./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 3061b6dc Calling Ultimate with: /root/.sdkman/candidates/java/11.0.12-open/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerMemDerefMemtrack.xml -i ../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c -s /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 2d41b1dc1d5d7eec1f1fd4e3cbbef0194aa2dded6486a15b383e9bb8fe1468a3 --- Real Ultimate output --- This is Ultimate 0.2.5-tmp.dk.eval-assert-order-craig-3061b6d-m [2024-11-19 09:47:53,147 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-19 09:47:53,236 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-19 09:47:53,241 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-19 09:47:53,241 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-19 09:47:53,264 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-19 09:47:53,265 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-19 09:47:53,266 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-19 09:47:53,266 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-19 09:47:53,267 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-19 09:47:53,267 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-19 09:47:53,268 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-19 09:47:53,268 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-19 09:47:53,269 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-19 09:47:53,269 INFO L153 SettingsManager]: * Use SBE=true [2024-11-19 09:47:53,269 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-19 09:47:53,270 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-19 09:47:53,270 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-19 09:47:53,270 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-19 09:47:53,271 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-19 09:47:53,271 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-19 09:47:53,271 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-19 09:47:53,272 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-19 09:47:53,272 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-19 09:47:53,272 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-19 09:47:53,273 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-19 09:47:53,273 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-19 09:47:53,273 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-19 09:47:53,273 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-19 09:47:53,274 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-19 09:47:53,274 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-19 09:47:53,274 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-19 09:47:53,274 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-19 09:47:53,275 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:47:53,276 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-19 09:47:53,277 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-19 09:47:53,277 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-19 09:47:53,277 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-19 09:47:53,277 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-19 09:47:53,278 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-19 09:47:53,278 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-19 09:47:53,279 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-19 09:47:53,279 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/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2d41b1dc1d5d7eec1f1fd4e3cbbef0194aa2dded6486a15b383e9bb8fe1468a3 [2024-11-19 09:47:53,542 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-19 09:47:53,568 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-19 09:47:53,572 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-19 09:47:53,573 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-19 09:47:53,574 INFO L274 PluginConnector]: CDTParser initialized [2024-11-19 09:47:53,575 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2024-11-19 09:47:55,106 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-19 09:47:55,317 INFO L384 CDTParser]: Found 1 translation units. [2024-11-19 09:47:55,318 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/parallel-parallel-sum-equiv.wvr.c [2024-11-19 09:47:55,326 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8e8a32b0/8d71bb0a9b9147cb9498fc2b269b9bd1/FLAGfae24912b [2024-11-19 09:47:55,339 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/f8e8a32b0/8d71bb0a9b9147cb9498fc2b269b9bd1 [2024-11-19 09:47:55,341 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-19 09:47:55,343 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-19 09:47:55,345 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-19 09:47:55,346 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-19 09:47:55,351 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-19 09:47:55,351 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:47:55" (1/1) ... [2024-11-19 09:47:55,352 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@13e8e28c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:55, skipping insertion in model container [2024-11-19 09:47:55,352 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 09:47:55" (1/1) ... [2024-11-19 09:47:55,374 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-19 09:47:55,592 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-19 09:47:55,596 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:47:55,606 INFO L200 MainTranslator]: Completed pre-run [2024-11-19 09:47:55,634 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-19 09:47:55,652 INFO L204 MainTranslator]: Completed translation [2024-11-19 09:47:55,653 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:55 WrapperNode [2024-11-19 09:47:55,653 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-19 09:47:55,654 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-19 09:47:55,654 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-19 09:47:55,655 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-19 09:47:55,661 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:55" (1/1) ... [2024-11-19 09:47:55,673 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:55" (1/1) ... [2024-11-19 09:47:55,699 INFO L138 Inliner]: procedures = 26, calls = 54, calls flagged for inlining = 19, calls inlined = 23, statements flattened = 253 [2024-11-19 09:47:55,700 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-19 09:47:55,701 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-19 09:47:55,701 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-19 09:47:55,701 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-19 09:47:55,719 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:55" (1/1) ... [2024-11-19 09:47:55,720 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:55" (1/1) ... [2024-11-19 09:47:55,729 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:55" (1/1) ... [2024-11-19 09:47:55,752 INFO L175 MemorySlicer]: Split 6 memory accesses to 2 slices as follows [2, 4]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 1 writes are split as follows [0, 1]. [2024-11-19 09:47:55,753 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:55" (1/1) ... [2024-11-19 09:47:55,757 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:55" (1/1) ... [2024-11-19 09:47:55,766 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:55" (1/1) ... [2024-11-19 09:47:55,775 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:55" (1/1) ... [2024-11-19 09:47:55,777 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:55" (1/1) ... [2024-11-19 09:47:55,783 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:55" (1/1) ... [2024-11-19 09:47:55,790 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-19 09:47:55,791 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-19 09:47:55,791 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-19 09:47:55,791 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-19 09:47:55,792 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:55" (1/1) ... [2024-11-19 09:47:55,801 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-19 09:47:55,812 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:47:55,827 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-19 09:47:55,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-19 09:47:55,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-19 09:47:55,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-19 09:47:55,871 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-19 09:47:55,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-19 09:47:55,871 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-19 09:47:55,871 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-19 09:47:55,871 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-19 09:47:55,871 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-19 09:47:55,871 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-19 09:47:55,872 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-19 09:47:55,872 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-19 09:47:55,872 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-19 09:47:55,872 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-19 09:47:55,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-19 09:47:55,872 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-19 09:47:55,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-19 09:47:55,872 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-19 09:47:55,873 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-19 09:47:55,873 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-19 09:47:55,873 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-19 09:47:55,875 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-19 09:47:55,984 INFO L238 CfgBuilder]: Building ICFG [2024-11-19 09:47:55,986 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-19 09:47:56,494 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-19 09:47:56,494 