./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/valid-memsafety.prp --file ../../../trunk/examples/svcomp/pthread/bigshot_s2.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version da043454 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 ../../../trunk/examples/svcomp/pthread/bigshot_s2.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 b1c9926ef1a542691da0bbc2caae83d3d245c7fc81e06ca7a92bd57a51ff68c4 --- Real Ultimate output --- This is Ultimate 0.3.0-wip.fs.system-includes-da04345-m [2025-04-29 11:26:09,226 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-29 11:26:09,280 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2025-04-29 11:26:09,283 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-29 11:26:09,287 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-29 11:26:09,309 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-29 11:26:09,310 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-29 11:26:09,310 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-29 11:26:09,311 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-29 11:26:09,311 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-29 11:26:09,312 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-29 11:26:09,312 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-29 11:26:09,312 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-29 11:26:09,312 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-29 11:26:09,312 INFO L153 SettingsManager]: * Use SBE=true [2025-04-29 11:26:09,313 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-29 11:26:09,313 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-29 11:26:09,313 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-29 11:26:09,313 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-29 11:26:09,313 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-29 11:26:09,313 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-04-29 11:26:09,313 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-04-29 11:26:09,313 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-04-29 11:26:09,313 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-29 11:26:09,313 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-04-29 11:26:09,313 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-04-29 11:26:09,314 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-29 11:26:09,314 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-29 11:26:09,314 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-29 11:26:09,314 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-29 11:26:09,314 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-29 11:26:09,314 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-29 11:26:09,314 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-29 11:26:09,314 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 11:26:09,315 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-29 11:26:09,315 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-29 11:26:09,315 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-29 11:26:09,315 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-29 11:26:09,315 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 11:26:09,315 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-29 11:26:09,315 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-29 11:26:09,315 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2025-04-29 11:26:09,315 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2025-04-29 11:26:09,315 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-29 11:26:09,315 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-29 11:26:09,315 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-29 11:26:09,316 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 -> b1c9926ef1a542691da0bbc2caae83d3d245c7fc81e06ca7a92bd57a51ff68c4 [2025-04-29 11:26:09,535 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-29 11:26:09,541 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-29 11:26:09,542 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-29 11:26:09,543 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-29 11:26:09,543 INFO L274 PluginConnector]: CDTParser initialized [2025-04-29 11:26:09,545 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/bigshot_s2.c [2025-04-29 11:26:10,810 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c99d40d2/084d00a58e244aac98b8e16a319fdfe8/FLAG7ddfd9eee [2025-04-29 11:26:10,982 INFO L389 CDTParser]: Found 1 translation units. [2025-04-29 11:26:10,982 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s2.c [2025-04-29 11:26:10,983 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:26:10,983 WARN L117 ultiparseSymbolTable]: System include stdlib.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:26:10,983 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:26:10,983 WARN L117 ultiparseSymbolTable]: System include string.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:26:10,988 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c99d40d2/084d00a58e244aac98b8e16a319fdfe8/FLAG7ddfd9eee [2025-04-29 11:26:11,861 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/4c99d40d2/084d00a58e244aac98b8e16a319fdfe8 [2025-04-29 11:26:11,863 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-29 11:26:11,864 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-29 11:26:11,865 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-29 11:26:11,867 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-29 11:26:11,870 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-29 11:26:11,870 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.04 11:26:11" (1/1) ... [2025-04-29 11:26:11,871 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@66264815 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:11, skipping insertion in model container [2025-04-29 11:26:11,871 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.04 11:26:11" (1/1) ... [2025-04-29 11:26:11,880 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-29 11:26:12,044 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-29 11:26:12,060 INFO L200 MainTranslator]: Completed pre-run [2025-04-29 11:26:12,092 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-29 11:26:12,111 INFO L204 MainTranslator]: Completed translation [2025-04-29 11:26:12,111 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:12 WrapperNode [2025-04-29 11:26:12,112 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-29 11:26:12,112 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-29 11:26:12,112 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-29 11:26:12,112 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-29 11:26:12,116 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:12" (1/1) ... [2025-04-29 11:26:12,121 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:12" (1/1) ... [2025-04-29 11:26:12,134 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 58 [2025-04-29 11:26:12,135 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-29 11:26:12,136 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-29 11:26:12,137 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-29 11:26:12,137 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-29 11:26:12,141 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:12" (1/1) ... [2025-04-29 11:26:12,142 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:12" (1/1) ... [2025-04-29 11:26:12,144 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:12" (1/1) ... [2025-04-29 11:26:12,157 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [9, 2]. 82 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [8, 0]. The 1 writes are split as follows [0, 1]. [2025-04-29 11:26:12,157 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:12" (1/1) ... [2025-04-29 11:26:12,157 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:12" (1/1) ... [2025-04-29 11:26:12,160 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:12" (1/1) ... [2025-04-29 11:26:12,162 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:12" (1/1) ... [2025-04-29 11:26:12,164 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:12" (1/1) ... [2025-04-29 11:26:12,165 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:12" (1/1) ... [2025-04-29 11:26:12,165 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:12" (1/1) ... [2025-04-29 11:26:12,168 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-29 11:26:12,168 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-29 11:26:12,168 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-29 11:26:12,169 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-29 11:26:12,169 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:12" (1/1) ... [2025-04-29 11:26:12,172 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 11:26:12,185 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:12,196 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) [2025-04-29 11:26:12,201 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 [2025-04-29 11:26:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-29 11:26:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-29 11:26:12,214 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-29 11:26:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-29 11:26:12,214 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-29 11:26:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2025-04-29 11:26:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2025-04-29 11:26:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#0 [2025-04-29 11:26:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~int#1 [2025-04-29 11:26:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-29 11:26:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-29 11:26:12,214 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-29 11:26:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2025-04-29 11:26:12,214 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2025-04-29 11:26:12,215 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-29 11:26:12,288 INFO L234 CfgBuilder]: Building ICFG [2025-04-29 11:26:12,289 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-29 11:26:12,397 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-29 11:26:12,397 INFO L283 CfgBuilder]: Performing block encoding [2025-04-29 11:26:12,476 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-29 11:26:12,476 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2025-04-29 11:26:12,476 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 11:26:12 BoogieIcfgContainer [2025-04-29 11:26:12,477 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-29 11:26:12,478 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-29 11:26:12,479 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-29 11:26:12,482 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-29 11:26:12,482 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.04 11:26:11" (1/3) ... [2025-04-29 11:26:12,482 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31fdd8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 11:26:12, skipping insertion in model container [2025-04-29 11:26:12,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:12" (2/3) ... [2025-04-29 11:26:12,483 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31fdd8a7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 11:26:12, skipping insertion in model container [2025-04-29 11:26:12,483 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 11:26:12" (3/3) ... [2025-04-29 11:26:12,484 INFO L128 eAbstractionObserver]: Analyzing ICFG bigshot_s2.c [2025-04-29 11:26:12,493 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-29 11:26:12,494 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG bigshot_s2.c that has 3 procedures, 33 locations, 33 edges, 1 initial locations, 1 loop locations, and 9 error locations. [2025-04-29 11:26:12,495 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-29 11:26:12,537 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-29 11:26:12,558 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 35 transitions, 84 flow [2025-04-29 11:26:12,577 INFO L116 PetriNetUnfolderBase]: 3/33 cut-off events. [2025-04-29 11:26:12,580 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-29 11:26:12,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 3/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 52 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2025-04-29 11:26:12,582 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 35 transitions, 84 flow [2025-04-29 11:26:12,585 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 32 transitions, 76 flow [2025-04-29 11:26:12,593 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-29 11:26:12,603 INFO L340 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;@f307f59, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-29 11:26:12,604 INFO L341 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2025-04-29 11:26:12,609 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-29 11:26:12,609 INFO L116 PetriNetUnfolderBase]: 1/14 cut-off events. [2025-04-29 11:26:12,609 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-29 11:26:12,609 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:12,610 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:12,610 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:12,613 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:12,613 INFO L85 PathProgramCache]: Analyzing trace with hash 1883108612, now seen corresponding path program 1 times [2025-04-29 11:26:12,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:26:12,620 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [42811375] [2025-04-29 11:26:12,620 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:12,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:26:12,663 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-29 11:26:12,676 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-29 11:26:12,676 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:12,677 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:12,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:12,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:26:12,835 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [42811375] [2025-04-29 11:26:12,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [42811375] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:26:12,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:26:12,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 11:26:12,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1359550227] [2025-04-29 11:26:12,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:26:12,842 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-29 11:26:12,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:26:12,858 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-29 11:26:12,859 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2025-04-29 11:26:12,910 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 35 [2025-04-29 11:26:12,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:12,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:12,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 35 [2025-04-29 11:26:12,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:12,969 INFO L116 PetriNetUnfolderBase]: 10/51 cut-off events. [2025-04-29 11:26:12,970 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-29 11:26:12,970 INFO L83 FinitePrefix]: Finished finitePrefix Result has 93 conditions, 51 events. 10/51 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 118 event pairs, 3 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 72. Up to 21 conditions per place. [2025-04-29 11:26:12,971 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 16 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2025-04-29 11:26:12,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 110 flow [2025-04-29 11:26:12,972 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-29 11:26:12,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-29 11:26:12,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 74 transitions. [2025-04-29 11:26:12,981 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5285714285714286 [2025-04-29 11:26:12,982 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 4 states and 74 transitions. [2025-04-29 11:26:12,982 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 110 flow [2025-04-29 11:26:12,984 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 102 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-29 11:26:12,986 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 68 flow [2025-04-29 11:26:12,987 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2025-04-29 11:26:12,989 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2025-04-29 11:26:12,989 INFO L485 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 68 flow [2025-04-29 11:26:12,989 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.8) internal successors, (74), 5 states have internal predecessors, (74), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:12,989 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:12,989 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:12,989 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2025-04-29 11:26:12,990 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:12,990 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:12,990 INFO L85 PathProgramCache]: Analyzing trace with hash -1753174939, now seen corresponding path program 1 times [2025-04-29 11:26:12,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:26:12,990 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [197904774] [2025-04-29 11:26:12,990 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:12,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:26:12,996 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-29 11:26:13,004 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-29 11:26:13,005 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:13,005 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:13,143 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:13,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:26:13,143 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [197904774] [2025-04-29 11:26:13,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [197904774] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:26:13,144 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:26:13,144 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-29 11:26:13,144 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [102924983] [2025-04-29 11:26:13,144 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:26:13,145 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-29 11:26:13,145 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:26:13,145 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-29 11:26:13,145 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-29 11:26:13,167 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 35 [2025-04-29 11:26:13,167 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 68 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:13,167 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:13,167 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 35 [2025-04-29 11:26:13,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:13,224 INFO L116 PetriNetUnfolderBase]: 14/66 cut-off events. [2025-04-29 11:26:13,224 INFO L117 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-04-29 11:26:13,224 INFO L83 FinitePrefix]: Finished finitePrefix Result has 118 conditions, 66 events. 14/66 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 134 event pairs, 6 based on Foata normal form. 2/55 useless extension candidates. Maximal degree in co-relation 46. Up to 34 conditions per place. [2025-04-29 11:26:13,224 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 17 selfloop transitions, 4 changer transitions 0/33 dead transitions. [2025-04-29 11:26:13,225 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 33 transitions, 120 flow [2025-04-29 11:26:13,225 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-29 11:26:13,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-29 11:26:13,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2025-04-29 11:26:13,226 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2025-04-29 11:26:13,226 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 68 flow. Second operand 4 states and 87 transitions. [2025-04-29 11:26:13,226 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 33 transitions, 120 flow [2025-04-29 11:26:13,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 33 transitions, 112 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-29 11:26:13,227 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 85 flow [2025-04-29 11:26:13,227 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=85, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2025-04-29 11:26:13,228 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2025-04-29 11:26:13,228 INFO L485 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 85 flow [2025-04-29 11:26:13,228 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:13,228 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:13,228 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:13,228 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2025-04-29 11:26:13,229 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:13,229 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:13,229 INFO L85 PathProgramCache]: Analyzing trace with hash 1486151974, now seen corresponding path program 1 times [2025-04-29 11:26:13,229 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:26:13,229 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311156660] [2025-04-29 11:26:13,229 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:13,229 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:26:13,236 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-29 11:26:13,238 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-29 11:26:13,238 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:13,238 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:13,268 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:13,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:26:13,268 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311156660] [2025-04-29 11:26:13,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [311156660] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:26:13,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:26:13,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 11:26:13,268 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [227515816] [2025-04-29 11:26:13,268 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:26:13,269 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-29 11:26:13,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:26:13,269 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-29 11:26:13,269 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-29 11:26:13,297 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 35 [2025-04-29 11:26:13,297 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:13,297 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:13,297 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 35 [2025-04-29 11:26:13,297 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:13,336 INFO L116 PetriNetUnfolderBase]: 14/68 cut-off events. [2025-04-29 11:26:13,336 INFO L117 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-04-29 11:26:13,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 68 events. 14/68 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 129 event pairs, 1 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 45. Up to 20 conditions per place. [2025-04-29 11:26:13,337 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 16 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2025-04-29 11:26:13,337 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 31 transitions, 125 flow [2025-04-29 11:26:13,338 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-29 11:26:13,338 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-29 11:26:13,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2025-04-29 11:26:13,338 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-04-29 11:26:13,338 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 85 flow. Second operand 4 states and 80 transitions. [2025-04-29 11:26:13,338 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 31 transitions, 125 flow [2025-04-29 11:26:13,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 120 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-29 11:26:13,341 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 84 flow [2025-04-29 11:26:13,341 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2025-04-29 11:26:13,342 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2025-04-29 11:26:13,342 INFO L485 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 84 flow [2025-04-29 11:26:13,342 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:13,342 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:13,342 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:13,342 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2025-04-29 11:26:13,342 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:13,342 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:13,342 INFO L85 PathProgramCache]: Analyzing trace with hash -1174968251, now seen corresponding path program 1 times [2025-04-29 11:26:13,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:26:13,343 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1383872267] [2025-04-29 11:26:13,343 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:13,343 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:26:13,347 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-04-29 11:26:13,350 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-04-29 11:26:13,350 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:13,350 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:13,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:13,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:26:13,370 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1383872267] [2025-04-29 11:26:13,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1383872267] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:26:13,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:26:13,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 11:26:13,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776515762] [2025-04-29 11:26:13,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:26:13,370 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-29 11:26:13,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:26:13,370 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-29 11:26:13,370 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-29 11:26:13,375 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 35 [2025-04-29 11:26:13,375 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:13,375 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:13,375 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 35 [2025-04-29 11:26:13,375 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:13,402 INFO L116 PetriNetUnfolderBase]: 11/59 cut-off events. [2025-04-29 11:26:13,403 INFO L117 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-04-29 11:26:13,403 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 59 events. 11/59 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 123 event pairs, 6 based on Foata normal form. 2/56 useless extension candidates. Maximal degree in co-relation 54. Up to 31 conditions per place. [2025-04-29 11:26:13,403 INFO L140 encePairwiseOnDemand]: 33/35 looper letters, 17 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2025-04-29 11:26:13,403 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 120 flow [2025-04-29 11:26:13,404 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-29 11:26:13,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-29 11:26:13,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2025-04-29 11:26:13,405 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2025-04-29 11:26:13,406 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 84 flow. Second operand 3 states and 68 transitions. [2025-04-29 11:26:13,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 120 flow [2025-04-29 11:26:13,406 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-29 11:26:13,407 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 76 flow [2025-04-29 11:26:13,407 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2025-04-29 11:26:13,408 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2025-04-29 11:26:13,408 INFO L485 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 76 flow [2025-04-29 11:26:13,409 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:13,409 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:13,409 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:13,409 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2025-04-29 11:26:13,409 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:13,410 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:13,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1173928825, now seen corresponding path program 1 times [2025-04-29 11:26:13,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:26:13,411 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861690550] [2025-04-29 11:26:13,411 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:13,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:26:13,415 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-04-29 11:26:13,421 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-04-29 11:26:13,421 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:13,421 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:13,489 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:13,490 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:26:13,490 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861690550] [2025-04-29 11:26:13,490 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861690550] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:26:13,490 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:26:13,490 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 11:26:13,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032467895] [2025-04-29 11:26:13,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:26:13,490 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-29 11:26:13,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:26:13,491 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-29 11:26:13,491 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-29 11:26:13,519 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 35 [2025-04-29 11:26:13,519 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:13,519 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:13,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 35 [2025-04-29 11:26:13,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:13,576 INFO L116 PetriNetUnfolderBase]: 12/56 cut-off events. [2025-04-29 11:26:13,577 INFO L117 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-04-29 11:26:13,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 56 events. 12/56 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 99 event pairs, 5 based on Foata normal form. 2/55 useless extension candidates. Maximal degree in co-relation 94. Up to 28 conditions per place. [2025-04-29 11:26:13,578 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 17 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2025-04-29 11:26:13,578 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 30 transitions, 122 flow [2025-04-29 11:26:13,578 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-29 11:26:13,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-29 11:26:13,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2025-04-29 11:26:13,580 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2025-04-29 11:26:13,580 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 76 flow. Second operand 4 states and 87 transitions. [2025-04-29 11:26:13,580 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 30 transitions, 122 flow [2025-04-29 11:26:13,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 121 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-29 11:26:13,582 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 86 flow [2025-04-29 11:26:13,582 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2025-04-29 11:26:13,582 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2025-04-29 11:26:13,582 INFO L485 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 86 flow [2025-04-29 11:26:13,582 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:13,582 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:13,582 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:13,583 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2025-04-29 11:26:13,583 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:13,583 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:13,583 INFO L85 PathProgramCache]: Analyzing trace with hash 614755148, now seen corresponding path program 1 times [2025-04-29 11:26:13,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:26:13,583 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824689070] [2025-04-29 11:26:13,583 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:13,583 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:26:13,590 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-29 11:26:13,594 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-29 11:26:13,595 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:13,595 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:13,718 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:13,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:26:13,719 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824689070] [2025-04-29 11:26:13,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824689070] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:26:13,719 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2053386111] [2025-04-29 11:26:13,719 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:13,719 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:13,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:13,722 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) [2025-04-29 11:26:13,724 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-29 11:26:13,758 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-29 11:26:13,774 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-29 11:26:13,774 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:13,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:13,776 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-04-29 11:26:13,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:13,847 INFO L325 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2025-04-29 11:26:13,847 INFO L354 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 14 treesize of output 13 [2025-04-29 11:26:13,868 INFO L325 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-04-29 11:26:13,869 INFO L354 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 [2025-04-29 11:26:13,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:13,997 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:14,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:14,135 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2053386111] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:26:14,135 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 11:26:14,135 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2025-04-29 11:26:14,135 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604687435] [2025-04-29 11:26:14,135 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:14,136 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-29 11:26:14,136 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:26:14,136 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-29 11:26:14,136 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2025-04-29 11:26:14,351 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-04-29 11:26:14,351 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 86 flow. Second operand has 14 states, 14 states have (on average 15.0) internal successors, (210), 14 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) [2025-04-29 11:26:14,352 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:14,352 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-04-29 11:26:14,352 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:14,511 INFO L116 PetriNetUnfolderBase]: 30/115 cut-off events. [2025-04-29 11:26:14,512 INFO L117 PetriNetUnfolderBase]: For 33/33 co-relation queries the response was YES. [2025-04-29 11:26:14,513 INFO L83 FinitePrefix]: Finished finitePrefix Result has 245 conditions, 115 events. 30/115 cut-off events. For 33/33 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 184 event pairs, 6 based on Foata normal form. 12/127 useless extension candidates. Maximal degree in co-relation 223. Up to 33 conditions per place. [2025-04-29 11:26:14,513 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 28 selfloop transitions, 11 changer transitions 0/45 dead transitions. [2025-04-29 11:26:14,514 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 39 places, 45 transitions, 206 flow [2025-04-29 11:26:14,514 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-29 11:26:14,514 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-29 11:26:14,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 129 transitions. [2025-04-29 11:26:14,516 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5265306122448979 [2025-04-29 11:26:14,516 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 86 flow. Second operand 7 states and 129 transitions. [2025-04-29 11:26:14,516 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 39 places, 45 transitions, 206 flow [2025-04-29 11:26:14,517 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 45 transitions, 198 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-29 11:26:14,517 INFO L231 Difference]: Finished difference. Result has 40 places, 31 transitions, 140 flow [2025-04-29 11:26:14,517 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=140, PETRI_PLACES=40, PETRI_TRANSITIONS=31} [2025-04-29 11:26:14,518 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 4 predicate places. [2025-04-29 11:26:14,518 INFO L485 AbstractCegarLoop]: Abstraction has has 40 places, 31 transitions, 140 flow [2025-04-29 11:26:14,518 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.0) internal successors, (210), 14 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) [2025-04-29 11:26:14,518 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:14,518 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:14,524 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-04-29 11:26:14,719 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2025-04-29 11:26:14,719 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:14,719 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:14,720 INFO L85 PathProgramCache]: Analyzing trace with hash -1925782098, now seen corresponding path program 1 times [2025-04-29 11:26:14,720 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:26:14,720 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379633145] [2025-04-29 11:26:14,720 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:14,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:26:14,724 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-29 11:26:14,728 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-29 11:26:14,728 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:14,728 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:14,803 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:14,804 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:26:14,804 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379633145] [2025-04-29 11:26:14,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379633145] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:26:14,804 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1710241462] [2025-04-29 11:26:14,804 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:14,804 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:14,804 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:14,806 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) [2025-04-29 11:26:14,808 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-29 11:26:14,837 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-29 11:26:14,851 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-29 11:26:14,851 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:14,851 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:14,852 INFO L256 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-29 11:26:14,853 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:14,859 INFO L354 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 [2025-04-29 11:26:14,948 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:14,948 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:15,035 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:15,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1710241462] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:26:15,036 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 11:26:15,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2025-04-29 11:26:15,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719738225] [2025-04-29 11:26:15,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:15,036 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2025-04-29 11:26:15,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:26:15,037 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2025-04-29 11:26:15,037 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2025-04-29 11:26:15,144 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 35 [2025-04-29 11:26:15,144 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 31 transitions, 140 flow. Second operand has 11 states, 11 states have (on average 17.727272727272727) internal successors, (195), 11 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:15,144 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:15,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 35 [2025-04-29 11:26:15,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:15,269 INFO L116 PetriNetUnfolderBase]: 25/106 cut-off events. [2025-04-29 11:26:15,270 INFO L117 PetriNetUnfolderBase]: For 99/99 co-relation queries the response was YES. [2025-04-29 11:26:15,270 INFO L83 FinitePrefix]: Finished finitePrefix Result has 258 conditions, 106 events. 25/106 cut-off events. For 99/99 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 151 event pairs, 4 based on Foata normal form. 6/110 useless extension candidates. Maximal degree in co-relation 233. Up to 27 conditions per place. [2025-04-29 11:26:15,271 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 24 selfloop transitions, 11 changer transitions 0/43 dead transitions. [2025-04-29 11:26:15,271 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 43 transitions, 234 flow [2025-04-29 11:26:15,271 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-29 11:26:15,271 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-29 11:26:15,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2025-04-29 11:26:15,272 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5836734693877551 [2025-04-29 11:26:15,272 INFO L175 Difference]: Start difference. First operand has 40 places, 31 transitions, 140 flow. Second operand 7 states and 143 transitions. [2025-04-29 11:26:15,272 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 43 transitions, 234 flow [2025-04-29 11:26:15,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 43 transitions, 218 flow, removed 6 selfloop flow, removed 2 redundant places. [2025-04-29 11:26:15,274 INFO L231 Difference]: Finished difference. Result has 48 places, 32 transitions, 174 flow [2025-04-29 11:26:15,274 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=124, PETRI_DIFFERENCE_MINUEND_PLACES=38, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=174, PETRI_PLACES=48, PETRI_TRANSITIONS=32} [2025-04-29 11:26:15,274 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 12 predicate places. [2025-04-29 11:26:15,274 INFO L485 AbstractCegarLoop]: Abstraction has has 48 places, 32 transitions, 174 flow [2025-04-29 11:26:15,274 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.727272727272727) internal successors, (195), 11 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:15,274 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:15,275 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] [2025-04-29 11:26:15,289 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-04-29 11:26:15,475 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2025-04-29 11:26:15,475 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:15,475 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:15,476 INFO L85 PathProgramCache]: Analyzing trace with hash -430645749, now seen corresponding path program 1 times [2025-04-29 11:26:15,476 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:26:15,476 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1313309469] [2025-04-29 11:26:15,476 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:15,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:26:15,481 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-29 11:26:15,486 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-29 11:26:15,487 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:15,487 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:15,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:15,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:26:15,609 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1313309469] [2025-04-29 11:26:15,611 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1313309469] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:26:15,611 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:26:15,611 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-04-29 11:26:15,611 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772554000] [2025-04-29 11:26:15,611 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:26:15,611 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-29 11:26:15,611 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:26:15,612 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-29 11:26:15,612 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-04-29 11:26:15,652 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 35 [2025-04-29 11:26:15,653 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 32 transitions, 174 flow. Second operand has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:15,653 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:15,653 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 35 [2025-04-29 11:26:15,653 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:15,748 INFO L116 PetriNetUnfolderBase]: 24/114 cut-off events. [2025-04-29 11:26:15,748 INFO L117 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2025-04-29 11:26:15,748 INFO L83 FinitePrefix]: Finished finitePrefix Result has 314 conditions, 114 events. 24/114 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 187 event pairs, 12 based on Foata normal form. 1/115 useless extension candidates. Maximal degree in co-relation 283. Up to 49 conditions per place. [2025-04-29 11:26:15,749 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 21 selfloop transitions, 5 changer transitions 6/42 dead transitions. [2025-04-29 11:26:15,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 42 transitions, 259 flow [2025-04-29 11:26:15,749 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-29 11:26:15,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-29 11:26:15,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 157 transitions. [2025-04-29 11:26:15,750 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5607142857142857 [2025-04-29 11:26:15,750 INFO L175 Difference]: Start difference. First operand has 48 places, 32 transitions, 174 flow. Second operand 8 states and 157 transitions. [2025-04-29 11:26:15,750 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 42 transitions, 259 flow [2025-04-29 11:26:15,751 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 42 transitions, 245 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-04-29 11:26:15,752 INFO L231 Difference]: Finished difference. Result has 52 places, 33 transitions, 173 flow [2025-04-29 11:26:15,752 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=160, PETRI_DIFFERENCE_MINUEND_PLACES=43, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=173, PETRI_PLACES=52, PETRI_TRANSITIONS=33} [2025-04-29 11:26:15,753 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 16 predicate places. [2025-04-29 11:26:15,753 INFO L485 AbstractCegarLoop]: Abstraction has has 52 places, 33 transitions, 173 flow [2025-04-29 11:26:15,753 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 18.142857142857142) internal successors, (127), 7 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:15,753 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:15,753 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:15,753 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2025-04-29 11:26:15,753 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:15,754 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:15,754 INFO L85 PathProgramCache]: Analyzing trace with hash 1558113374, now seen corresponding path program 1 times [2025-04-29 11:26:15,754 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:26:15,754 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640005981] [2025-04-29 11:26:15,754 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:15,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:26:15,759 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-04-29 11:26:15,765 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-04-29 11:26:15,765 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:15,765 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:15,897 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:15,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:26:15,897 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640005981] [2025-04-29 11:26:15,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640005981] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:26:15,897 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804954257] [2025-04-29 11:26:15,898 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:15,898 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:15,898 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:15,899 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) [2025-04-29 11:26:15,901 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-29 11:26:15,932 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-04-29 11:26:15,949 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-04-29 11:26:15,949 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:15,949 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:15,950 INFO L256 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-29 11:26:15,951 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:16,054 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-29 11:26:16,063 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:16,064 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:16,121 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:16,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804954257] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:26:16,122 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 11:26:16,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 13 [2025-04-29 11:26:16,122 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1892419089] [2025-04-29 11:26:16,122 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:16,122 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-29 11:26:16,122 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:26:16,123 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-29 11:26:16,123 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2025-04-29 11:26:16,230 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 35 [2025-04-29 11:26:16,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 33 transitions, 173 flow. Second operand has 14 states, 14 states have (on average 20.071428571428573) internal successors, (281), 14 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:16,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:16,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 35 [2025-04-29 11:26:16,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:16,342 INFO L116 PetriNetUnfolderBase]: 18/99 cut-off events. [2025-04-29 11:26:16,342 INFO L117 PetriNetUnfolderBase]: For 111/111 co-relation queries the response was YES. [2025-04-29 11:26:16,343 INFO L83 FinitePrefix]: Finished finitePrefix Result has 280 conditions, 99 events. 18/99 cut-off events. For 111/111 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 137 event pairs, 9 based on Foata normal form. 2/101 useless extension candidates. Maximal degree in co-relation 261. Up to 38 conditions per place. [2025-04-29 11:26:16,343 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 21 selfloop transitions, 6 changer transitions 0/37 dead transitions. [2025-04-29 11:26:16,343 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 37 transitions, 230 flow [2025-04-29 11:26:16,344 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-29 11:26:16,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-29 11:26:16,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 145 transitions. [2025-04-29 11:26:16,344 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5918367346938775 [2025-04-29 11:26:16,344 INFO L175 Difference]: Start difference. First operand has 52 places, 33 transitions, 173 flow. Second operand 7 states and 145 transitions. [2025-04-29 11:26:16,344 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 37 transitions, 230 flow [2025-04-29 11:26:16,345 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 37 transitions, 225 flow, removed 1 selfloop flow, removed 3 redundant places. [2025-04-29 11:26:16,346 INFO L231 Difference]: Finished difference. Result has 55 places, 33 transitions, 183 flow [2025-04-29 11:26:16,346 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=159, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=183, PETRI_PLACES=55, PETRI_TRANSITIONS=33} [2025-04-29 11:26:16,346 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 19 predicate places. [2025-04-29 11:26:16,346 INFO L485 AbstractCegarLoop]: Abstraction has has 55 places, 33 transitions, 183 flow [2025-04-29 11:26:16,346 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 20.071428571428573) internal successors, (281), 14 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:16,346 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:16,346 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:16,352 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2025-04-29 11:26:16,547 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:16,547 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:16,548 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:16,548 INFO L85 PathProgramCache]: Analyzing trace with hash 537787717, now seen corresponding path program 2 times [2025-04-29 11:26:16,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:26:16,548 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1773185849] [2025-04-29 11:26:16,548 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:26:16,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:26:16,555 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 33 statements into 2 equivalence classes. [2025-04-29 11:26:16,570 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-04-29 11:26:16,570 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 11:26:16,570 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:16,742 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:16,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:26:16,742 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1773185849] [2025-04-29 11:26:16,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1773185849] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:26:16,743 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [785780369] [2025-04-29 11:26:16,743 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:26:16,744 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:16,744 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:16,745 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) [2025-04-29 11:26:16,747 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-29 11:26:16,780 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 33 statements into 2 equivalence classes. [2025-04-29 11:26:16,801 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-04-29 11:26:16,801 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 11:26:16,801 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:16,802 INFO L256 TraceCheckSpWp]: Trace formula consists of 189 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-29 11:26:16,803 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:16,938 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-29 11:26:16,948 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:16,949 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:17,019 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:17,020 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [785780369] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:26:17,020 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 11:26:17,020 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 16 [2025-04-29 11:26:17,020 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830066216] [2025-04-29 11:26:17,020 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:17,021 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2025-04-29 11:26:17,021 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:26:17,021 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2025-04-29 11:26:17,021 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2025-04-29 11:26:17,211 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 35 [2025-04-29 11:26:17,211 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 33 transitions, 183 flow. Second operand has 17 states, 17 states have (on average 19.88235294117647) internal successors, (338), 17 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:17,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:17,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 35 [2025-04-29 11:26:17,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:17,350 INFO L116 PetriNetUnfolderBase]: 15/96 cut-off events. [2025-04-29 11:26:17,350 INFO L117 PetriNetUnfolderBase]: For 152/152 co-relation queries the response was YES. [2025-04-29 11:26:17,351 INFO L83 FinitePrefix]: Finished finitePrefix Result has 285 conditions, 96 events. 15/96 cut-off events. For 152/152 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 135 event pairs, 6 based on Foata normal form. 2/98 useless extension candidates. Maximal degree in co-relation 249. Up to 29 conditions per place. [2025-04-29 11:26:17,351 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 21 selfloop transitions, 7 changer transitions 0/38 dead transitions. [2025-04-29 11:26:17,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 38 transitions, 246 flow [2025-04-29 11:26:17,352 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-29 11:26:17,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-29 11:26:17,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 165 transitions. [2025-04-29 11:26:17,353 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5892857142857143 [2025-04-29 11:26:17,353 INFO L175 Difference]: Start difference. First operand has 55 places, 33 transitions, 183 flow. Second operand 8 states and 165 transitions. [2025-04-29 11:26:17,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 38 transitions, 246 flow [2025-04-29 11:26:17,354 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 38 transitions, 234 flow, removed 1 selfloop flow, removed 5 redundant places. [2025-04-29 11:26:17,355 INFO L231 Difference]: Finished difference. Result has 59 places, 33 transitions, 190 flow [2025-04-29 11:26:17,355 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=162, PETRI_DIFFERENCE_MINUEND_PLACES=50, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=190, PETRI_PLACES=59, PETRI_TRANSITIONS=33} [2025-04-29 11:26:17,355 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 23 predicate places. [2025-04-29 11:26:17,355 INFO L485 AbstractCegarLoop]: Abstraction has has 59 places, 33 transitions, 190 flow [2025-04-29 11:26:17,356 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 19.88235294117647) internal successors, (338), 17 states have internal predecessors, (338), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:17,356 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:17,356 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:17,362 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2025-04-29 11:26:17,560 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:17,560 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:17,560 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:17,561 INFO L85 PathProgramCache]: Analyzing trace with hash -1029623679, now seen corresponding path program 2 times [2025-04-29 11:26:17,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:26:17,561 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1753230636] [2025-04-29 11:26:17,561 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:26:17,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:26:17,568 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-04-29 11:26:17,574 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-04-29 11:26:17,574 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 11:26:17,574 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:17,720 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:17,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:26:17,720 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1753230636] [2025-04-29 11:26:17,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1753230636] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:26:17,720 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584158967] [2025-04-29 11:26:17,720 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:26:17,720 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:17,720 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:17,723 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) [2025-04-29 11:26:17,725 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-29 11:26:17,755 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-04-29 11:26:17,770 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-04-29 11:26:17,770 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 11:26:17,770 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:17,771 INFO L256 TraceCheckSpWp]: Trace formula consists of 187 conjuncts, 23 conjuncts are in the unsatisfiable core [2025-04-29 11:26:17,772 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:17,800 INFO L325 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-04-29 11:26:17,800 INFO L354 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 [2025-04-29 11:26:17,804 INFO L354 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 [2025-04-29 11:26:18,017 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:18,017 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:18,237 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:18,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [584158967] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:26:18,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 11:26:18,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 7, 7] total 20 [2025-04-29 11:26:18,237 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1078422088] [2025-04-29 11:26:18,237 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:18,237 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-29 11:26:18,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:26:18,238 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-29 11:26:18,238 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=364, Unknown=0, NotChecked=0, Total=462 [2025-04-29 11:26:18,627 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-04-29 11:26:18,628 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 33 transitions, 190 flow. Second operand has 22 states, 22 states have (on average 15.545454545454545) internal successors, (342), 22 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:18,628 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:18,628 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-04-29 11:26:18,628 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:18,927 INFO L116 PetriNetUnfolderBase]: 48/185 cut-off events. [2025-04-29 11:26:18,928 INFO L117 PetriNetUnfolderBase]: For 403/403 co-relation queries the response was YES. [2025-04-29 11:26:18,928 INFO L83 FinitePrefix]: Finished finitePrefix Result has 619 conditions, 185 events. 48/185 cut-off events. For 403/403 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 266 event pairs, 6 based on Foata normal form. 8/193 useless extension candidates. Maximal degree in co-relation 581. Up to 38 conditions per place. [2025-04-29 11:26:18,929 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 44 selfloop transitions, 16 changer transitions 0/67 dead transitions. [2025-04-29 11:26:18,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 67 transitions, 470 flow [2025-04-29 11:26:18,929 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-29 11:26:18,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-29 11:26:18,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 196 transitions. [2025-04-29 11:26:18,932 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2025-04-29 11:26:18,932 INFO L175 Difference]: Start difference. First operand has 59 places, 33 transitions, 190 flow. Second operand 11 states and 196 transitions. [2025-04-29 11:26:18,932 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 67 transitions, 470 flow [2025-04-29 11:26:18,935 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 67 transitions, 454 flow, removed 2 selfloop flow, removed 6 redundant places. [2025-04-29 11:26:18,937 INFO L231 Difference]: Finished difference. Result has 68 places, 42 transitions, 315 flow [2025-04-29 11:26:18,937 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=53, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=33, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=315, PETRI_PLACES=68, PETRI_TRANSITIONS=42} [2025-04-29 11:26:18,937 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 32 predicate places. [2025-04-29 11:26:18,938 INFO L485 AbstractCegarLoop]: Abstraction has has 68 places, 42 transitions, 315 flow [2025-04-29 11:26:18,939 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 15.545454545454545) internal successors, (342), 22 states have internal predecessors, (342), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:18,939 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:18,939 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:18,945 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-04-29 11:26:19,139 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2025-04-29 11:26:19,139 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:19,140 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:19,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1625869917, now seen corresponding path program 2 times [2025-04-29 11:26:19,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:26:19,140 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543292594] [2025-04-29 11:26:19,140 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:26:19,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:26:19,144 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-04-29 11:26:19,147 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 13 of 37 statements. [2025-04-29 11:26:19,147 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-29 11:26:19,147 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:19,221 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-04-29 11:26:19,222 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:26:19,222 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543292594] [2025-04-29 11:26:19,222 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543292594] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:26:19,222 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [196086349] [2025-04-29 11:26:19,222 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:26:19,222 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:19,223 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:19,228 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) [2025-04-29 11:26:19,229 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-29 11:26:19,258 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-04-29 11:26:19,267 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 13 of 37 statements. [2025-04-29 11:26:19,267 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-29 11:26:19,267 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:19,268 INFO L256 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 20 conjuncts are in the unsatisfiable core [2025-04-29 11:26:19,269 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:19,289 INFO L325 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-04-29 11:26:19,289 INFO L354 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 [2025-04-29 11:26:19,294 INFO L354 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 [2025-04-29 11:26:19,568 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-04-29 11:26:19,568 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:19,875 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-04-29 11:26:19,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [196086349] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:26:19,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 11:26:19,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2025-04-29 11:26:19,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152667233] [2025-04-29 11:26:19,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:19,876 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-29 11:26:19,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:26:19,876 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-29 11:26:19,876 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2025-04-29 11:26:20,079 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-04-29 11:26:20,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 42 transitions, 315 flow. Second operand has 14 states, 14 states have (on average 15.214285714285714) internal successors, (213), 14 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:20,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:20,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-04-29 11:26:20,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:20,198 INFO L116 PetriNetUnfolderBase]: 55/184 cut-off events. [2025-04-29 11:26:20,198 INFO L117 PetriNetUnfolderBase]: For 587/587 co-relation queries the response was YES. [2025-04-29 11:26:20,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 664 conditions, 184 events. 55/184 cut-off events. For 587/587 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 234 event pairs, 2 based on Foata normal form. 8/192 useless extension candidates. Maximal degree in co-relation 621. Up to 80 conditions per place. [2025-04-29 11:26:20,200 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 22 selfloop transitions, 19 changer transitions 0/46 dead transitions. [2025-04-29 11:26:20,201 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 46 transitions, 399 flow [2025-04-29 11:26:20,201 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-29 11:26:20,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-29 11:26:20,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 96 transitions. [2025-04-29 11:26:20,201 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.45714285714285713 [2025-04-29 11:26:20,202 INFO L175 Difference]: Start difference. First operand has 68 places, 42 transitions, 315 flow. Second operand 6 states and 96 transitions. [2025-04-29 11:26:20,202 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 46 transitions, 399 flow [2025-04-29 11:26:20,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 46 transitions, 374 flow, removed 0 selfloop flow, removed 8 redundant places. [2025-04-29 11:26:20,205 INFO L231 Difference]: Finished difference. Result has 65 places, 42 transitions, 335 flow [2025-04-29 11:26:20,205 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=280, PETRI_DIFFERENCE_MINUEND_PLACES=59, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=335, PETRI_PLACES=65, PETRI_TRANSITIONS=42} [2025-04-29 11:26:20,206 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 29 predicate places. [2025-04-29 11:26:20,206 INFO L485 AbstractCegarLoop]: Abstraction has has 65 places, 42 transitions, 335 flow [2025-04-29 11:26:20,206 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 15.214285714285714) internal successors, (213), 14 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:20,206 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:20,206 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:20,216 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2025-04-29 11:26:20,406 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:20,406 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:20,407 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:20,407 INFO L85 PathProgramCache]: Analyzing trace with hash 22151360, now seen corresponding path program 3 times [2025-04-29 11:26:20,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:26:20,407 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1053928147] [2025-04-29 11:26:20,407 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-29 11:26:20,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:26:20,412 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 4 equivalence classes. [2025-04-29 11:26:20,433 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 39 of 39 statements. [2025-04-29 11:26:20,434 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-04-29 11:26:20,434 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:20,718 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:20,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:26:20,718 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1053928147] [2025-04-29 11:26:20,718 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1053928147] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:26:20,718 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846795792] [2025-04-29 11:26:20,718 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-29 11:26:20,718 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:20,719 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:20,720 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) [2025-04-29 11:26:20,722 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-04-29 11:26:20,753 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 4 equivalence classes. [2025-04-29 11:26:20,774 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 39 of 39 statements. [2025-04-29 11:26:20,774 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-04-29 11:26:20,774 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:20,777 INFO L256 TraceCheckSpWp]: Trace formula consists of 210 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-04-29 11:26:20,778 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:20,945 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-29 11:26:20,954 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:20,954 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:21,047 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:21,047 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1846795792] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:26:21,048 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 11:26:21,048 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2025-04-29 11:26:21,048 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1840521927] [2025-04-29 11:26:21,048 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:21,048 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2025-04-29 11:26:21,048 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:26:21,049 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2025-04-29 11:26:21,049 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=342, Unknown=0, NotChecked=0, Total=420 [2025-04-29 11:26:21,323 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 35 [2025-04-29 11:26:21,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 42 transitions, 335 flow. Second operand has 21 states, 21 states have (on average 19.095238095238095) internal successors, (401), 21 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:21,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:21,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 35 [2025-04-29 11:26:21,323 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:21,582 INFO L116 PetriNetUnfolderBase]: 40/167 cut-off events. [2025-04-29 11:26:21,582 INFO L117 PetriNetUnfolderBase]: For 704/704 co-relation queries the response was YES. [2025-04-29 11:26:21,583 INFO L83 FinitePrefix]: Finished finitePrefix Result has 620 conditions, 167 events. 40/167 cut-off events. For 704/704 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 210 event pairs, 18 based on Foata normal form. 2/169 useless extension candidates. Maximal degree in co-relation 577. Up to 71 conditions per place. [2025-04-29 11:26:21,583 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 36 selfloop transitions, 9 changer transitions 0/52 dead transitions. [2025-04-29 11:26:21,584 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 52 transitions, 458 flow [2025-04-29 11:26:21,584 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-29 11:26:21,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-29 11:26:21,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 199 transitions. [2025-04-29 11:26:21,585 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5685714285714286 [2025-04-29 11:26:21,585 INFO L175 Difference]: Start difference. First operand has 65 places, 42 transitions, 335 flow. Second operand 10 states and 199 transitions. [2025-04-29 11:26:21,585 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 52 transitions, 458 flow [2025-04-29 11:26:21,587 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 52 transitions, 430 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-29 11:26:21,587 INFO L231 Difference]: Finished difference. Result has 72 places, 42 transitions, 331 flow [2025-04-29 11:26:21,587 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=331, PETRI_PLACES=72, PETRI_TRANSITIONS=42} [2025-04-29 11:26:21,589 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 36 predicate places. [2025-04-29 11:26:21,589 INFO L485 AbstractCegarLoop]: Abstraction has has 72 places, 42 transitions, 331 flow [2025-04-29 11:26:21,590 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 19.095238095238095) internal successors, (401), 21 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:21,590 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:21,590 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 5, 5, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:21,596 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2025-04-29 11:26:21,791 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:21,791 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:21,791 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:21,791 INFO L85 PathProgramCache]: Analyzing trace with hash -2134740141, now seen corresponding path program 4 times [2025-04-29 11:26:21,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:26:21,791 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025371165] [2025-04-29 11:26:21,791 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-29 11:26:21,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:26:21,796 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 45 statements into 2 equivalence classes. [2025-04-29 11:26:21,806 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-04-29 11:26:21,806 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-29 11:26:21,806 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:22,100 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:22,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:26:22,100 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025371165] [2025-04-29 11:26:22,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025371165] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:26:22,100 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1915639019] [2025-04-29 11:26:22,100 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-29 11:26:22,101 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:22,101 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:22,103 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) [2025-04-29 11:26:22,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-04-29 11:26:22,136 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 45 statements into 2 equivalence classes. [2025-04-29 11:26:22,157 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 45 of 45 statements. [2025-04-29 11:26:22,157 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-29 11:26:22,157 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:22,158 INFO L256 TraceCheckSpWp]: Trace formula consists of 231 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-04-29 11:26:22,159 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:22,362 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-29 11:26:22,376 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:22,376 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:22,491 INFO L134 CoverageAnalysis]: Checked inductivity of 60 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:22,491 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1915639019] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:26:22,491 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 11:26:22,491 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 8] total 24 [2025-04-29 11:26:22,491 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410494564] [2025-04-29 11:26:22,491 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:22,491 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2025-04-29 11:26:22,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:26:22,492 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2025-04-29 11:26:22,492 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=507, Unknown=0, NotChecked=0, Total=600 [2025-04-29 11:26:23,019 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 35 [2025-04-29 11:26:23,020 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 42 transitions, 331 flow. Second operand has 25 states, 25 states have (on average 18.04) internal successors, (451), 25 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:23,020 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:23,020 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 35 [2025-04-29 11:26:23,020 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:23,297 INFO L116 PetriNetUnfolderBase]: 37/162 cut-off events. [2025-04-29 11:26:23,297 INFO L117 PetriNetUnfolderBase]: For 595/595 co-relation queries the response was YES. [2025-04-29 11:26:23,297 INFO L83 FinitePrefix]: Finished finitePrefix Result has 598 conditions, 162 events. 37/162 cut-off events. For 595/595 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 200 event pairs, 13 based on Foata normal form. 2/164 useless extension candidates. Maximal degree in co-relation 555. Up to 52 conditions per place. [2025-04-29 11:26:23,298 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 36 selfloop transitions, 10 changer transitions 0/56 dead transitions. [2025-04-29 11:26:23,298 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 82 places, 56 transitions, 449 flow [2025-04-29 11:26:23,299 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-29 11:26:23,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-29 11:26:23,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 208 transitions. [2025-04-29 11:26:23,301 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5402597402597402 [2025-04-29 11:26:23,301 INFO L175 Difference]: Start difference. First operand has 72 places, 42 transitions, 331 flow. Second operand 11 states and 208 transitions. [2025-04-29 11:26:23,301 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 82 places, 56 transitions, 449 flow [2025-04-29 11:26:23,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 56 transitions, 427 flow, removed 3 selfloop flow, removed 8 redundant places. [2025-04-29 11:26:23,304 INFO L231 Difference]: Finished difference. Result has 76 places, 42 transitions, 335 flow [2025-04-29 11:26:23,304 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=335, PETRI_PLACES=76, PETRI_TRANSITIONS=42} [2025-04-29 11:26:23,305 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 40 predicate places. [2025-04-29 11:26:23,305 INFO L485 AbstractCegarLoop]: Abstraction has has 76 places, 42 transitions, 335 flow [2025-04-29 11:26:23,305 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 18.04) internal successors, (451), 25 states have internal predecessors, (451), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:23,305 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:23,305 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:23,312 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-04-29 11:26:23,505 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2025-04-29 11:26:23,505 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:23,506 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:23,506 INFO L85 PathProgramCache]: Analyzing trace with hash -1324631942, now seen corresponding path program 5 times [2025-04-29 11:26:23,506 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:26:23,506 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819025255] [2025-04-29 11:26:23,506 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-29 11:26:23,506 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:26:23,511 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 6 equivalence classes. [2025-04-29 11:26:23,521 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 51 of 51 statements. [2025-04-29 11:26:23,521 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-04-29 11:26:23,521 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:23,684 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:23,684 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:26:23,685 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819025255] [2025-04-29 11:26:23,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819025255] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:26:23,685 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1056391987] [2025-04-29 11:26:23,685 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-29 11:26:23,685 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:23,685 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:23,687 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) [2025-04-29 11:26:23,688 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-04-29 11:26:23,719 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 51 statements into 6 equivalence classes. [2025-04-29 11:26:23,743 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) and asserted 51 of 51 statements. [2025-04-29 11:26:23,743 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2025-04-29 11:26:23,743 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:23,744 INFO L256 TraceCheckSpWp]: Trace formula consists of 252 conjuncts, 19 conjuncts are in the unsatisfiable core [2025-04-29 11:26:23,746 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:23,993 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-29 11:26:24,007 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:24,007 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:24,140 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:24,140 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1056391987] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:26:24,140 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 11:26:24,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 25 [2025-04-29 11:26:24,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720467389] [2025-04-29 11:26:24,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:24,141 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 26 states [2025-04-29 11:26:24,141 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:26:24,141 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2025-04-29 11:26:24,142 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=553, Unknown=0, NotChecked=0, Total=650 [2025-04-29 11:26:24,657 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 35 [2025-04-29 11:26:24,657 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 42 transitions, 335 flow. Second operand has 26 states, 26 states have (on average 19.576923076923077) internal successors, (509), 26 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:24,657 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:24,657 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 35 [2025-04-29 11:26:24,657 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:24,929 INFO L116 PetriNetUnfolderBase]: 26/149 cut-off events. [2025-04-29 11:26:24,929 INFO L117 PetriNetUnfolderBase]: For 619/619 co-relation queries the response was YES. [2025-04-29 11:26:24,930 INFO L83 FinitePrefix]: Finished finitePrefix Result has 550 conditions, 149 events. 26/149 cut-off events. For 619/619 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 182 event pairs, 9 based on Foata normal form. 2/151 useless extension candidates. Maximal degree in co-relation 503. Up to 38 conditions per place. [2025-04-29 11:26:24,930 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 29 selfloop transitions, 10 changer transitions 0/50 dead transitions. [2025-04-29 11:26:24,930 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 50 transitions, 429 flow [2025-04-29 11:26:24,931 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2025-04-29 11:26:24,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2025-04-29 11:26:24,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2025-04-29 11:26:24,933 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5844155844155844 [2025-04-29 11:26:24,934 INFO L175 Difference]: Start difference. First operand has 76 places, 42 transitions, 335 flow. Second operand 11 states and 225 transitions. [2025-04-29 11:26:24,934 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 50 transitions, 429 flow [2025-04-29 11:26:24,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 50 transitions, 403 flow, removed 4 selfloop flow, removed 9 redundant places. [2025-04-29 11:26:24,936 INFO L231 Difference]: Finished difference. Result has 79 places, 42 transitions, 337 flow [2025-04-29 11:26:24,936 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=67, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=337, PETRI_PLACES=79, PETRI_TRANSITIONS=42} [2025-04-29 11:26:24,937 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 43 predicate places. [2025-04-29 11:26:24,938 INFO L485 AbstractCegarLoop]: Abstraction has has 79 places, 42 transitions, 337 flow [2025-04-29 11:26:24,938 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 26 states, 26 states have (on average 19.576923076923077) internal successors, (509), 26 states have internal predecessors, (509), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:24,938 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:24,938 INFO L206 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:24,944 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-04-29 11:26:25,142 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2025-04-29 11:26:25,142 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:25,142 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:25,142 INFO L85 PathProgramCache]: Analyzing trace with hash -476035999, now seen corresponding path program 6 times [2025-04-29 11:26:25,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:26:25,143 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912160482] [2025-04-29 11:26:25,143 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-29 11:26:25,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:26:25,148 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 57 statements into 7 equivalence classes. [2025-04-29 11:26:25,164 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 57 of 57 statements. [2025-04-29 11:26:25,164 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-04-29 11:26:25,165 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:25,820 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:25,820 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:26:25,821 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912160482] [2025-04-29 11:26:25,821 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [912160482] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:26:25,821 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [866583520] [2025-04-29 11:26:25,821 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-29 11:26:25,821 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:25,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:25,823 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) [2025-04-29 11:26:25,824 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-04-29 11:26:25,857 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 57 statements into 7 equivalence classes. [2025-04-29 11:26:25,887 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) and asserted 57 of 57 statements. [2025-04-29 11:26:25,888 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2025-04-29 11:26:25,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:25,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 273 conjuncts, 21 conjuncts are in the unsatisfiable core [2025-04-29 11:26:25,890 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:26,164 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2025-04-29 11:26:26,176 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:26,176 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:26,342 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:26,342 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [866583520] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:26:26,342 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 11:26:26,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 10, 10] total 29 [2025-04-29 11:26:26,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794580208] [2025-04-29 11:26:26,343 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:26,343 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 30 states [2025-04-29 11:26:26,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:26:26,343 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 30 interpolants. [2025-04-29 11:26:26,344 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=741, Unknown=0, NotChecked=0, Total=870 [2025-04-29 11:26:26,773 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 35 [2025-04-29 11:26:26,773 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 42 transitions, 337 flow. Second operand has 30 states, 30 states have (on average 19.133333333333333) internal successors, (574), 30 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:26,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:26,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 35 [2025-04-29 11:26:26,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:27,347 INFO L116 PetriNetUnfolderBase]: 32/159 cut-off events. [2025-04-29 11:26:27,348 INFO L117 PetriNetUnfolderBase]: For 709/709 co-relation queries the response was YES. [2025-04-29 11:26:27,348 INFO L83 FinitePrefix]: Finished finitePrefix Result has 584 conditions, 159 events. 32/159 cut-off events. For 709/709 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 189 event pairs, 7 based on Foata normal form. 2/161 useless extension candidates. Maximal degree in co-relation 537. Up to 32 conditions per place. [2025-04-29 11:26:27,349 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 38 selfloop transitions, 12 changer transitions 0/57 dead transitions. [2025-04-29 11:26:27,349 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 57 transitions, 498 flow [2025-04-29 11:26:27,349 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-04-29 11:26:27,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-04-29 11:26:27,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 259 transitions. [2025-04-29 11:26:27,350 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5692307692307692 [2025-04-29 11:26:27,350 INFO L175 Difference]: Start difference. First operand has 79 places, 42 transitions, 337 flow. Second operand 13 states and 259 transitions. [2025-04-29 11:26:27,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 57 transitions, 498 flow [2025-04-29 11:26:27,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 57 transitions, 470 flow, removed 5 selfloop flow, removed 9 redundant places. [2025-04-29 11:26:27,354 INFO L231 Difference]: Finished difference. Result has 84 places, 42 transitions, 343 flow [2025-04-29 11:26:27,354 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=297, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=343, PETRI_PLACES=84, PETRI_TRANSITIONS=42} [2025-04-29 11:26:27,356 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 48 predicate places. [2025-04-29 11:26:27,356 INFO L485 AbstractCegarLoop]: Abstraction has has 84 places, 42 transitions, 343 flow [2025-04-29 11:26:27,356 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 30 states, 30 states have (on average 19.133333333333333) internal successors, (574), 30 states have internal predecessors, (574), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:27,357 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:27,357 INFO L206 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:27,363 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2025-04-29 11:26:27,557 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2025-04-29 11:26:27,560 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:27,561 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:27,561 INFO L85 PathProgramCache]: Analyzing trace with hash -356638563, now seen corresponding path program 3 times [2025-04-29 11:26:27,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:26:27,561 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827049097] [2025-04-29 11:26:27,561 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-29 11:26:27,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:26:27,566 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 9 equivalence classes. [2025-04-29 11:26:27,570 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 59 statements. [2025-04-29 11:26:27,570 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-29 11:26:27,570 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:27,687 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-04-29 11:26:27,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2025-04-29 11:26:27,687 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827049097] [2025-04-29 11:26:27,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827049097] provided 0 perfect and 1 imperfect interpolant sequences [2025-04-29 11:26:27,687 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [88641990] [2025-04-29 11:26:27,687 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-29 11:26:27,688 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:27,688 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:27,689 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) [2025-04-29 11:26:27,691 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-04-29 11:26:27,741 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 9 equivalence classes. [2025-04-29 11:26:27,751 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 59 statements. [2025-04-29 11:26:27,752 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-29 11:26:27,752 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:27,753 INFO L256 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 27 conjuncts are in the unsatisfiable core [2025-04-29 11:26:27,754 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:27,771 INFO L325 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2025-04-29 11:26:27,771 INFO L354 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 [2025-04-29 11:26:27,775 INFO L354 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 [2025-04-29 11:26:28,065 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-29 11:26:28,065 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 15 treesize of output 15 [2025-04-29 11:26:28,110 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 21 proven. 23 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-04-29 11:26:28,110 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:28,333 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 140 trivial. 0 not checked. [2025-04-29 11:26:28,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [88641990] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:26:28,333 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2025-04-29 11:26:28,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 17 [2025-04-29 11:26:28,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [310934179] [2025-04-29 11:26:28,333 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:28,334 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-29 11:26:28,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2025-04-29 11:26:28,334 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-29 11:26:28,334 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2025-04-29 11:26:28,536 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 35 [2025-04-29 11:26:28,537 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 42 transitions, 343 flow. Second operand has 19 states, 19 states have (on average 13.526315789473685) internal successors, (257), 19 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:28,537 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:28,537 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 35 [2025-04-29 11:26:28,537 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:28,658 INFO L116 PetriNetUnfolderBase]: 41/166 cut-off events. [2025-04-29 11:26:28,658 INFO L117 PetriNetUnfolderBase]: For 625/625 co-relation queries the response was YES. [2025-04-29 11:26:28,660 INFO L83 FinitePrefix]: Finished finitePrefix Result has 608 conditions, 166 events. 41/166 cut-off events. For 625/625 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 189 event pairs, 3 based on Foata normal form. 2/168 useless extension candidates. Maximal degree in co-relation 559. Up to 72 conditions per place. [2025-04-29 11:26:28,660 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 21 selfloop transitions, 19 changer transitions 0/45 dead transitions. [2025-04-29 11:26:28,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 45 transitions, 413 flow [2025-04-29 11:26:28,661 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-29 11:26:28,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-29 11:26:28,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 92 transitions. [2025-04-29 11:26:28,662 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4380952380952381 [2025-04-29 11:26:28,662 INFO L175 Difference]: Start difference. First operand has 84 places, 42 transitions, 343 flow. Second operand 6 states and 92 transitions. [2025-04-29 11:26:28,662 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 45 transitions, 413 flow [2025-04-29 11:26:28,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 45 transitions, 354 flow, removed 6 selfloop flow, removed 19 redundant places. [2025-04-29 11:26:28,665 INFO L231 Difference]: Finished difference. Result has 69 places, 41 transitions, 304 flow [2025-04-29 11:26:28,665 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=266, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=41, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=304, PETRI_PLACES=69, PETRI_TRANSITIONS=41} [2025-04-29 11:26:28,666 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 33 predicate places. [2025-04-29 11:26:28,666 INFO L485 AbstractCegarLoop]: Abstraction has has 69 places, 41 transitions, 304 flow [2025-04-29 11:26:28,666 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 13.526315789473685) internal successors, (257), 19 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:28,666 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:28,666 INFO L206 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:28,672 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-04-29 11:26:28,871 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2025-04-29 11:26:28,871 INFO L403 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:28,871 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:28,871 INFO L85 PathProgramCache]: Analyzing trace with hash -218004772, now seen corresponding path program 7 times [2025-04-29 11:26:28,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2025-04-29 11:26:28,871 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1408508959] [2025-04-29 11:26:28,871 INFO L95 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2025-04-29 11:26:28,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2025-04-29 11:26:28,878 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-04-29 11:26:28,886 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-04-29 11:26:28,888 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:28,888 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-29 11:26:28,888 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-29 11:26:28,891 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-04-29 11:26:28,899 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-04-29 11:26:28,902 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:28,902 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-29 11:26:28,927 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2025-04-29 11:26:28,927 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-29 11:26:28,928 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (16 of 17 remaining) [2025-04-29 11:26:28,928 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 17 remaining) [2025-04-29 11:26:28,929 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 17 remaining) [2025-04-29 11:26:28,929 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 17 remaining) [2025-04-29 11:26:28,929 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (12 of 17 remaining) [2025-04-29 11:26:28,929 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 17 remaining) [2025-04-29 11:26:28,930 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 17 remaining) [2025-04-29 11:26:28,930 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 17 remaining) [2025-04-29 11:26:28,930 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 17 remaining) [2025-04-29 11:26:28,930 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 17 remaining) [2025-04-29 11:26:28,930 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 17 remaining) [2025-04-29 11:26:28,930 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (5 of 17 remaining) [2025-04-29 11:26:28,930 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (4 of 17 remaining) [2025-04-29 11:26:28,930 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (3 of 17 remaining) [2025-04-29 11:26:28,930 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (2 of 17 remaining) [2025-04-29 11:26:28,930 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 17 remaining) [2025-04-29 11:26:28,930 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 17 remaining) [2025-04-29 11:26:28,930 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2025-04-29 11:26:28,931 INFO L422 BasicCegarLoop]: Path program histogram: [7, 3, 2, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:28,978 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-29 11:26:28,978 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-29 11:26:28,982 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.04 11:26:28 BasicIcfg [2025-04-29 11:26:28,982 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-29 11:26:28,982 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-04-29 11:26:28,982 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-04-29 11:26:28,983 INFO L274 PluginConnector]: Witness Printer initialized [2025-04-29 11:26:28,983 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 11:26:12" (3/4) ... [2025-04-29 11:26:28,984 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-04-29 11:26:28,984 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-04-29 11:26:28,985 INFO L158 Benchmark]: Toolchain (without parser) took 17120.61ms. Allocated memory was 167.8MB in the beginning and 453.0MB in the end (delta: 285.2MB). Free memory was 129.7MB in the beginning and 169.5MB in the end (delta: -39.8MB). Peak memory consumption was 244.8MB. Max. memory is 16.1GB. [2025-04-29 11:26:28,985 INFO L158 Benchmark]: CDTParser took 0.23ms. Allocated memory is still 201.3MB. Free memory is still 125.9MB. There was no memory consumed. Max. memory is 16.1GB. [2025-04-29 11:26:28,986 INFO L158 Benchmark]: CACSL2BoogieTranslator took 246.70ms. Allocated memory is still 167.8MB. Free memory was 129.7MB in the beginning and 115.8MB in the end (delta: 13.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-04-29 11:26:28,986 INFO L158 Benchmark]: Boogie Procedure Inliner took 24.01ms. Allocated memory is still 167.8MB. Free memory was 115.8MB in the beginning and 114.0MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-29 11:26:28,986 INFO L158 Benchmark]: Boogie Preprocessor took 31.53ms. Allocated memory is still 167.8MB. Free memory was 114.0MB in the beginning and 112.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-29 11:26:28,986 INFO L158 Benchmark]: RCFGBuilder took 308.36ms. Allocated memory is still 167.8MB. Free memory was 112.3MB in the beginning and 90.2MB in the end (delta: 22.0MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-04-29 11:26:28,987 INFO L158 Benchmark]: TraceAbstraction took 16503.99ms. Allocated memory was 167.8MB in the beginning and 453.0MB in the end (delta: 285.2MB). Free memory was 89.8MB in the beginning and 169.7MB in the end (delta: -79.9MB). Peak memory consumption was 202.9MB. Max. memory is 16.1GB. [2025-04-29 11:26:28,987 INFO L158 Benchmark]: Witness Printer took 2.09ms. Allocated memory is still 453.0MB. Free memory was 169.7MB in the beginning and 169.5MB in the end (delta: 138.5kB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-29 11:26:28,988 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.23ms. Allocated memory is still 201.3MB. Free memory is still 125.9MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 246.70ms. Allocated memory is still 167.8MB. Free memory was 129.7MB in the beginning and 115.8MB in the end (delta: 13.9MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 24.01ms. Allocated memory is still 167.8MB. Free memory was 115.8MB in the beginning and 114.0MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 31.53ms. Allocated memory is still 167.8MB. Free memory was 114.0MB in the beginning and 112.7MB in the end (delta: 1.3MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 308.36ms. Allocated memory is still 167.8MB. Free memory was 112.3MB in the beginning and 90.2MB in the end (delta: 22.0MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 16503.99ms. Allocated memory was 167.8MB in the beginning and 453.0MB in the end (delta: 285.2MB). Free memory was 89.8MB in the beginning and 169.7MB in the end (delta: -79.9MB). Peak memory consumption was 202.9MB. Max. memory is 16.1GB. * Witness Printer took 2.09ms. Allocated memory is still 453.0MB. Free memory was 169.7MB in the beginning and 169.5MB in the end (delta: 138.5kB). There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 34]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 34. Possible FailurePath: [L19] 0 char *v; [L36] 0 pthread_t t1, t2; [L38] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [\at(arg, Pre)={0:0}, t1=-1, v={0:0}] [L23] 1 v = malloc(sizeof(char) * 8) [L24] 1 return 0; [L39] FCALL, JOIN 1 pthread_join(t1, 0) VAL [\at(arg, Pre)={0:0}, \result={0:0}, arg={0:0}, t1=-1, v={-2:0}] [L41] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [\at(arg, Pre)={0:0}, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-2:0}] [L29] COND TRUE 2 \read(*v) [L29] FCALL 2 strcpy(v, "Bigshot") [L30] 2 return 0; [L42] FCALL, JOIN 2 pthread_join(t2, 0) VAL [\at(arg, Pre)={0:0}, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-2:0}] [L44] EXPR 0 v[0] [L44] CALL 0 __VERIFIER_assert(v[0] == 'B') [L17] COND FALSE 0 !(!expression) [L44] RET 0 __VERIFIER_assert(v[0] == 'B') [L46] 0 return 0; VAL [\at(arg, Pre)={0:0}, \result=0, \result={0:0}, arg={0:0}, t1=-1, t2=0, v={-2:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 38]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 41]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 54 locations, 59 edges, 17 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 16.4s, OverallIterations: 18, TraceHistogramMax: 9, PathProgramHistogramMax: 7, EmptinessCheckTime: 0.0s, AutomataDifference: 6.3s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 2611 SdHoareTripleChecker+Valid, 4.5s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2326 mSDsluCounter, 2378 SdHoareTripleChecker+Invalid, 3.8s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2363 mSDsCounter, 65 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 12009 IncrementalHoareTripleChecker+Invalid, 12074 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 65 mSolverCounterUnsat, 15 mSDtfsCounter, 12009 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 987 GetRequests, 706 SyntacticMatches, 0 SemanticMatches, 281 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1374 ImplicationChecksByTransitivity, 3.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=343occurred in iteration=16, InterpolantAutomatonStates: 124, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.4s SatisfiabilityAnalysisTime, 6.8s InterpolantComputationTime, 981 NumberOfCodeBlocks, 849 NumberOfCodeBlocksAsserted, 65 NumberOfCheckSat, 1298 ConstructedInterpolants, 12 QuantifiedInterpolants, 20093 SizeOfPredicates, 42 NumberOfNonLiveVariables, 1993 ConjunctsInSsa, 196 ConjunctsInUnsatCore, 39 InterpolantComputations, 6 PerfectInterpolantSequences, 573/1866 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2025-04-29 11:26:29,001 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### 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 ../../../trunk/examples/svcomp/pthread/bigshot_s2.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.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 b1c9926ef1a542691da0bbc2caae83d3d245c7fc81e06ca7a92bd57a51ff68c4 --- Real Ultimate output --- This is Ultimate 0.3.0-wip.fs.system-includes-da04345-m [2025-04-29 11:26:30,771 INFO L188 SettingsManager]: Resetting all preferences to default values... [2025-04-29 11:26:30,848 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2025-04-29 11:26:30,852 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2025-04-29 11:26:30,852 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2025-04-29 11:26:30,872 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2025-04-29 11:26:30,872 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2025-04-29 11:26:30,873 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2025-04-29 11:26:30,873 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2025-04-29 11:26:30,873 INFO L153 SettingsManager]: * Use memory slicer=true [2025-04-29 11:26:30,873 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2025-04-29 11:26:30,873 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2025-04-29 11:26:30,873 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2025-04-29 11:26:30,873 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2025-04-29 11:26:30,874 INFO L153 SettingsManager]: * Use SBE=true [2025-04-29 11:26:30,874 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2025-04-29 11:26:30,874 INFO L153 SettingsManager]: * sizeof long=4 [2025-04-29 11:26:30,874 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2025-04-29 11:26:30,874 INFO L153 SettingsManager]: * sizeof POINTER=4 [2025-04-29 11:26:30,874 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2025-04-29 11:26:30,874 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2025-04-29 11:26:30,874 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2025-04-29 11:26:30,874 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2025-04-29 11:26:30,874 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2025-04-29 11:26:30,874 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2025-04-29 11:26:30,875 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2025-04-29 11:26:30,875 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2025-04-29 11:26:30,875 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2025-04-29 11:26:30,875 INFO L153 SettingsManager]: * sizeof long double=12 [2025-04-29 11:26:30,875 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2025-04-29 11:26:30,875 INFO L153 SettingsManager]: * Use constant arrays=true [2025-04-29 11:26:30,875 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2025-04-29 11:26:30,875 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-29 11:26:30,875 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-29 11:26:30,875 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-29 11:26:30,875 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 11:26:30,876 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2025-04-29 11:26:30,876 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2025-04-29 11:26:30,876 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2025-04-29 11:26:30,876 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2025-04-29 11:26:30,876 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 11:26:30,876 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2025-04-29 11:26:30,876 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2025-04-29 11:26:30,876 INFO L153 SettingsManager]: * Trace refinement strategy=FOX [2025-04-29 11:26:30,876 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2025-04-29 11:26:30,876 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2025-04-29 11:26:30,876 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2025-04-29 11:26:30,876 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2025-04-29 11:26:30,877 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 -> b1c9926ef1a542691da0bbc2caae83d3d245c7fc81e06ca7a92bd57a51ff68c4 [2025-04-29 11:26:31,127 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2025-04-29 11:26:31,133 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2025-04-29 11:26:31,135 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2025-04-29 11:26:31,136 INFO L270 PluginConnector]: Initializing CDTParser... [2025-04-29 11:26:31,136 INFO L274 PluginConnector]: CDTParser initialized [2025-04-29 11:26:31,137 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/bigshot_s2.c [2025-04-29 11:26:32,448 INFO L538 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35092ba4a/f63e444bef2e4765ae394c7cc1780793/FLAG39faf8865 [2025-04-29 11:26:32,616 INFO L389 CDTParser]: Found 1 translation units. [2025-04-29 11:26:32,616 INFO L178 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/bigshot_s2.c [2025-04-29 11:26:32,617 WARN L117 ultiparseSymbolTable]: System include assert.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:26:32,617 WARN L117 ultiparseSymbolTable]: System include stdlib.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:26:32,617 WARN L117 ultiparseSymbolTable]: System include pthread.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:26:32,617 WARN L117 ultiparseSymbolTable]: System include string.h could not be resolved by CDT -- only built-in system includes are available. [2025-04-29 11:26:32,621 INFO L432 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35092ba4a/f63e444bef2e4765ae394c7cc1780793/FLAG39faf8865 [2025-04-29 11:26:33,497 INFO L440 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/35092ba4a/f63e444bef2e4765ae394c7cc1780793 [2025-04-29 11:26:33,499 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2025-04-29 11:26:33,500 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2025-04-29 11:26:33,501 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2025-04-29 11:26:33,501 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2025-04-29 11:26:33,504 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2025-04-29 11:26:33,505 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.04 11:26:33" (1/1) ... [2025-04-29 11:26:33,506 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@1b5e3217 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:33, skipping insertion in model container [2025-04-29 11:26:33,506 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.04 11:26:33" (1/1) ... [2025-04-29 11:26:33,515 INFO L175 MainTranslator]: Built tables and reachable declarations [2025-04-29 11:26:33,654 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-29 11:26:33,667 INFO L200 MainTranslator]: Completed pre-run [2025-04-29 11:26:33,687 INFO L211 PostProcessor]: Analyzing one entry point: main [2025-04-29 11:26:33,697 INFO L204 MainTranslator]: Completed translation [2025-04-29 11:26:33,698 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:33 WrapperNode [2025-04-29 11:26:33,698 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2025-04-29 11:26:33,699 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2025-04-29 11:26:33,699 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2025-04-29 11:26:33,699 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2025-04-29 11:26:33,703 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:33" (1/1) ... [2025-04-29 11:26:33,715 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:33" (1/1) ... [2025-04-29 11:26:33,731 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 58 [2025-04-29 11:26:33,731 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2025-04-29 11:26:33,732 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2025-04-29 11:26:33,732 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2025-04-29 11:26:33,732 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2025-04-29 11:26:33,737 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:33" (1/1) ... [2025-04-29 11:26:33,738 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:33" (1/1) ... [2025-04-29 11:26:33,742 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:33" (1/1) ... [2025-04-29 11:26:33,755 INFO L175 MemorySlicer]: Split 11 memory accesses to 2 slices as follows [9, 2]. 82 percent of accesses are in the largest equivalence class. The 8 initializations are split as follows [8, 0]. The 1 writes are split as follows [0, 1]. [2025-04-29 11:26:33,755 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:33" (1/1) ... [2025-04-29 11:26:33,756 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:33" (1/1) ... [2025-04-29 11:26:33,766 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:33" (1/1) ... [2025-04-29 11:26:33,766 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:33" (1/1) ... [2025-04-29 11:26:33,768 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:33" (1/1) ... [2025-04-29 11:26:33,769 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:33" (1/1) ... [2025-04-29 11:26:33,770 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:33" (1/1) ... [2025-04-29 11:26:33,775 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2025-04-29 11:26:33,775 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2025-04-29 11:26:33,775 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2025-04-29 11:26:33,775 INFO L274 PluginConnector]: RCFGBuilder initialized [2025-04-29 11:26:33,776 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:33" (1/1) ... [2025-04-29 11:26:33,783 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2025-04-29 11:26:33,795 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:33,805 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) [2025-04-29 11:26:33,813 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 [2025-04-29 11:26:33,833 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2025-04-29 11:26:33,833 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2025-04-29 11:26:33,833 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2025-04-29 11:26:33,833 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#0 [2025-04-29 11:26:33,835 INFO L130 BoogieDeclarations]: Found specification of procedure read~intINTTYPE1#1 [2025-04-29 11:26:33,835 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2025-04-29 11:26:33,835 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2025-04-29 11:26:33,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#0 [2025-04-29 11:26:33,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~intINTTYPE1#1 [2025-04-29 11:26:33,835 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2025-04-29 11:26:33,835 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2025-04-29 11:26:33,835 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2025-04-29 11:26:33,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#0 [2025-04-29 11:26:33,835 INFO L130 BoogieDeclarations]: Found specification of procedure write~unchecked~intINTTYPE1#1 [2025-04-29 11:26:33,837 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2025-04-29 11:26:33,944 INFO L234 CfgBuilder]: Building ICFG [2025-04-29 11:26:33,947 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2025-04-29 11:26:34,147 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2025-04-29 11:26:34,147 INFO L283 CfgBuilder]: Performing block encoding [2025-04-29 11:26:34,267 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2025-04-29 11:26:34,267 INFO L312 CfgBuilder]: Removed 1 assume(true) statements. [2025-04-29 11:26:34,267 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 11:26:34 BoogieIcfgContainer [2025-04-29 11:26:34,267 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2025-04-29 11:26:34,277 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2025-04-29 11:26:34,277 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2025-04-29 11:26:34,281 INFO L274 PluginConnector]: TraceAbstraction initialized [2025-04-29 11:26:34,281 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.04 11:26:33" (1/3) ... [2025-04-29 11:26:34,282 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656f1d74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 11:26:34, skipping insertion in model container [2025-04-29 11:26:34,282 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.04 11:26:33" (2/3) ... [2025-04-29 11:26:34,284 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@656f1d74 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.04 11:26:34, skipping insertion in model container [2025-04-29 11:26:34,284 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 11:26:34" (3/3) ... [2025-04-29 11:26:34,285 INFO L128 eAbstractionObserver]: Analyzing ICFG bigshot_s2.c [2025-04-29 11:26:34,295 INFO L217 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2025-04-29 11:26:34,297 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG bigshot_s2.c that has 3 procedures, 33 locations, 33 edges, 1 initial locations, 1 loop locations, and 9 error locations. [2025-04-29 11:26:34,297 INFO L490 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2025-04-29 11:26:34,344 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2025-04-29 11:26:34,373 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 39 places, 35 transitions, 84 flow [2025-04-29 11:26:34,399 INFO L116 PetriNetUnfolderBase]: 3/33 cut-off events. [2025-04-29 11:26:34,401 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-29 11:26:34,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42 conditions, 33 events. 3/33 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 52 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 31. Up to 2 conditions per place. [2025-04-29 11:26:34,402 INFO L82 GeneralOperation]: Start removeDead. Operand has 39 places, 35 transitions, 84 flow [2025-04-29 11:26:34,404 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 36 places, 32 transitions, 76 flow [2025-04-29 11:26:34,413 INFO L339 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2025-04-29 11:26:34,424 INFO L340 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;@34e5b5f2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2025-04-29 11:26:34,424 INFO L341 AbstractCegarLoop]: Starting to check reachability of 17 error locations. [2025-04-29 11:26:34,430 INFO L177 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2025-04-29 11:26:34,431 INFO L116 PetriNetUnfolderBase]: 1/14 cut-off events. [2025-04-29 11:26:34,431 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-29 11:26:34,432 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:34,432 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:34,432 INFO L403 AbstractCegarLoop]: === Iteration 1 === Targeting thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:34,436 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:34,436 INFO L85 PathProgramCache]: Analyzing trace with hash 1883108612, now seen corresponding path program 1 times [2025-04-29 11:26:34,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-29 11:26:34,444 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [722919164] [2025-04-29 11:26:34,444 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:34,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:34,445 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:34,447 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) [2025-04-29 11:26:34,449 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2025-04-29 11:26:34,509 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 10 statements into 1 equivalence classes. [2025-04-29 11:26:34,527 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 10 of 10 statements. [2025-04-29 11:26:34,528 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:34,528 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:34,532 INFO L256 TraceCheckSpWp]: Trace formula consists of 56 conjuncts, 5 conjuncts are in the unsatisfiable core [2025-04-29 11:26:34,535 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:34,615 INFO L325 Elim1Store]: treesize reduction 24, result has 33.3 percent of original size [2025-04-29 11:26:34,616 INFO L354 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 21 treesize of output 20 [2025-04-29 11:26:34,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:34,653 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-29 11:26:34,654 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-29 11:26:34,654 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [722919164] [2025-04-29 11:26:34,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [722919164] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:26:34,654 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:26:34,655 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2025-04-29 11:26:34,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992093469] [2025-04-29 11:26:34,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:26:34,661 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-29 11:26:34,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-29 11:26:34,678 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-29 11:26:34,678 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2025-04-29 11:26:34,713 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 35 [2025-04-29 11:26:34,715 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 32 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:34,715 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:34,715 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 35 [2025-04-29 11:26:34,716 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:34,768 INFO L116 PetriNetUnfolderBase]: 8/49 cut-off events. [2025-04-29 11:26:34,768 INFO L117 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2025-04-29 11:26:34,769 INFO L83 FinitePrefix]: Finished finitePrefix Result has 85 conditions, 49 events. 8/49 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 111 event pairs, 2 based on Foata normal form. 2/43 useless extension candidates. Maximal degree in co-relation 64. Up to 18 conditions per place. [2025-04-29 11:26:34,770 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 13 selfloop transitions, 3 changer transitions 0/30 dead transitions. [2025-04-29 11:26:34,770 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 104 flow [2025-04-29 11:26:34,770 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-29 11:26:34,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-29 11:26:34,778 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 83 transitions. [2025-04-29 11:26:34,780 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5928571428571429 [2025-04-29 11:26:34,781 INFO L175 Difference]: Start difference. First operand has 36 places, 32 transitions, 76 flow. Second operand 4 states and 83 transitions. [2025-04-29 11:26:34,782 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 104 flow [2025-04-29 11:26:34,785 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 96 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-29 11:26:34,787 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 68 flow [2025-04-29 11:26:34,789 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=68, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2025-04-29 11:26:34,791 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2025-04-29 11:26:34,792 INFO L485 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 68 flow [2025-04-29 11:26:34,792 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:34,792 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:34,793 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:34,800 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2025-04-29 11:26:34,994 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:34,994 INFO L403 AbstractCegarLoop]: === Iteration 2 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:34,995 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:34,995 INFO L85 PathProgramCache]: Analyzing trace with hash -1753174939, now seen corresponding path program 1 times [2025-04-29 11:26:34,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-29 11:26:34,995 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [265366939] [2025-04-29 11:26:34,995 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:34,995 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:34,995 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:34,998 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) [2025-04-29 11:26:34,998 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2025-04-29 11:26:35,036 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 11 statements into 1 equivalence classes. [2025-04-29 11:26:35,047 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 11 of 11 statements. [2025-04-29 11:26:35,048 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:35,048 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:35,049 INFO L256 TraceCheckSpWp]: Trace formula consists of 57 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-29 11:26:35,050 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:35,116 INFO L189 IndexEqualityManager]: detected not equals via solver [2025-04-29 11:26:35,117 INFO L354 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 [2025-04-29 11:26:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:35,161 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-29 11:26:35,161 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-29 11:26:35,161 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265366939] [2025-04-29 11:26:35,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265366939] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:26:35,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:26:35,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 11:26:35,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [650650194] [2025-04-29 11:26:35,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:26:35,162 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2025-04-29 11:26:35,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-29 11:26:35,162 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2025-04-29 11:26:35,163 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2025-04-29 11:26:35,240 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 35 [2025-04-29 11:26:35,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 68 flow. Second operand has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:35,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:35,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 35 [2025-04-29 11:26:35,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:35,309 INFO L116 PetriNetUnfolderBase]: 16/75 cut-off events. [2025-04-29 11:26:35,310 INFO L117 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2025-04-29 11:26:35,310 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 75 events. 16/75 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 161 event pairs, 7 based on Foata normal form. 2/65 useless extension candidates. Maximal degree in co-relation 60. Up to 37 conditions per place. [2025-04-29 11:26:35,310 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 19 selfloop transitions, 4 changer transitions 0/34 dead transitions. [2025-04-29 11:26:35,310 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 36 places, 34 transitions, 126 flow [2025-04-29 11:26:35,311 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-29 11:26:35,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-29 11:26:35,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 85 transitions. [2025-04-29 11:26:35,312 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6071428571428571 [2025-04-29 11:26:35,312 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 68 flow. Second operand 4 states and 85 transitions. [2025-04-29 11:26:35,312 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 36 places, 34 transitions, 126 flow [2025-04-29 11:26:35,312 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 34 transitions, 118 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-29 11:26:35,313 INFO L231 Difference]: Finished difference. Result has 34 places, 31 transitions, 85 flow [2025-04-29 11:26:35,313 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=62, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=85, PETRI_PLACES=34, PETRI_TRANSITIONS=31} [2025-04-29 11:26:35,314 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2025-04-29 11:26:35,314 INFO L485 AbstractCegarLoop]: Abstraction has has 34 places, 31 transitions, 85 flow [2025-04-29 11:26:35,314 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 17.0) internal successors, (85), 5 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:35,314 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:35,314 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:35,320 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2025-04-29 11:26:35,514 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:35,515 INFO L403 AbstractCegarLoop]: === Iteration 3 === Targeting thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:35,515 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:35,515 INFO L85 PathProgramCache]: Analyzing trace with hash 1486151974, now seen corresponding path program 1 times [2025-04-29 11:26:35,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-29 11:26:35,516 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1358915188] [2025-04-29 11:26:35,516 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:35,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:35,516 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:35,518 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) [2025-04-29 11:26:35,519 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2025-04-29 11:26:35,552 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 12 statements into 1 equivalence classes. [2025-04-29 11:26:35,562 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 12 of 12 statements. [2025-04-29 11:26:35,562 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:35,562 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:35,563 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 4 conjuncts are in the unsatisfiable core [2025-04-29 11:26:35,563 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:35,568 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 7 [2025-04-29 11:26:35,587 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:35,588 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-29 11:26:35,588 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-29 11:26:35,588 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1358915188] [2025-04-29 11:26:35,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1358915188] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:26:35,589 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:26:35,589 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 11:26:35,589 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1153782522] [2025-04-29 11:26:35,589 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:26:35,589 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-29 11:26:35,590 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-29 11:26:35,590 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-29 11:26:35,590 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-29 11:26:35,637 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 35 [2025-04-29 11:26:35,637 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 31 transitions, 85 flow. Second operand has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:35,637 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:35,638 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 35 [2025-04-29 11:26:35,638 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:35,700 INFO L116 PetriNetUnfolderBase]: 14/68 cut-off events. [2025-04-29 11:26:35,700 INFO L117 PetriNetUnfolderBase]: For 10/10 co-relation queries the response was YES. [2025-04-29 11:26:35,701 INFO L83 FinitePrefix]: Finished finitePrefix Result has 133 conditions, 68 events. 14/68 cut-off events. For 10/10 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 129 event pairs, 1 based on Foata normal form. 0/63 useless extension candidates. Maximal degree in co-relation 45. Up to 20 conditions per place. [2025-04-29 11:26:35,701 INFO L140 encePairwiseOnDemand]: 30/35 looper letters, 16 selfloop transitions, 4 changer transitions 0/31 dead transitions. [2025-04-29 11:26:35,701 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 31 transitions, 125 flow [2025-04-29 11:26:35,702 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-29 11:26:35,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-29 11:26:35,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 80 transitions. [2025-04-29 11:26:35,702 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2025-04-29 11:26:35,702 INFO L175 Difference]: Start difference. First operand has 34 places, 31 transitions, 85 flow. Second operand 4 states and 80 transitions. [2025-04-29 11:26:35,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 31 transitions, 125 flow [2025-04-29 11:26:35,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 31 transitions, 120 flow, removed 0 selfloop flow, removed 2 redundant places. [2025-04-29 11:26:35,703 INFO L231 Difference]: Finished difference. Result has 33 places, 29 transitions, 84 flow [2025-04-29 11:26:35,704 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=76, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=29, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=25, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=84, PETRI_PLACES=33, PETRI_TRANSITIONS=29} [2025-04-29 11:26:35,704 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -3 predicate places. [2025-04-29 11:26:35,704 INFO L485 AbstractCegarLoop]: Abstraction has has 33 places, 29 transitions, 84 flow [2025-04-29 11:26:35,704 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 17.25) internal successors, (69), 4 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:35,704 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:35,704 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:35,711 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2025-04-29 11:26:35,905 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:35,905 INFO L403 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:35,906 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:35,906 INFO L85 PathProgramCache]: Analyzing trace with hash -1174968251, now seen corresponding path program 1 times [2025-04-29 11:26:35,906 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-29 11:26:35,906 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1864519888] [2025-04-29 11:26:35,906 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:35,906 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:35,906 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:35,908 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) [2025-04-29 11:26:35,910 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2025-04-29 11:26:35,945 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-04-29 11:26:35,952 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-04-29 11:26:35,952 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:35,953 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:35,953 INFO L256 TraceCheckSpWp]: Trace formula consists of 58 conjuncts, 2 conjuncts are in the unsatisfiable core [2025-04-29 11:26:35,954 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:35,967 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:35,967 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-29 11:26:35,967 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-29 11:26:35,967 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864519888] [2025-04-29 11:26:35,968 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1864519888] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:26:35,968 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:26:35,968 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 11:26:35,968 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1666474060] [2025-04-29 11:26:35,968 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:26:35,968 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2025-04-29 11:26:35,968 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-29 11:26:35,968 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2025-04-29 11:26:35,968 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2025-04-29 11:26:35,973 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 17 out of 35 [2025-04-29 11:26:35,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 33 places, 29 transitions, 84 flow. Second operand has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:35,973 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:35,973 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 17 of 35 [2025-04-29 11:26:35,973 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:36,009 INFO L116 PetriNetUnfolderBase]: 11/59 cut-off events. [2025-04-29 11:26:36,010 INFO L117 PetriNetUnfolderBase]: For 20/20 co-relation queries the response was YES. [2025-04-29 11:26:36,010 INFO L83 FinitePrefix]: Finished finitePrefix Result has 121 conditions, 59 events. 11/59 cut-off events. For 20/20 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 123 event pairs, 6 based on Foata normal form. 2/56 useless extension candidates. Maximal degree in co-relation 54. Up to 31 conditions per place. [2025-04-29 11:26:36,010 INFO L140 encePairwiseOnDemand]: 33/35 looper letters, 17 selfloop transitions, 1 changer transitions 0/29 dead transitions. [2025-04-29 11:26:36,010 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 35 places, 29 transitions, 120 flow [2025-04-29 11:26:36,011 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2025-04-29 11:26:36,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2025-04-29 11:26:36,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 68 transitions. [2025-04-29 11:26:36,011 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6476190476190476 [2025-04-29 11:26:36,011 INFO L175 Difference]: Start difference. First operand has 33 places, 29 transitions, 84 flow. Second operand 3 states and 68 transitions. [2025-04-29 11:26:36,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 35 places, 29 transitions, 120 flow [2025-04-29 11:26:36,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 32 places, 29 transitions, 112 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-29 11:26:36,013 INFO L231 Difference]: Finished difference. Result has 32 places, 28 transitions, 76 flow [2025-04-29 11:26:36,013 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=28, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=32, PETRI_TRANSITIONS=28} [2025-04-29 11:26:36,013 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -4 predicate places. [2025-04-29 11:26:36,014 INFO L485 AbstractCegarLoop]: Abstraction has has 32 places, 28 transitions, 76 flow [2025-04-29 11:26:36,014 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 20.666666666666668) internal successors, (62), 3 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:36,014 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:36,014 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:36,021 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2025-04-29 11:26:36,214 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:36,214 INFO L403 AbstractCegarLoop]: === Iteration 5 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:36,215 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:36,215 INFO L85 PathProgramCache]: Analyzing trace with hash -1173928825, now seen corresponding path program 1 times [2025-04-29 11:26:36,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-29 11:26:36,215 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [224963678] [2025-04-29 11:26:36,215 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:36,215 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:36,216 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:36,217 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) [2025-04-29 11:26:36,218 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2025-04-29 11:26:36,252 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 13 statements into 1 equivalence classes. [2025-04-29 11:26:36,265 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 13 of 13 statements. [2025-04-29 11:26:36,265 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:36,265 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:36,266 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 7 conjuncts are in the unsatisfiable core [2025-04-29 11:26:36,267 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:36,272 INFO L354 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 [2025-04-29 11:26:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:36,325 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-29 11:26:36,325 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-29 11:26:36,325 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [224963678] [2025-04-29 11:26:36,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [224963678] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:26:36,325 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:26:36,325 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2025-04-29 11:26:36,325 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1306761102] [2025-04-29 11:26:36,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:26:36,326 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2025-04-29 11:26:36,326 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-29 11:26:36,326 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2025-04-29 11:26:36,326 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2025-04-29 11:26:36,369 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 35 [2025-04-29 11:26:36,370 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 32 places, 28 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:36,370 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:36,370 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 35 [2025-04-29 11:26:36,370 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:36,441 INFO L116 PetriNetUnfolderBase]: 12/56 cut-off events. [2025-04-29 11:26:36,441 INFO L117 PetriNetUnfolderBase]: For 8/8 co-relation queries the response was YES. [2025-04-29 11:26:36,441 INFO L83 FinitePrefix]: Finished finitePrefix Result has 113 conditions, 56 events. 12/56 cut-off events. For 8/8 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 99 event pairs, 5 based on Foata normal form. 2/55 useless extension candidates. Maximal degree in co-relation 94. Up to 28 conditions per place. [2025-04-29 11:26:36,442 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 17 selfloop transitions, 4 changer transitions 0/30 dead transitions. [2025-04-29 11:26:36,442 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 34 places, 30 transitions, 122 flow [2025-04-29 11:26:36,443 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2025-04-29 11:26:36,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2025-04-29 11:26:36,443 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 87 transitions. [2025-04-29 11:26:36,443 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.6214285714285714 [2025-04-29 11:26:36,443 INFO L175 Difference]: Start difference. First operand has 32 places, 28 transitions, 76 flow. Second operand 4 states and 87 transitions. [2025-04-29 11:26:36,443 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 34 places, 30 transitions, 122 flow [2025-04-29 11:26:36,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 33 places, 30 transitions, 121 flow, removed 0 selfloop flow, removed 1 redundant places. [2025-04-29 11:26:36,444 INFO L231 Difference]: Finished difference. Result has 34 places, 27 transitions, 86 flow [2025-04-29 11:26:36,444 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=73, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=27, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=86, PETRI_PLACES=34, PETRI_TRANSITIONS=27} [2025-04-29 11:26:36,445 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, -2 predicate places. [2025-04-29 11:26:36,445 INFO L485 AbstractCegarLoop]: Abstraction has has 34 places, 27 transitions, 86 flow [2025-04-29 11:26:36,445 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 18.25) internal successors, (73), 4 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:36,445 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:36,445 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:36,451 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2025-04-29 11:26:36,645 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:36,645 INFO L403 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:36,646 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:36,646 INFO L85 PathProgramCache]: Analyzing trace with hash 614755148, now seen corresponding path program 1 times [2025-04-29 11:26:36,646 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-29 11:26:36,646 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [234211454] [2025-04-29 11:26:36,646 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:36,646 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:36,646 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:36,648 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) [2025-04-29 11:26:36,649 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2025-04-29 11:26:36,677 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 17 statements into 1 equivalence classes. [2025-04-29 11:26:36,687 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 17 of 17 statements. [2025-04-29 11:26:36,688 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:36,688 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:36,690 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-29 11:26:36,691 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:36,710 INFO L325 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-04-29 11:26:36,711 INFO L354 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 [2025-04-29 11:26:36,894 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:36,894 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:37,030 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:37,030 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-29 11:26:37,030 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [234211454] [2025-04-29 11:26:37,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [234211454] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:26:37,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-29 11:26:37,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2025-04-29 11:26:37,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1946898314] [2025-04-29 11:26:37,031 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:37,031 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-04-29 11:26:37,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-29 11:26:37,032 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-04-29 11:26:37,032 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=59, Unknown=0, NotChecked=0, Total=90 [2025-04-29 11:26:37,207 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 35 [2025-04-29 11:26:37,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 34 places, 27 transitions, 86 flow. Second operand has 10 states, 10 states have (on average 17.4) internal successors, (174), 10 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:37,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:37,208 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 35 [2025-04-29 11:26:37,208 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:37,456 INFO L116 PetriNetUnfolderBase]: 25/109 cut-off events. [2025-04-29 11:26:37,456 INFO L117 PetriNetUnfolderBase]: For 41/41 co-relation queries the response was YES. [2025-04-29 11:26:37,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 224 conditions, 109 events. 25/109 cut-off events. For 41/41 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 179 event pairs, 3 based on Foata normal form. 12/119 useless extension candidates. Maximal degree in co-relation 202. Up to 24 conditions per place. [2025-04-29 11:26:37,457 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 23 selfloop transitions, 13 changer transitions 0/43 dead transitions. [2025-04-29 11:26:37,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 41 places, 43 transitions, 196 flow [2025-04-29 11:26:37,458 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2025-04-29 11:26:37,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2025-04-29 11:26:37,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 177 transitions. [2025-04-29 11:26:37,459 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5619047619047619 [2025-04-29 11:26:37,459 INFO L175 Difference]: Start difference. First operand has 34 places, 27 transitions, 86 flow. Second operand 9 states and 177 transitions. [2025-04-29 11:26:37,459 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 41 places, 43 transitions, 196 flow [2025-04-29 11:26:37,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 43 transitions, 188 flow, removed 0 selfloop flow, removed 3 redundant places. [2025-04-29 11:26:37,461 INFO L231 Difference]: Finished difference. Result has 39 places, 31 transitions, 129 flow [2025-04-29 11:26:37,462 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=74, PETRI_DIFFERENCE_MINUEND_PLACES=30, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=26, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=17, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=129, PETRI_PLACES=39, PETRI_TRANSITIONS=31} [2025-04-29 11:26:37,462 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 3 predicate places. [2025-04-29 11:26:37,463 INFO L485 AbstractCegarLoop]: Abstraction has has 39 places, 31 transitions, 129 flow [2025-04-29 11:26:37,463 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 17.4) internal successors, (174), 10 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:37,463 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:37,463 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:37,470 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2025-04-29 11:26:37,668 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:37,668 INFO L403 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:37,668 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:37,669 INFO L85 PathProgramCache]: Analyzing trace with hash -1925782098, now seen corresponding path program 1 times [2025-04-29 11:26:37,669 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-29 11:26:37,669 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1747120683] [2025-04-29 11:26:37,669 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:37,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:37,669 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:37,673 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) [2025-04-29 11:26:37,674 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2025-04-29 11:26:37,702 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 19 statements into 1 equivalence classes. [2025-04-29 11:26:37,712 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 19 of 19 statements. [2025-04-29 11:26:37,713 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:37,713 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:37,715 INFO L256 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 8 conjuncts are in the unsatisfiable core [2025-04-29 11:26:37,716 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:37,721 INFO L354 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 [2025-04-29 11:26:37,824 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:37,824 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:37,903 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:37,903 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-29 11:26:37,903 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1747120683] [2025-04-29 11:26:37,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1747120683] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:26:37,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-29 11:26:37,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2025-04-29 11:26:37,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [443205932] [2025-04-29 11:26:37,903 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:37,903 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2025-04-29 11:26:37,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-29 11:26:37,904 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2025-04-29 11:26:37,904 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2025-04-29 11:26:38,061 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 35 [2025-04-29 11:26:38,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 31 transitions, 129 flow. Second operand has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 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) [2025-04-29 11:26:38,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:38,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 35 [2025-04-29 11:26:38,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:38,222 INFO L116 PetriNetUnfolderBase]: 25/106 cut-off events. [2025-04-29 11:26:38,223 INFO L117 PetriNetUnfolderBase]: For 85/85 co-relation queries the response was YES. [2025-04-29 11:26:38,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 244 conditions, 106 events. 25/106 cut-off events. For 85/85 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 152 event pairs, 4 based on Foata normal form. 6/110 useless extension candidates. Maximal degree in co-relation 220. Up to 27 conditions per place. [2025-04-29 11:26:38,223 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 24 selfloop transitions, 11 changer transitions 0/43 dead transitions. [2025-04-29 11:26:38,223 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 43 transitions, 223 flow [2025-04-29 11:26:38,224 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-29 11:26:38,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-29 11:26:38,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 143 transitions. [2025-04-29 11:26:38,225 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5836734693877551 [2025-04-29 11:26:38,225 INFO L175 Difference]: Start difference. First operand has 39 places, 31 transitions, 129 flow. Second operand 7 states and 143 transitions. [2025-04-29 11:26:38,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 43 transitions, 223 flow [2025-04-29 11:26:38,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 43 transitions, 200 flow, removed 7 selfloop flow, removed 4 redundant places. [2025-04-29 11:26:38,226 INFO L231 Difference]: Finished difference. Result has 45 places, 32 transitions, 156 flow [2025-04-29 11:26:38,226 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=106, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=20, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=156, PETRI_PLACES=45, PETRI_TRANSITIONS=32} [2025-04-29 11:26:38,227 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 9 predicate places. [2025-04-29 11:26:38,227 INFO L485 AbstractCegarLoop]: Abstraction has has 45 places, 32 transitions, 156 flow [2025-04-29 11:26:38,227 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 17.625) internal successors, (141), 8 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) [2025-04-29 11:26:38,227 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:38,227 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] [2025-04-29 11:26:38,233 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2025-04-29 11:26:38,430 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:38,431 INFO L403 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:38,431 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:38,431 INFO L85 PathProgramCache]: Analyzing trace with hash -430645749, now seen corresponding path program 1 times [2025-04-29 11:26:38,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-29 11:26:38,431 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [2104102737] [2025-04-29 11:26:38,431 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:38,431 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:38,431 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:38,433 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) [2025-04-29 11:26:38,434 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2025-04-29 11:26:38,461 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 21 statements into 1 equivalence classes. [2025-04-29 11:26:38,471 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 21 of 21 statements. [2025-04-29 11:26:38,472 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:38,472 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:38,475 INFO L256 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 11 conjuncts are in the unsatisfiable core [2025-04-29 11:26:38,476 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:38,481 INFO L354 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 [2025-04-29 11:26:38,570 INFO L354 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 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2025-04-29 11:26:38,587 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 12 treesize of output 8 [2025-04-29 11:26:38,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:38,630 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2025-04-29 11:26:38,630 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-29 11:26:38,630 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2104102737] [2025-04-29 11:26:38,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2104102737] provided 1 perfect and 0 imperfect interpolant sequences [2025-04-29 11:26:38,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2025-04-29 11:26:38,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2025-04-29 11:26:38,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774773864] [2025-04-29 11:26:38,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2025-04-29 11:26:38,630 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2025-04-29 11:26:38,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-29 11:26:38,631 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2025-04-29 11:26:38,631 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2025-04-29 11:26:38,731 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 35 [2025-04-29 11:26:38,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 45 places, 32 transitions, 156 flow. Second operand has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:38,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:38,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 35 [2025-04-29 11:26:38,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:38,880 INFO L116 PetriNetUnfolderBase]: 25/115 cut-off events. [2025-04-29 11:26:38,880 INFO L117 PetriNetUnfolderBase]: For 124/124 co-relation queries the response was YES. [2025-04-29 11:26:38,881 INFO L83 FinitePrefix]: Finished finitePrefix Result has 295 conditions, 115 events. 25/115 cut-off events. For 124/124 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 188 event pairs, 12 based on Foata normal form. 1/114 useless extension candidates. Maximal degree in co-relation 267. Up to 49 conditions per place. [2025-04-29 11:26:38,881 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 23 selfloop transitions, 5 changer transitions 6/43 dead transitions. [2025-04-29 11:26:38,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 43 transitions, 247 flow [2025-04-29 11:26:38,882 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2025-04-29 11:26:38,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2025-04-29 11:26:38,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 151 transitions. [2025-04-29 11:26:38,883 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5392857142857143 [2025-04-29 11:26:38,883 INFO L175 Difference]: Start difference. First operand has 45 places, 32 transitions, 156 flow. Second operand 8 states and 151 transitions. [2025-04-29 11:26:38,883 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 43 transitions, 247 flow [2025-04-29 11:26:38,885 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 43 transitions, 233 flow, removed 0 selfloop flow, removed 5 redundant places. [2025-04-29 11:26:38,885 INFO L231 Difference]: Finished difference. Result has 49 places, 33 transitions, 156 flow [2025-04-29 11:26:38,886 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=40, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=156, PETRI_PLACES=49, PETRI_TRANSITIONS=33} [2025-04-29 11:26:38,886 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 13 predicate places. [2025-04-29 11:26:38,886 INFO L485 AbstractCegarLoop]: Abstraction has has 49 places, 33 transitions, 156 flow [2025-04-29 11:26:38,886 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 17.285714285714285) internal successors, (121), 7 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:38,886 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:38,887 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:38,898 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2025-04-29 11:26:39,090 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:39,091 INFO L403 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:39,091 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:39,091 INFO L85 PathProgramCache]: Analyzing trace with hash 1558113374, now seen corresponding path program 1 times [2025-04-29 11:26:39,091 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-29 11:26:39,091 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [60001915] [2025-04-29 11:26:39,091 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2025-04-29 11:26:39,091 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:39,091 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:39,093 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) [2025-04-29 11:26:39,094 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2025-04-29 11:26:39,124 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 27 statements into 1 equivalence classes. [2025-04-29 11:26:39,139 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 27 of 27 statements. [2025-04-29 11:26:39,139 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:26:39,139 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:39,141 INFO L256 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 13 conjuncts are in the unsatisfiable core [2025-04-29 11:26:39,142 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:39,155 INFO L354 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 [2025-04-29 11:26:39,401 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-04-29 11:26:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:39,409 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:39,598 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:39,599 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-29 11:26:39,599 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60001915] [2025-04-29 11:26:39,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60001915] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:26:39,599 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-29 11:26:39,599 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2025-04-29 11:26:39,599 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129846404] [2025-04-29 11:26:39,599 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:39,599 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-29 11:26:39,600 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-29 11:26:39,600 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-29 11:26:39,600 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2025-04-29 11:26:39,933 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2025-04-29 11:26:39,934 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 33 transitions, 156 flow. Second operand has 14 states, 14 states have (on average 16.428571428571427) internal successors, (230), 14 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:39,934 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:39,934 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2025-04-29 11:26:39,934 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:40,210 INFO L116 PetriNetUnfolderBase]: 23/104 cut-off events. [2025-04-29 11:26:40,210 INFO L117 PetriNetUnfolderBase]: For 92/92 co-relation queries the response was YES. [2025-04-29 11:26:40,211 INFO L83 FinitePrefix]: Finished finitePrefix Result has 284 conditions, 104 events. 23/104 cut-off events. For 92/92 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 143 event pairs, 6 based on Foata normal form. 2/104 useless extension candidates. Maximal degree in co-relation 269. Up to 29 conditions per place. [2025-04-29 11:26:40,211 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 25 selfloop transitions, 11 changer transitions 0/43 dead transitions. [2025-04-29 11:26:40,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 56 places, 43 transitions, 250 flow [2025-04-29 11:26:40,213 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2025-04-29 11:26:40,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2025-04-29 11:26:40,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 174 transitions. [2025-04-29 11:26:40,214 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.49714285714285716 [2025-04-29 11:26:40,214 INFO L175 Difference]: Start difference. First operand has 49 places, 33 transitions, 156 flow. Second operand 10 states and 174 transitions. [2025-04-29 11:26:40,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 56 places, 43 transitions, 250 flow [2025-04-29 11:26:40,215 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 43 transitions, 245 flow, removed 1 selfloop flow, removed 3 redundant places. [2025-04-29 11:26:40,215 INFO L231 Difference]: Finished difference. Result has 54 places, 33 transitions, 173 flow [2025-04-29 11:26:40,215 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=44, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=22, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=173, PETRI_PLACES=54, PETRI_TRANSITIONS=33} [2025-04-29 11:26:40,216 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 18 predicate places. [2025-04-29 11:26:40,216 INFO L485 AbstractCegarLoop]: Abstraction has has 54 places, 33 transitions, 173 flow [2025-04-29 11:26:40,216 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 16.428571428571427) internal successors, (230), 14 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:40,216 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:40,216 INFO L206 CegarLoopForPetriNet]: trace histogram [3, 3, 3, 3, 3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:40,225 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2025-04-29 11:26:40,421 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:40,421 INFO L403 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:40,421 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:40,421 INFO L85 PathProgramCache]: Analyzing trace with hash 537787717, now seen corresponding path program 2 times [2025-04-29 11:26:40,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-29 11:26:40,422 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [499879899] [2025-04-29 11:26:40,422 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:26:40,422 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:40,422 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:40,424 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) [2025-04-29 11:26:40,425 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2025-04-29 11:26:40,456 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 33 statements into 2 equivalence classes. [2025-04-29 11:26:40,475 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 33 of 33 statements. [2025-04-29 11:26:40,475 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 11:26:40,475 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:40,480 INFO L256 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-29 11:26:40,483 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:40,510 INFO L354 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 [2025-04-29 11:26:40,957 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 33 treesize of output 17 [2025-04-29 11:26:40,967 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:40,968 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:41,225 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 0 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:41,226 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-29 11:26:41,226 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499879899] [2025-04-29 11:26:41,226 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499879899] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:26:41,226 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-29 11:26:41,226 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2025-04-29 11:26:41,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314106914] [2025-04-29 11:26:41,226 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:41,226 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2025-04-29 11:26:41,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-29 11:26:41,227 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2025-04-29 11:26:41,227 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2025-04-29 11:26:41,774 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2025-04-29 11:26:41,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 33 transitions, 173 flow. Second operand has 16 states, 16 states have (on average 16.5) internal successors, (264), 16 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:41,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:41,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2025-04-29 11:26:41,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:42,416 INFO L116 PetriNetUnfolderBase]: 30/129 cut-off events. [2025-04-29 11:26:42,416 INFO L117 PetriNetUnfolderBase]: For 188/188 co-relation queries the response was YES. [2025-04-29 11:26:42,416 INFO L83 FinitePrefix]: Finished finitePrefix Result has 394 conditions, 129 events. 30/129 cut-off events. For 188/188 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 185 event pairs, 4 based on Foata normal form. 4/129 useless extension candidates. Maximal degree in co-relation 359. Up to 24 conditions per place. [2025-04-29 11:26:42,417 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 31 selfloop transitions, 16 changer transitions 0/54 dead transitions. [2025-04-29 11:26:42,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 54 transitions, 357 flow [2025-04-29 11:26:42,417 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2025-04-29 11:26:42,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2025-04-29 11:26:42,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 245 transitions. [2025-04-29 11:26:42,418 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5 [2025-04-29 11:26:42,418 INFO L175 Difference]: Start difference. First operand has 54 places, 33 transitions, 173 flow. Second operand 14 states and 245 transitions. [2025-04-29 11:26:42,418 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 54 transitions, 357 flow [2025-04-29 11:26:42,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 54 transitions, 319 flow, removed 10 selfloop flow, removed 9 redundant places. [2025-04-29 11:26:42,420 INFO L231 Difference]: Finished difference. Result has 63 places, 39 transitions, 243 flow [2025-04-29 11:26:42,420 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=137, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=19, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=243, PETRI_PLACES=63, PETRI_TRANSITIONS=39} [2025-04-29 11:26:42,421 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 27 predicate places. [2025-04-29 11:26:42,421 INFO L485 AbstractCegarLoop]: Abstraction has has 63 places, 39 transitions, 243 flow [2025-04-29 11:26:42,421 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 16.5) internal successors, (264), 16 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:42,421 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:42,421 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:42,428 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2025-04-29 11:26:42,621 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:42,622 INFO L403 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:42,622 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:42,622 INFO L85 PathProgramCache]: Analyzing trace with hash -1029623679, now seen corresponding path program 2 times [2025-04-29 11:26:42,622 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-29 11:26:42,623 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [599537517] [2025-04-29 11:26:42,623 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:26:42,623 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:42,623 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:42,624 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) [2025-04-29 11:26:42,626 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2025-04-29 11:26:42,656 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 35 statements into 2 equivalence classes. [2025-04-29 11:26:42,679 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) and asserted 35 of 35 statements. [2025-04-29 11:26:42,679 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2025-04-29 11:26:42,679 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:42,682 INFO L256 TraceCheckSpWp]: Trace formula consists of 121 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-29 11:26:42,683 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:42,698 INFO L325 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-04-29 11:26:42,698 INFO L354 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 [2025-04-29 11:26:43,092 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:43,092 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 0 proven. 44 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:43,739 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-29 11:26:43,739 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [599537517] [2025-04-29 11:26:43,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [599537517] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:26:43,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-29 11:26:43,739 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9] total 17 [2025-04-29 11:26:43,739 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385057195] [2025-04-29 11:26:43,739 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:43,740 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2025-04-29 11:26:43,740 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-29 11:26:43,740 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2025-04-29 11:26:43,740 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2025-04-29 11:26:44,525 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 35 [2025-04-29 11:26:44,525 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 39 transitions, 243 flow. Second operand has 19 states, 19 states have (on average 14.631578947368421) internal successors, (278), 19 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:44,525 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:44,525 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 35 [2025-04-29 11:26:44,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:46,176 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.10s for a HTC check with result VALID. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [] [2025-04-29 11:26:46,752 INFO L116 PetriNetUnfolderBase]: 66/230 cut-off events. [2025-04-29 11:26:46,753 INFO L117 PetriNetUnfolderBase]: For 529/529 co-relation queries the response was YES. [2025-04-29 11:26:46,753 INFO L83 FinitePrefix]: Finished finitePrefix Result has 803 conditions, 230 events. 66/230 cut-off events. For 529/529 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 320 event pairs, 3 based on Foata normal form. 0/225 useless extension candidates. Maximal degree in co-relation 766. Up to 50 conditions per place. [2025-04-29 11:26:46,754 INFO L140 encePairwiseOnDemand]: 26/35 looper letters, 56 selfloop transitions, 26 changer transitions 0/87 dead transitions. [2025-04-29 11:26:46,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 80 places, 87 transitions, 682 flow [2025-04-29 11:26:46,754 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2025-04-29 11:26:46,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 18 states. [2025-04-29 11:26:46,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 303 transitions. [2025-04-29 11:26:46,755 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.48095238095238096 [2025-04-29 11:26:46,755 INFO L175 Difference]: Start difference. First operand has 63 places, 39 transitions, 243 flow. Second operand 18 states and 303 transitions. [2025-04-29 11:26:46,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 80 places, 87 transitions, 682 flow [2025-04-29 11:26:46,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 87 transitions, 669 flow, removed 0 selfloop flow, removed 7 redundant places. [2025-04-29 11:26:46,758 INFO L231 Difference]: Finished difference. Result has 81 places, 54 transitions, 480 flow [2025-04-29 11:26:46,758 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=230, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=39, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=24, PETRI_DIFFERENCE_SUBTRAHEND_STATES=18, PETRI_FLOW=480, PETRI_PLACES=81, PETRI_TRANSITIONS=54} [2025-04-29 11:26:46,759 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 45 predicate places. [2025-04-29 11:26:46,759 INFO L485 AbstractCegarLoop]: Abstraction has has 81 places, 54 transitions, 480 flow [2025-04-29 11:26:46,759 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 14.631578947368421) internal successors, (278), 19 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:46,759 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:46,759 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:46,766 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2025-04-29 11:26:46,960 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:46,960 INFO L403 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:46,960 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:46,960 INFO L85 PathProgramCache]: Analyzing trace with hash -1625869917, now seen corresponding path program 2 times [2025-04-29 11:26:46,961 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-29 11:26:46,961 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1166151657] [2025-04-29 11:26:46,961 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2025-04-29 11:26:46,961 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:46,961 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:46,963 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) [2025-04-29 11:26:46,963 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2025-04-29 11:26:46,998 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 partitioned 37 statements into 2 equivalence classes. [2025-04-29 11:26:47,007 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) and asserted 13 of 37 statements. [2025-04-29 11:26:47,007 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2025-04-29 11:26:47,007 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:47,008 INFO L256 TraceCheckSpWp]: Trace formula consists of 60 conjuncts, 10 conjuncts are in the unsatisfiable core [2025-04-29 11:26:47,009 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:47,033 INFO L325 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2025-04-29 11:26:47,033 INFO L354 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 [2025-04-29 11:26:47,281 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-04-29 11:26:47,281 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:47,556 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 44 trivial. 0 not checked. [2025-04-29 11:26:47,556 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-29 11:26:47,556 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166151657] [2025-04-29 11:26:47,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1166151657] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:26:47,556 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-29 11:26:47,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2025-04-29 11:26:47,557 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049966018] [2025-04-29 11:26:47,557 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:47,557 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2025-04-29 11:26:47,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-29 11:26:47,557 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2025-04-29 11:26:47,557 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2025-04-29 11:26:47,824 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2025-04-29 11:26:47,824 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 54 transitions, 480 flow. Second operand has 10 states, 10 states have (on average 16.8) internal successors, (168), 10 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:47,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:47,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2025-04-29 11:26:47,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:47,960 INFO L116 PetriNetUnfolderBase]: 58/213 cut-off events. [2025-04-29 11:26:47,960 INFO L117 PetriNetUnfolderBase]: For 1062/1062 co-relation queries the response was YES. [2025-04-29 11:26:47,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 832 conditions, 213 events. 58/213 cut-off events. For 1062/1062 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 271 event pairs, 2 based on Foata normal form. 12/225 useless extension candidates. Maximal degree in co-relation 785. Up to 95 conditions per place. [2025-04-29 11:26:47,961 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 24 selfloop transitions, 23 changer transitions 0/54 dead transitions. [2025-04-29 11:26:47,961 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 54 transitions, 535 flow [2025-04-29 11:26:47,962 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2025-04-29 11:26:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2025-04-29 11:26:47,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 106 transitions. [2025-04-29 11:26:47,963 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.5047619047619047 [2025-04-29 11:26:47,963 INFO L175 Difference]: Start difference. First operand has 81 places, 54 transitions, 480 flow. Second operand 6 states and 106 transitions. [2025-04-29 11:26:47,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 54 transitions, 535 flow [2025-04-29 11:26:47,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 54 transitions, 479 flow, removed 7 selfloop flow, removed 10 redundant places. [2025-04-29 11:26:47,966 INFO L231 Difference]: Finished difference. Result has 74 places, 51 transitions, 441 flow [2025-04-29 11:26:47,966 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=375, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=441, PETRI_PLACES=74, PETRI_TRANSITIONS=51} [2025-04-29 11:26:47,967 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 38 predicate places. [2025-04-29 11:26:47,967 INFO L485 AbstractCegarLoop]: Abstraction has has 74 places, 51 transitions, 441 flow [2025-04-29 11:26:47,967 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 16.8) internal successors, (168), 10 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:47,967 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:47,967 INFO L206 CegarLoopForPetriNet]: trace histogram [4, 4, 4, 4, 4, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:47,974 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2025-04-29 11:26:48,172 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:48,172 INFO L403 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:48,172 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:48,173 INFO L85 PathProgramCache]: Analyzing trace with hash 22151360, now seen corresponding path program 3 times [2025-04-29 11:26:48,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-29 11:26:48,173 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [1653511891] [2025-04-29 11:26:48,173 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-29 11:26:48,173 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:48,173 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:48,175 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) [2025-04-29 11:26:48,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2025-04-29 11:26:48,206 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 39 statements into 4 equivalence classes. [2025-04-29 11:26:48,236 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) and asserted 39 of 39 statements. [2025-04-29 11:26:48,236 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2025-04-29 11:26:48,236 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:48,239 INFO L256 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 15 conjuncts are in the unsatisfiable core [2025-04-29 11:26:48,240 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:48,252 INFO L354 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 [2025-04-29 11:26:48,579 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-04-29 11:26:48,586 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:48,586 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:48,899 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:48,899 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-29 11:26:48,899 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1653511891] [2025-04-29 11:26:48,899 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1653511891] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:26:48,899 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-29 11:26:48,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 17 [2025-04-29 11:26:48,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129663090] [2025-04-29 11:26:48,899 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:48,900 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2025-04-29 11:26:48,900 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-29 11:26:48,900 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2025-04-29 11:26:48,900 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=242, Unknown=0, NotChecked=0, Total=306 [2025-04-29 11:26:49,610 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2025-04-29 11:26:49,610 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 51 transitions, 441 flow. Second operand has 18 states, 18 states have (on average 16.5) internal successors, (297), 18 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:49,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:49,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2025-04-29 11:26:49,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:50,087 INFO L116 PetriNetUnfolderBase]: 51/204 cut-off events. [2025-04-29 11:26:50,087 INFO L117 PetriNetUnfolderBase]: For 839/839 co-relation queries the response was YES. [2025-04-29 11:26:50,088 INFO L83 FinitePrefix]: Finished finitePrefix Result has 798 conditions, 204 events. 51/204 cut-off events. For 839/839 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 257 event pairs, 13 based on Foata normal form. 2/206 useless extension candidates. Maximal degree in co-relation 751. Up to 56 conditions per place. [2025-04-29 11:26:50,089 INFO L140 encePairwiseOnDemand]: 29/35 looper letters, 34 selfloop transitions, 18 changer transitions 0/63 dead transitions. [2025-04-29 11:26:50,089 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 63 transitions, 564 flow [2025-04-29 11:26:50,090 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2025-04-29 11:26:50,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2025-04-29 11:26:50,091 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 224 transitions. [2025-04-29 11:26:50,091 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.49230769230769234 [2025-04-29 11:26:50,091 INFO L175 Difference]: Start difference. First operand has 74 places, 51 transitions, 441 flow. Second operand 13 states and 224 transitions. [2025-04-29 11:26:50,091 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 63 transitions, 564 flow [2025-04-29 11:26:50,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 82 places, 63 transitions, 534 flow, removed 0 selfloop flow, removed 4 redundant places. [2025-04-29 11:26:50,094 INFO L231 Difference]: Finished difference. Result has 83 places, 50 transitions, 438 flow [2025-04-29 11:26:50,094 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=398, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=50, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=438, PETRI_PLACES=83, PETRI_TRANSITIONS=50} [2025-04-29 11:26:50,094 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 47 predicate places. [2025-04-29 11:26:50,094 INFO L485 AbstractCegarLoop]: Abstraction has has 83 places, 50 transitions, 438 flow [2025-04-29 11:26:50,095 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 16.5) internal successors, (297), 18 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:50,095 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:50,095 INFO L206 CegarLoopForPetriNet]: trace histogram [6, 6, 6, 6, 6, 5, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:50,102 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2025-04-29 11:26:50,295 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:50,295 INFO L403 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:50,296 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:50,296 INFO L85 PathProgramCache]: Analyzing trace with hash -931380468, now seen corresponding path program 4 times [2025-04-29 11:26:50,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-29 11:26:50,296 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [675179603] [2025-04-29 11:26:50,296 INFO L95 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2025-04-29 11:26:50,296 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:50,296 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:50,299 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) [2025-04-29 11:26:50,300 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2025-04-29 11:26:50,334 INFO L108 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST partitioned 51 statements into 2 equivalence classes. [2025-04-29 11:26:50,388 INFO L111 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) and asserted 51 of 51 statements. [2025-04-29 11:26:50,388 INFO L114 AnnotateAndAsserter]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 2 check-sat command(s) [2025-04-29 11:26:50,388 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:50,392 INFO L256 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 17 conjuncts are in the unsatisfiable core [2025-04-29 11:26:50,394 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:50,404 INFO L354 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 [2025-04-29 11:26:50,888 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-04-29 11:26:50,896 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:50,896 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:51,335 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 0 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:51,335 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-29 11:26:51,335 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [675179603] [2025-04-29 11:26:51,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [675179603] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:26:51,335 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-29 11:26:51,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 21 [2025-04-29 11:26:51,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [20519258] [2025-04-29 11:26:51,335 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:51,336 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2025-04-29 11:26:51,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-29 11:26:51,336 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2025-04-29 11:26:51,336 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=376, Unknown=0, NotChecked=0, Total=462 [2025-04-29 11:26:52,268 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2025-04-29 11:26:52,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 83 places, 50 transitions, 438 flow. Second operand has 22 states, 22 states have (on average 16.636363636363637) internal successors, (366), 22 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:52,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:52,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2025-04-29 11:26:52,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:54,093 INFO L116 PetriNetUnfolderBase]: 51/238 cut-off events. [2025-04-29 11:26:54,093 INFO L117 PetriNetUnfolderBase]: For 1009/1009 co-relation queries the response was YES. [2025-04-29 11:26:54,094 INFO L83 FinitePrefix]: Finished finitePrefix Result has 963 conditions, 238 events. 51/238 cut-off events. For 1009/1009 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 294 event pairs, 4 based on Foata normal form. 10/248 useless extension candidates. Maximal degree in co-relation 915. Up to 45 conditions per place. [2025-04-29 11:26:54,095 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 52 selfloop transitions, 30 changer transitions 0/93 dead transitions. [2025-04-29 11:26:54,095 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 93 transitions, 835 flow [2025-04-29 11:26:54,095 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2025-04-29 11:26:54,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 28 states. [2025-04-29 11:26:54,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 479 transitions. [2025-04-29 11:26:54,097 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4887755102040816 [2025-04-29 11:26:54,097 INFO L175 Difference]: Start difference. First operand has 83 places, 50 transitions, 438 flow. Second operand 28 states and 479 transitions. [2025-04-29 11:26:54,097 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 93 transitions, 835 flow [2025-04-29 11:26:54,100 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 98 places, 93 transitions, 756 flow, removed 0 selfloop flow, removed 12 redundant places. [2025-04-29 11:26:54,102 INFO L231 Difference]: Finished difference. Result has 110 places, 58 transitions, 578 flow [2025-04-29 11:26:54,103 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=20, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=26, PETRI_DIFFERENCE_SUBTRAHEND_STATES=28, PETRI_FLOW=578, PETRI_PLACES=110, PETRI_TRANSITIONS=58} [2025-04-29 11:26:54,103 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 74 predicate places. [2025-04-29 11:26:54,104 INFO L485 AbstractCegarLoop]: Abstraction has has 110 places, 58 transitions, 578 flow [2025-04-29 11:26:54,104 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 16.636363636363637) internal successors, (366), 22 states have internal predecessors, (366), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:54,104 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:54,104 INFO L206 CegarLoopForPetriNet]: trace histogram [7, 7, 7, 7, 7, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:54,113 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2025-04-29 11:26:54,305 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:54,305 INFO L403 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:54,305 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:54,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1099022389, now seen corresponding path program 5 times [2025-04-29 11:26:54,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-29 11:26:54,306 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [45361574] [2025-04-29 11:26:54,306 INFO L95 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2025-04-29 11:26:54,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:54,306 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:54,308 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) [2025-04-29 11:26:54,309 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2025-04-29 11:26:54,345 INFO L108 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 partitioned 57 statements into 7 equivalence classes. [2025-04-29 11:26:54,426 INFO L111 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) and asserted 57 of 57 statements. [2025-04-29 11:26:54,426 INFO L114 AnnotateAndAsserter]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2025-04-29 11:26:54,426 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:54,430 INFO L256 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 18 conjuncts are in the unsatisfiable core [2025-04-29 11:26:54,432 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:54,442 INFO L354 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 [2025-04-29 11:26:55,001 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2025-04-29 11:26:55,011 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:55,011 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:26:55,587 INFO L134 CoverageAnalysis]: Checked inductivity of 126 backedges. 0 proven. 126 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2025-04-29 11:26:55,587 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-29 11:26:55,587 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [45361574] [2025-04-29 11:26:55,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [45361574] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:26:55,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-29 11:26:55,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 23 [2025-04-29 11:26:55,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1426746125] [2025-04-29 11:26:55,588 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-29 11:26:55,588 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2025-04-29 11:26:55,588 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-29 11:26:55,588 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2025-04-29 11:26:55,589 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=449, Unknown=0, NotChecked=0, Total=552 [2025-04-29 11:26:56,568 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 35 [2025-04-29 11:26:56,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 58 transitions, 578 flow. Second operand has 24 states, 24 states have (on average 16.625) internal successors, (399), 24 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:56,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:26:56,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 35 [2025-04-29 11:26:56,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:26:58,873 INFO L116 PetriNetUnfolderBase]: 54/267 cut-off events. [2025-04-29 11:26:58,873 INFO L117 PetriNetUnfolderBase]: For 1866/1866 co-relation queries the response was YES. [2025-04-29 11:26:58,874 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1181 conditions, 267 events. 54/267 cut-off events. For 1866/1866 co-relation queries the response was YES. Maximal size of possible extension queue 6. Compared 333 event pairs, 4 based on Foata normal form. 6/273 useless extension candidates. Maximal degree in co-relation 1121. Up to 50 conditions per place. [2025-04-29 11:26:58,874 INFO L140 encePairwiseOnDemand]: 27/35 looper letters, 57 selfloop transitions, 33 changer transitions 0/101 dead transitions. [2025-04-29 11:26:58,874 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 141 places, 101 transitions, 999 flow [2025-04-29 11:26:58,875 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2025-04-29 11:26:58,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 32 states. [2025-04-29 11:26:58,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 541 transitions. [2025-04-29 11:26:58,876 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4830357142857143 [2025-04-29 11:26:58,876 INFO L175 Difference]: Start difference. First operand has 110 places, 58 transitions, 578 flow. Second operand 32 states and 541 transitions. [2025-04-29 11:26:58,876 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 141 places, 101 transitions, 999 flow [2025-04-29 11:26:58,882 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 101 transitions, 927 flow, removed 9 selfloop flow, removed 16 redundant places. [2025-04-29 11:26:58,883 INFO L231 Difference]: Finished difference. Result has 131 places, 62 transitions, 669 flow [2025-04-29 11:26:58,883 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=501, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=32, PETRI_FLOW=669, PETRI_PLACES=131, PETRI_TRANSITIONS=62} [2025-04-29 11:26:58,884 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 95 predicate places. [2025-04-29 11:26:58,884 INFO L485 AbstractCegarLoop]: Abstraction has has 131 places, 62 transitions, 669 flow [2025-04-29 11:26:58,884 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 16.625) internal successors, (399), 24 states have internal predecessors, (399), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:26:58,885 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:26:58,885 INFO L206 CegarLoopForPetriNet]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:26:58,892 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2025-04-29 11:26:59,085 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:59,085 INFO L403 AbstractCegarLoop]: === Iteration 16 === Targeting thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:26:59,086 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:26:59,086 INFO L85 PathProgramCache]: Analyzing trace with hash -356638563, now seen corresponding path program 3 times [2025-04-29 11:26:59,086 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-29 11:26:59,086 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [648286286] [2025-04-29 11:26:59,086 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2025-04-29 11:26:59,086 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:26:59,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:26:59,088 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) [2025-04-29 11:26:59,088 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2025-04-29 11:26:59,119 INFO L108 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 partitioned 59 statements into 9 equivalence classes. [2025-04-29 11:26:59,130 INFO L111 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) and asserted 17 of 59 statements. [2025-04-29 11:26:59,130 INFO L114 AnnotateAndAsserter]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2025-04-29 11:26:59,130 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is unsat [2025-04-29 11:26:59,131 INFO L256 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 16 conjuncts are in the unsatisfiable core [2025-04-29 11:26:59,133 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2025-04-29 11:26:59,160 INFO L325 Elim1Store]: treesize reduction 6, result has 40.0 percent of original size [2025-04-29 11:26:59,160 INFO L354 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 13 treesize of output 13 [2025-04-29 11:26:59,164 INFO L354 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 12 treesize of output 14 [2025-04-29 11:26:59,808 INFO L325 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2025-04-29 11:26:59,808 INFO L354 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 17 treesize of output 17 [2025-04-29 11:26:59,927 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2025-04-29 11:26:59,927 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2025-04-29 11:27:00,758 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 154 trivial. 0 not checked. [2025-04-29 11:27:00,758 INFO L136 FreeRefinementEngine]: Strategy FOX found an infeasible trace [2025-04-29 11:27:00,758 INFO L324 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648286286] [2025-04-29 11:27:00,758 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [648286286] provided 0 perfect and 2 imperfect interpolant sequences [2025-04-29 11:27:00,759 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2025-04-29 11:27:00,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2025-04-29 11:27:00,759 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105344176] [2025-04-29 11:27:00,759 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2025-04-29 11:27:00,759 INFO L562 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2025-04-29 11:27:00,759 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy FOX [2025-04-29 11:27:00,759 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2025-04-29 11:27:00,759 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2025-04-29 11:27:05,022 WARN L532 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, BitVec], hasArrays=true, hasNonlinArith=false, quantifiers [1] [2025-04-29 11:27:05,929 INFO L464 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 35 [2025-04-29 11:27:05,930 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 62 transitions, 669 flow. Second operand has 14 states, 14 states have (on average 12.714285714285714) internal successors, (178), 14 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:27:05,930 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2025-04-29 11:27:05,930 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 35 [2025-04-29 11:27:05,930 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2025-04-29 11:27:06,829 INFO L116 PetriNetUnfolderBase]: 99/300 cut-off events. [2025-04-29 11:27:06,829 INFO L117 PetriNetUnfolderBase]: For 1740/1740 co-relation queries the response was YES. [2025-04-29 11:27:06,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1335 conditions, 300 events. 99/300 cut-off events. For 1740/1740 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 328 event pairs, 2 based on Foata normal form. 12/312 useless extension candidates. Maximal degree in co-relation 1269. Up to 212 conditions per place. [2025-04-29 11:27:06,831 INFO L140 encePairwiseOnDemand]: 28/35 looper letters, 35 selfloop transitions, 30 changer transitions 0/67 dead transitions. [2025-04-29 11:27:06,831 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 135 places, 67 transitions, 789 flow [2025-04-29 11:27:06,832 INFO L140 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2025-04-29 11:27:06,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2025-04-29 11:27:06,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 101 transitions. [2025-04-29 11:27:06,833 INFO L509 CegarLoopForPetriNet]: DFA transition density 0.4122448979591837 [2025-04-29 11:27:06,833 INFO L175 Difference]: Start difference. First operand has 131 places, 62 transitions, 669 flow. Second operand 7 states and 101 transitions. [2025-04-29 11:27:06,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 135 places, 67 transitions, 789 flow [2025-04-29 11:27:06,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 67 transitions, 699 flow, removed 12 selfloop flow, removed 29 redundant places. [2025-04-29 11:27:06,839 INFO L231 Difference]: Finished difference. Result has 106 places, 60 transitions, 613 flow [2025-04-29 11:27:06,840 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=35, PETRI_DIFFERENCE_MINUEND_FLOW=553, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=613, PETRI_PLACES=106, PETRI_TRANSITIONS=60} [2025-04-29 11:27:06,840 INFO L279 CegarLoopForPetriNet]: 36 programPoint places, 70 predicate places. [2025-04-29 11:27:06,840 INFO L485 AbstractCegarLoop]: Abstraction has has 106 places, 60 transitions, 613 flow [2025-04-29 11:27:06,841 INFO L486 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 12.714285714285714) internal successors, (178), 14 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2025-04-29 11:27:06,841 INFO L198 CegarLoopForPetriNet]: Found error trace [2025-04-29 11:27:06,841 INFO L206 CegarLoopForPetriNet]: trace histogram [8, 8, 8, 8, 8, 7, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2025-04-29 11:27:06,847 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2025-04-29 11:27:07,041 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:27:07,041 INFO L403 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE, thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 14 more)] === [2025-04-29 11:27:07,042 INFO L155 PredicateUnifier]: Initialized classic predicate unifier [2025-04-29 11:27:07,042 INFO L85 PathProgramCache]: Analyzing trace with hash -218004772, now seen corresponding path program 6 times [2025-04-29 11:27:07,042 INFO L118 FreeRefinementEngine]: Executing refinement strategy FOX [2025-04-29 11:27:07,042 INFO L324 FreeRefinementEngine]: Using trace check IpTcStrategyModuleZ3 [277860713] [2025-04-29 11:27:07,042 INFO L95 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2025-04-29 11:27:07,042 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:27:07,042 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2025-04-29 11:27:07,044 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) [2025-04-29 11:27:07,045 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2025-04-29 11:27:07,080 INFO L108 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE partitioned 63 statements into 8 equivalence classes. [2025-04-29 11:27:07,228 INFO L111 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) and asserted 63 of 63 statements. [2025-04-29 11:27:07,228 INFO L114 AnnotateAndAsserter]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2025-04-29 11:27:07,228 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-29 11:27:07,228 INFO L348 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2025-04-29 11:27:07,242 INFO L108 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY partitioned 63 statements into 1 equivalence classes. [2025-04-29 11:27:07,811 INFO L111 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) and asserted 63 of 63 statements. [2025-04-29 11:27:07,811 INFO L114 AnnotateAndAsserter]: Assert order NOT_INCREMENTALLY issued 1 check-sat command(s) [2025-04-29 11:27:07,811 INFO L115 AnnotateAndAsserter]: Conjunction of SSA is sat [2025-04-29 11:27:07,851 INFO L130 FreeRefinementEngine]: Strategy FOX found a feasible trace [2025-04-29 11:27:07,851 INFO L340 BasicCegarLoop]: Counterexample is feasible [2025-04-29 11:27:07,852 INFO L790 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (16 of 17 remaining) [2025-04-29 11:27:07,853 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 17 remaining) [2025-04-29 11:27:07,853 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 17 remaining) [2025-04-29 11:27:07,853 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 17 remaining) [2025-04-29 11:27:07,853 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (12 of 17 remaining) [2025-04-29 11:27:07,853 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 17 remaining) [2025-04-29 11:27:07,853 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 17 remaining) [2025-04-29 11:27:07,853 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 17 remaining) [2025-04-29 11:27:07,853 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 17 remaining) [2025-04-29 11:27:07,853 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (7 of 17 remaining) [2025-04-29 11:27:07,854 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 17 remaining) [2025-04-29 11:27:07,854 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err0ASSERT_VIOLATIONMEMORY_DEREFERENCE (5 of 17 remaining) [2025-04-29 11:27:07,854 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err1ASSERT_VIOLATIONMEMORY_DEREFERENCE (4 of 17 remaining) [2025-04-29 11:27:07,854 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err2ASSERT_VIOLATIONMEMORY_DEREFERENCE (3 of 17 remaining) [2025-04-29 11:27:07,854 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err3ASSERT_VIOLATIONMEMORY_DEREFERENCE (2 of 17 remaining) [2025-04-29 11:27:07,854 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 17 remaining) [2025-04-29 11:27:07,854 INFO L790 garLoopResultBuilder]: Registering result UNKNOWN for location thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (0 of 17 remaining) [2025-04-29 11:27:07,866 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2025-04-29 11:27:08,055 WARN L466 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2025-04-29 11:27:08,055 INFO L422 BasicCegarLoop]: Path program histogram: [6, 3, 2, 1, 1, 1, 1, 1, 1] [2025-04-29 11:27:08,110 INFO L242 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2025-04-29 11:27:08,110 INFO L171 ceAbstractionStarter]: Computing trace abstraction results [2025-04-29 11:27:08,113 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.04 11:27:08 BasicIcfg [2025-04-29 11:27:08,113 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2025-04-29 11:27:08,114 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2025-04-29 11:27:08,114 INFO L270 PluginConnector]: Initializing Witness Printer... [2025-04-29 11:27:08,114 INFO L274 PluginConnector]: Witness Printer initialized [2025-04-29 11:27:08,114 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.04 11:26:34" (3/4) ... [2025-04-29 11:27:08,116 INFO L149 WitnessPrinter]: No result that supports witness generation found [2025-04-29 11:27:08,116 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2025-04-29 11:27:08,117 INFO L158 Benchmark]: Toolchain (without parser) took 34616.35ms. Allocated memory was 117.4MB in the beginning and 218.1MB in the end (delta: 100.7MB). Free memory was 91.3MB in the beginning and 171.6MB in the end (delta: -80.4MB). Peak memory consumption was 23.5MB. Max. memory is 16.1GB. [2025-04-29 11:27:08,117 INFO L158 Benchmark]: CDTParser took 1.70ms. Allocated memory is still 83.9MB. Free memory was 61.6MB in the beginning and 61.5MB in the end (delta: 18.6kB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-29 11:27:08,117 INFO L158 Benchmark]: CACSL2BoogieTranslator took 196.95ms. Allocated memory is still 117.4MB. Free memory was 91.3MB in the beginning and 76.8MB in the end (delta: 14.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2025-04-29 11:27:08,117 INFO L158 Benchmark]: Boogie Procedure Inliner took 32.73ms. Allocated memory is still 117.4MB. Free memory was 76.8MB in the beginning and 75.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-29 11:27:08,117 INFO L158 Benchmark]: Boogie Preprocessor took 42.76ms. Allocated memory is still 117.4MB. Free memory was 75.2MB in the beginning and 73.4MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. [2025-04-29 11:27:08,117 INFO L158 Benchmark]: RCFGBuilder took 492.02ms. Allocated memory is still 117.4MB. Free memory was 73.2MB in the beginning and 44.3MB in the end (delta: 28.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. [2025-04-29 11:27:08,118 INFO L158 Benchmark]: TraceAbstraction took 33836.36ms. Allocated memory was 117.4MB in the beginning and 218.1MB in the end (delta: 100.7MB). Free memory was 89.4MB in the beginning and 171.6MB in the end (delta: -82.2MB). Peak memory consumption was 120.0MB. Max. memory is 16.1GB. [2025-04-29 11:27:08,118 INFO L158 Benchmark]: Witness Printer took 2.46ms. Allocated memory is still 218.1MB. Free memory was 171.6MB in the beginning and 171.6MB in the end (delta: 19.6kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. [2025-04-29 11:27:08,119 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.70ms. Allocated memory is still 83.9MB. Free memory was 61.6MB in the beginning and 61.5MB in the end (delta: 18.6kB). There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 196.95ms. Allocated memory is still 117.4MB. Free memory was 91.3MB in the beginning and 76.8MB in the end (delta: 14.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 32.73ms. Allocated memory is still 117.4MB. Free memory was 76.8MB in the beginning and 75.2MB in the end (delta: 1.6MB). There was no memory consumed. Max. memory is 16.1GB. * Boogie Preprocessor took 42.76ms. Allocated memory is still 117.4MB. Free memory was 75.2MB in the beginning and 73.4MB in the end (delta: 1.8MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 492.02ms. Allocated memory is still 117.4MB. Free memory was 73.2MB in the beginning and 44.3MB in the end (delta: 28.9MB). Peak memory consumption was 25.2MB. Max. memory is 16.1GB. * TraceAbstraction took 33836.36ms. Allocated memory was 117.4MB in the beginning and 218.1MB in the end (delta: 100.7MB). Free memory was 89.4MB in the beginning and 171.6MB in the end (delta: -82.2MB). Peak memory consumption was 120.0MB. Max. memory is 16.1GB. * Witness Printer took 2.46ms. Allocated memory is still 218.1MB. Free memory was 171.6MB in the beginning and 171.6MB in the end (delta: 19.6kB). Peak memory consumption was 8.4MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - UnprovableResult [Line: 34]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of memtrack at line 34. Possible FailurePath: [L19] 0 char *v; [L36] 0 pthread_t t1, t2; [L38] FCALL, FORK 0 pthread_create(&t1, 0, thread1, 0) VAL [\at(arg, Pre)={0:0}, t1=0, v={0:0}] [L23] 1 v = malloc(sizeof(char) * 8) [L24] 1 return 0; [L39] FCALL, JOIN 1 pthread_join(t1, 0) VAL [\at(arg, Pre)={0:0}, \result={0:0}, arg={0:0}, t1=0, v={2:0}] [L41] FCALL, FORK 0 pthread_create(&t2, 0, thread2, 0) VAL [\at(arg, Pre)={0:0}, \result={0:0}, arg={0:0}, t1=0, t2=1, v={2:0}] [L29] COND TRUE 2 \read(*v) [L29] FCALL 2 strcpy(v, "Bigshot") [L30] 2 return 0; [L42] FCALL, JOIN 2 pthread_join(t2, 0) VAL [\at(arg, Pre)={0:0}, \result={0:0}, arg={0:0}, t1=0, t2=1, v={2:0}] [L44] EXPR 0 v[0] [L44] CALL 0 __VERIFIER_assert(v[0] == 'B') [L17] COND FALSE 0 !(!expression) [L44] RET 0 __VERIFIER_assert(v[0] == 'B') [L46] 0 return 0; VAL [\at(arg, Pre)={0:0}, \result=0, \result={0:0}, arg={0:0}, t1=0, t2=1, v={2:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 38]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - UnprovableResult [Line: 41]: Unable to prove that petrification did provide enough thread instances (tool internal message) Unable to prove that petrification did provide enough thread instances (tool internal message) Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 54 locations, 59 edges, 17 error locations. Started 1 CEGAR loops. EmptinessCheckTime: 0.0s, RemoveRedundantFlowTime: 0.0s, RemoveRedundantFlowUnfoldingTime: 0.0s, BackfoldingTime: 0.0s, BackfoldingUnfoldingTime: 0.0s, FlowIncreaseByBackfolding: 0, BasicCegarLoop: OverallTime: 33.7s, OverallIterations: 17, TraceHistogramMax: 9, PathProgramHistogramMax: 6, EmptinessCheckTime: 0.0s, AutomataDifference: 20.1s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 2580 SdHoareTripleChecker+Valid, 14.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 2273 mSDsluCounter, 1901 SdHoareTripleChecker+Invalid, 13.6s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 1814 mSDsCounter, 89 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 8989 IncrementalHoareTripleChecker+Invalid, 9079 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 89 mSolverCounterUnsat, 87 mSDtfsCounter, 8989 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 915 GetRequests, 649 SyntacticMatches, 3 SemanticMatches, 263 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1573 ImplicationChecksByTransitivity, 6.9s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=669occurred in iteration=15, InterpolantAutomatonStates: 171, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: No data available, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.5s SatisfiabilityAnalysisTime, 8.2s InterpolantComputationTime, 517 NumberOfCodeBlocks, 451 NumberOfCodeBlocksAsserted, 37 NumberOfCheckSat, 802 ConstructedInterpolants, 107 QuantifiedInterpolants, 14877 SizeOfPredicates, 83 NumberOfNonLiveVariables, 1487 ConjunctsInSsa, 176 ConjunctsInUnsatCore, 26 InterpolantComputations, 6 PerfectInterpolantSequences, 396/1066 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available, ConComCheckerStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2025-04-29 11:27:08,153 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: UNKNOWN: Overapproximated counterexample