./Ultimate.py --spec /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/properties/valid-memsafety.prp --file /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 84cfde4a Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i -s /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-clean/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 af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 --- Real Ultimate output --- This is Ultimate 0.2.5-dev-84cfde4 [2024-10-11 19:47:23,832 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-11 19:47:23,915 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-11 19:47:23,921 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-11 19:47:23,921 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-11 19:47:23,943 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-11 19:47:23,945 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-11 19:47:23,946 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-11 19:47:23,946 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-11 19:47:23,948 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-11 19:47:23,948 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-11 19:47:23,948 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-11 19:47:23,949 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-11 19:47:23,949 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-11 19:47:23,951 INFO L153 SettingsManager]: * Use SBE=true [2024-10-11 19:47:23,952 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-11 19:47:23,952 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-11 19:47:23,952 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-11 19:47:23,952 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-11 19:47:23,953 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-11 19:47:23,953 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-11 19:47:23,954 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-11 19:47:23,954 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-11 19:47:23,954 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-11 19:47:23,955 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-11 19:47:23,955 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-11 19:47:23,955 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-11 19:47:23,956 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-11 19:47:23,956 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-11 19:47:23,956 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-11 19:47:23,957 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-11 19:47:23,957 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-11 19:47:23,957 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-11 19:47:23,957 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:47:23,958 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-11 19:47:23,958 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-11 19:47:23,958 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-11 19:47:23,959 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-11 19:47:23,959 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-11 19:47:23,959 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-11 19:47:23,960 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-11 19:47:23,960 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-11 19:47:23,960 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> af00d5f4cc6a18cb9fd8a5151467217fe3ddb5ee0fa30b2cfbd9dd374105ee15 [2024-10-11 19:47:24,227 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-11 19:47:24,254 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-11 19:47:24,258 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-11 19:47:24,259 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-11 19:47:24,260 INFO L274 PluginConnector]: CDTParser initialized [2024-10-11 19:47:24,261 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2024-10-11 19:47:25,739 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-11 19:47:26,030 INFO L384 CDTParser]: Found 1 translation units. [2024-10-11 19:47:26,033 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/goblint-regression/28-race_reach_41-trylock_racefree.i [2024-10-11 19:47:26,049 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/471964fd6/56a949a1e09f4d6e8f3d532174c30fb6/FLAG455d3e4c6 [2024-10-11 19:47:26,313 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/data/471964fd6/56a949a1e09f4d6e8f3d532174c30fb6 [2024-10-11 19:47:26,316 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-11 19:47:26,318 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-11 19:47:26,319 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-11 19:47:26,319 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-11 19:47:26,328 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-11 19:47:26,329 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:47:26" (1/1) ... [2024-10-11 19:47:26,330 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@78c522ed and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:26, skipping insertion in model container [2024-10-11 19:47:26,330 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.10 07:47:26" (1/1) ... [2024-10-11 19:47:26,389 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-11 19:47:26,784 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:47:26,798 INFO L200 MainTranslator]: Completed pre-run [2024-10-11 19:47:26,859 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-11 19:47:26,936 INFO L204 MainTranslator]: Completed translation [2024-10-11 19:47:26,936 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:26 WrapperNode [2024-10-11 19:47:26,937 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-11 19:47:26,938 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-11 19:47:26,938 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-11 19:47:26,942 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-11 19:47:26,950 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:26" (1/1) ... [2024-10-11 19:47:26,994 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:26" (1/1) ... [2024-10-11 19:47:27,018 INFO L138 Inliner]: procedures = 172, calls = 36, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 83 [2024-10-11 19:47:27,020 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-11 19:47:27,021 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-11 19:47:27,021 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-11 19:47:27,021 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-11 19:47:27,033 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:26" (1/1) ... [2024-10-11 19:47:27,037 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:26" (1/1) ... [2024-10-11 19:47:27,040 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:26" (1/1) ... [2024-10-11 19:47:27,068 INFO L175 MemorySlicer]: Split 14 memory accesses to 4 slices as follows [2, 5, 5, 2]. 36 percent of accesses are in the largest equivalence class. The 12 initializations are split as follows [2, 5, 5, 0]. The 1 writes are split as follows [0, 0, 0, 1]. [2024-10-11 19:47:27,068 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:26" (1/1) ... [2024-10-11 19:47:27,068 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:26" (1/1) ... [2024-10-11 19:47:27,075 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:26" (1/1) ... [2024-10-11 19:47:27,079 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:26" (1/1) ... [2024-10-11 19:47:27,081 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:26" (1/1) ... [2024-10-11 19:47:27,082 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:26" (1/1) ... [2024-10-11 19:47:27,087 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-11 19:47:27,088 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-11 19:47:27,088 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-11 19:47:27,088 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-11 19:47:27,089 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:26" (1/1) ... [2024-10-11 19:47:27,099 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-11 19:47:27,110 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:47:27,129 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-11 19:47:27,132 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-11 19:47:27,182 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-11 19:47:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-11 19:47:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-10-11 19:47:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-10-11 19:47:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-11 19:47:27,183 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-11 19:47:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-10-11 19:47:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-10-11 19:47:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexLock [2024-10-11 19:47:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-11 19:47:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-10-11 19:47:27,184 INFO L130 BoogieDeclarations]: Found specification of procedure t_fun [2024-10-11 19:47:27,184 INFO L138 BoogieDeclarations]: Found implementation of procedure t_fun [2024-10-11 19:47:27,185 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-10-11 19:47:27,185 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexTryLock [2024-10-11 19:47:27,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-11 19:47:27,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-11 19:47:27,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-10-11 19:47:27,185 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-10-11 19:47:27,186 INFO L130 BoogieDeclarations]: Found specification of procedure #PthreadsMutexUnlock [2024-10-11 19:47:27,186 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-11 19:47:27,186 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-11 19:47:27,188 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-11 19:47:27,314 INFO L238 CfgBuilder]: Building ICFG [2024-10-11 19:47:27,316 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-11 19:47:27,564 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-11 19:47:27,565 INFO L287 CfgBuilder]: Performing block encoding [2024-10-11 19:47:27,717 INFO L309 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-11 19:47:27,718 INFO L314 CfgBuilder]: Removed 11 assume(true) statements. [2024-10-11 19:47:27,718 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:47:27 BoogieIcfgContainer [2024-10-11 19:47:27,718 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-11 19:47:27,722 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-11 19:47:27,723 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-11 19:47:27,727 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-11 19:47:27,727 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.10 07:47:26" (1/3) ... [2024-10-11 19:47:27,730 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f1a24b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:47:27, skipping insertion in model container [2024-10-11 19:47:27,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.10 07:47:26" (2/3) ... [2024-10-11 19:47:27,731 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@16f1a24b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.10 07:47:27, skipping insertion in model container [2024-10-11 19:47:27,731 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.10 07:47:27" (3/3) ... [2024-10-11 19:47:27,732 INFO L112 eAbstractionObserver]: Analyzing ICFG 28-race_reach_41-trylock_racefree.i [2024-10-11 19:47:27,747 INFO L209 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-11 19:47:27,747 INFO L149 ceAbstractionStarter]: Applying trace abstraction to program that has 6 error locations. [2024-10-11 19:47:27,747 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-11 19:47:27,796 INFO L143 ThreadInstanceAdder]: Constructed 1 joinOtherThreadTransitions. [2024-10-11 19:47:27,827 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 52 places, 62 transitions, 131 flow [2024-10-11 19:47:27,862 INFO L124 PetriNetUnfolderBase]: 19/95 cut-off events. [2024-10-11 19:47:27,863 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-11 19:47:27,866 INFO L83 FinitePrefix]: Finished finitePrefix Result has 100 conditions, 95 events. 19/95 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 12. Compared 358 event pairs, 0 based on Foata normal form. 0/61 useless extension candidates. Maximal degree in co-relation 57. Up to 6 conditions per place. [2024-10-11 19:47:27,867 INFO L82 GeneralOperation]: Start removeDead. Operand has 52 places, 62 transitions, 131 flow [2024-10-11 19:47:27,871 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 52 places, 62 transitions, 131 flow [2024-10-11 19:47:27,882 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:47:27,891 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@55e9a93e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:47:27,892 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-10-11 19:47:27,895 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:47:27,896 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:47:27,896 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:47:27,896 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:27,897 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:47:27,897 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-11 19:47:27,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:27,904 INFO L85 PathProgramCache]: Analyzing trace with hash 342964, now seen corresponding path program 1 times [2024-10-11 19:47:27,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:27,918 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544404920] [2024-10-11 19:47:27,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:27,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:28,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:28,249 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:28,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:28,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544404920] [2024-10-11 19:47:28,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [544404920] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:47:28,251 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:47:28,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:47:28,254 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2107062828] [2024-10-11 19:47:28,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:47:28,264 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:47:28,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:28,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:47:28,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:47:28,314 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 18 out of 62 [2024-10-11 19:47:28,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 52 places, 62 transitions, 131 flow. Second operand has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:28,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:28,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 18 of 62 [2024-10-11 19:47:28,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:28,590 INFO L124 PetriNetUnfolderBase]: 156/469 cut-off events. [2024-10-11 19:47:28,590 INFO L125 PetriNetUnfolderBase]: For 1/1 co-relation queries the response was YES. [2024-10-11 19:47:28,592 INFO L83 FinitePrefix]: Finished finitePrefix Result has 818 conditions, 469 events. 156/469 cut-off events. For 1/1 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2311 event pairs, 126 based on Foata normal form. 98/537 useless extension candidates. Maximal degree in co-relation 760. Up to 303 conditions per place. [2024-10-11 19:47:28,596 INFO L140 encePairwiseOnDemand]: 47/62 looper letters, 36 selfloop transitions, 2 changer transitions 1/57 dead transitions. [2024-10-11 19:47:28,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 57 transitions, 199 flow [2024-10-11 19:47:28,600 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:47:28,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:47:28,609 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 112 transitions. [2024-10-11 19:47:28,613 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6021505376344086 [2024-10-11 19:47:28,615 INFO L175 Difference]: Start difference. First operand has 52 places, 62 transitions, 131 flow. Second operand 3 states and 112 transitions. [2024-10-11 19:47:28,616 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 57 transitions, 199 flow [2024-10-11 19:47:28,619 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 57 transitions, 199 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:47:28,622 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 105 flow [2024-10-11 19:47:28,624 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=103, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=48, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=105, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-10-11 19:47:28,628 