INFO L287 CfgBuilder]: Performing block encoding [2024-11-19 09:47:56,796 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-19 09:47:56,797 INFO L316 CfgBuilder]: Removed 4 assume(true) statements. [2024-11-19 09:47:56,797 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:47:56 BoogieIcfgContainer [2024-11-19 09:47:56,797 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-19 09:47:56,799 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-19 09:47:56,801 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-19 09:47:56,804 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-19 09:47:56,804 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 09:47:55" (1/3) ... [2024-11-19 09:47:56,805 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d25be6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:47:56, skipping insertion in model container [2024-11-19 09:47:56,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 09:47:55" (2/3) ... [2024-11-19 09:47:56,805 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6d25be6c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 09:47:56, skipping insertion in model container [2024-11-19 09:47:56,805 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 09:47:56" (3/3) ... [2024-11-19 09:47:56,806 INFO L112 eAbstractionObserver]: Analyzing ICFG parallel-parallel-sum-equiv.wvr.c [2024-11-19 09:47:56,823 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-19 09:47:56,823 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 10 error locations. [2024-11-19 09:47:56,823 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-19 09:47:56,907 INFO L143 ThreadInstanceAdder]: Constructed 10 joinOtherThreadTransitions. [2024-11-19 09:47:56,946 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 74 places, 70 transitions, 180 flow [2024-11-19 09:47:56,989 INFO L124 PetriNetUnfolderBase]: 9/63 cut-off events. [2024-11-19 09:47:56,989 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-19 09:47:56,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82 conditions, 63 events. 9/63 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 10. Compared 138 event pairs, 0 based on Foata normal form. 0/44 useless extension candidates. Maximal degree in co-relation 59. Up to 3 conditions per place. [2024-11-19 09:47:56,994 INFO L82 GeneralOperation]: Start removeDead. Operand has 74 places, 70 transitions, 180 flow [2024-11-19 09:47:56,997 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 66 places, 62 transitions, 154 flow [2024-11-19 09:47:57,010 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-19 09:47:57,016 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;@4fb68d98, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-19 09:47:57,016 INFO L334 AbstractCegarLoop]: Starting to check reachability of 22 error locations. [2024-11-19 09:47:57,020 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-19 09:47:57,020 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-19 09:47:57,020 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-19 09:47:57,020 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:57,021 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:47:57,022 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-19 09:47:57,027 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:57,027 INFO L85 PathProgramCache]: Analyzing trace with hash 795702, now seen corresponding path program 1 times [2024-11-19 09:47:57,036 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:57,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766576035] [2024-11-19 09:47:57,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:57,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:57,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:57,355 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:57,356 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:57,356 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766576035] [2024-11-19 09:47:57,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [766576035] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:47:57,357 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:47:57,358 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-19 09:47:57,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202170756] [2024-11-19 09:47:57,360 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:57,369 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-19 09:47:57,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:57,401 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-19 09:47:57,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-19 09:47:57,412 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 72 [2024-11-19 09:47:57,415 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 62 transitions, 154 flow. Second operand has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:57,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:57,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 72 [2024-11-19 09:47:57,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:47:59,413 INFO L124 PetriNetUnfolderBase]: 14986/20198 cut-off events. [2024-11-19 09:47:59,413 INFO L125 PetriNetUnfolderBase]: For 974/974 co-relation queries the response was YES. [2024-11-19 09:47:59,460 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41822 conditions, 20198 events. 14986/20198 cut-off events. For 974/974 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 103935 event pairs, 13324 based on Foata normal form. 1/15693 useless extension candidates. Maximal degree in co-relation 41747. Up to 20169 conditions per place. [2024-11-19 09:47:59,573 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 49 selfloop transitions, 2 changer transitions 0/56 dead transitions. [2024-11-19 09:47:59,573 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 56 transitions, 244 flow [2024-11-19 09:47:59,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-19 09:47:59,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-19 09:47:59,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 86 transitions. [2024-11-19 09:47:59,587 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39814814814814814 [2024-11-19 09:47:59,589 INFO L175 Difference]: Start difference. First operand has 66 places, 62 transitions, 154 flow. Second operand 3 states and 86 transitions. [2024-11-19 09:47:59,590 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 56 transitions, 244 flow [2024-11-19 09:47:59,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 56 transitions, 224 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-19 09:47:59,618 INFO L231 Difference]: Finished difference. Result has 57 places, 56 transitions, 126 flow [2024-11-19 09:47:59,621 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=57, PETRI_TRANSITIONS=56} [2024-11-19 09:47:59,627 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -9 predicate places. [2024-11-19 09:47:59,627 INFO L471 AbstractCegarLoop]: Abstraction has has 57 places, 56 transitions, 126 flow [2024-11-19 09:47:59,628 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 11.0) internal successors, (33), 3 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:59,628 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:47:59,628 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-19 09:47:59,628 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-19 09:47:59,629 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-19 09:47:59,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:47:59,630 INFO L85 PathProgramCache]: Analyzing trace with hash 795703, now seen corresponding path program 1 times [2024-11-19 09:47:59,630 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:47:59,630 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1925138385] [2024-11-19 09:47:59,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:47:59,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:47:59,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:47:59,910 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:47:59,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:47:59,911 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1925138385] [2024-11-19 09:47:59,911 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1925138385] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:47:59,911 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:47:59,911 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:47:59,912 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326415167] [2024-11-19 09:47:59,912 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:47:59,913 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:47:59,913 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:47:59,913 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:47:59,914 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:47:59,917 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 72 [2024-11-19 09:47:59,918 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 57 places, 56 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:47:59,918 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:47:59,918 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 72 [2024-11-19 09:47:59,918 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:48:01,515 INFO L124 PetriNetUnfolderBase]: 14987/20201 cut-off events. [2024-11-19 09:48:01,515 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2024-11-19 09:48:01,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40858 conditions, 20201 events. 14987/20201 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 103919 event pairs, 13324 based on Foata normal form. 0/15695 useless extension candidates. Maximal degree in co-relation 40836. Up to 20174 conditions per place. [2024-11-19 09:48:01,652 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 51 selfloop transitions, 4 changer transitions 0/59 dead transitions. [2024-11-19 09:48:01,653 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 59 transitions, 244 flow [2024-11-19 09:48:01,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:48:01,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:48:01,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-11-19 09:48:01,655 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3333333333333333 [2024-11-19 09:48:01,655 INFO L175 Difference]: Start difference. First operand has 57 places, 56 transitions, 126 flow. Second operand 4 states and 96 transitions. [2024-11-19 09:48:01,655 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 59 transitions, 244 flow [2024-11-19 09:48:01,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 59 transitions, 238 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:48:01,658 INFO L231 Difference]: Finished difference. Result has 60 places, 59 transitions, 149 flow [2024-11-19 09:48:01,658 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=60, PETRI_TRANSITIONS=59} [2024-11-19 09:48:01,659 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -6 predicate places. [2024-11-19 09:48:01,660 INFO L471 AbstractCegarLoop]: Abstraction has has 60 places, 59 transitions, 149 flow [2024-11-19 09:48:01,660 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 10.75) internal successors, (43), 4 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:01,660 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:48:01,660 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-19 09:48:01,660 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-19 09:48:01,661 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-19 09:48:01,661 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:48:01,662 INFO L85 PathProgramCache]: Analyzing trace with hash 764695564, now seen corresponding path program 1 times [2024-11-19 09:48:01,778 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:48:01,779 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [131400609] [2024-11-19 09:48:01,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:48:01,779 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:48:01,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:48:02,084 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:02,084 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:48:02,084 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [131400609] [2024-11-19 09:48:02,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [131400609] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:48:02,085 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [127015149] [2024-11-19 09:48:02,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:48:02,085 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:48:02,086 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:48:02,087 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:48:02,089 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-19 09:48:02,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:48:02,204 INFO L255 TraceCheckSpWp]: Trace formula consists of 76 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-19 09:48:02,208 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:48:02,284 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-19 09:48:02,493 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:02,493 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:48:02,603 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:02,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [127015149] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:48:02,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:48:02,604 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-19 09:48:02,604 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667255014] [2024-11-19 09:48:02,604 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:48:02,605 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-19 09:48:02,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:48:02,605 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-19 09:48:02,606 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-19 09:48:02,633 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 72 [2024-11-19 09:48:02,634 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 60 places, 59 transitions, 149 flow. Second operand has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:02,634 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:48:02,634 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 72 [2024-11-19 09:48:02,634 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:48:04,447 INFO L124 PetriNetUnfolderBase]: 14988/20203 cut-off events. [2024-11-19 09:48:04,447 INFO L125 PetriNetUnfolderBase]: For 132/132 co-relation queries the response was YES. [2024-11-19 09:48:04,491 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40874 conditions, 20203 events. 14988/20203 cut-off events. For 132/132 co-relation queries the response was YES. Maximal size of possible extension queue 748. Compared 103898 event pairs, 13324 based on Foata normal form. 0/15696 useless extension candidates. Maximal degree in co-relation 40843. Up to 20171 conditions per place. [2024-11-19 09:48:04,569 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 47 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2024-11-19 09:48:04,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 61 transitions, 271 flow [2024-11-19 09:48:04,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:48:04,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:48:04,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 139 transitions. [2024-11-19 09:48:04,571 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.24131944444444445 [2024-11-19 09:48:04,571 INFO L175 Difference]: Start difference. First operand has 60 places, 59 transitions, 149 flow. Second operand 8 states and 139 transitions. [2024-11-19 09:48:04,571 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 61 transitions, 271 flow [2024-11-19 09:48:04,572 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 61 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-19 09:48:04,575 INFO L231 Difference]: Finished difference. Result has 65 places, 61 transitions, 174 flow [2024-11-19 09:48:04,575 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=142, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=174, PETRI_PLACES=65, PETRI_TRANSITIONS=61} [2024-11-19 09:48:04,576 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -1 predicate places. [2024-11-19 09:48:04,576 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 61 transitions, 174 flow [2024-11-19 09:48:04,577 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 11.363636363636363) internal successors, (125), 11 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:04,577 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:48:04,577 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:48:04,597 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-19 09:48:04,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:48:04,782 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread4Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-19 09:48:04,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:48:04,783 INFO L85 PathProgramCache]: Analyzing trace with hash 131630980, now seen corresponding path program 1 times [2024-11-19 09:48:04,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:48:04,784 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953885040] [2024-11-19 09:48:04,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:48:04,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:48:04,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:48:04,869 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:04,869 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:48:04,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953885040] [2024-11-19 09:48:04,870 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [953885040] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:48:04,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:48:04,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-19 09:48:04,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504029191] [2024-11-19 09:48:04,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:48:04,872 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-19 09:48:04,873 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:48:04,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-19 09:48:04,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-19 09:48:04,881 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 72 [2024-11-19 09:48:04,882 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 61 transitions, 174 flow. Second operand has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:04,882 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:48:04,882 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 72 [2024-11-19 09:48:04,882 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:48:05,969 INFO L124 PetriNetUnfolderBase]: 11188/15110 cut-off events. [2024-11-19 09:48:05,970 INFO L125 PetriNetUnfolderBase]: For 100/100 co-relation queries the response was YES. [2024-11-19 09:48:05,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30613 conditions, 15110 events. 11188/15110 cut-off events. For 100/100 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 74399 event pairs, 9814 based on Foata normal form. 0/12560 useless extension candidates. Maximal degree in co-relation 30575. Up to 15077 conditions per place. [2024-11-19 09:48:06,051 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 50 selfloop transitions, 4 changer transitions 0/58 dead transitions. [2024-11-19 09:48:06,052 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 58 transitions, 276 flow [2024-11-19 09:48:06,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-19 09:48:06,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-19 09:48:06,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 91 transitions. [2024-11-19 09:48:06,056 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3159722222222222 [2024-11-19 09:48:06,056 INFO L175 Difference]: Start difference. First operand has 65 places, 61 transitions, 174 flow. Second operand 4 states and 91 transitions. [2024-11-19 09:48:06,056 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 58 transitions, 276 flow [2024-11-19 09:48:06,057 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 58 transitions, 234 flow, removed 6 selfloop flow, removed 7 redundant places. [2024-11-19 09:48:06,059 INFO L231 Difference]: Finished difference. Result has 58 places, 58 transitions, 134 flow [2024-11-19 09:48:06,059 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=126, PETRI_DIFFERENCE_MINUEND_PLACES=55, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=134, PETRI_PLACES=58, PETRI_TRANSITIONS=58} [2024-11-19 09:48:06,060 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -8 predicate places. [2024-11-19 09:48:06,060 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 58 transitions, 134 flow [2024-11-19 09:48:06,060 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.25) internal successors, (49), 4 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:06,060 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:48:06,060 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:48:06,060 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-19 09:48:06,060 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-19 09:48:06,061 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:48:06,061 INFO L85 PathProgramCache]: Analyzing trace with hash 131630981, now seen corresponding path program 1 times [2024-11-19 09:48:06,061 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:48:06,062 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [294121402] [2024-11-19 09:48:06,062 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:48:06,062 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:48:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:48:06,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:06,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:48:06,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [294121402] [2024-11-19 09:48:06,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [294121402] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:48:06,158 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:48:06,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:48:06,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [71538995] [2024-11-19 09:48:06,159 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:48:06,159 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:48:06,160 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:48:06,160 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:48:06,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:48:06,164 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2024-11-19 09:48:06,164 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 58 transitions, 134 flow. Second operand has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:06,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:48:06,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2024-11-19 09:48:06,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:48:07,463 INFO L124 PetriNetUnfolderBase]: 19694/26750 cut-off events. [2024-11-19 09:48:07,463 INFO L125 PetriNetUnfolderBase]: For 286/286 co-relation queries the response was YES. [2024-11-19 09:48:07,508 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54203 conditions, 26750 events. 19694/26750 cut-off events. For 286/286 co-relation queries the response was YES. Maximal size of possible extension queue 904. Compared 147011 event pairs, 11285 based on Foata normal form. 391/22816 useless extension candidates. Maximal degree in co-relation 30487. Up to 15038 conditions per place. [2024-11-19 09:48:07,812 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 121 selfloop transitions, 4 changer transitions 0/129 dead transitions. [2024-11-19 09:48:07,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 62 places, 129 transitions, 543 flow [2024-11-19 09:48:07,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:48:07,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:48:07,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 179 transitions. [2024-11-19 09:48:07,815 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49722222222222223 [2024-11-19 09:48:07,815 INFO L175 Difference]: Start difference. First operand has 58 places, 58 transitions, 134 flow. Second operand 5 states and 179 transitions. [2024-11-19 09:48:07,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 62 places, 129 transitions, 543 flow [2024-11-19 09:48:07,816 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 60 places, 129 transitions, 538 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:48:07,818 INFO L231 Difference]: Finished difference. Result has 62 places, 59 transitions, 148 flow [2024-11-19 09:48:07,818 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=129, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=148, PETRI_PLACES=62, PETRI_TRANSITIONS=59} [2024-11-19 09:48:07,819 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, -4 predicate places. [2024-11-19 09:48:07,819 INFO L471 AbstractCegarLoop]: Abstraction has has 62 places, 59 transitions, 148 flow [2024-11-19 09:48:07,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 12.8) internal successors, (64), 5 states have internal predecessors, (64), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:07,820 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:48:07,820 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:48:07,820 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-19 09:48:07,820 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-19 09:48:07,820 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:48:07,821 INFO L85 PathProgramCache]: Analyzing trace with hash -1110882817, now seen corresponding path program 1 times [2024-11-19 09:48:07,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:48:07,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200671681] [2024-11-19 09:48:07,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:48:07,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:48:07,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:48:07,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:07,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:48:07,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200671681] [2024-11-19 09:48:07,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1200671681] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:48:07,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:48:07,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:48:07,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117767747] [2024-11-19 09:48:07,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:48:07,931 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:48:07,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:48:07,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:48:07,932 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:48:07,936 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2024-11-19 09:48:07,938 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 62 places, 59 transitions, 148 flow. Second operand has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:07,938 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:48:07,938 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2024-11-19 09:48:07,938 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:48:09,174 INFO L124 PetriNetUnfolderBase]: 14906/20425 cut-off events. [2024-11-19 09:48:09,174 INFO L125 PetriNetUnfolderBase]: For 1503/1503 co-relation queries the response was YES. [2024-11-19 09:48:09,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 42939 conditions, 20425 events. 14906/20425 cut-off events. For 1503/1503 co-relation queries the response was YES. Maximal size of possible extension queue 707. Compared 108446 event pairs, 11441 based on Foata normal form. 432/17570 useless extension candidates. Maximal degree in co-relation 31748. Up to 15082 conditions per place. [2024-11-19 09:48:09,268 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 90 selfloop transitions, 4 changer transitions 4/102 dead transitions. [2024-11-19 09:48:09,268 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 102 transitions, 445 flow [2024-11-19 09:48:09,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:48:09,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:48:09,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 154 transitions. [2024-11-19 09:48:09,270 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.42777777777777776 [2024-11-19 09:48:09,270 INFO L175 Difference]: Start difference. First operand has 62 places, 59 transitions, 148 flow. Second operand 5 states and 154 transitions. [2024-11-19 09:48:09,270 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 102 transitions, 445 flow [2024-11-19 09:48:09,273 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 102 transitions, 440 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:48:09,275 INFO L231 Difference]: Finished difference. Result has 66 places, 60 transitions, 166 flow [2024-11-19 09:48:09,275 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=143, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=166, PETRI_PLACES=66, PETRI_TRANSITIONS=60} [2024-11-19 09:48:09,276 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 0 predicate places. [2024-11-19 09:48:09,276 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 60 transitions, 166 flow [2024-11-19 09:48:09,276 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.0) internal successors, (65), 5 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:09,276 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:48:09,277 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:48:09,277 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-19 09:48:09,277 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-19 09:48:09,277 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:48:09,278 INFO L85 PathProgramCache]: Analyzing trace with hash -689451504, now seen corresponding path program 1 times [2024-11-19 09:48:09,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:48:09,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942134646] [2024-11-19 09:48:09,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:48:09,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:48:09,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:48:09,369 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:09,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:48:09,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942134646] [2024-11-19 09:48:09,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [942134646] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:48:09,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [532332169] [2024-11-19 09:48:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:48:09,370 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:48:09,370 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:48:09,372 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:48:09,373 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-19 09:48:09,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:48:09,449 INFO L255 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 09:48:09,450 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:48:09,522 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:09,522 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:48:09,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:09,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [532332169] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:48:09,580 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:48:09,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-19 09:48:09,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205810164] [2024-11-19 09:48:09,581 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:48:09,581 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 09:48:09,582 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:48:09,583 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 09:48:09,583 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:48:09,596 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2024-11-19 09:48:09,596 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 60 transitions, 166 flow. Second operand has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:09,596 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:48:09,596 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2024-11-19 09:48:09,597 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:48:11,456 INFO L124 PetriNetUnfolderBase]: 23412/32029 cut-off events. [2024-11-19 09:48:11,457 INFO L125 PetriNetUnfolderBase]: For 3097/3097 co-relation queries the response was YES. [2024-11-19 09:48:11,544 INFO L83 FinitePrefix]: Finished finitePrefix Result has 69768 conditions, 32029 events. 23412/32029 cut-off events. For 3097/3097 co-relation queries the response was YES. Maximal size of possible extension queue 1004. Compared 184147 event pairs, 9882 based on Foata normal form. 391/27350 useless extension candidates. Maximal degree in co-relation 58577. Up to 13384 conditions per place. [2024-11-19 09:48:11,863 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 148 selfloop transitions, 10 changer transitions 0/162 dead transitions. [2024-11-19 09:48:11,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 73 places, 162 transitions, 746 flow [2024-11-19 09:48:11,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:48:11,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:48:11,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 245 transitions. [2024-11-19 09:48:11,866 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4253472222222222 [2024-11-19 09:48:11,866 INFO L175 Difference]: Start difference. First operand has 66 places, 60 transitions, 166 flow. Second operand 8 states and 245 transitions. [2024-11-19 09:48:11,866 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 73 places, 162 transitions, 746 flow [2024-11-19 09:48:11,876 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 162 transitions, 741 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-19 09:48:11,877 INFO L231 Difference]: Finished difference. Result has 74 places, 62 transitions, 206 flow [2024-11-19 09:48:11,878 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=161, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=206, PETRI_PLACES=74, PETRI_TRANSITIONS=62} [2024-11-19 09:48:11,878 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 8 predicate places. [2024-11-19 09:48:11,878 INFO L471 AbstractCegarLoop]: Abstraction has has 74 places, 62 transitions, 206 flow [2024-11-19 09:48:11,879 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.25) internal successors, (159), 12 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:11,879 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:48:11,879 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:48:11,899 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-19 09:48:12,079 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-19 09:48:12,080 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-19 09:48:12,080 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:48:12,081 INFO L85 PathProgramCache]: Analyzing trace with hash -794636076, now seen corresponding path program 1 times [2024-11-19 09:48:12,081 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:48:12,081 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2000209829] [2024-11-19 09:48:12,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:48:12,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:48:12,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:48:12,173 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:12,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:48:12,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2000209829] [2024-11-19 09:48:12,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2000209829] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:48:12,175 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312966848] [2024-11-19 09:48:12,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:48:12,175 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:48:12,175 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:48:12,177 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:48:12,179 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-19 09:48:12,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:48:12,256 INFO L255 TraceCheckSpWp]: Trace formula consists of 131 conjuncts, 7 conjuncts are in the unsatisfiable core [2024-11-19 09:48:12,258 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:48:12,328 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:12,329 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:48:12,389 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:12,389 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [312966848] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:48:12,389 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:48:12,390 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 10 [2024-11-19 09:48:12,390 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295580997] [2024-11-19 09:48:12,390 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:48:12,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-11-19 09:48:12,391 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:48:12,391 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-11-19 09:48:12,391 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=88, Unknown=0, NotChecked=0, Total=132 [2024-11-19 09:48:12,408 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2024-11-19 09:48:12,409 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 62 transitions, 206 flow. Second operand has 12 states, 12 states have (on average 13.666666666666666) internal successors, (164), 12 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:12,409 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:48:12,409 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2024-11-19 09:48:12,409 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:48:13,817 INFO L124 PetriNetUnfolderBase]: 18228/25344 cut-off events. [2024-11-19 09:48:13,817 INFO L125 PetriNetUnfolderBase]: For 6833/6833 co-relation queries the response was YES. [2024-11-19 09:48:13,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 57483 conditions, 25344 events. 18228/25344 cut-off events. For 6833/6833 co-relation queries the response was YES. Maximal size of possible extension queue 775. Compared 142273 event pairs, 9011 based on Foata normal form. 612/22104 useless extension candidates. Maximal degree in co-relation 39430. Up to 10410 conditions per place. [2024-11-19 09:48:13,939 INFO L140 encePairwiseOnDemand]: 61/72 looper letters, 111 selfloop transitions, 11 changer transitions 4/130 dead transitions. [2024-11-19 09:48:13,939 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 130 transitions, 640 flow [2024-11-19 09:48:13,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-19 09:48:13,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-19 09:48:13,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 219 transitions. [2024-11-19 09:48:13,941 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3802083333333333 [2024-11-19 09:48:13,941 INFO L175 Difference]: Start difference. First operand has 74 places, 62 transitions, 206 flow. Second operand 8 states and 219 transitions. [2024-11-19 09:48:13,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 130 transitions, 640 flow [2024-11-19 09:48:13,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 77 places, 130 transitions, 618 flow, removed 6 selfloop flow, removed 4 redundant places. [2024-11-19 09:48:13,951 INFO L231 Difference]: Finished difference. Result has 81 places, 65 transitions, 257 flow [2024-11-19 09:48:13,951 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=191, PETRI_DIFFERENCE_MINUEND_PLACES=70, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=257, PETRI_PLACES=81, PETRI_TRANSITIONS=65} [2024-11-19 09:48:13,952 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 15 predicate places. [2024-11-19 09:48:13,952 INFO L471 AbstractCegarLoop]: Abstraction has has 81 places, 65 transitions, 257 flow [2024-11-19 09:48:13,952 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 13.666666666666666) internal successors, (164), 12 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:13,953 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:48:13,953 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:48:13,972 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-19 09:48:14,153 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:48:14,154 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-19 09:48:14,154 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:48:14,154 INFO L85 PathProgramCache]: Analyzing trace with hash 524262875, now seen corresponding path program 2 times [2024-11-19 09:48:14,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:48:14,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1367153149] [2024-11-19 09:48:14,154 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:48:14,155 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:48:14,170 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:48:14,170 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:48:14,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:48:14,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:48:14,329 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1367153149] [2024-11-19 09:48:14,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1367153149] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:48:14,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:48:14,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:48:14,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [151324718] [2024-11-19 09:48:14,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:48:14,331 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:48:14,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:48:14,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:48:14,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:48:14,341 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2024-11-19 09:48:14,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 81 places, 65 transitions, 257 flow. Second operand has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 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) [2024-11-19 09:48:14,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:48:14,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2024-11-19 09:48:14,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:48:16,516 INFO L124 PetriNetUnfolderBase]: 24944/34337 cut-off events. [2024-11-19 09:48:16,517 INFO L125 PetriNetUnfolderBase]: For 12294/12294 co-relation queries the response was YES. [2024-11-19 09:48:16,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 83451 conditions, 34337 events. 24944/34337 cut-off events. For 12294/12294 co-relation queries the response was YES. Maximal size of possible extension queue 828. Compared 197248 event pairs, 10774 based on Foata normal form. 0/29146 useless extension candidates. Maximal degree in co-relation 61669. Up to 17334 conditions per place. [2024-11-19 09:48:16,684 INFO L140 encePairwiseOnDemand]: 67/72 looper letters, 95 selfloop transitions, 8 changer transitions 0/107 dead transitions. [2024-11-19 09:48:16,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 85 places, 107 transitions, 614 flow [2024-11-19 09:48:16,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:48:16,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:48:16,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 142 transitions. [2024-11-19 09:48:16,686 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.39444444444444443 [2024-11-19 09:48:16,686 INFO L175 Difference]: Start difference. First operand has 81 places, 65 transitions, 257 flow. Second operand 5 states and 142 transitions. [2024-11-19 09:48:16,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 85 places, 107 transitions, 614 flow [2024-11-19 09:48:16,697 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 107 transitions, 584 flow, removed 10 selfloop flow, removed 4 redundant places. [2024-11-19 09:48:16,698 INFO L231 Difference]: Finished difference. Result has 82 places, 66 transitions, 266 flow [2024-11-19 09:48:16,699 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=238, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=65, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=266, PETRI_PLACES=82, PETRI_TRANSITIONS=66} [2024-11-19 09:48:16,699 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 16 predicate places. [2024-11-19 09:48:16,699 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 66 transitions, 266 flow [2024-11-19 09:48:16,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.2) internal successors, (66), 5 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) [2024-11-19 09:48:16,700 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:48:16,700 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:48:16,700 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-19 09:48:16,700 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-19 09:48:16,700 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:48:16,700 INFO L85 PathProgramCache]: Analyzing trace with hash -1824195991, now seen corresponding path program 2 times [2024-11-19 09:48:16,701 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:48:16,701 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7371769] [2024-11-19 09:48:16,701 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:48:16,701 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:48:16,718 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-19 09:48:16,719 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:48:16,887 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-19 09:48:16,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:48:16,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7371769] [2024-11-19 09:48:16,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [7371769] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:48:16,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:48:16,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:48:16,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1794005210] [2024-11-19 09:48:16,889 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:48:16,889 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:48:16,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:48:16,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:48:16,890 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:48:16,898 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2024-11-19 09:48:16,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 66 transitions, 266 flow. Second operand has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:16,899 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:48:16,899 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2024-11-19 09:48:16,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:48:19,822 INFO L124 PetriNetUnfolderBase]: 32963/45360 cut-off events. [2024-11-19 09:48:19,823 INFO L125 PetriNetUnfolderBase]: For 20191/20191 co-relation queries the response was YES. [2024-11-19 09:48:19,949 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110887 conditions, 45360 events. 32963/45360 cut-off events. For 20191/20191 co-relation queries the response was YES. Maximal size of possible extension queue 1000. Compared 261208 event pairs, 16222 based on Foata normal form. 0/38496 useless extension candidates. Maximal degree in co-relation 88646. Up to 23855 conditions per place. [2024-11-19 09:48:20,061 INFO L140 encePairwiseOnDemand]: 65/72 looper letters, 94 selfloop transitions, 9 changer transitions 0/107 dead transitions. [2024-11-19 09:48:20,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 107 transitions, 624 flow [2024-11-19 09:48:20,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-19 09:48:20,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-19 09:48:20,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 140 transitions. [2024-11-19 09:48:20,063 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3888888888888889 [2024-11-19 09:48:20,063 INFO L175 Difference]: Start difference. First operand has 82 places, 66 transitions, 266 flow. Second operand 5 states and 140 transitions. [2024-11-19 09:48:20,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 107 transitions, 624 flow [2024-11-19 09:48:20,087 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 107 transitions, 600 flow, removed 4 selfloop flow, removed 3 redundant places. [2024-11-19 09:48:20,089 INFO L231 Difference]: Finished difference. Result has 84 places, 68 transitions, 293 flow [2024-11-19 09:48:20,090 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=293, PETRI_PLACES=84, PETRI_TRANSITIONS=68} [2024-11-19 09:48:20,090 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 18 predicate places. [2024-11-19 09:48:20,090 INFO L471 AbstractCegarLoop]: Abstraction has has 84 places, 68 transitions, 293 flow [2024-11-19 09:48:20,091 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 13.4) internal successors, (67), 5 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:20,091 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:48:20,091 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:48:20,091 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-19 09:48:20,091 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-19 09:48:20,093 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:48:20,093 INFO L85 PathProgramCache]: Analyzing trace with hash 433292599, now seen corresponding path program 1 times [2024-11-19 09:48:20,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:48:20,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781690744] [2024-11-19 09:48:20,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:48:20,094 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:48:20,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:48:20,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:20,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:48:20,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781690744] [2024-11-19 09:48:20,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [781690744] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:48:20,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509461223] [2024-11-19 09:48:20,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:48:20,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:48:20,217 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:48:20,219 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:48:20,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-19 09:48:20,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:48:20,311 INFO L255 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 09:48:20,312 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:48:20,416 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:20,416 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:48:20,503 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:20,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [509461223] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:48:20,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:48:20,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-11-19 09:48:20,504 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [475645291] [2024-11-19 09:48:20,504 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:48:20,504 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:48:20,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:48:20,505 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:48:20,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:48:20,527 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2024-11-19 09:48:20,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 68 transitions, 293 flow. Second operand has 17 states, 17 states have (on average 13.411764705882353) internal successors, (228), 17 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:20,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:48:20,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2024-11-19 09:48:20,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:48:25,925 INFO L124 PetriNetUnfolderBase]: 56306/77114 cut-off events. [2024-11-19 09:48:25,926 INFO L125 PetriNetUnfolderBase]: For 36244/36244 co-relation queries the response was YES. [2024-11-19 09:48:26,180 INFO L83 FinitePrefix]: Finished finitePrefix Result has 192270 conditions, 77114 events. 56306/77114 cut-off events. For 36244/36244 co-relation queries the response was YES. Maximal size of possible extension queue 1806. Compared 479823 event pairs, 19888 based on Foata normal form. 568/66342 useless extension candidates. Maximal degree in co-relation 170071. Up to 25890 conditions per place. [2024-11-19 09:48:26,403 INFO L140 encePairwiseOnDemand]: 64/72 looper letters, 245 selfloop transitions, 16 changer transitions 0/265 dead transitions. [2024-11-19 09:48:26,404 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 265 transitions, 1586 flow [2024-11-19 09:48:26,404 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 09:48:26,404 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 09:48:26,405 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 350 transitions. [2024-11-19 09:48:26,406 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.44191919191919193 [2024-11-19 09:48:26,406 INFO L175 Difference]: Start difference. First operand has 84 places, 68 transitions, 293 flow. Second operand 11 states and 350 transitions. [2024-11-19 09:48:26,406 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 265 transitions, 1586 flow [2024-11-19 09:48:26,447 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 91 places, 265 transitions, 1504 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-11-19 09:48:26,450 INFO L231 Difference]: Finished difference. Result has 96 places, 75 transitions, 376 flow [2024-11-19 09:48:26,450 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=272, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=68, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=54, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=376, PETRI_PLACES=96, PETRI_TRANSITIONS=75} [2024-11-19 09:48:26,451 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 30 predicate places. [2024-11-19 09:48:26,451 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 75 transitions, 376 flow [2024-11-19 09:48:26,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.411764705882353) internal successors, (228), 17 states have internal predecessors, (228), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:26,451 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:48:26,451 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:48:26,464 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-19 09:48:26,652 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:48:26,652 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-19 09:48:26,653 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:48:26,653 INFO L85 PathProgramCache]: Analyzing trace with hash 462494981, now seen corresponding path program 1 times [2024-11-19 09:48:26,653 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:48:26,653 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704480786] [2024-11-19 09:48:26,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:48:26,653 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:48:26,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:48:26,784 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:26,785 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:48:26,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704480786] [2024-11-19 09:48:26,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [704480786] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:48:26,785 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1408484724] [2024-11-19 09:48:26,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-19 09:48:26,786 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:48:26,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:48:26,788 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:48:26,789 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-19 09:48:26,878 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-19 09:48:26,882 INFO L255 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-19 09:48:26,883 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:48:26,993 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:26,993 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:48:27,090 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:27,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1408484724] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:48:27,091 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:48:27,091 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 15 [2024-11-19 09:48:27,091 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1249517290] [2024-11-19 09:48:27,091 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:48:27,095 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-19 09:48:27,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:48:27,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-19 09:48:27,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2024-11-19 09:48:27,118 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2024-11-19 09:48:27,119 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 75 transitions, 376 flow. Second operand has 17 states, 17 states have (on average 13.705882352941176) internal successors, (233), 17 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:27,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:48:27,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2024-11-19 09:48:27,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:48:32,090 INFO L124 PetriNetUnfolderBase]: 51896/71503 cut-off events. [2024-11-19 09:48:32,090 INFO L125 PetriNetUnfolderBase]: For 46829/46829 co-relation queries the response was YES. [2024-11-19 09:48:32,415 INFO L83 FinitePrefix]: Finished finitePrefix Result has 180876 conditions, 71503 events. 51896/71503 cut-off events. For 46829/46829 co-relation queries the response was YES. Maximal size of possible extension queue 1658. Compared 439232 event pairs, 16118 based on Foata normal form. 780/62125 useless extension candidates. Maximal degree in co-relation 157058. Up to 18797 conditions per place. [2024-11-19 09:48:32,620 INFO L140 encePairwiseOnDemand]: 61/72 looper letters, 187 selfloop transitions, 20 changer transitions 4/215 dead transitions. [2024-11-19 09:48:32,621 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 106 places, 215 transitions, 1312 flow [2024-11-19 09:48:32,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-19 09:48:32,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-19 09:48:32,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 313 transitions. [2024-11-19 09:48:32,622 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.3952020202020202 [2024-11-19 09:48:32,622 INFO L175 Difference]: Start difference. First operand has 96 places, 75 transitions, 376 flow. Second operand 11 states and 313 transitions. [2024-11-19 09:48:32,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 106 places, 215 transitions, 1312 flow [2024-11-19 09:48:32,664 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 215 transitions, 1302 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-11-19 09:48:32,666 INFO L231 Difference]: Finished difference. Result has 107 places, 84 transitions, 501 flow [2024-11-19 09:48:32,666 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=368, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=57, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=501, PETRI_PLACES=107, PETRI_TRANSITIONS=84} [2024-11-19 09:48:32,666 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 41 predicate places. [2024-11-19 09:48:32,667 INFO L471 AbstractCegarLoop]: Abstraction has has 107 places, 84 transitions, 501 flow [2024-11-19 09:48:32,667 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 13.705882352941176) internal successors, (233), 17 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:32,667 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:48:32,667 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:48:32,680 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2024-11-19 09:48:32,867 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-19 09:48:32,868 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting thread4Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-19 09:48:33,145 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:48:33,145 INFO L85 PathProgramCache]: Analyzing trace with hash -1587212094, now seen corresponding path program 2 times [2024-11-19 09:48:33,146 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:48:33,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624981482] [2024-11-19 09:48:33,146 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:48:33,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:48:33,182 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:48:33,182 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:48:33,396 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-19 09:48:33,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:48:33,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624981482] [2024-11-19 09:48:33,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624981482] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-19 09:48:33,398 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1766651975] [2024-11-19 09:48:33,398 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:48:33,398 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:48:33,398 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-19 09:48:33,400 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-19 09:48:33,402 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-19 09:48:33,491 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:48:33,491 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:48:33,492 INFO L255 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-11-19 09:48:33,494 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-19 09:48:33,630 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:33,630 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-19 09:48:33,749 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2024-11-19 09:48:33,826 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 6 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-19 09:48:33,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1766651975] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-19 09:48:33,826 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-19 09:48:33,826 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 18 [2024-11-19 09:48:33,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196404186] [2024-11-19 09:48:33,827 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-19 09:48:33,827 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2024-11-19 09:48:33,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:48:33,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2024-11-19 09:48:33,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=322, Unknown=0, NotChecked=0, Total=380 [2024-11-19 09:48:33,909 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2024-11-19 09:48:33,909 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 107 places, 84 transitions, 501 flow. Second operand has 20 states, 20 states have (on average 13.7) internal successors, (274), 20 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:33,909 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:48:33,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2024-11-19 09:48:33,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-19 09:48:40,171 INFO L124 PetriNetUnfolderBase]: 61574/84428 cut-off events. [2024-11-19 09:48:40,172 INFO L125 PetriNetUnfolderBase]: For 74992/74992 co-relation queries the response was YES. [2024-11-19 09:48:40,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 223690 conditions, 84428 events. 61574/84428 cut-off events. For 74992/74992 co-relation queries the response was YES. Maximal size of possible extension queue 1720. Compared 530727 event pairs, 5099 based on Foata normal form. 0/72962 useless extension candidates. Maximal degree in co-relation 198622. Up to 31584 conditions per place. [2024-11-19 09:48:40,823 INFO L140 encePairwiseOnDemand]: 66/72 looper letters, 254 selfloop transitions, 14 changer transitions 0/272 dead transitions. [2024-11-19 09:48:40,823 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 272 transitions, 1768 flow [2024-11-19 09:48:40,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-19 09:48:40,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-11-19 09:48:40,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 366 transitions. [2024-11-19 09:48:40,825 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4236111111111111 [2024-11-19 09:48:40,825 INFO L175 Difference]: Start difference. First operand has 107 places, 84 transitions, 501 flow. Second operand 12 states and 366 transitions. [2024-11-19 09:48:40,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 272 transitions, 1768 flow [2024-11-19 09:48:41,113 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 272 transitions, 1741 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-11-19 09:48:41,115 INFO L231 Difference]: Finished difference. Result has 114 places, 84 transitions, 516 flow [2024-11-19 09:48:41,115 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=72, PETRI_DIFFERENCE_MINUEND_FLOW=478, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=83, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=13, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=69, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=516, PETRI_PLACES=114, PETRI_TRANSITIONS=84} [2024-11-19 09:48:41,115 INFO L277 CegarLoopForPetriNet]: 66 programPoint places, 48 predicate places. [2024-11-19 09:48:41,116 INFO L471 AbstractCegarLoop]: Abstraction has has 114 places, 84 transitions, 516 flow [2024-11-19 09:48:41,116 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 13.7) internal successors, (274), 20 states have internal predecessors, (274), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:41,116 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-19 09:48:41,116 INFO L204 CegarLoopForPetriNet]: trace histogram [3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-19 09:48:41,128 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-19 09:48:41,316 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-19 09:48:41,317 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err3INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread1Err5INUSE_VIOLATIONSUFFICIENT_THREAD_INSTANCES, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 19 more)] === [2024-11-19 09:48:41,317 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-19 09:48:41,318 INFO L85 PathProgramCache]: Analyzing trace with hash -2043608358, now seen corresponding path program 2 times [2024-11-19 09:48:41,318 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-19 09:48:41,318 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258776958] [2024-11-19 09:48:41,318 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-19 09:48:41,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-19 09:48:41,351 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-19 09:48:41,352 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-19 09:48:41,537 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-19 09:48:41,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-19 09:48:41,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258776958] [2024-11-19 09:48:41,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258776958] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-19 09:48:41,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-19 09:48:41,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-19 09:48:41,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2055778541] [2024-11-19 09:48:41,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-19 09:48:41,539 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-19 09:48:41,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-19 09:48:41,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-19 09:48:41,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-19 09:48:41,547 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 11 out of 72 [2024-11-19 09:48:41,547 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 114 places, 84 transitions, 516 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-19 09:48:41,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-19 09:48:41,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 11 of 72 [2024-11-19 09:48:41,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand