2025-03-04 10:07:47,166 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24108 conditions, 9647 events. 4726/9647 cut-off events. For 3381/3713 co-relation queries the response was YES. Maximal size of possible extension queue 521. Compared 83354 event pairs, 265 based on Foata normal form. 338/9851 useless extension candidates. Maximal degree in co-relation 17495. Up to 2231 conditions per place. [2025-03-04 10:07:47,186 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 193 selfloop transitions, 6 changer transitions 7/219 dead transitions. [2025-03-04 10:07:47,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 146 places, 219 transitions, 1818 flow [2025-03-04 10:07:47,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:07:47,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:07:47,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 572 transitions. [2025-03-04 10:07:47,187 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.697560975609756 [2025-03-04 10:07:47,187 INFO L175 Difference]: Start difference. First operand has 137 places, 119 transitions, 1046 flow. Second operand 10 states and 572 transitions. [2025-03-04 10:07:47,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 146 places, 219 transitions, 1818 flow [2025-03-04 10:07:47,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 144 places, 219 transitions, 1800 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-03-04 10:07:47,278 INFO L231 Difference]: Finished difference. Result has 152 places, 124 transitions, 1093 flow [2025-03-04 10:07:47,278 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1040, PETRI_DIFFERENCE_MINUEND_PLACES=135, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=113, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1093, PETRI_PLACES=152, PETRI_TRANSITIONS=124} [2025-03-04 10:07:47,278 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 74 predicate places. [2025-03-04 10:07:47,278 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 124 transitions, 1093 flow [2025-03-04 10:07:47,279 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:47,279 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:47,279 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:47,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2025-03-04 10:07:47,279 INFO L396 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:47,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:47,279 INFO L85 PathProgramCache]: Analyzing trace with hash 1690261926, now seen corresponding path program 2 times [2025-03-04 10:07:47,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:47,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019742237] [2025-03-04 10:07:47,280 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:07:47,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:47,286 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-04 10:07:47,288 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-03-04 10:07:47,288 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-04 10:07:47,288 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:47,549 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:07:47,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:47,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019742237] [2025-03-04 10:07:47,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2019742237] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:07:47,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:07:47,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-04 10:07:47,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1471132832] [2025-03-04 10:07:47,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:07:47,549 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:07:47,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:47,550 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:07:47,550 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:07:47,874 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:07:47,874 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 124 transitions, 1093 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:47,874 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:47,874 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:07:47,874 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:49,017 INFO L124 PetriNetUnfolderBase]: 4895/10428 cut-off events. [2025-03-04 10:07:49,017 INFO L125 PetriNetUnfolderBase]: For 6814/7182 co-relation queries the response was YES. [2025-03-04 10:07:49,045 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28114 conditions, 10428 events. 4895/10428 cut-off events. For 6814/7182 co-relation queries the response was YES. Maximal size of possible extension queue 590. Compared 95014 event pairs, 656 based on Foata normal form. 374/10682 useless extension candidates. Maximal degree in co-relation 27821. Up to 5137 conditions per place. [2025-03-04 10:07:49,066 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 166 selfloop transitions, 8 changer transitions 6/193 dead transitions. [2025-03-04 10:07:49,066 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 193 transitions, 1744 flow [2025-03-04 10:07:49,067 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:07:49,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:07:49,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 550 transitions. [2025-03-04 10:07:49,069 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6707317073170732 [2025-03-04 10:07:49,069 INFO L175 Difference]: Start difference. First operand has 152 places, 124 transitions, 1093 flow. Second operand 10 states and 550 transitions. [2025-03-04 10:07:49,069 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 193 transitions, 1744 flow [2025-03-04 10:07:49,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 156 places, 193 transitions, 1725 flow, removed 7 selfloop flow, removed 3 redundant places. [2025-03-04 10:07:49,192 INFO L231 Difference]: Finished difference. Result has 161 places, 126 transitions, 1125 flow [2025-03-04 10:07:49,192 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1086, PETRI_DIFFERENCE_MINUEND_PLACES=147, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1125, PETRI_PLACES=161, PETRI_TRANSITIONS=126} [2025-03-04 10:07:49,192 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 83 predicate places. [2025-03-04 10:07:49,193 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 126 transitions, 1125 flow [2025-03-04 10:07:49,193 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:49,193 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:49,193 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:49,193 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2025-03-04 10:07:49,193 INFO L396 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:49,193 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:49,193 INFO L85 PathProgramCache]: Analyzing trace with hash -1900566262, now seen corresponding path program 3 times [2025-03-04 10:07:49,193 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:49,193 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851715082] [2025-03-04 10:07:49,194 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 10:07:49,194 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:49,200 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 4 equivalence classes. [2025-03-04 10:07:49,203 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-03-04 10:07:49,203 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-04 10:07:49,204 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:49,488 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:07:49,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:49,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851715082] [2025-03-04 10:07:49,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851715082] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:07:49,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:07:49,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-04 10:07:49,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1276446438] [2025-03-04 10:07:49,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:07:49,489 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:07:49,489 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:49,489 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:07:49,489 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:07:49,898 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:07:49,899 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 126 transitions, 1125 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:49,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:49,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:07:49,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:51,363 INFO L124 PetriNetUnfolderBase]: 5345/11796 cut-off events. [2025-03-04 10:07:51,363 INFO L125 PetriNetUnfolderBase]: For 12182/12628 co-relation queries the response was YES. [2025-03-04 10:07:51,400 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33447 conditions, 11796 events. 5345/11796 cut-off events. For 12182/12628 co-relation queries the response was YES. Maximal size of possible extension queue 652. Compared 112839 event pairs, 1043 based on Foata normal form. 452/12062 useless extension candidates. Maximal degree in co-relation 32935. Up to 5760 conditions per place. [2025-03-04 10:07:51,424 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 165 selfloop transitions, 11 changer transitions 7/196 dead transitions. [2025-03-04 10:07:51,424 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 196 transitions, 1794 flow [2025-03-04 10:07:51,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:07:51,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:07:51,425 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 557 transitions. [2025-03-04 10:07:51,425 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6792682926829269 [2025-03-04 10:07:51,425 INFO L175 Difference]: Start difference. First operand has 161 places, 126 transitions, 1125 flow. Second operand 10 states and 557 transitions. [2025-03-04 10:07:51,425 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 196 transitions, 1794 flow [2025-03-04 10:07:51,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 163 places, 196 transitions, 1738 flow, removed 11 selfloop flow, removed 5 redundant places. [2025-03-04 10:07:51,560 INFO L231 Difference]: Finished difference. Result has 168 places, 128 transitions, 1156 flow [2025-03-04 10:07:51,560 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1108, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=126, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1156, PETRI_PLACES=168, PETRI_TRANSITIONS=128} [2025-03-04 10:07:51,561 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 90 predicate places. [2025-03-04 10:07:51,561 INFO L471 AbstractCegarLoop]: Abstraction has has 168 places, 128 transitions, 1156 flow [2025-03-04 10:07:51,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:51,561 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:51,561 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:51,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2025-03-04 10:07:51,562 INFO L396 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:51,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:51,562 INFO L85 PathProgramCache]: Analyzing trace with hash 1338068944, now seen corresponding path program 4 times [2025-03-04 10:07:51,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:51,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [806427990] [2025-03-04 10:07:51,562 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 10:07:51,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:51,569 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-03-04 10:07:51,572 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-03-04 10:07:51,572 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-04 10:07:51,572 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:51,818 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:07:51,818 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:51,818 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [806427990] [2025-03-04 10:07:51,818 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [806427990] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:07:51,818 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:07:51,818 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-04 10:07:51,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1046277753] [2025-03-04 10:07:51,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:07:51,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:07:51,819 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:51,819 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:07:51,819 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:07:52,272 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:07:52,273 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 168 places, 128 transitions, 1156 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:52,273 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:52,273 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:07:52,273 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:53,698 INFO L124 PetriNetUnfolderBase]: 5531/12498 cut-off events. [2025-03-04 10:07:53,698 INFO L125 PetriNetUnfolderBase]: For 16962/17396 co-relation queries the response was YES. [2025-03-04 10:07:53,743 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36525 conditions, 12498 events. 5531/12498 cut-off events. For 16962/17396 co-relation queries the response was YES. Maximal size of possible extension queue 704. Compared 122537 event pairs, 1044 based on Foata normal form. 440/12769 useless extension candidates. Maximal degree in co-relation 35938. Up to 7225 conditions per place. [2025-03-04 10:07:53,773 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 171 selfloop transitions, 11 changer transitions 6/201 dead transitions. [2025-03-04 10:07:53,774 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 175 places, 201 transitions, 1910 flow [2025-03-04 10:07:53,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:07:53,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:07:53,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 556 transitions. [2025-03-04 10:07:53,775 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6780487804878049 [2025-03-04 10:07:53,775 INFO L175 Difference]: Start difference. First operand has 168 places, 128 transitions, 1156 flow. Second operand 10 states and 556 transitions. [2025-03-04 10:07:53,775 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 175 places, 201 transitions, 1910 flow [2025-03-04 10:07:53,953 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 201 transitions, 1845 flow, removed 13 selfloop flow, removed 5 redundant places. [2025-03-04 10:07:53,955 INFO L231 Difference]: Finished difference. Result has 175 places, 131 transitions, 1191 flow [2025-03-04 10:07:53,956 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=161, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=128, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1191, PETRI_PLACES=175, PETRI_TRANSITIONS=131} [2025-03-04 10:07:53,956 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 97 predicate places. [2025-03-04 10:07:53,956 INFO L471 AbstractCegarLoop]: Abstraction has has 175 places, 131 transitions, 1191 flow [2025-03-04 10:07:53,956 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:53,956 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:53,956 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:53,956 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2025-03-04 10:07:53,956 INFO L396 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:53,957 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:53,957 INFO L85 PathProgramCache]: Analyzing trace with hash -56907382, now seen corresponding path program 5 times [2025-03-04 10:07:53,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:53,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231196559] [2025-03-04 10:07:53,957 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 10:07:53,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:53,964 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 4 equivalence classes. [2025-03-04 10:07:53,984 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 37 of 37 statements. [2025-03-04 10:07:53,984 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-04 10:07:53,984 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:54,450 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:07:54,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:54,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231196559] [2025-03-04 10:07:54,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231196559] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:07:54,451 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:07:54,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-04 10:07:54,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154567642] [2025-03-04 10:07:54,451 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:07:54,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:07:54,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:54,452 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:07:54,452 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:07:54,805 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:07:54,805 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 175 places, 131 transitions, 1191 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:54,805 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:54,805 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:07:54,805 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:56,441 INFO L124 PetriNetUnfolderBase]: 5887/13442 cut-off events. [2025-03-04 10:07:56,442 INFO L125 PetriNetUnfolderBase]: For 23043/23477 co-relation queries the response was YES. [2025-03-04 10:07:56,488 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40752 conditions, 13442 events. 5887/13442 cut-off events. For 23043/23477 co-relation queries the response was YES. Maximal size of possible extension queue 749. Compared 134389 event pairs, 1151 based on Foata normal form. 440/13693 useless extension candidates. Maximal degree in co-relation 40090. Up to 8100 conditions per place. [2025-03-04 10:07:56,516 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 171 selfloop transitions, 14 changer transitions 7/205 dead transitions. [2025-03-04 10:07:56,516 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 205 transitions, 1952 flow [2025-03-04 10:07:56,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:07:56,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:07:56,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 559 transitions. [2025-03-04 10:07:56,517 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6817073170731708 [2025-03-04 10:07:56,517 INFO L175 Difference]: Start difference. First operand has 175 places, 131 transitions, 1191 flow. Second operand 10 states and 559 transitions. [2025-03-04 10:07:56,517 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 205 transitions, 1952 flow [2025-03-04 10:07:56,711 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 176 places, 205 transitions, 1877 flow, removed 8 selfloop flow, removed 6 redundant places. [2025-03-04 10:07:56,713 INFO L231 Difference]: Finished difference. Result has 181 places, 134 transitions, 1231 flow [2025-03-04 10:07:56,713 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1164, PETRI_DIFFERENCE_MINUEND_PLACES=167, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=131, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=118, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1231, PETRI_PLACES=181, PETRI_TRANSITIONS=134} [2025-03-04 10:07:56,713 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 103 predicate places. [2025-03-04 10:07:56,713 INFO L471 AbstractCegarLoop]: Abstraction has has 181 places, 134 transitions, 1231 flow [2025-03-04 10:07:56,714 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:56,714 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:56,714 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:56,714 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2025-03-04 10:07:56,714 INFO L396 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:56,714 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:56,714 INFO L85 PathProgramCache]: Analyzing trace with hash -209828378, now seen corresponding path program 6 times [2025-03-04 10:07:56,714 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:56,714 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542144278] [2025-03-04 10:07:56,714 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 10:07:56,714 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:56,721 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 37 statements into 4 equivalence classes. [2025-03-04 10:07:56,723 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-03-04 10:07:56,723 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-04 10:07:56,723 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:07:56,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:56,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542144278] [2025-03-04 10:07:56,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [542144278] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:07:56,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:07:56,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-04 10:07:56,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2003038883] [2025-03-04 10:07:56,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:07:56,916 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:07:56,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:56,917 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:07:56,917 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:07:57,143 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:07:57,143 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 181 places, 134 transitions, 1231 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:57,143 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:57,143 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:07:57,143 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:07:58,742 INFO L124 PetriNetUnfolderBase]: 6922/15684 cut-off events. [2025-03-04 10:07:58,743 INFO L125 PetriNetUnfolderBase]: For 37299/37885 co-relation queries the response was YES. [2025-03-04 10:07:58,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49204 conditions, 15684 events. 6922/15684 cut-off events. For 37299/37885 co-relation queries the response was YES. Maximal size of possible extension queue 907. Compared 160253 event pairs, 1502 based on Foata normal form. 592/16025 useless extension candidates. Maximal degree in co-relation 48419. Up to 8643 conditions per place. [2025-03-04 10:07:58,867 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 182 selfloop transitions, 14 changer transitions 6/215 dead transitions. [2025-03-04 10:07:58,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 188 places, 215 transitions, 2086 flow [2025-03-04 10:07:58,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:07:58,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:07:58,870 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 561 transitions. [2025-03-04 10:07:58,870 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6841463414634147 [2025-03-04 10:07:58,870 INFO L175 Difference]: Start difference. First operand has 181 places, 134 transitions, 1231 flow. Second operand 10 states and 561 transitions. [2025-03-04 10:07:58,870 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 188 places, 215 transitions, 2086 flow [2025-03-04 10:07:59,292 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 215 transitions, 2000 flow, removed 11 selfloop flow, removed 6 redundant places. [2025-03-04 10:07:59,294 INFO L231 Difference]: Finished difference. Result has 189 places, 138 transitions, 1288 flow [2025-03-04 10:07:59,294 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1196, PETRI_DIFFERENCE_MINUEND_PLACES=173, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=120, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1288, PETRI_PLACES=189, PETRI_TRANSITIONS=138} [2025-03-04 10:07:59,294 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 111 predicate places. [2025-03-04 10:07:59,294 INFO L471 AbstractCegarLoop]: Abstraction has has 189 places, 138 transitions, 1288 flow [2025-03-04 10:07:59,295 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:59,295 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:07:59,295 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:07:59,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2025-03-04 10:07:59,295 INFO L396 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:07:59,295 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:07:59,295 INFO L85 PathProgramCache]: Analyzing trace with hash -2106528016, now seen corresponding path program 7 times [2025-03-04 10:07:59,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:07:59,296 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [934223879] [2025-03-04 10:07:59,296 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 10:07:59,296 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:07:59,301 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-04 10:07:59,308 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-04 10:07:59,308 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:07:59,308 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:07:59,592 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:07:59,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:07:59,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [934223879] [2025-03-04 10:07:59,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [934223879] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:07:59,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:07:59,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-04 10:07:59,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015715523] [2025-03-04 10:07:59,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:07:59,593 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:07:59,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:07:59,593 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:07:59,593 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:07:59,785 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:07:59,785 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 189 places, 138 transitions, 1288 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:07:59,785 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:07:59,785 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:07:59,785 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:08:01,578 INFO L124 PetriNetUnfolderBase]: 7045/16059 cut-off events. [2025-03-04 10:08:01,578 INFO L125 PetriNetUnfolderBase]: For 41302/41845 co-relation queries the response was YES. [2025-03-04 10:08:01,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50991 conditions, 16059 events. 7045/16059 cut-off events. For 41302/41845 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 165627 event pairs, 1048 based on Foata normal form. 549/16375 useless extension candidates. Maximal degree in co-relation 50177. Up to 8859 conditions per place. [2025-03-04 10:08:01,697 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 186 selfloop transitions, 15 changer transitions 7/221 dead transitions. [2025-03-04 10:08:01,697 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 196 places, 221 transitions, 2163 flow [2025-03-04 10:08:01,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:08:01,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:08:01,698 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 563 transitions. [2025-03-04 10:08:01,698 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6865853658536586 [2025-03-04 10:08:01,698 INFO L175 Difference]: Start difference. First operand has 189 places, 138 transitions, 1288 flow. Second operand 10 states and 563 transitions. [2025-03-04 10:08:01,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 196 places, 221 transitions, 2163 flow [2025-03-04 10:08:02,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 192 places, 221 transitions, 2114 flow, removed 15 selfloop flow, removed 4 redundant places. [2025-03-04 10:08:02,042 INFO L231 Difference]: Finished difference. Result has 199 places, 142 transitions, 1363 flow [2025-03-04 10:08:02,042 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1260, PETRI_DIFFERENCE_MINUEND_PLACES=183, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=138, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=123, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1363, PETRI_PLACES=199, PETRI_TRANSITIONS=142} [2025-03-04 10:08:02,042 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 121 predicate places. [2025-03-04 10:08:02,042 INFO L471 AbstractCegarLoop]: Abstraction has has 199 places, 142 transitions, 1363 flow [2025-03-04 10:08:02,042 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:02,042 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:08:02,042 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:08:02,042 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2025-03-04 10:08:02,042 INFO L396 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:08:02,043 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:08:02,043 INFO L85 PathProgramCache]: Analyzing trace with hash -1075750852, now seen corresponding path program 8 times [2025-03-04 10:08:02,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:08:02,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256607323] [2025-03-04 10:08:02,044 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:08:02,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:08:02,050 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-04 10:08:02,052 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-03-04 10:08:02,052 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-04 10:08:02,052 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:08:02,316 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:08:02,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:08:02,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256607323] [2025-03-04 10:08:02,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256607323] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:08:02,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:08:02,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-04 10:08:02,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881310899] [2025-03-04 10:08:02,317 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:08:02,317 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:08:02,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:08:02,318 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:08:02,318 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:08:02,622 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:08:02,622 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 199 places, 142 transitions, 1363 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:02,622 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:08:02,622 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:08:02,622 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:08:04,808 INFO L124 PetriNetUnfolderBase]: 7018/16012 cut-off events. [2025-03-04 10:08:04,809 INFO L125 PetriNetUnfolderBase]: For 56078/56660 co-relation queries the response was YES. [2025-03-04 10:08:04,906 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53055 conditions, 16012 events. 7018/16012 cut-off events. For 56078/56660 co-relation queries the response was YES. Maximal size of possible extension queue 915. Compared 164078 event pairs, 2173 based on Foata normal form. 588/16229 useless extension candidates. Maximal degree in co-relation 52212. Up to 7373 conditions per place. [2025-03-04 10:08:04,955 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 196 selfloop transitions, 13 changer transitions 6/228 dead transitions. [2025-03-04 10:08:04,956 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 228 transitions, 2281 flow [2025-03-04 10:08:04,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:08:04,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:08:04,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 568 transitions. [2025-03-04 10:08:04,957 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6926829268292682 [2025-03-04 10:08:04,957 INFO L175 Difference]: Start difference. First operand has 199 places, 142 transitions, 1363 flow. Second operand 10 states and 568 transitions. [2025-03-04 10:08:04,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 228 transitions, 2281 flow [2025-03-04 10:08:05,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 202 places, 228 transitions, 2232 flow, removed 15 selfloop flow, removed 4 redundant places. [2025-03-04 10:08:05,422 INFO L231 Difference]: Finished difference. Result has 210 places, 147 transitions, 1451 flow [2025-03-04 10:08:05,422 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1330, PETRI_DIFFERENCE_MINUEND_PLACES=193, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=129, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1451, PETRI_PLACES=210, PETRI_TRANSITIONS=147} [2025-03-04 10:08:05,422 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 132 predicate places. [2025-03-04 10:08:05,422 INFO L471 AbstractCegarLoop]: Abstraction has has 210 places, 147 transitions, 1451 flow [2025-03-04 10:08:05,422 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:05,423 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:08:05,423 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:08:05,423 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2025-03-04 10:08:05,423 INFO L396 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:08:05,423 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:08:05,423 INFO L85 PathProgramCache]: Analyzing trace with hash -1074049306, now seen corresponding path program 9 times [2025-03-04 10:08:05,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:08:05,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1744222126] [2025-03-04 10:08:05,423 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 10:08:05,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:08:05,429 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 4 equivalence classes. [2025-03-04 10:08:05,431 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-03-04 10:08:05,431 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-04 10:08:05,431 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:08:05,609 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:08:05,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:08:05,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1744222126] [2025-03-04 10:08:05,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1744222126] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:08:05,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:08:05,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-04 10:08:05,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1715383808] [2025-03-04 10:08:05,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:08:05,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:08:05,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:08:05,610 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:08:05,610 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:08:05,791 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:08:05,792 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 210 places, 147 transitions, 1451 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:05,792 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:08:05,792 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:08:05,792 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:08:07,607 INFO L124 PetriNetUnfolderBase]: 7021/16005 cut-off events. [2025-03-04 10:08:07,607 INFO L125 PetriNetUnfolderBase]: For 64360/64941 co-relation queries the response was YES. [2025-03-04 10:08:07,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54717 conditions, 16005 events. 7021/16005 cut-off events. For 64360/64941 co-relation queries the response was YES. Maximal size of possible extension queue 914. Compared 164213 event pairs, 1560 based on Foata normal form. 587/16349 useless extension candidates. Maximal degree in co-relation 53868. Up to 8955 conditions per place. [2025-03-04 10:08:07,755 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 192 selfloop transitions, 20 changer transitions 6/231 dead transitions. [2025-03-04 10:08:07,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 217 places, 231 transitions, 2371 flow [2025-03-04 10:08:07,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:08:07,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:08:07,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 559 transitions. [2025-03-04 10:08:07,756 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6817073170731708 [2025-03-04 10:08:07,756 INFO L175 Difference]: Start difference. First operand has 210 places, 147 transitions, 1451 flow. Second operand 10 states and 559 transitions. [2025-03-04 10:08:07,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 217 places, 231 transitions, 2371 flow [2025-03-04 10:08:08,289 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 214 places, 231 transitions, 2310 flow, removed 28 selfloop flow, removed 3 redundant places. [2025-03-04 10:08:08,292 INFO L231 Difference]: Finished difference. Result has 220 places, 150 transitions, 1523 flow [2025-03-04 10:08:08,292 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1414, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=147, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=127, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1523, PETRI_PLACES=220, PETRI_TRANSITIONS=150} [2025-03-04 10:08:08,292 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 142 predicate places. [2025-03-04 10:08:08,292 INFO L471 AbstractCegarLoop]: Abstraction has has 220 places, 150 transitions, 1523 flow [2025-03-04 10:08:08,292 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:08,292 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:08:08,292 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:08:08,293 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2025-03-04 10:08:08,293 INFO L396 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:08:08,293 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:08:08,293 INFO L85 PathProgramCache]: Analyzing trace with hash 373600104, now seen corresponding path program 10 times [2025-03-04 10:08:08,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:08:08,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790582675] [2025-03-04 10:08:08,293 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 10:08:08,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:08:08,301 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-03-04 10:08:08,303 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-03-04 10:08:08,304 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-04 10:08:08,304 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:08:08,601 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:08:08,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:08:08,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790582675] [2025-03-04 10:08:08,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790582675] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:08:08,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:08:08,601 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-04 10:08:08,601 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [208055133] [2025-03-04 10:08:08,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:08:08,602 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:08:08,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:08:08,602 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:08:08,602 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:08:08,877 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:08:08,878 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 220 places, 150 transitions, 1523 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:08,878 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:08:08,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:08:08,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:08:10,889 INFO L124 PetriNetUnfolderBase]: 7183/16407 cut-off events. [2025-03-04 10:08:10,889 INFO L125 PetriNetUnfolderBase]: For 69314/69911 co-relation queries the response was YES. [2025-03-04 10:08:10,962 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57068 conditions, 16407 events. 7183/16407 cut-off events. For 69314/69911 co-relation queries the response was YES. Maximal size of possible extension queue 944. Compared 169303 event pairs, 1759 based on Foata normal form. 603/16711 useless extension candidates. Maximal degree in co-relation 56167. Up to 8955 conditions per place. [2025-03-04 10:08:11,000 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 189 selfloop transitions, 18 changer transitions 7/227 dead transitions. [2025-03-04 10:08:11,000 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 227 transitions, 2431 flow [2025-03-04 10:08:11,000 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:08:11,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:08:11,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 560 transitions. [2025-03-04 10:08:11,001 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2025-03-04 10:08:11,001 INFO L175 Difference]: Start difference. First operand has 220 places, 150 transitions, 1523 flow. Second operand 10 states and 560 transitions. [2025-03-04 10:08:11,001 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 227 transitions, 2431 flow [2025-03-04 10:08:11,612 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 227 transitions, 2322 flow, removed 42 selfloop flow, removed 5 redundant places. [2025-03-04 10:08:11,614 INFO L231 Difference]: Finished difference. Result has 226 places, 152 transitions, 1544 flow [2025-03-04 10:08:11,614 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1472, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=150, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1544, PETRI_PLACES=226, PETRI_TRANSITIONS=152} [2025-03-04 10:08:11,615 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 148 predicate places. [2025-03-04 10:08:11,615 INFO L471 AbstractCegarLoop]: Abstraction has has 226 places, 152 transitions, 1544 flow [2025-03-04 10:08:11,615 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:11,615 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:08:11,615 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:08:11,616 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2025-03-04 10:08:11,616 INFO L396 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:08:11,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:08:11,616 INFO L85 PathProgramCache]: Analyzing trace with hash -1836645934, now seen corresponding path program 11 times [2025-03-04 10:08:11,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:08:11,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680778414] [2025-03-04 10:08:11,616 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 10:08:11,616 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:08:11,623 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 4 equivalence classes. [2025-03-04 10:08:11,641 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 37 of 37 statements. [2025-03-04 10:08:11,641 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-04 10:08:11,641 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:08:11,918 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:08:11,918 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:08:11,918 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680778414] [2025-03-04 10:08:11,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1680778414] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:08:11,918 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:08:11,918 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-04 10:08:11,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394673935] [2025-03-04 10:08:11,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:08:11,918 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:08:11,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:08:11,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:08:11,919 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:08:12,089 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:08:12,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 226 places, 152 transitions, 1544 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:12,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:08:12,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:08:12,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:08:14,424 INFO L124 PetriNetUnfolderBase]: 7177/16413 cut-off events. [2025-03-04 10:08:14,424 INFO L125 PetriNetUnfolderBase]: For 60322/60903 co-relation queries the response was YES. [2025-03-04 10:08:14,518 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55936 conditions, 16413 events. 7177/16413 cut-off events. For 60322/60903 co-relation queries the response was YES. Maximal size of possible extension queue 946. Compared 169565 event pairs, 1614 based on Foata normal form. 587/16757 useless extension candidates. Maximal degree in co-relation 55033. Up to 8955 conditions per place. [2025-03-04 10:08:14,554 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 190 selfloop transitions, 21 changer transitions 7/231 dead transitions. [2025-03-04 10:08:14,554 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 231 transitions, 2414 flow [2025-03-04 10:08:14,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:08:14,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:08:14,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 559 transitions. [2025-03-04 10:08:14,556 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6817073170731708 [2025-03-04 10:08:14,556 INFO L175 Difference]: Start difference. First operand has 226 places, 152 transitions, 1544 flow. Second operand 10 states and 559 transitions. [2025-03-04 10:08:14,556 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 231 transitions, 2414 flow [2025-03-04 10:08:15,015 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 226 places, 231 transitions, 2357 flow, removed 10 selfloop flow, removed 7 redundant places. [2025-03-04 10:08:15,018 INFO L231 Difference]: Finished difference. Result has 231 places, 154 transitions, 1586 flow [2025-03-04 10:08:15,018 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1501, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=152, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1586, PETRI_PLACES=231, PETRI_TRANSITIONS=154} [2025-03-04 10:08:15,018 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 153 predicate places. [2025-03-04 10:08:15,018 INFO L471 AbstractCegarLoop]: Abstraction has has 231 places, 154 transitions, 1586 flow [2025-03-04 10:08:15,019 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:15,019 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:08:15,019 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:08:15,019 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2025-03-04 10:08:15,019 INFO L396 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:08:15,019 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:08:15,019 INFO L85 PathProgramCache]: Analyzing trace with hash -2121566182, now seen corresponding path program 12 times [2025-03-04 10:08:15,019 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:08:15,019 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945959517] [2025-03-04 10:08:15,019 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 10:08:15,020 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:08:15,027 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 37 statements into 4 equivalence classes. [2025-03-04 10:08:15,029 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-03-04 10:08:15,029 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-04 10:08:15,029 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:08:15,426 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:08:15,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:08:15,426 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945959517] [2025-03-04 10:08:15,426 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945959517] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:08:15,426 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:08:15,426 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-04 10:08:15,426 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1685097421] [2025-03-04 10:08:15,426 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:08:15,427 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:08:15,427 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:08:15,427 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:08:15,427 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:08:15,648 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:08:15,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 231 places, 154 transitions, 1586 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:15,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:08:15,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:08:15,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:08:17,745 INFO L124 PetriNetUnfolderBase]: 7171/16413 cut-off events. [2025-03-04 10:08:17,746 INFO L125 PetriNetUnfolderBase]: For 62994/63557 co-relation queries the response was YES. [2025-03-04 10:08:17,845 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56332 conditions, 16413 events. 7171/16413 cut-off events. For 62994/63557 co-relation queries the response was YES. Maximal size of possible extension queue 947. Compared 169633 event pairs, 1698 based on Foata normal form. 569/16715 useless extension candidates. Maximal degree in co-relation 55426. Up to 8955 conditions per place. [2025-03-04 10:08:17,890 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 184 selfloop transitions, 23 changer transitions 6/226 dead transitions. [2025-03-04 10:08:17,890 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 226 transitions, 2415 flow [2025-03-04 10:08:17,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:08:17,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:08:17,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 553 transitions. [2025-03-04 10:08:17,891 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6743902439024391 [2025-03-04 10:08:17,891 INFO L175 Difference]: Start difference. First operand has 231 places, 154 transitions, 1586 flow. Second operand 10 states and 553 transitions. [2025-03-04 10:08:17,891 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 226 transitions, 2415 flow [2025-03-04 10:08:18,389 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 232 places, 226 transitions, 2374 flow, removed 4 selfloop flow, removed 6 redundant places. [2025-03-04 10:08:18,391 INFO L231 Difference]: Finished difference. Result has 236 places, 156 transitions, 1641 flow [2025-03-04 10:08:18,391 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1549, PETRI_DIFFERENCE_MINUEND_PLACES=223, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1641, PETRI_PLACES=236, PETRI_TRANSITIONS=156} [2025-03-04 10:08:18,394 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 158 predicate places. [2025-03-04 10:08:18,394 INFO L471 AbstractCegarLoop]: Abstraction has has 236 places, 156 transitions, 1641 flow [2025-03-04 10:08:18,394 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:18,394 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:08:18,394 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:08:18,394 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2025-03-04 10:08:18,395 INFO L396 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:08:18,395 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:08:18,395 INFO L85 PathProgramCache]: Analyzing trace with hash 2124396124, now seen corresponding path program 13 times [2025-03-04 10:08:18,395 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:08:18,395 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963415720] [2025-03-04 10:08:18,395 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 10:08:18,396 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:08:18,411 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-04 10:08:18,422 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-04 10:08:18,422 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:08:18,422 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:08:18,725 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:08:18,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:08:18,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963415720] [2025-03-04 10:08:18,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963415720] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:08:18,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:08:18,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-04 10:08:18,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059662182] [2025-03-04 10:08:18,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:08:18,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:08:18,726 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:08:18,726 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:08:18,726 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:08:18,886 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:08:18,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 236 places, 156 transitions, 1641 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:18,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:08:18,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:08:18,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:08:21,069 INFO L124 PetriNetUnfolderBase]: 7165/16443 cut-off events. [2025-03-04 10:08:21,069 INFO L125 PetriNetUnfolderBase]: For 65474/66025 co-relation queries the response was YES. [2025-03-04 10:08:21,155 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56937 conditions, 16443 events. 7165/16443 cut-off events. For 65474/66025 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 170412 event pairs, 1524 based on Foata normal form. 557/16757 useless extension candidates. Maximal degree in co-relation 56029. Up to 8955 conditions per place. [2025-03-04 10:08:21,193 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 180 selfloop transitions, 25 changer transitions 6/224 dead transitions. [2025-03-04 10:08:21,193 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 243 places, 224 transitions, 2444 flow [2025-03-04 10:08:21,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:08:21,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:08:21,194 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 552 transitions. [2025-03-04 10:08:21,194 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6731707317073171 [2025-03-04 10:08:21,194 INFO L175 Difference]: Start difference. First operand has 236 places, 156 transitions, 1641 flow. Second operand 10 states and 552 transitions. [2025-03-04 10:08:21,194 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 243 places, 224 transitions, 2444 flow [2025-03-04 10:08:21,682 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 224 transitions, 2386 flow, removed 6 selfloop flow, removed 8 redundant places. [2025-03-04 10:08:21,684 INFO L231 Difference]: Finished difference. Result has 238 places, 158 transitions, 1694 flow [2025-03-04 10:08:21,684 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1593, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=132, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1694, PETRI_PLACES=238, PETRI_TRANSITIONS=158} [2025-03-04 10:08:21,685 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 160 predicate places. [2025-03-04 10:08:21,685 INFO L471 AbstractCegarLoop]: Abstraction has has 238 places, 158 transitions, 1694 flow [2025-03-04 10:08:21,685 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:21,685 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:08:21,685 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:08:21,685 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2025-03-04 10:08:21,685 INFO L396 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:08:21,685 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:08:21,685 INFO L85 PathProgramCache]: Analyzing trace with hash 816664944, now seen corresponding path program 14 times [2025-03-04 10:08:21,686 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:08:21,686 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [975908620] [2025-03-04 10:08:21,686 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:08:21,686 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:08:21,692 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-04 10:08:21,694 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-03-04 10:08:21,694 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-04 10:08:21,694 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:08:21,883 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:08:21,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:08:21,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [975908620] [2025-03-04 10:08:21,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [975908620] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:08:21,883 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:08:21,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-04 10:08:21,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2072500731] [2025-03-04 10:08:21,883 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:08:21,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:08:21,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:08:21,884 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:08:21,884 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:08:22,026 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:08:22,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 238 places, 158 transitions, 1694 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:22,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:08:22,027 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:08:22,027 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:08:24,422 INFO L124 PetriNetUnfolderBase]: 7183/16563 cut-off events. [2025-03-04 10:08:24,422 INFO L125 PetriNetUnfolderBase]: For 65896/66423 co-relation queries the response was YES. [2025-03-04 10:08:24,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57226 conditions, 16563 events. 7183/16563 cut-off events. For 65896/66423 co-relation queries the response was YES. Maximal size of possible extension queue 954. Compared 173019 event pairs, 1188 based on Foata normal form. 533/16877 useless extension candidates. Maximal degree in co-relation 56317. Up to 8955 conditions per place. [2025-03-04 10:08:24,548 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 179 selfloop transitions, 23 changer transitions 9/224 dead transitions. [2025-03-04 10:08:24,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 224 transitions, 2439 flow [2025-03-04 10:08:24,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:08:24,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:08:24,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 552 transitions. [2025-03-04 10:08:24,550 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6731707317073171 [2025-03-04 10:08:24,550 INFO L175 Difference]: Start difference. First operand has 238 places, 158 transitions, 1694 flow. Second operand 10 states and 552 transitions. [2025-03-04 10:08:24,550 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 224 transitions, 2439 flow [2025-03-04 10:08:25,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 238 places, 224 transitions, 2375 flow, removed 8 selfloop flow, removed 7 redundant places. [2025-03-04 10:08:25,149 INFO L231 Difference]: Finished difference. Result has 240 places, 156 transitions, 1651 flow [2025-03-04 10:08:25,149 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1632, PETRI_DIFFERENCE_MINUEND_PLACES=229, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1651, PETRI_PLACES=240, PETRI_TRANSITIONS=156} [2025-03-04 10:08:25,150 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 162 predicate places. [2025-03-04 10:08:25,150 INFO L471 AbstractCegarLoop]: Abstraction has has 240 places, 156 transitions, 1651 flow [2025-03-04 10:08:25,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:25,150 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:08:25,151 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:08:25,151 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2025-03-04 10:08:25,151 INFO L396 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:08:25,151 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:08:25,151 INFO L85 PathProgramCache]: Analyzing trace with hash 1243280790, now seen corresponding path program 15 times [2025-03-04 10:08:25,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:08:25,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968261458] [2025-03-04 10:08:25,151 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-03-04 10:08:25,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:08:25,161 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 37 statements into 4 equivalence classes. [2025-03-04 10:08:25,165 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-03-04 10:08:25,165 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2025-03-04 10:08:25,165 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:08:25,378 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:08:25,378 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:08:25,378 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968261458] [2025-03-04 10:08:25,378 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1968261458] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:08:25,378 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:08:25,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-04 10:08:25,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586048635] [2025-03-04 10:08:25,378 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:08:25,379 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:08:25,379 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:08:25,379 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:08:25,379 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:08:25,542 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:08:25,543 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 240 places, 156 transitions, 1651 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:25,543 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:08:25,543 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:08:25,543 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:08:27,947 INFO L124 PetriNetUnfolderBase]: 7159/16473 cut-off events. [2025-03-04 10:08:27,947 INFO L125 PetriNetUnfolderBase]: For 65712/66227 co-relation queries the response was YES. [2025-03-04 10:08:28,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56831 conditions, 16473 events. 7159/16473 cut-off events. For 65712/66227 co-relation queries the response was YES. Maximal size of possible extension queue 948. Compared 171582 event pairs, 1194 based on Foata normal form. 521/16763 useless extension candidates. Maximal degree in co-relation 55945. Up to 8955 conditions per place. [2025-03-04 10:08:28,052 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 182 selfloop transitions, 21 changer transitions 9/225 dead transitions. [2025-03-04 10:08:28,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 245 places, 225 transitions, 2422 flow [2025-03-04 10:08:28,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:08:28,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:08:28,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 553 transitions. [2025-03-04 10:08:28,054 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6743902439024391 [2025-03-04 10:08:28,054 INFO L175 Difference]: Start difference. First operand has 240 places, 156 transitions, 1651 flow. Second operand 10 states and 553 transitions. [2025-03-04 10:08:28,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 245 places, 225 transitions, 2422 flow [2025-03-04 10:08:28,569 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 236 places, 225 transitions, 2364 flow, removed 6 selfloop flow, removed 9 redundant places. [2025-03-04 10:08:28,571 INFO L231 Difference]: Finished difference. Result has 237 places, 154 transitions, 1603 flow [2025-03-04 10:08:28,571 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1599, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=135, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1603, PETRI_PLACES=237, PETRI_TRANSITIONS=154} [2025-03-04 10:08:28,572 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 159 predicate places. [2025-03-04 10:08:28,572 INFO L471 AbstractCegarLoop]: Abstraction has has 237 places, 154 transitions, 1603 flow [2025-03-04 10:08:28,572 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:28,572 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:08:28,572 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:08:28,572 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2025-03-04 10:08:28,572 INFO L396 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:08:28,573 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:08:28,573 INFO L85 PathProgramCache]: Analyzing trace with hash -63356690, now seen corresponding path program 16 times [2025-03-04 10:08:28,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:08:28,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2117306126] [2025-03-04 10:08:28,573 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-03-04 10:08:28,573 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:08:28,580 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 37 statements into 2 equivalence classes. [2025-03-04 10:08:28,583 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-03-04 10:08:28,583 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 1 check-sat command(s) [2025-03-04 10:08:28,583 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:08:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:08:28,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:08:28,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2117306126] [2025-03-04 10:08:28,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2117306126] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:08:28,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:08:28,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-04 10:08:28,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129615859] [2025-03-04 10:08:28,753 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:08:28,754 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:08:28,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:08:28,754 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:08:28,754 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:08:28,947 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:08:28,947 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 154 transitions, 1603 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:28,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:08:28,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:08:28,947 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:08:31,246 INFO L124 PetriNetUnfolderBase]: 7129/16449 cut-off events. [2025-03-04 10:08:31,246 INFO L125 PetriNetUnfolderBase]: For 63738/64239 co-relation queries the response was YES. [2025-03-04 10:08:31,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56259 conditions, 16449 events. 7129/16449 cut-off events. For 63738/64239 co-relation queries the response was YES. Maximal size of possible extension queue 943. Compared 171665 event pairs, 1249 based on Foata normal form. 507/16693 useless extension candidates. Maximal degree in co-relation 55375. Up to 8955 conditions per place. [2025-03-04 10:08:31,359 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 177 selfloop transitions, 22 changer transitions 6/218 dead transitions. [2025-03-04 10:08:31,359 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 218 transitions, 2362 flow [2025-03-04 10:08:31,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:08:31,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:08:31,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 552 transitions. [2025-03-04 10:08:31,361 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6731707317073171 [2025-03-04 10:08:31,361 INFO L175 Difference]: Start difference. First operand has 237 places, 154 transitions, 1603 flow. Second operand 10 states and 552 transitions. [2025-03-04 10:08:31,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 218 transitions, 2362 flow [2025-03-04 10:08:31,901 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 218 transitions, 2308 flow, removed 4 selfloop flow, removed 8 redundant places. [2025-03-04 10:08:31,903 INFO L231 Difference]: Finished difference. Result has 237 places, 156 transitions, 1645 flow [2025-03-04 10:08:31,903 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1555, PETRI_DIFFERENCE_MINUEND_PLACES=225, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=133, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1645, PETRI_PLACES=237, PETRI_TRANSITIONS=156} [2025-03-04 10:08:31,904 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 159 predicate places. [2025-03-04 10:08:31,904 INFO L471 AbstractCegarLoop]: Abstraction has has 237 places, 156 transitions, 1645 flow [2025-03-04 10:08:31,904 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:31,904 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:08:31,905 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:08:31,905 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2025-03-04 10:08:31,905 INFO L396 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:08:31,905 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:08:31,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1220002018, now seen corresponding path program 17 times [2025-03-04 10:08:31,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:08:31,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250655832] [2025-03-04 10:08:31,906 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-03-04 10:08:31,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:08:31,914 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 37 statements into 4 equivalence classes. [2025-03-04 10:08:31,929 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) and asserted 37 of 37 statements. [2025-03-04 10:08:31,929 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2025-03-04 10:08:31,929 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:08:32,340 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:08:32,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:08:32,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250655832] [2025-03-04 10:08:32,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250655832] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:08:32,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:08:32,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-04 10:08:32,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416971655] [2025-03-04 10:08:32,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:08:32,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:08:32,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:08:32,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:08:32,342 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=71, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:08:32,557 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:08:32,557 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 156 transitions, 1645 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:32,557 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:08:32,557 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:08:32,557 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:08:34,999 INFO L124 PetriNetUnfolderBase]: 7117/16389 cut-off events. [2025-03-04 10:08:34,999 INFO L125 PetriNetUnfolderBase]: For 64960/65461 co-relation queries the response was YES. [2025-03-04 10:08:35,208 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56089 conditions, 16389 events. 7117/16389 cut-off events. For 64960/65461 co-relation queries the response was YES. Maximal size of possible extension queue 939. Compared 170741 event pairs, 1243 based on Foata normal form. 507/16633 useless extension candidates. Maximal degree in co-relation 55228. Up to 8955 conditions per place. [2025-03-04 10:08:35,261 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 176 selfloop transitions, 20 changer transitions 9/218 dead transitions. [2025-03-04 10:08:35,261 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 218 transitions, 2358 flow [2025-03-04 10:08:35,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:08:35,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:08:35,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 552 transitions. [2025-03-04 10:08:35,262 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6731707317073171 [2025-03-04 10:08:35,262 INFO L175 Difference]: Start difference. First operand has 237 places, 156 transitions, 1645 flow. Second operand 10 states and 552 transitions. [2025-03-04 10:08:35,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 218 transitions, 2358 flow [2025-03-04 10:08:35,921 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 237 places, 218 transitions, 2300 flow, removed 8 selfloop flow, removed 7 redundant places. [2025-03-04 10:08:35,924 INFO L231 Difference]: Finished difference. Result has 239 places, 154 transitions, 1605 flow [2025-03-04 10:08:35,924 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1589, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=136, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1605, PETRI_PLACES=239, PETRI_TRANSITIONS=154} [2025-03-04 10:08:35,924 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 161 predicate places. [2025-03-04 10:08:35,924 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 154 transitions, 1605 flow [2025-03-04 10:08:35,924 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:35,924 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:08:35,925 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:08:35,925 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2025-03-04 10:08:35,925 INFO L396 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:08:35,925 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:08:35,925 INFO L85 PathProgramCache]: Analyzing trace with hash -1016333596, now seen corresponding path program 18 times [2025-03-04 10:08:35,925 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:08:35,925 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1055033318] [2025-03-04 10:08:35,925 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-03-04 10:08:35,926 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:08:35,934 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 37 statements into 4 equivalence classes. [2025-03-04 10:08:35,937 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-03-04 10:08:35,938 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 1 check-sat command(s) [2025-03-04 10:08:35,938 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:08:36,202 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:08:36,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:08:36,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1055033318] [2025-03-04 10:08:36,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1055033318] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:08:36,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:08:36,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-04 10:08:36,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752805594] [2025-03-04 10:08:36,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:08:36,202 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:08:36,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:08:36,203 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:08:36,203 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:08:36,482 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:08:36,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 154 transitions, 1605 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:36,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:08:36,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:08:36,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:08:38,390 INFO L124 PetriNetUnfolderBase]: 7106/16362 cut-off events. [2025-03-04 10:08:38,390 INFO L125 PetriNetUnfolderBase]: For 65286/65804 co-relation queries the response was YES. [2025-03-04 10:08:38,568 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55924 conditions, 16362 events. 7106/16362 cut-off events. For 65286/65804 co-relation queries the response was YES. Maximal size of possible extension queue 931. Compared 170050 event pairs, 1625 based on Foata normal form. 524/16620 useless extension candidates. Maximal degree in co-relation 55062. Up to 10262 conditions per place. [2025-03-04 10:08:38,622 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 181 selfloop transitions, 24 changer transitions 7/225 dead transitions. [2025-03-04 10:08:38,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 244 places, 225 transitions, 2499 flow [2025-03-04 10:08:38,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:08:38,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:08:38,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 551 transitions. [2025-03-04 10:08:38,623 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6719512195121952 [2025-03-04 10:08:38,623 INFO L175 Difference]: Start difference. First operand has 239 places, 154 transitions, 1605 flow. Second operand 10 states and 551 transitions. [2025-03-04 10:08:38,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 244 places, 225 transitions, 2499 flow [2025-03-04 10:08:39,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 225 transitions, 2439 flow, removed 10 selfloop flow, removed 9 redundant places. [2025-03-04 10:08:39,214 INFO L231 Difference]: Finished difference. Result has 239 places, 156 transitions, 1644 flow [2025-03-04 10:08:39,214 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1559, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=154, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1644, PETRI_PLACES=239, PETRI_TRANSITIONS=156} [2025-03-04 10:08:39,215 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 161 predicate places. [2025-03-04 10:08:39,215 INFO L471 AbstractCegarLoop]: Abstraction has has 239 places, 156 transitions, 1644 flow [2025-03-04 10:08:39,215 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:39,215 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:08:39,215 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:08:39,215 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2025-03-04 10:08:39,215 INFO L396 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:08:39,216 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:08:39,216 INFO L85 PathProgramCache]: Analyzing trace with hash -1312221578, now seen corresponding path program 19 times [2025-03-04 10:08:39,216 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:08:39,216 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573858583] [2025-03-04 10:08:39,216 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-03-04 10:08:39,216 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:08:39,224 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 37 statements into 1 equivalence classes. [2025-03-04 10:08:39,235 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 37 of 37 statements. [2025-03-04 10:08:39,235 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-03-04 10:08:39,235 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:08:39,672 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:08:39,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:08:39,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573858583] [2025-03-04 10:08:39,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1573858583] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:08:39,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:08:39,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-04 10:08:39,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792590867] [2025-03-04 10:08:39,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:08:39,672 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:08:39,672 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:08:39,672 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:08:39,672 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:08:39,953 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:08:39,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 239 places, 156 transitions, 1644 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:39,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:08:39,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:08:39,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:08:41,939 INFO L124 PetriNetUnfolderBase]: 7112/16494 cut-off events. [2025-03-04 10:08:41,939 INFO L125 PetriNetUnfolderBase]: For 68222/68698 co-relation queries the response was YES. [2025-03-04 10:08:42,161 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56777 conditions, 16494 events. 7112/16494 cut-off events. For 68222/68698 co-relation queries the response was YES. Maximal size of possible extension queue 940. Compared 172760 event pairs, 1355 based on Foata normal form. 482/16734 useless extension candidates. Maximal degree in co-relation 55914. Up to 10532 conditions per place. [2025-03-04 10:08:42,210 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 171 selfloop transitions, 26 changer transitions 6/216 dead transitions. [2025-03-04 10:08:42,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 246 places, 216 transitions, 2433 flow [2025-03-04 10:08:42,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:08:42,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:08:42,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 544 transitions. [2025-03-04 10:08:42,211 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6634146341463415 [2025-03-04 10:08:42,211 INFO L175 Difference]: Start difference. First operand has 239 places, 156 transitions, 1644 flow. Second operand 10 states and 544 transitions. [2025-03-04 10:08:42,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 246 places, 216 transitions, 2433 flow [2025-03-04 10:08:42,781 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 239 places, 216 transitions, 2372 flow, removed 7 selfloop flow, removed 7 redundant places. [2025-03-04 10:08:42,783 INFO L231 Difference]: Finished difference. Result has 242 places, 158 transitions, 1686 flow [2025-03-04 10:08:42,783 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=82, PETRI_DIFFERENCE_MINUEND_FLOW=1587, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=156, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=24, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=131, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=1686, PETRI_PLACES=242, PETRI_TRANSITIONS=158} [2025-03-04 10:08:42,783 INFO L279 CegarLoopForPetriNet]: 78 programPoint places, 164 predicate places. [2025-03-04 10:08:42,783 INFO L471 AbstractCegarLoop]: Abstraction has has 242 places, 158 transitions, 1686 flow [2025-03-04 10:08:42,784 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:42,784 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-03-04 10:08:42,784 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-03-04 10:08:42,784 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2025-03-04 10:08:42,784 INFO L396 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err10REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err11REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 57 more)] === [2025-03-04 10:08:42,784 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2025-03-04 10:08:42,784 INFO L85 PathProgramCache]: Analyzing trace with hash -1969113128, now seen corresponding path program 20 times [2025-03-04 10:08:42,784 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-03-04 10:08:42,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653648198] [2025-03-04 10:08:42,784 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-03-04 10:08:42,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-03-04 10:08:42,790 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-03-04 10:08:42,792 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 25 of 37 statements. [2025-03-04 10:08:42,792 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-03-04 10:08:42,792 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-03-04 10:08:42,997 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 23 trivial. 0 not checked. [2025-03-04 10:08:42,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-03-04 10:08:42,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653648198] [2025-03-04 10:08:42,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653648198] provided 1 perfect and 0 imperfect interpolant sequences [2025-03-04 10:08:42,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-03-04 10:08:42,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [] total 10 [2025-03-04 10:08:42,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189268866] [2025-03-04 10:08:42,997 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-03-04 10:08:42,997 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-03-04 10:08:42,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-03-04 10:08:42,998 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-03-04 10:08:42,998 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=72, Unknown=0, NotChecked=0, Total=90 [2025-03-04 10:08:43,293 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 46 out of 82 [2025-03-04 10:08:43,293 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 158 transitions, 1686 flow. Second operand has 10 states, 10 states have (on average 49.2) internal successors, (492), 10 states have internal predecessors, (492), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-03-04 10:08:43,293 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-03-04 10:08:43,293 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 46 of 82 [2025-03-04 10:08:43,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-03-04 10:08:45,727 INFO L124 PetriNetUnfolderBase]: 7064/16254 cut-off events. [2025-03-04 10:08:45,727 INFO L125 PetriNetUnfolderBase]: For 70525/71037 co-relation queries the response was YES. [2025-03-04 10:08:45,821 INFO L83 FinitePrefix]: Finished finitePrefix Result has 56460 conditions, 16254 events. 7064/16254 cut-off events. For 70525/71037 co-relation queries the response was YES. Maximal size of possible extension queue 925. Compared 168499 event pairs, 1781 based on Foata normal form. 518/16494 useless extension candidates. Maximal degree in co-relation 55620. Up to 10466 conditions per place. [2025-03-04 10:08:45,861 INFO L140 encePairwiseOnDemand]: 73/82 looper letters, 170 selfloop transitions, 24 changer transitions 9/216 dead transitions. [2025-03-04 10:08:45,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 249 places, 216 transitions, 2431 flow [2025-03-04 10:08:45,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-03-04 10:08:45,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-03-04 10:08:45,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 544 transitions. [2025-03-04 10:08:45,862 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6634146341463415 [2025-03-04 10:08:45,862 INFO L175 Difference]: Start difference. First operand has 242 places, 158 transitions, 1686 flow. Second operand 10 states and 544 transitions. [2025-03-04 10:08:45,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 249 places, 216 transitions, 2431 flow