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2024-10-11 19:47:28,628 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 105 flow [2024-10-11 19:47:28,629 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.0) internal successors, (57), 3 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:28,629 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:28,629 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:47:28,629 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-11 19:47:28,630 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-11 19:47:28,631 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:28,631 INFO L85 PathProgramCache]: Analyzing trace with hash 342965, now seen corresponding path program 1 times [2024-10-11 19:47:28,631 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:28,632 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727878282] [2024-10-11 19:47:28,632 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:28,632 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:28,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:28,818 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:28,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:28,819 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727878282] [2024-10-11 19:47:28,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727878282] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:47:28,820 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:47:28,821 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:47:28,821 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133397921] [2024-10-11 19:47:28,821 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:47:28,822 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:47:28,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:28,823 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:47:28,823 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:47:28,840 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 21 out of 62 [2024-10-11 19:47:28,842 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 105 flow. Second operand has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:28,842 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:28,842 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 21 of 62 [2024-10-11 19:47:28,842 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:28,980 INFO L124 PetriNetUnfolderBase]: 136/414 cut-off events. [2024-10-11 19:47:28,980 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-10-11 19:47:28,982 INFO L83 FinitePrefix]: Finished finitePrefix Result has 724 conditions, 414 events. 136/414 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 22. Compared 2181 event pairs, 0 based on Foata normal form. 1/376 useless extension candidates. Maximal degree in co-relation 688. Up to 280 conditions per place. [2024-10-11 19:47:28,987 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 36 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2024-10-11 19:47:28,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 57 transitions, 201 flow [2024-10-11 19:47:28,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:47:28,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:47:28,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 103 transitions. [2024-10-11 19:47:28,990 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.553763440860215 [2024-10-11 19:47:28,990 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 105 flow. Second operand 3 states and 103 transitions. [2024-10-11 19:47:28,990 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 57 transitions, 201 flow [2024-10-11 19:47:28,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 57 transitions, 197 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:47:28,994 INFO L231 Difference]: Finished difference. Result has 51 places, 47 transitions, 111 flow [2024-10-11 19:47:28,995 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=101, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=47, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=45, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=111, PETRI_PLACES=51, PETRI_TRANSITIONS=47} [2024-10-11 19:47:28,996 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -1 predicate places. [2024-10-11 19:47:28,996 INFO L471 AbstractCegarLoop]: Abstraction has has 51 places, 47 transitions, 111 flow [2024-10-11 19:47:28,997 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 22.0) internal successors, (66), 3 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:28,997 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:28,997 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-11 19:47:28,998 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-11 19:47:28,998 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-11 19:47:28,999 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:29,000 INFO L85 PathProgramCache]: Analyzing trace with hash -1082694039, now seen corresponding path program 1 times [2024-10-11 19:47:29,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:29,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [995025637] [2024-10-11 19:47:29,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:29,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:29,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:29,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:29,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:29,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [995025637] [2024-10-11 19:47:29,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [995025637] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:47:29,205 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132699549] [2024-10-11 19:47:29,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:29,206 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:47:29,206 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:47:29,208 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:47:29,210 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-11 19:47:29,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:29,293 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 19:47:29,298 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:47:29,377 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 19:47:29,460 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:29,460 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:47:29,524 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:29,524 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132699549] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:47:29,524 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:47:29,525 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-11 19:47:29,525 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834095300] [2024-10-11 19:47:29,525 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:47:29,525 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 19:47:29,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:29,526 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 19:47:29,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-11 19:47:29,582 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 20 out of 62 [2024-10-11 19:47:29,583 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 51 places, 47 transitions, 111 flow. Second operand has 9 states, 9 states have (on average 22.333333333333332) internal successors, (201), 9 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:29,583 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:29,583 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 20 of 62 [2024-10-11 19:47:29,599 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:29,691 INFO L124 PetriNetUnfolderBase]: 27/88 cut-off events. [2024-10-11 19:47:29,691 INFO L125 PetriNetUnfolderBase]: For 9/9 co-relation queries the response was YES. [2024-10-11 19:47:29,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186 conditions, 88 events. 27/88 cut-off events. For 9/9 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 231 event pairs, 0 based on Foata normal form. 20/104 useless extension candidates. Maximal degree in co-relation 160. Up to 57 conditions per place. [2024-10-11 19:47:29,692 INFO L140 encePairwiseOnDemand]: 58/62 looper letters, 23 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-10-11 19:47:29,693 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 32 places, 34 transitions, 128 flow [2024-10-11 19:47:29,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-11 19:47:29,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-11 19:47:29,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 107 transitions. [2024-10-11 19:47:29,698 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4314516129032258 [2024-10-11 19:47:29,698 INFO L175 Difference]: Start difference. First operand has 51 places, 47 transitions, 111 flow. Second operand 4 states and 107 transitions. [2024-10-11 19:47:29,698 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 32 places, 34 transitions, 128 flow [2024-10-11 19:47:29,699 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 29 places, 34 transitions, 122 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-10-11 19:47:29,699 INFO L231 Difference]: Finished difference. Result has 29 places, 23 transitions, 54 flow [2024-10-11 19:47:29,699 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=62, PETRI_DIFFERENCE_MINUEND_FLOW=50, PETRI_DIFFERENCE_MINUEND_PLACES=26, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=23, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=21, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=54, PETRI_PLACES=29, PETRI_TRANSITIONS=23} [2024-10-11 19:47:29,701 INFO L277 CegarLoopForPetriNet]: 52 programPoint places, -23 predicate places. [2024-10-11 19:47:29,701 INFO L471 AbstractCegarLoop]: Abstraction has has 29 places, 23 transitions, 54 flow [2024-10-11 19:47:29,702 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 22.333333333333332) internal successors, (201), 9 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:29,702 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:29,702 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1] [2024-10-11 19:47:29,724 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-11 19:47:29,902 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:47:29,903 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-11 19:47:29,904 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:29,904 INFO L85 PathProgramCache]: Analyzing trace with hash 796223466, now seen corresponding path program 1 times [2024-10-11 19:47:29,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:29,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573188182] [2024-10-11 19:47:29,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:29,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:29,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:47:29,924 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:47:29,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:47:29,952 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:47:29,952 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:47:29,954 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-10-11 19:47:29,957 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-10-11 19:47:29,957 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-10-11 19:47:29,958 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2024-10-11 19:47:29,958 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-10-11 19:47:29,959 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2024-10-11 19:47:29,960 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-10-11 19:47:29,960 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-11 19:47:29,960 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-11 19:47:29,963 WARN L239 ceAbstractionStarter]: 1 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:47:29,965 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 2 thread instances. [2024-10-11 19:47:29,991 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-11 19:47:29,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 72 places, 87 transitions, 190 flow [2024-10-11 19:47:30,011 INFO L124 PetriNetUnfolderBase]: 33/165 cut-off events. [2024-10-11 19:47:30,011 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-11 19:47:30,015 INFO L83 FinitePrefix]: Finished finitePrefix Result has 177 conditions, 165 events. 33/165 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 14. Compared 698 event pairs, 0 based on Foata normal form. 0/107 useless extension candidates. Maximal degree in co-relation 99. Up to 9 conditions per place. [2024-10-11 19:47:30,016 INFO L82 GeneralOperation]: Start removeDead. Operand has 72 places, 87 transitions, 190 flow [2024-10-11 19:47:30,018 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 72 places, 87 transitions, 190 flow [2024-10-11 19:47:30,019 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:47:30,021 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@55e9a93e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:47:30,022 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-10-11 19:47:30,023 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:47:30,024 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:47:30,024 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:47:30,024 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:30,024 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:47:30,024 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-11 19:47:30,025 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:30,025 INFO L85 PathProgramCache]: Analyzing trace with hash 429355, now seen corresponding path program 1 times [2024-10-11 19:47:30,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:30,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [533842145] [2024-10-11 19:47:30,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:30,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:30,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:30,068 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:30,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:30,070 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [533842145] [2024-10-11 19:47:30,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [533842145] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:47:30,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:47:30,072 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:47:30,072 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [747393750] [2024-10-11 19:47:30,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:47:30,073 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:47:30,073 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:30,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:47:30,075 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:47:30,089 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 87 [2024-10-11 19:47:30,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 72 places, 87 transitions, 190 flow. Second operand has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:30,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:30,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 87 [2024-10-11 19:47:30,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:30,793 INFO L124 PetriNetUnfolderBase]: 3291/6532 cut-off events. [2024-10-11 19:47:30,794 INFO L125 PetriNetUnfolderBase]: For 57/57 co-relation queries the response was YES. [2024-10-11 19:47:30,808 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11828 conditions, 6532 events. 3291/6532 cut-off events. For 57/57 co-relation queries the response was YES. Maximal size of possible extension queue 216. Compared 48954 event pairs, 2772 based on Foata normal form. 1717/7881 useless extension candidates. Maximal degree in co-relation 8686. Up to 4600 conditions per place. [2024-10-11 19:47:30,839 INFO L140 encePairwiseOnDemand]: 66/87 looper letters, 56 selfloop transitions, 2 changer transitions 1/85 dead transitions. [2024-10-11 19:47:30,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 71 places, 85 transitions, 304 flow [2024-10-11 19:47:30,840 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:47:30,840 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:47:30,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 168 transitions. [2024-10-11 19:47:30,843 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6436781609195402 [2024-10-11 19:47:30,843 INFO L175 Difference]: Start difference. First operand has 72 places, 87 transitions, 190 flow. Second operand 3 states and 168 transitions. [2024-10-11 19:47:30,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 71 places, 85 transitions, 304 flow [2024-10-11 19:47:30,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 85 transitions, 304 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:47:30,850 INFO L231 Difference]: Finished difference. Result has 71 places, 66 transitions, 152 flow [2024-10-11 19:47:30,851 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=150, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=65, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=152, PETRI_PLACES=71, PETRI_TRANSITIONS=66} [2024-10-11 19:47:30,851 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2024-10-11 19:47:30,852 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 66 transitions, 152 flow [2024-10-11 19:47:30,853 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 27.0) internal successors, (81), 3 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:30,855 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:30,856 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:47:30,856 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-11 19:47:30,856 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-11 19:47:30,857 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:30,857 INFO L85 PathProgramCache]: Analyzing trace with hash 429356, now seen corresponding path program 1 times [2024-10-11 19:47:30,857 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:30,857 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771320582] [2024-10-11 19:47:30,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:30,857 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:30,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:30,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:30,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771320582] [2024-10-11 19:47:30,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1771320582] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:47:30,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:47:30,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:47:30,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975235703] [2024-10-11 19:47:30,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:47:30,932 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:47:30,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:30,933 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:47:30,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:47:30,993 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 29 out of 87 [2024-10-11 19:47:30,993 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 66 transitions, 152 flow. Second operand has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:30,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:30,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 29 of 87 [2024-10-11 19:47:30,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:31,634 INFO L124 PetriNetUnfolderBase]: 2893/5932 cut-off events. [2024-10-11 19:47:31,635 INFO L125 PetriNetUnfolderBase]: For 135/143 co-relation queries the response was YES. [2024-10-11 19:47:31,649 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10701 conditions, 5932 events. 2893/5932 cut-off events. For 135/143 co-relation queries the response was YES. Maximal size of possible extension queue 207. Compared 44729 event pairs, 2599 based on Foata normal form. 1/5515 useless extension candidates. Maximal degree in co-relation 9833. Up to 4577 conditions per place. [2024-10-11 19:47:31,681 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 48 selfloop transitions, 2 changer transitions 0/77 dead transitions. [2024-10-11 19:47:31,681 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 77 transitions, 274 flow [2024-10-11 19:47:31,682 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:47:31,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:47:31,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 139 transitions. [2024-10-11 19:47:31,683 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5325670498084292 [2024-10-11 19:47:31,684 INFO L175 Difference]: Start difference. First operand has 71 places, 66 transitions, 152 flow. Second operand 3 states and 139 transitions. [2024-10-11 19:47:31,684 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 77 transitions, 274 flow [2024-10-11 19:47:31,689 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 70 places, 77 transitions, 270 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:47:31,691 INFO L231 Difference]: Finished difference. Result has 71 places, 67 transitions, 162 flow [2024-10-11 19:47:31,692 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=148, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=64, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=162, PETRI_PLACES=71, PETRI_TRANSITIONS=67} [2024-10-11 19:47:31,692 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, -1 predicate places. [2024-10-11 19:47:31,693 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 67 transitions, 162 flow [2024-10-11 19:47:31,693 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 30.0) internal successors, (90), 3 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:31,694 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:31,694 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-11 19:47:31,694 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-10-11 19:47:31,694 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-11 19:47:31,695 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:31,695 INFO L85 PathProgramCache]: Analyzing trace with hash 1395160745, now seen corresponding path program 1 times [2024-10-11 19:47:31,695 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:31,695 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [878273282] [2024-10-11 19:47:31,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:31,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:31,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:31,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:31,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [878273282] [2024-10-11 19:47:31,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [878273282] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:47:31,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654740152] [2024-10-11 19:47:31,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:31,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:47:31,814 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:47:31,816 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:47:31,818 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-11 19:47:31,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:31,897 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 19:47:31,898 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:47:31,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 19:47:31,964 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:31,965 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:47:32,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:32,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [654740152] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:47:32,023 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:47:32,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 5 [2024-10-11 19:47:32,023 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [954429396] [2024-10-11 19:47:32,024 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:47:32,024 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-10-11 19:47:32,024 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:32,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-10-11 19:47:32,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-10-11 19:47:32,065 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 28 out of 87 [2024-10-11 19:47:32,066 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 67 transitions, 162 flow. Second operand has 7 states, 7 states have (on average 30.428571428571427) internal successors, (213), 7 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) [2024-10-11 19:47:32,066 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:32,066 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 28 of 87 [2024-10-11 19:47:32,066 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:32,758 INFO L124 PetriNetUnfolderBase]: 2792/5577 cut-off events. [2024-10-11 19:47:32,759 INFO L125 PetriNetUnfolderBase]: For 311/311 co-relation queries the response was YES. [2024-10-11 19:47:32,768 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10256 conditions, 5577 events. 2792/5577 cut-off events. For 311/311 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 42851 event pairs, 97 based on Foata normal form. 120/5400 useless extension candidates. Maximal degree in co-relation 9145. Up to 3299 conditions per place. [2024-10-11 19:47:32,796 INFO L140 encePairwiseOnDemand]: 83/87 looper letters, 85 selfloop transitions, 4 changer transitions 0/115 dead transitions. [2024-10-11 19:47:32,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 115 transitions, 434 flow [2024-10-11 19:47:32,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-11 19:47:32,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-11 19:47:32,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 232 transitions. [2024-10-11 19:47:32,801 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5333333333333333 [2024-10-11 19:47:32,801 INFO L175 Difference]: Start difference. First operand has 71 places, 67 transitions, 162 flow. Second operand 5 states and 232 transitions. [2024-10-11 19:47:32,801 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 115 transitions, 434 flow [2024-10-11 19:47:32,803 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 115 transitions, 432 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-11 19:47:32,806 INFO L231 Difference]: Finished difference. Result has 73 places, 66 transitions, 164 flow [2024-10-11 19:47:32,807 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=87, PETRI_DIFFERENCE_MINUEND_FLOW=156, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=164, PETRI_PLACES=73, PETRI_TRANSITIONS=66} [2024-10-11 19:47:32,808 INFO L277 CegarLoopForPetriNet]: 72 programPoint places, 1 predicate places. [2024-10-11 19:47:32,809 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 66 transitions, 164 flow [2024-10-11 19:47:32,809 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 30.428571428571427) internal successors, (213), 7 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) [2024-10-11 19:47:32,809 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:32,809 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 1, 1, 1, 1] [2024-10-11 19:47:32,829 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-11 19:47:33,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:47:33,013 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-11 19:47:33,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:33,013 INFO L85 PathProgramCache]: Analyzing trace with hash -102108100, now seen corresponding path program 1 times [2024-10-11 19:47:33,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:33,014 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1401501669] [2024-10-11 19:47:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:33,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:33,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:47:33,030 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:47:33,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:47:33,053 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:47:33,053 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:47:33,055 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-10-11 19:47:33,056 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-10-11 19:47:33,056 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-10-11 19:47:33,056 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2024-10-11 19:47:33,056 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-10-11 19:47:33,056 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2024-10-11 19:47:33,057 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-10-11 19:47:33,057 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-10-11 19:47:33,058 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-11 19:47:33,058 WARN L239 ceAbstractionStarter]: 2 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:47:33,061 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 3 thread instances. [2024-10-11 19:47:33,085 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-10-11 19:47:33,088 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 92 places, 112 transitions, 251 flow [2024-10-11 19:47:33,105 INFO L124 PetriNetUnfolderBase]: 50/256 cut-off events. [2024-10-11 19:47:33,105 INFO L125 PetriNetUnfolderBase]: For 19/19 co-relation queries the response was YES. [2024-10-11 19:47:33,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 281 conditions, 256 events. 50/256 cut-off events. For 19/19 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 1148 event pairs, 1 based on Foata normal form. 0/166 useless extension candidates. Maximal degree in co-relation 176. Up to 12 conditions per place. [2024-10-11 19:47:33,107 INFO L82 GeneralOperation]: Start removeDead. Operand has 92 places, 112 transitions, 251 flow [2024-10-11 19:47:33,109 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 92 places, 112 transitions, 251 flow [2024-10-11 19:47:33,110 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:47:33,111 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@55e9a93e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:47:33,111 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-10-11 19:47:33,112 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:47:33,112 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:47:33,112 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:47:33,112 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:33,112 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:47:33,112 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-11 19:47:33,113 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:33,113 INFO L85 PathProgramCache]: Analyzing trace with hash 540571, now seen corresponding path program 1 times [2024-10-11 19:47:33,113 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:33,113 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216863605] [2024-10-11 19:47:33,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:33,113 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:33,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:33,136 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:33,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:33,137 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216863605] [2024-10-11 19:47:33,137 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216863605] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:47:33,137 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:47:33,137 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:47:33,137 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258563451] [2024-10-11 19:47:33,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:47:33,137 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:47:33,138 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:33,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:47:33,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:47:33,149 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 34 out of 112 [2024-10-11 19:47:33,150 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 92 places, 112 transitions, 251 flow. Second operand has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:33,150 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:33,150 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 34 of 112 [2024-10-11 19:47:33,150 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:40,659 INFO L124 PetriNetUnfolderBase]: 51447/84449 cut-off events. [2024-10-11 19:47:40,659 INFO L125 PetriNetUnfolderBase]: For 1236/1236 co-relation queries the response was YES. [2024-10-11 19:47:40,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 156793 conditions, 84449 events. 51447/84449 cut-off events. For 1236/1236 co-relation queries the response was YES. Maximal size of possible extension queue 2093. Compared 749987 event pairs, 43669 based on Foata normal form. 25091/105232 useless extension candidates. Maximal degree in co-relation 57162. Up to 62348 conditions per place. [2024-10-11 19:47:41,210 INFO L140 encePairwiseOnDemand]: 85/112 looper letters, 76 selfloop transitions, 2 changer transitions 1/113 dead transitions. [2024-10-11 19:47:41,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 113 transitions, 411 flow [2024-10-11 19:47:41,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:47:41,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:47:41,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 224 transitions. [2024-10-11 19:47:41,213 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6666666666666666 [2024-10-11 19:47:41,214 INFO L175 Difference]: Start difference. First operand has 92 places, 112 transitions, 251 flow. Second operand 3 states and 224 transitions. [2024-10-11 19:47:41,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 113 transitions, 411 flow [2024-10-11 19:47:41,219 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 113 transitions, 411 flow, removed 0 selfloop flow, removed 0 redundant places. [2024-10-11 19:47:41,222 INFO L231 Difference]: Finished difference. Result has 91 places, 85 transitions, 201 flow [2024-10-11 19:47:41,223 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=199, PETRI_DIFFERENCE_MINUEND_PLACES=89, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=86, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=201, PETRI_PLACES=91, PETRI_TRANSITIONS=85} [2024-10-11 19:47:41,224 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -1 predicate places. [2024-10-11 19:47:41,224 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 85 transitions, 201 flow [2024-10-11 19:47:41,224 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.0) internal successors, (105), 3 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:41,224 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:41,225 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:47:41,225 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-10-11 19:47:41,225 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-11 19:47:41,225 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:41,226 INFO L85 PathProgramCache]: Analyzing trace with hash 540572, now seen corresponding path program 1 times [2024-10-11 19:47:41,226 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:41,226 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [804801324] [2024-10-11 19:47:41,226 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:41,226 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:41,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:41,284 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:41,284 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:41,284 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [804801324] [2024-10-11 19:47:41,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [804801324] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:47:41,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:47:41,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:47:41,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429940697] [2024-10-11 19:47:41,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:47:41,285 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:47:41,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:41,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:47:41,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:47:41,300 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 37 out of 112 [2024-10-11 19:47:41,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 85 transitions, 201 flow. Second operand has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:41,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:41,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 37 of 112 [2024-10-11 19:47:41,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:46,442 INFO L124 PetriNetUnfolderBase]: 44911/74973 cut-off events. [2024-10-11 19:47:46,443 INFO L125 PetriNetUnfolderBase]: For 2262/2336 co-relation queries the response was YES. [2024-10-11 19:47:46,577 INFO L83 FinitePrefix]: Finished finitePrefix Result has 139442 conditions, 74973 events. 44911/74973 cut-off events. For 2262/2336 co-relation queries the response was YES. Maximal size of possible extension queue 1919. Compared 665249 event pairs, 43660 based on Foata normal form. 1/70602 useless extension candidates. Maximal degree in co-relation 127839. Up to 62325 conditions per place. [2024-10-11 19:47:46,886 INFO L140 encePairwiseOnDemand]: 108/112 looper letters, 59 selfloop transitions, 2 changer transitions 0/96 dead transitions. [2024-10-11 19:47:46,887 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 92 places, 96 transitions, 345 flow [2024-10-11 19:47:46,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-11 19:47:46,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-11 19:47:46,888 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 174 transitions. [2024-10-11 19:47:46,888 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5178571428571429 [2024-10-11 19:47:46,888 INFO L175 Difference]: Start difference. First operand has 91 places, 85 transitions, 201 flow. Second operand 3 states and 174 transitions. [2024-10-11 19:47:46,888 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 92 places, 96 transitions, 345 flow [2024-10-11 19:47:47,019 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 96 transitions, 341 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-11 19:47:47,021 INFO L231 Difference]: Finished difference. Result has 91 places, 86 transitions, 211 flow [2024-10-11 19:47:47,022 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=197, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=83, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=211, PETRI_PLACES=91, PETRI_TRANSITIONS=86} [2024-10-11 19:47:47,023 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -1 predicate places. [2024-10-11 19:47:47,024 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 86 transitions, 211 flow [2024-10-11 19:47:47,025 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 38.0) internal successors, (114), 3 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:47,025 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:47,025 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-10-11 19:47:47,025 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-10-11 19:47:47,025 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-11 19:47:47,026 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:47,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1030390178, now seen corresponding path program 1 times [2024-10-11 19:47:47,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:47,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118722690] [2024-10-11 19:47:47,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:47,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:47,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:47,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:47,144 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:47,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118722690] [2024-10-11 19:47:47,144 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118722690] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-11 19:47:47,144 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340205145] [2024-10-11 19:47:47,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:47,145 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:47:47,145 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 [2024-10-11 19:47:47,146 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-11 19:47:47,148 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-11 19:47:47,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:47,224 INFO L255 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-10-11 19:47:47,225 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-11 19:47:47,239 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-11 19:47:47,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:47,298 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-11 19:47:47,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:47,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [340205145] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-11 19:47:47,357 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-11 19:47:47,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-10-11 19:47:47,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [856376379] [2024-10-11 19:47:47,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-11 19:47:47,357 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-10-11 19:47:47,357 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:47,358 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-10-11 19:47:47,358 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-10-11 19:47:47,411 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 112 [2024-10-11 19:47:47,412 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 86 transitions, 211 flow. Second operand has 9 states, 9 states have (on average 38.333333333333336) internal successors, (345), 9 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:47,413 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:47,413 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 112 [2024-10-11 19:47:47,413 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-11 19:47:49,210 INFO L124 PetriNetUnfolderBase]: 10557/18088 cut-off events. [2024-10-11 19:47:49,210 INFO L125 PetriNetUnfolderBase]: For 4009/4009 co-relation queries the response was YES. [2024-10-11 19:47:49,235 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34648 conditions, 18088 events. 10557/18088 cut-off events. For 4009/4009 co-relation queries the response was YES. Maximal size of possible extension queue 572. Compared 140241 event pairs, 1800 based on Foata normal form. 2220/20164 useless extension candidates. Maximal degree in co-relation 3548. Up to 11100 conditions per place. [2024-10-11 19:47:49,278 INFO L140 encePairwiseOnDemand]: 108/112 looper letters, 92 selfloop transitions, 4 changer transitions 0/121 dead transitions. [2024-10-11 19:47:49,278 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 121 transitions, 462 flow [2024-10-11 19:47:49,278 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-11 19:47:49,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-11 19:47:49,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 318 transitions. [2024-10-11 19:47:49,279 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4732142857142857 [2024-10-11 19:47:49,279 INFO L175 Difference]: Start difference. First operand has 91 places, 86 transitions, 211 flow. Second operand 6 states and 318 transitions. [2024-10-11 19:47:49,279 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 121 transitions, 462 flow [2024-10-11 19:47:49,281 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 121 transitions, 458 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-11 19:47:49,283 INFO L231 Difference]: Finished difference. Result has 73 places, 61 transitions, 154 flow [2024-10-11 19:47:49,283 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=112, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=68, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=154, PETRI_PLACES=73, PETRI_TRANSITIONS=61} [2024-10-11 19:47:49,284 INFO L277 CegarLoopForPetriNet]: 92 programPoint places, -19 predicate places. [2024-10-11 19:47:49,284 INFO L471 AbstractCegarLoop]: Abstraction has has 73 places, 61 transitions, 154 flow [2024-10-11 19:47:49,284 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 38.333333333333336) internal successors, (345), 9 states have internal predecessors, (345), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:49,284 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:49,284 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 3, 1, 1, 1, 1, 1] [2024-10-11 19:47:49,302 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-11 19:47:49,485 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,4 /storage/repos/ultimate-clean/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-11 19:47:49,485 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-11 19:47:49,486 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:49,486 INFO L85 PathProgramCache]: Analyzing trace with hash -671413955, now seen corresponding path program 1 times [2024-10-11 19:47:49,486 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:49,486 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1766619345] [2024-10-11 19:47:49,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:49,486 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:49,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:47:49,505 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2024-10-11 19:47:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2024-10-11 19:47:49,530 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2024-10-11 19:47:49,531 INFO L325 BasicCegarLoop]: Counterexample is feasible [2024-10-11 19:47:49,531 INFO L782 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES (6 of 7 remaining) [2024-10-11 19:47:49,532 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2024-10-11 19:47:49,532 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2024-10-11 19:47:49,533 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2024-10-11 19:47:49,533 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2024-10-11 19:47:49,533 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_LEAK (1 of 7 remaining) [2024-10-11 19:47:49,533 INFO L782 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2024-10-11 19:47:49,533 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-11 19:47:49,533 INFO L407 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1] [2024-10-11 19:47:49,534 WARN L239 ceAbstractionStarter]: 3 thread instances were not sufficient, I will increase this number and restart the analysis [2024-10-11 19:47:49,534 INFO L484 ceAbstractionStarter]: Constructing petrified ICFG for 4 thread instances. [2024-10-11 19:47:49,567 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-10-11 19:47:49,572 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 112 places, 137 transitions, 314 flow [2024-10-11 19:47:49,603 INFO L124 PetriNetUnfolderBase]: 75/391 cut-off events. [2024-10-11 19:47:49,604 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-10-11 19:47:49,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 442 conditions, 391 events. 75/391 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 18. Compared 1884 event pairs, 6 based on Foata normal form. 0/253 useless extension candidates. Maximal degree in co-relation 280. Up to 32 conditions per place. [2024-10-11 19:47:49,608 INFO L82 GeneralOperation]: Start removeDead. Operand has 112 places, 137 transitions, 314 flow [2024-10-11 19:47:49,611 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 112 places, 137 transitions, 314 flow [2024-10-11 19:47:49,613 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-11 19:47:49,614 INFO L333 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=None, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@55e9a93e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-11 19:47:49,614 INFO L334 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2024-10-11 19:47:49,615 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-11 19:47:49,615 INFO L124 PetriNetUnfolderBase]: 0/4 cut-off events. [2024-10-11 19:47:49,615 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-11 19:47:49,615 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-11 19:47:49,616 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-11 19:47:49,616 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2024-10-11 19:47:49,616 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-11 19:47:49,616 INFO L85 PathProgramCache]: Analyzing trace with hash 676612, now seen corresponding path program 1 times [2024-10-11 19:47:49,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-11 19:47:49,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591704198] [2024-10-11 19:47:49,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-11 19:47:49,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-11 19:47:49,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-11 19:47:49,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-11 19:47:49,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-11 19:47:49,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591704198] [2024-10-11 19:47:49,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591704198] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-11 19:47:49,653 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-11 19:47:49,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-11 19:47:49,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569974545] [2024-10-11 19:47:49,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-11 19:47:49,653 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-11 19:47:49,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-11 19:47:49,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-11 19:47:49,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-11 19:47:49,672 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 42 out of 137 [2024-10-11 19:47:49,672 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 112 places, 137 transitions, 314 flow. Second operand has 3 states, 3 states have (on average 43.0) internal successors, (129), 3 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-11 19:47:49,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-11 19:47:49,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 42 of 137 [2024-10-11 19:47:49,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand