./Ultimate.py --spec ../sv-benchmarks/c/properties/valid-memsafety.prp --file ../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version c7c6ca5d 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/popl20-bad-buffer-mult-alt.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 2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f --- Real Ultimate output --- This is Ultimate 0.2.5-?-c7c6ca5-m [2024-11-09 10:50:22,252 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-09 10:50:22,349 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-09 10:50:22,354 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-09 10:50:22,356 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-09 10:50:22,386 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-09 10:50:22,387 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-09 10:50:22,387 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-09 10:50:22,388 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-09 10:50:22,389 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-09 10:50:22,389 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-09 10:50:22,390 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-09 10:50:22,390 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-09 10:50:22,391 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-09 10:50:22,391 INFO L153 SettingsManager]: * Use SBE=true [2024-11-09 10:50:22,392 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-09 10:50:22,392 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-09 10:50:22,392 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-09 10:50:22,393 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-09 10:50:22,393 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-09 10:50:22,394 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-09 10:50:22,394 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-09 10:50:22,395 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-09 10:50:22,395 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-09 10:50:22,395 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-09 10:50:22,396 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-09 10:50:22,396 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-09 10:50:22,396 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-09 10:50:22,397 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-09 10:50:22,397 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-09 10:50:22,397 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-09 10:50:22,398 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-09 10:50:22,398 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-09 10:50:22,398 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:50:22,399 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-09 10:50:22,399 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-09 10:50:22,399 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-09 10:50:22,400 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-09 10:50:22,400 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-09 10:50:22,400 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-09 10:50:22,400 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-09 10:50:22,401 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-09 10:50:22,401 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 2e9e4bd6e9b16aa5f22ad2335ca34ba741869a12ab5a04a80108cf42ed170c0f [2024-11-09 10:50:22,647 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-09 10:50:22,668 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-09 10:50:22,671 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-09 10:50:22,672 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-09 10:50:22,673 INFO L274 PluginConnector]: CDTParser initialized [2024-11-09 10:50:22,674 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-11-09 10:50:24,198 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-09 10:50:24,390 INFO L384 CDTParser]: Found 1 translation units. [2024-11-09 10:50:24,391 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/weaver/popl20-bad-buffer-mult-alt.wvr.c [2024-11-09 10:50:24,400 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ec7a50b8/61d1fd0b2f124a94a4a73995828f8176/FLAG69dc99c2a [2024-11-09 10:50:24,786 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/8ec7a50b8/61d1fd0b2f124a94a4a73995828f8176 [2024-11-09 10:50:24,789 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-09 10:50:24,790 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-09 10:50:24,792 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-09 10:50:24,792 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-09 10:50:24,797 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-09 10:50:24,798 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:50:24" (1/1) ... [2024-11-09 10:50:24,801 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@766ab5d0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:24, skipping insertion in model container [2024-11-09 10:50:24,801 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.11 10:50:24" (1/1) ... [2024-11-09 10:50:24,832 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-09 10:50:25,024 WARN L1070 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-09 10:50:25,028 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:50:25,037 INFO L200 MainTranslator]: Completed pre-run [2024-11-09 10:50:25,074 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-09 10:50:25,093 INFO L204 MainTranslator]: Completed translation [2024-11-09 10:50:25,094 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:25 WrapperNode [2024-11-09 10:50:25,094 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-09 10:50:25,095 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-09 10:50:25,095 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-09 10:50:25,095 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-09 10:50:25,102 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:25" (1/1) ... [2024-11-09 10:50:25,110 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:25" (1/1) ... [2024-11-09 10:50:25,161 INFO L138 Inliner]: procedures = 25, calls = 60, calls flagged for inlining = 18, calls inlined = 22, statements flattened = 313 [2024-11-09 10:50:25,162 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-09 10:50:25,162 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-09 10:50:25,163 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-09 10:50:25,163 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-09 10:50:25,175 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:25" (1/1) ... [2024-11-09 10:50:25,176 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:25" (1/1) ... [2024-11-09 10:50:25,189 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:25" (1/1) ... [2024-11-09 10:50:25,222 INFO L175 MemorySlicer]: Split 8 memory accesses to 2 slices as follows [2, 6]. 75 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 2 writes are split as follows [0, 2]. [2024-11-09 10:50:25,223 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:25" (1/1) ... [2024-11-09 10:50:25,223 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:25" (1/1) ... [2024-11-09 10:50:25,237 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:25" (1/1) ... [2024-11-09 10:50:25,251 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:25" (1/1) ... [2024-11-09 10:50:25,253 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:25" (1/1) ... [2024-11-09 10:50:25,255 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:25" (1/1) ... [2024-11-09 10:50:25,264 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-09 10:50:25,265 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-09 10:50:25,265 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-09 10:50:25,265 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-09 10:50:25,266 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:25" (1/1) ... [2024-11-09 10:50:25,284 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-09 10:50:25,297 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:25,316 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) [2024-11-09 10:50:25,320 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 [2024-11-09 10:50:25,368 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-09 10:50:25,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-09 10:50:25,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-09 10:50:25,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-09 10:50:25,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-09 10:50:25,369 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-09 10:50:25,369 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-09 10:50:25,370 INFO L130 BoogieDeclarations]: Found specification of procedure thread4 [2024-11-09 10:50:25,370 INFO L138 BoogieDeclarations]: Found implementation of procedure thread4 [2024-11-09 10:50:25,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-09 10:50:25,371 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-09 10:50:25,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-09 10:50:25,372 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-09 10:50:25,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-09 10:50:25,372 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-09 10:50:25,372 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-09 10:50:25,372 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-09 10:50:25,372 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-09 10:50:25,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-09 10:50:25,373 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-09 10:50:25,375 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-09 10:50:25,535 INFO L238 CfgBuilder]: Building ICFG [2024-11-09 10:50:25,539 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-09 10:50:26,036 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-09 10:50:26,036 INFO L287 CfgBuilder]: Performing block encoding [2024-11-09 10:50:26,489 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-09 10:50:26,490 INFO L316 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-09 10:50:26,490 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:50:26 BoogieIcfgContainer [2024-11-09 10:50:26,490 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-09 10:50:26,492 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-09 10:50:26,492 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-09 10:50:26,497 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-09 10:50:26,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.11 10:50:24" (1/3) ... [2024-11-09 10:50:26,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d39057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:50:26, skipping insertion in model container [2024-11-09 10:50:26,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.11 10:50:25" (2/3) ... [2024-11-09 10:50:26,498 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@4d39057 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.11 10:50:26, skipping insertion in model container [2024-11-09 10:50:26,498 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.11 10:50:26" (3/3) ... [2024-11-09 10:50:26,499 INFO L112 eAbstractionObserver]: Analyzing ICFG popl20-bad-buffer-mult-alt.wvr.c [2024-11-09 10:50:26,516 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-09 10:50:26,516 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-11-09 10:50:26,516 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-09 10:50:26,596 INFO L143 ThreadInstanceAdder]: Constructed 4 joinOtherThreadTransitions. [2024-11-09 10:50:26,637 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 73 places, 66 transitions, 160 flow [2024-11-09 10:50:26,678 INFO L124 PetriNetUnfolderBase]: 6/62 cut-off events. [2024-11-09 10:50:26,679 INFO L125 PetriNetUnfolderBase]: For 4/4 co-relation queries the response was YES. [2024-11-09 10:50:26,684 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79 conditions, 62 events. 6/62 cut-off events. For 4/4 co-relation queries the response was YES. Maximal size of possible extension queue 7. Compared 155 event pairs, 0 based on Foata normal form. 0/42 useless extension candidates. Maximal degree in co-relation 49. Up to 2 conditions per place. [2024-11-09 10:50:26,684 INFO L82 GeneralOperation]: Start removeDead. Operand has 73 places, 66 transitions, 160 flow [2024-11-09 10:50:26,687 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 68 places, 61 transitions, 146 flow [2024-11-09 10:50:26,695 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-09 10:50:26,701 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;@15d98a42, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-09 10:50:26,701 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-11-09 10:50:26,705 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-09 10:50:26,705 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-09 10:50:26,705 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-09 10:50:26,705 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:26,706 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:50:26,706 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:26,711 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:26,712 INFO L85 PathProgramCache]: Analyzing trace with hash 892478, now seen corresponding path program 1 times [2024-11-09 10:50:26,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:26,722 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [181855172] [2024-11-09 10:50:26,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:26,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:26,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:26,999 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:27,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:27,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [181855172] [2024-11-09 10:50:27,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [181855172] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:27,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:27,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-09 10:50:27,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524741536] [2024-11-09 10:50:27,004 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:27,013 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:50:27,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:27,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:50:27,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:50:27,078 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-09 10:50:27,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 61 transitions, 146 flow. Second operand has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:27,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:27,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-09 10:50:27,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:28,913 INFO L124 PetriNetUnfolderBase]: 9651/13484 cut-off events. [2024-11-09 10:50:28,914 INFO L125 PetriNetUnfolderBase]: For 298/298 co-relation queries the response was YES. [2024-11-09 10:50:28,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26018 conditions, 13484 events. 9651/13484 cut-off events. For 298/298 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 88202 event pairs, 6408 based on Foata normal form. 1/7906 useless extension candidates. Maximal degree in co-relation 24428. Up to 11896 conditions per place. [2024-11-09 10:50:29,065 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 36 selfloop transitions, 2 changer transitions 0/57 dead transitions. [2024-11-09 10:50:29,067 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 214 flow [2024-11-09 10:50:29,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:50:29,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:50:29,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 113 transitions. [2024-11-09 10:50:29,080 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5707070707070707 [2024-11-09 10:50:29,082 INFO L175 Difference]: Start difference. First operand has 68 places, 61 transitions, 146 flow. Second operand 3 states and 113 transitions. [2024-11-09 10:50:29,083 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 214 flow [2024-11-09 10:50:29,138 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 57 transitions, 198 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-11-09 10:50:29,141 INFO L231 Difference]: Finished difference. Result has 58 places, 57 transitions, 126 flow [2024-11-09 10:50:29,144 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=126, PETRI_PLACES=58, PETRI_TRANSITIONS=57} [2024-11-09 10:50:29,148 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -10 predicate places. [2024-11-09 10:50:29,150 INFO L471 AbstractCegarLoop]: Abstraction has has 58 places, 57 transitions, 126 flow [2024-11-09 10:50:29,150 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 25.0) internal successors, (75), 3 states have internal predecessors, (75), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:29,151 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:29,151 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-09 10:50:29,152 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-09 10:50:29,152 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:29,153 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:29,153 INFO L85 PathProgramCache]: Analyzing trace with hash 892479, now seen corresponding path program 1 times [2024-11-09 10:50:29,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:29,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [726471851] [2024-11-09 10:50:29,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:29,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:29,203 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:29,447 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:29,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:29,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [726471851] [2024-11-09 10:50:29,448 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [726471851] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:29,448 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:29,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:50:29,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076307882] [2024-11-09 10:50:29,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:29,451 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:50:29,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:29,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:50:29,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:50:29,470 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-09 10:50:29,470 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 57 transitions, 126 flow. Second operand has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:29,470 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:29,470 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-09 10:50:29,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:30,923 INFO L124 PetriNetUnfolderBase]: 9652/13487 cut-off events. [2024-11-09 10:50:30,924 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-09 10:50:31,033 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25621 conditions, 13487 events. 9652/13487 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 88350 event pairs, 6408 based on Foata normal form. 0/7906 useless extension candidates. Maximal degree in co-relation 25592. Up to 11905 conditions per place. [2024-11-09 10:50:31,101 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 39 selfloop transitions, 4 changer transitions 0/60 dead transitions. [2024-11-09 10:50:31,102 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 60 transitions, 218 flow [2024-11-09 10:50:31,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:50:31,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:50:31,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 140 transitions. [2024-11-09 10:50:31,106 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5303030303030303 [2024-11-09 10:50:31,107 INFO L175 Difference]: Start difference. First operand has 58 places, 57 transitions, 126 flow. Second operand 4 states and 140 transitions. [2024-11-09 10:50:31,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 60 transitions, 218 flow [2024-11-09 10:50:31,108 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 59 places, 60 transitions, 214 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:50:31,111 INFO L231 Difference]: Finished difference. Result has 61 places, 60 transitions, 149 flow [2024-11-09 10:50:31,111 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=122, PETRI_DIFFERENCE_MINUEND_PLACES=56, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=149, PETRI_PLACES=61, PETRI_TRANSITIONS=60} [2024-11-09 10:50:31,112 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -7 predicate places. [2024-11-09 10:50:31,112 INFO L471 AbstractCegarLoop]: Abstraction has has 61 places, 60 transitions, 149 flow [2024-11-09 10:50:31,112 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 24.75) internal successors, (99), 4 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:31,112 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:31,113 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-09 10:50:31,113 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-09 10:50:31,113 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:31,114 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:31,114 INFO L85 PathProgramCache]: Analyzing trace with hash 27668907, now seen corresponding path program 1 times [2024-11-09 10:50:31,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:31,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1140027570] [2024-11-09 10:50:31,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:31,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:31,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:31,340 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:31,341 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:31,341 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1140027570] [2024-11-09 10:50:31,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1140027570] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:31,342 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:31,342 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:50:31,342 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604202834] [2024-11-09 10:50:31,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:31,343 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:50:31,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:31,344 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:50:31,344 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:50:31,363 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-09 10:50:31,364 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 61 places, 60 transitions, 149 flow. Second operand has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:31,365 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:31,365 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-09 10:50:31,365 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:32,820 INFO L124 PetriNetUnfolderBase]: 9653/13490 cut-off events. [2024-11-09 10:50:32,821 INFO L125 PetriNetUnfolderBase]: For 25/25 co-relation queries the response was YES. [2024-11-09 10:50:32,848 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25638 conditions, 13490 events. 9653/13490 cut-off events. For 25/25 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 88382 event pairs, 6408 based on Foata normal form. 0/7908 useless extension candidates. Maximal degree in co-relation 25613. Up to 11904 conditions per place. [2024-11-09 10:50:32,918 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 39 selfloop transitions, 7 changer transitions 0/63 dead transitions. [2024-11-09 10:50:32,919 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 65 places, 63 transitions, 247 flow [2024-11-09 10:50:32,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:50:32,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:50:32,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 167 transitions. [2024-11-09 10:50:32,924 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5060606060606061 [2024-11-09 10:50:32,924 INFO L175 Difference]: Start difference. First operand has 61 places, 60 transitions, 149 flow. Second operand 5 states and 167 transitions. [2024-11-09 10:50:32,924 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 65 places, 63 transitions, 247 flow [2024-11-09 10:50:32,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 63 transitions, 244 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:50:32,927 INFO L231 Difference]: Finished difference. Result has 66 places, 63 transitions, 183 flow [2024-11-09 10:50:32,928 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=146, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=60, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=183, PETRI_PLACES=66, PETRI_TRANSITIONS=63} [2024-11-09 10:50:32,929 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2024-11-09 10:50:32,930 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 63 transitions, 183 flow [2024-11-09 10:50:32,930 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 24.8) internal successors, (124), 5 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:32,930 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:32,930 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-09 10:50:32,930 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-09 10:50:32,931 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:32,931 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:32,931 INFO L85 PathProgramCache]: Analyzing trace with hash 857701820, now seen corresponding path program 1 times [2024-11-09 10:50:32,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:32,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415831009] [2024-11-09 10:50:32,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:32,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:33,149 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:33,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:33,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415831009] [2024-11-09 10:50:33,150 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415831009] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:33,150 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [592896015] [2024-11-09 10:50:33,150 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:33,150 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:33,150 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:33,159 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) [2024-11-09 10:50:33,166 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-09 10:50:33,255 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:33,257 INFO L255 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-09 10:50:33,263 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:33,347 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 [2024-11-09 10:50:33,563 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:33,563 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:33,695 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:33,695 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [592896015] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:33,696 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:33,696 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-09 10:50:33,696 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696411425] [2024-11-09 10:50:33,696 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:33,697 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-09 10:50:33,697 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:33,699 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-09 10:50:33,699 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-09 10:50:33,771 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-09 10:50:33,771 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 63 transitions, 183 flow. Second operand has 11 states, 11 states have (on average 25.363636363636363) internal successors, (279), 11 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:33,772 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:33,772 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-09 10:50:33,772 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:35,294 INFO L124 PetriNetUnfolderBase]: 9653/13489 cut-off events. [2024-11-09 10:50:35,295 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-09 10:50:35,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25651 conditions, 13489 events. 9653/13489 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 88101 event pairs, 6408 based on Foata normal form. 0/7910 useless extension candidates. Maximal degree in co-relation 25623. Up to 11904 conditions per place. [2024-11-09 10:50:35,388 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 38 selfloop transitions, 7 changer transitions 0/62 dead transitions. [2024-11-09 10:50:35,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 62 transitions, 269 flow [2024-11-09 10:50:35,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:50:35,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:50:35,390 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 187 transitions. [2024-11-09 10:50:35,391 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.4722222222222222 [2024-11-09 10:50:35,391 INFO L175 Difference]: Start difference. First operand has 66 places, 63 transitions, 183 flow. Second operand 6 states and 187 transitions. [2024-11-09 10:50:35,391 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 62 transitions, 269 flow [2024-11-09 10:50:35,392 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 69 places, 62 transitions, 268 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:50:35,393 INFO L231 Difference]: Finished difference. Result has 69 places, 62 transitions, 192 flow [2024-11-09 10:50:35,393 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=178, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=62, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=192, PETRI_PLACES=69, PETRI_TRANSITIONS=62} [2024-11-09 10:50:35,394 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2024-11-09 10:50:35,394 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 62 transitions, 192 flow [2024-11-09 10:50:35,395 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 25.363636363636363) internal successors, (279), 11 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:35,395 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:35,395 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-09 10:50:35,413 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-09 10:50:35,595 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:35,596 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:35,597 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:35,597 INFO L85 PathProgramCache]: Analyzing trace with hash 820044476, now seen corresponding path program 1 times [2024-11-09 10:50:35,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:35,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763570302] [2024-11-09 10:50:35,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:35,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:35,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:35,775 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:35,775 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:35,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763570302] [2024-11-09 10:50:35,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763570302] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:35,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2068329277] [2024-11-09 10:50:35,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:35,776 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:35,776 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:35,778 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) [2024-11-09 10:50:35,780 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-09 10:50:35,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:35,868 INFO L255 TraceCheckSpWp]: Trace formula consists of 112 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-11-09 10:50:35,870 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:35,889 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-09 10:50:36,004 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:36,004 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:36,138 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:36,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2068329277] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:36,139 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:36,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-09 10:50:36,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1820888711] [2024-11-09 10:50:36,140 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:36,140 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-09 10:50:36,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:36,141 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-09 10:50:36,141 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-09 10:50:36,208 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-09 10:50:36,209 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 62 transitions, 192 flow. Second operand has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:36,209 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:36,209 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-09 10:50:36,210 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:37,619 INFO L124 PetriNetUnfolderBase]: 9653/13488 cut-off events. [2024-11-09 10:50:37,620 INFO L125 PetriNetUnfolderBase]: For 28/28 co-relation queries the response was YES. [2024-11-09 10:50:37,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25655 conditions, 13488 events. 9653/13488 cut-off events. For 28/28 co-relation queries the response was YES. Maximal size of possible extension queue 1096. Compared 88257 event pairs, 6408 based on Foata normal form. 0/7910 useless extension candidates. Maximal degree in co-relation 25622. Up to 11896 conditions per place. [2024-11-09 10:50:37,730 INFO L140 encePairwiseOnDemand]: 58/66 looper letters, 32 selfloop transitions, 12 changer transitions 0/61 dead transitions. [2024-11-09 10:50:37,730 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 61 transitions, 276 flow [2024-11-09 10:50:37,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-09 10:50:37,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-09 10:50:37,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 213 transitions. [2024-11-09 10:50:37,732 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.461038961038961 [2024-11-09 10:50:37,733 INFO L175 Difference]: Start difference. First operand has 69 places, 62 transitions, 192 flow. Second operand 7 states and 213 transitions. [2024-11-09 10:50:37,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 61 transitions, 276 flow [2024-11-09 10:50:37,734 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 61 transitions, 242 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-09 10:50:37,738 INFO L231 Difference]: Finished difference. Result has 66 places, 61 transitions, 178 flow [2024-11-09 10:50:37,738 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=154, PETRI_DIFFERENCE_MINUEND_PLACES=60, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=178, PETRI_PLACES=66, PETRI_TRANSITIONS=61} [2024-11-09 10:50:37,741 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2024-11-09 10:50:37,741 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 61 transitions, 178 flow [2024-11-09 10:50:37,741 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 25.307692307692307) internal successors, (329), 13 states have internal predecessors, (329), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:37,741 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:37,741 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:37,759 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-09 10:50:37,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:37,942 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:37,943 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:37,943 INFO L85 PathProgramCache]: Analyzing trace with hash -2134544703, now seen corresponding path program 1 times [2024-11-09 10:50:37,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:37,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [190808683] [2024-11-09 10:50:37,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:37,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:37,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:38,039 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:38,040 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:38,040 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [190808683] [2024-11-09 10:50:38,040 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [190808683] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:38,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:38,041 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:50:38,041 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199062831] [2024-11-09 10:50:38,041 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:38,041 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:50:38,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:38,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:50:38,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:50:38,051 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-09 10:50:38,052 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 61 transitions, 178 flow. Second operand has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:38,052 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:38,052 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-09 10:50:38,052 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:39,187 INFO L124 PetriNetUnfolderBase]: 10696/14779 cut-off events. [2024-11-09 10:50:39,188 INFO L125 PetriNetUnfolderBase]: For 14/14 co-relation queries the response was YES. [2024-11-09 10:50:39,216 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28409 conditions, 14779 events. 10696/14779 cut-off events. For 14/14 co-relation queries the response was YES. Maximal size of possible extension queue 1147. Compared 96591 event pairs, 7188 based on Foata normal form. 298/9032 useless extension candidates. Maximal degree in co-relation 25256. Up to 11905 conditions per place. [2024-11-09 10:50:39,286 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 69 selfloop transitions, 5 changer transitions 0/91 dead transitions. [2024-11-09 10:50:39,287 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 91 transitions, 420 flow [2024-11-09 10:50:39,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:50:39,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:50:39,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 207 transitions. [2024-11-09 10:50:39,289 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6272727272727273 [2024-11-09 10:50:39,289 INFO L175 Difference]: Start difference. First operand has 66 places, 61 transitions, 178 flow. Second operand 5 states and 207 transitions. [2024-11-09 10:50:39,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 91 transitions, 420 flow [2024-11-09 10:50:39,290 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 91 transitions, 381 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-11-09 10:50:39,291 INFO L231 Difference]: Finished difference. Result has 67 places, 63 transitions, 192 flow [2024-11-09 10:50:39,292 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=153, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=192, PETRI_PLACES=67, PETRI_TRANSITIONS=63} [2024-11-09 10:50:39,293 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -1 predicate places. [2024-11-09 10:50:39,294 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 63 transitions, 192 flow [2024-11-09 10:50:39,294 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.25) internal successors, (109), 4 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:39,295 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:39,295 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:39,295 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-09 10:50:39,295 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:39,296 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:39,296 INFO L85 PathProgramCache]: Analyzing trace with hash -296438428, now seen corresponding path program 1 times [2024-11-09 10:50:39,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:39,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585015547] [2024-11-09 10:50:39,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:39,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:39,317 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:39,422 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:39,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:39,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585015547] [2024-11-09 10:50:39,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585015547] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:39,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:39,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-09 10:50:39,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1255569198] [2024-11-09 10:50:39,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:39,424 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:50:39,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:39,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:50:39,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:50:39,434 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-09 10:50:39,434 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 63 transitions, 192 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:39,434 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:39,434 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-09 10:50:39,435 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:40,188 INFO L124 PetriNetUnfolderBase]: 7339/10713 cut-off events. [2024-11-09 10:50:40,188 INFO L125 PetriNetUnfolderBase]: For 1020/1020 co-relation queries the response was YES. [2024-11-09 10:50:40,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22212 conditions, 10713 events. 7339/10713 cut-off events. For 1020/1020 co-relation queries the response was YES. Maximal size of possible extension queue 804. Compared 73007 event pairs, 5000 based on Foata normal form. 0/6785 useless extension candidates. Maximal degree in co-relation 19084. Up to 9261 conditions per place. [2024-11-09 10:50:40,260 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 38 selfloop transitions, 6 changer transitions 0/61 dead transitions. [2024-11-09 10:50:40,260 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 61 transitions, 272 flow [2024-11-09 10:50:40,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:50:40,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:50:40,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 158 transitions. [2024-11-09 10:50:40,262 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.47878787878787876 [2024-11-09 10:50:40,262 INFO L175 Difference]: Start difference. First operand has 67 places, 63 transitions, 192 flow. Second operand 5 states and 158 transitions. [2024-11-09 10:50:40,262 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 61 transitions, 272 flow [2024-11-09 10:50:40,264 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 67 places, 61 transitions, 267 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:50:40,265 INFO L231 Difference]: Finished difference. Result has 67 places, 61 transitions, 191 flow [2024-11-09 10:50:40,266 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=179, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=61, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=191, PETRI_PLACES=67, PETRI_TRANSITIONS=61} [2024-11-09 10:50:40,266 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -1 predicate places. [2024-11-09 10:50:40,266 INFO L471 AbstractCegarLoop]: Abstraction has has 67 places, 61 transitions, 191 flow [2024-11-09 10:50:40,267 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:40,267 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:40,267 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:40,267 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-09 10:50:40,267 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:40,267 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:40,268 INFO L85 PathProgramCache]: Analyzing trace with hash -296438427, now seen corresponding path program 1 times [2024-11-09 10:50:40,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:40,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2034206369] [2024-11-09 10:50:40,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:40,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:40,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:40,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:40,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:40,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2034206369] [2024-11-09 10:50:40,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2034206369] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:40,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [283215670] [2024-11-09 10:50:40,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:40,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:40,463 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:40,467 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) [2024-11-09 10:50:40,470 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-09 10:50:40,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:40,560 INFO L255 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-09 10:50:40,563 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:40,573 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-09 10:50:40,628 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-09 10:50:40,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-09 10:50:40,646 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-09 10:50:40,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-09 10:50:40,671 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:40,672 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-09 10:50:40,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [283215670] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:40,672 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-09 10:50:40,672 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2024-11-09 10:50:40,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1789704276] [2024-11-09 10:50:40,674 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:40,675 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:50:40,675 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:40,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:50:40,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-11-09 10:50:40,693 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-09 10:50:40,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 67 places, 61 transitions, 191 flow. Second operand has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:40,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:40,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-09 10:50:40,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:41,201 INFO L124 PetriNetUnfolderBase]: 4701/7063 cut-off events. [2024-11-09 10:50:41,202 INFO L125 PetriNetUnfolderBase]: For 804/804 co-relation queries the response was YES. [2024-11-09 10:50:41,215 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14076 conditions, 7063 events. 4701/7063 cut-off events. For 804/804 co-relation queries the response was YES. Maximal size of possible extension queue 549. Compared 47471 event pairs, 3256 based on Foata normal form. 0/4989 useless extension candidates. Maximal degree in co-relation 10914. Up to 6049 conditions per place. [2024-11-09 10:50:41,248 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 39 selfloop transitions, 3 changer transitions 0/59 dead transitions. [2024-11-09 10:50:41,248 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 68 places, 59 transitions, 267 flow [2024-11-09 10:50:41,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:50:41,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:50:41,249 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 132 transitions. [2024-11-09 10:50:41,249 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-11-09 10:50:41,249 INFO L175 Difference]: Start difference. First operand has 67 places, 61 transitions, 191 flow. Second operand 4 states and 132 transitions. [2024-11-09 10:50:41,250 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 68 places, 59 transitions, 267 flow [2024-11-09 10:50:41,251 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 59 transitions, 258 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-09 10:50:41,251 INFO L231 Difference]: Finished difference. Result has 65 places, 59 transitions, 180 flow [2024-11-09 10:50:41,252 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=174, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=59, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=56, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=65, PETRI_TRANSITIONS=59} [2024-11-09 10:50:41,253 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -3 predicate places. [2024-11-09 10:50:41,253 INFO L471 AbstractCegarLoop]: Abstraction has has 65 places, 59 transitions, 180 flow [2024-11-09 10:50:41,253 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 25.4) internal successors, (127), 5 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:41,253 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:41,253 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:41,270 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-09 10:50:41,454 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 [2024-11-09 10:50:41,454 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:41,455 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:41,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1161509022, now seen corresponding path program 1 times [2024-11-09 10:50:41,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:41,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741174181] [2024-11-09 10:50:41,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:41,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:41,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:41,516 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:41,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:41,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741174181] [2024-11-09 10:50:41,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [741174181] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:41,517 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:41,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:50:41,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [956253784] [2024-11-09 10:50:41,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:41,518 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:50:41,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:41,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:50:41,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:50:41,525 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-09 10:50:41,526 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 65 places, 59 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:41,526 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:41,526 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-09 10:50:41,526 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:41,853 INFO L124 PetriNetUnfolderBase]: 3151/5000 cut-off events. [2024-11-09 10:50:41,853 INFO L125 PetriNetUnfolderBase]: For 565/565 co-relation queries the response was YES. [2024-11-09 10:50:41,863 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9801 conditions, 5000 events. 3151/5000 cut-off events. For 565/565 co-relation queries the response was YES. Maximal size of possible extension queue 359. Compared 33845 event pairs, 2196 based on Foata normal form. 0/3932 useless extension candidates. Maximal degree in co-relation 7627. Up to 4084 conditions per place. [2024-11-09 10:50:41,878 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 36 selfloop transitions, 4 changer transitions 0/57 dead transitions. [2024-11-09 10:50:41,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 66 places, 57 transitions, 256 flow [2024-11-09 10:50:41,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:50:41,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:50:41,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 130 transitions. [2024-11-09 10:50:41,880 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.49242424242424243 [2024-11-09 10:50:41,880 INFO L175 Difference]: Start difference. First operand has 65 places, 59 transitions, 180 flow. Second operand 4 states and 130 transitions. [2024-11-09 10:50:41,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 66 places, 57 transitions, 256 flow [2024-11-09 10:50:41,881 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 64 places, 57 transitions, 252 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:50:41,882 INFO L231 Difference]: Finished difference. Result has 64 places, 57 transitions, 180 flow [2024-11-09 10:50:41,882 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=172, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=53, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=180, PETRI_PLACES=64, PETRI_TRANSITIONS=57} [2024-11-09 10:50:41,883 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -4 predicate places. [2024-11-09 10:50:41,883 INFO L471 AbstractCegarLoop]: Abstraction has has 64 places, 57 transitions, 180 flow [2024-11-09 10:50:41,883 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 25.75) internal successors, (103), 4 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:41,883 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:41,883 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:41,883 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-09 10:50:41,884 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:41,884 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:41,884 INFO L85 PathProgramCache]: Analyzing trace with hash 1161509023, now seen corresponding path program 1 times [2024-11-09 10:50:41,884 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:41,884 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2066710076] [2024-11-09 10:50:41,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:41,885 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:41,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:41,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:41,958 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:41,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2066710076] [2024-11-09 10:50:41,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2066710076] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:41,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:41,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:50:41,959 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [275426330] [2024-11-09 10:50:41,959 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:41,959 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-09 10:50:41,959 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:41,960 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-09 10:50:41,960 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-09 10:50:41,974 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-09 10:50:41,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 57 transitions, 180 flow. Second operand has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:41,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:41,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-09 10:50:41,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:42,366 INFO L124 PetriNetUnfolderBase]: 3669/5895 cut-off events. [2024-11-09 10:50:42,366 INFO L125 PetriNetUnfolderBase]: For 683/683 co-relation queries the response was YES. [2024-11-09 10:50:42,377 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11668 conditions, 5895 events. 3669/5895 cut-off events. For 683/683 co-relation queries the response was YES. Maximal size of possible extension queue 405. Compared 41164 event pairs, 2627 based on Foata normal form. 128/4903 useless extension candidates. Maximal degree in co-relation 9111. Up to 4094 conditions per place. [2024-11-09 10:50:42,393 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 54 selfloop transitions, 6 changer transitions 0/77 dead transitions. [2024-11-09 10:50:42,393 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 77 transitions, 352 flow [2024-11-09 10:50:42,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:50:42,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:50:42,394 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 163 transitions. [2024-11-09 10:50:42,394 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6174242424242424 [2024-11-09 10:50:42,394 INFO L175 Difference]: Start difference. First operand has 64 places, 57 transitions, 180 flow. Second operand 4 states and 163 transitions. [2024-11-09 10:50:42,394 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 77 transitions, 352 flow [2024-11-09 10:50:42,396 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 77 transitions, 347 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:50:42,397 INFO L231 Difference]: Finished difference. Result has 66 places, 57 transitions, 197 flow [2024-11-09 10:50:42,397 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=175, PETRI_DIFFERENCE_MINUEND_PLACES=62, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=57, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=51, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=197, PETRI_PLACES=66, PETRI_TRANSITIONS=57} [2024-11-09 10:50:42,397 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2024-11-09 10:50:42,398 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 57 transitions, 197 flow [2024-11-09 10:50:42,398 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 27.75) internal successors, (111), 4 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:42,398 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:42,398 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:42,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-09 10:50:42,398 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:42,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:42,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1396119792, now seen corresponding path program 1 times [2024-11-09 10:50:42,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:42,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924498507] [2024-11-09 10:50:42,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:42,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:42,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:42,617 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:42,617 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:42,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924498507] [2024-11-09 10:50:42,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924498507] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:42,618 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:42,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:50:42,618 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [466502133] [2024-11-09 10:50:42,618 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:42,618 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:50:42,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:42,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:50:42,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:50:42,645 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-09 10:50:42,645 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 57 transitions, 197 flow. Second operand has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:42,646 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:42,646 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-09 10:50:42,646 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:42,942 INFO L124 PetriNetUnfolderBase]: 2429/4116 cut-off events. [2024-11-09 10:50:42,942 INFO L125 PetriNetUnfolderBase]: For 957/957 co-relation queries the response was YES. [2024-11-09 10:50:42,948 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8569 conditions, 4116 events. 2429/4116 cut-off events. For 957/957 co-relation queries the response was YES. Maximal size of possible extension queue 292. Compared 28790 event pairs, 1773 based on Foata normal form. 0/3544 useless extension candidates. Maximal degree in co-relation 6637. Up to 3292 conditions per place. [2024-11-09 10:50:42,955 INFO L140 encePairwiseOnDemand]: 62/66 looper letters, 33 selfloop transitions, 5 changer transitions 0/55 dead transitions. [2024-11-09 10:50:42,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 55 transitions, 265 flow [2024-11-09 10:50:42,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:50:42,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:50:42,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 136 transitions. [2024-11-09 10:50:42,956 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5151515151515151 [2024-11-09 10:50:42,956 INFO L175 Difference]: Start difference. First operand has 66 places, 57 transitions, 197 flow. Second operand 4 states and 136 transitions. [2024-11-09 10:50:42,957 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 55 transitions, 265 flow [2024-11-09 10:50:42,957 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 66 places, 55 transitions, 261 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-09 10:50:42,958 INFO L231 Difference]: Finished difference. Result has 66 places, 55 transitions, 195 flow [2024-11-09 10:50:42,958 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=185, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=195, PETRI_PLACES=66, PETRI_TRANSITIONS=55} [2024-11-09 10:50:42,959 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, -2 predicate places. [2024-11-09 10:50:42,959 INFO L471 AbstractCegarLoop]: Abstraction has has 66 places, 55 transitions, 195 flow [2024-11-09 10:50:42,959 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 27.8) internal successors, (139), 5 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:42,959 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:42,959 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:42,959 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-11-09 10:50:42,960 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:42,960 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:42,960 INFO L85 PathProgramCache]: Analyzing trace with hash 270405486, now seen corresponding path program 1 times [2024-11-09 10:50:42,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:42,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050215708] [2024-11-09 10:50:42,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:42,960 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:42,978 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:43,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:43,135 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:43,135 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050215708] [2024-11-09 10:50:43,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2050215708] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:43,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:43,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:50:43,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083340136] [2024-11-09 10:50:43,136 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:43,136 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:50:43,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:43,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:50:43,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:50:43,151 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-09 10:50:43,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 66 places, 55 transitions, 195 flow. Second operand has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:43,151 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:43,151 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-09 10:50:43,151 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:43,515 INFO L124 PetriNetUnfolderBase]: 3348/5287 cut-off events. [2024-11-09 10:50:43,516 INFO L125 PetriNetUnfolderBase]: For 1202/1202 co-relation queries the response was YES. [2024-11-09 10:50:43,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11508 conditions, 5287 events. 3348/5287 cut-off events. For 1202/1202 co-relation queries the response was YES. Maximal size of possible extension queue 352. Compared 35098 event pairs, 322 based on Foata normal form. 252/5391 useless extension candidates. Maximal degree in co-relation 9860. Up to 2532 conditions per place. [2024-11-09 10:50:43,541 INFO L140 encePairwiseOnDemand]: 61/66 looper letters, 62 selfloop transitions, 5 changer transitions 3/85 dead transitions. [2024-11-09 10:50:43,541 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 70 places, 85 transitions, 415 flow [2024-11-09 10:50:43,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-09 10:50:43,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-09 10:50:43,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 183 transitions. [2024-11-09 10:50:43,542 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5545454545454546 [2024-11-09 10:50:43,542 INFO L175 Difference]: Start difference. First operand has 66 places, 55 transitions, 195 flow. Second operand 5 states and 183 transitions. [2024-11-09 10:50:43,542 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 70 places, 85 transitions, 415 flow [2024-11-09 10:50:43,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 85 transitions, 408 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:50:43,545 INFO L231 Difference]: Finished difference. Result has 69 places, 53 transitions, 177 flow [2024-11-09 10:50:43,545 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=55, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=50, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=177, PETRI_PLACES=69, PETRI_TRANSITIONS=53} [2024-11-09 10:50:43,545 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 1 predicate places. [2024-11-09 10:50:43,546 INFO L471 AbstractCegarLoop]: Abstraction has has 69 places, 53 transitions, 177 flow [2024-11-09 10:50:43,546 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.2) internal successors, (141), 5 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:43,546 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:43,546 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:43,546 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-09 10:50:43,546 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:43,547 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:43,547 INFO L85 PathProgramCache]: Analyzing trace with hash -608167966, now seen corresponding path program 1 times [2024-11-09 10:50:43,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:43,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542591018] [2024-11-09 10:50:43,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:43,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:43,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:43,752 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:50:43,752 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:43,752 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542591018] [2024-11-09 10:50:43,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1542591018] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:50:43,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:50:43,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-09 10:50:43,755 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1694509789] [2024-11-09 10:50:43,755 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:43,755 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:50:43,755 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:43,756 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:50:43,756 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-11-09 10:50:43,775 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-09 10:50:43,775 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 53 transitions, 177 flow. Second operand has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:43,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:43,776 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-09 10:50:43,776 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:44,378 INFO L124 PetriNetUnfolderBase]: 4867/7104 cut-off events. [2024-11-09 10:50:44,378 INFO L125 PetriNetUnfolderBase]: For 2540/2814 co-relation queries the response was YES. [2024-11-09 10:50:44,393 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16867 conditions, 7104 events. 4867/7104 cut-off events. For 2540/2814 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 43695 event pairs, 473 based on Foata normal form. 515/7527 useless extension candidates. Maximal degree in co-relation 16839. Up to 4100 conditions per place. [2024-11-09 10:50:44,412 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 72 selfloop transitions, 8 changer transitions 0/95 dead transitions. [2024-11-09 10:50:44,412 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 72 places, 95 transitions, 463 flow [2024-11-09 10:50:44,413 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:50:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:50:44,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 219 transitions. [2024-11-09 10:50:44,414 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.553030303030303 [2024-11-09 10:50:44,414 INFO L175 Difference]: Start difference. First operand has 69 places, 53 transitions, 177 flow. Second operand 6 states and 219 transitions. [2024-11-09 10:50:44,414 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 72 places, 95 transitions, 463 flow [2024-11-09 10:50:44,416 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 95 transitions, 448 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-11-09 10:50:44,417 INFO L231 Difference]: Finished difference. Result has 71 places, 58 transitions, 221 flow [2024-11-09 10:50:44,417 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=165, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=53, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=221, PETRI_PLACES=71, PETRI_TRANSITIONS=58} [2024-11-09 10:50:44,418 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 3 predicate places. [2024-11-09 10:50:44,418 INFO L471 AbstractCegarLoop]: Abstraction has has 71 places, 58 transitions, 221 flow [2024-11-09 10:50:44,418 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 29.0) internal successors, (145), 5 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:44,418 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:44,418 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:44,419 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-09 10:50:44,419 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:44,419 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:44,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1652199652, now seen corresponding path program 2 times [2024-11-09 10:50:44,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:44,420 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146504284] [2024-11-09 10:50:44,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:44,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:44,440 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:44,593 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:44,594 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:44,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146504284] [2024-11-09 10:50:44,594 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146504284] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:44,594 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139964683] [2024-11-09 10:50:44,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:50:44,595 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:44,595 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:44,597 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) [2024-11-09 10:50:44,599 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-09 10:50:44,705 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:50:44,705 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:50:44,707 INFO L255 TraceCheckSpWp]: Trace formula consists of 276 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-09 10:50:44,709 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:44,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:44,813 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:44,870 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:50:44,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [139964683] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:44,871 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-09 10:50:44,871 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6, 5] total 10 [2024-11-09 10:50:44,871 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195330580] [2024-11-09 10:50:44,871 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:50:44,871 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-09 10:50:44,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:44,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-09 10:50:44,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=64, Unknown=0, NotChecked=0, Total=90 [2024-11-09 10:50:44,880 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 23 out of 66 [2024-11-09 10:50:44,880 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 71 places, 58 transitions, 221 flow. Second operand has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:44,880 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:44,880 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 23 of 66 [2024-11-09 10:50:44,880 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:45,867 INFO L124 PetriNetUnfolderBase]: 10308/14602 cut-off events. [2024-11-09 10:50:45,867 INFO L125 PetriNetUnfolderBase]: For 9210/9572 co-relation queries the response was YES. [2024-11-09 10:50:45,902 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38994 conditions, 14602 events. 10308/14602 cut-off events. For 9210/9572 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 93078 event pairs, 953 based on Foata normal form. 559/14856 useless extension candidates. Maximal degree in co-relation 38964. Up to 5305 conditions per place. [2024-11-09 10:50:45,947 INFO L140 encePairwiseOnDemand]: 59/66 looper letters, 90 selfloop transitions, 12 changer transitions 0/116 dead transitions. [2024-11-09 10:50:45,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 76 places, 116 transitions, 631 flow [2024-11-09 10:50:45,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-09 10:50:45,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-09 10:50:45,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 224 transitions. [2024-11-09 10:50:45,948 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5656565656565656 [2024-11-09 10:50:45,948 INFO L175 Difference]: Start difference. First operand has 71 places, 58 transitions, 221 flow. Second operand 6 states and 224 transitions. [2024-11-09 10:50:45,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 76 places, 116 transitions, 631 flow [2024-11-09 10:50:45,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 116 transitions, 624 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-09 10:50:45,957 INFO L231 Difference]: Finished difference. Result has 78 places, 67 transitions, 319 flow [2024-11-09 10:50:45,957 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=215, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=58, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=319, PETRI_PLACES=78, PETRI_TRANSITIONS=67} [2024-11-09 10:50:45,957 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 10 predicate places. [2024-11-09 10:50:45,957 INFO L471 AbstractCegarLoop]: Abstraction has has 78 places, 67 transitions, 319 flow [2024-11-09 10:50:45,958 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 28.0) internal successors, (140), 5 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:45,958 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:45,958 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:45,975 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-09 10:50:46,158 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,5 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:46,158 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:46,159 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:46,159 INFO L85 PathProgramCache]: Analyzing trace with hash -1402417194, now seen corresponding path program 1 times [2024-11-09 10:50:46,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:46,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167076179] [2024-11-09 10:50:46,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:46,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:46,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:46,807 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:46,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:46,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167076179] [2024-11-09 10:50:46,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167076179] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:46,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895746758] [2024-11-09 10:50:46,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:46,808 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:46,808 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:46,810 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) [2024-11-09 10:50:46,811 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-09 10:50:46,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:46,916 INFO L255 TraceCheckSpWp]: Trace formula consists of 294 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-11-09 10:50:46,919 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:46,949 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 1 [2024-11-09 10:50:47,143 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 5 treesize of output 3 [2024-11-09 10:50:47,148 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 10 treesize of output 8 [2024-11-09 10:50:47,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-09 10:50:47,325 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:47,326 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:47,475 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 6 treesize of output 4 [2024-11-09 10:50:47,480 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 10 treesize of output 8 [2024-11-09 10:50:47,913 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 39 treesize of output 35 [2024-11-09 10:50:47,919 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 47 treesize of output 35 [2024-11-09 10:50:47,978 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:47,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1895746758] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:47,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:47,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 17 [2024-11-09 10:50:47,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780905873] [2024-11-09 10:50:47,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:47,979 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-09 10:50:47,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:47,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-09 10:50:47,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2024-11-09 10:50:48,172 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-09 10:50:48,173 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 78 places, 67 transitions, 319 flow. Second operand has 18 states, 18 states have (on average 29.72222222222222) internal successors, (535), 18 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:48,173 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:48,173 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-09 10:50:48,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:51,380 INFO L124 PetriNetUnfolderBase]: 17601/27692 cut-off events. [2024-11-09 10:50:51,381 INFO L125 PetriNetUnfolderBase]: For 47796/50043 co-relation queries the response was YES. [2024-11-09 10:50:51,475 INFO L83 FinitePrefix]: Finished finitePrefix Result has 84069 conditions, 27692 events. 17601/27692 cut-off events. For 47796/50043 co-relation queries the response was YES. Maximal size of possible extension queue 1735. Compared 221298 event pairs, 900 based on Foata normal form. 1367/28395 useless extension candidates. Maximal degree in co-relation 43509. Up to 11086 conditions per place. [2024-11-09 10:50:51,569 INFO L140 encePairwiseOnDemand]: 55/66 looper letters, 195 selfloop transitions, 50 changer transitions 33/302 dead transitions. [2024-11-09 10:50:51,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 302 transitions, 1890 flow [2024-11-09 10:50:51,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2024-11-09 10:50:51,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 21 states. [2024-11-09 10:50:51,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 794 transitions. [2024-11-09 10:50:51,571 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5728715728715729 [2024-11-09 10:50:51,571 INFO L175 Difference]: Start difference. First operand has 78 places, 67 transitions, 319 flow. Second operand 21 states and 794 transitions. [2024-11-09 10:50:51,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 302 transitions, 1890 flow [2024-11-09 10:50:51,608 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 97 places, 302 transitions, 1867 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-09 10:50:51,611 INFO L231 Difference]: Finished difference. Result has 105 places, 116 transitions, 891 flow [2024-11-09 10:50:51,611 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=315, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=67, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=48, PETRI_DIFFERENCE_SUBTRAHEND_STATES=21, PETRI_FLOW=891, PETRI_PLACES=105, PETRI_TRANSITIONS=116} [2024-11-09 10:50:51,612 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 37 predicate places. [2024-11-09 10:50:51,612 INFO L471 AbstractCegarLoop]: Abstraction has has 105 places, 116 transitions, 891 flow [2024-11-09 10:50:51,612 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 29.72222222222222) internal successors, (535), 18 states have internal predecessors, (535), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:51,612 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:51,612 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:51,626 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-09 10:50:51,813 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,SelfDestructingSolverStorable14 [2024-11-09 10:50:51,813 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:51,814 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:51,814 INFO L85 PathProgramCache]: Analyzing trace with hash -1788972680, now seen corresponding path program 1 times [2024-11-09 10:50:51,814 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:51,814 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856500888] [2024-11-09 10:50:51,814 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:51,814 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:51,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:53,051 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:50:53,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:53,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856500888] [2024-11-09 10:50:53,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856500888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:53,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [659167077] [2024-11-09 10:50:53,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:53,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:53,052 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:53,053 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) [2024-11-09 10:50:53,055 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-09 10:50:53,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:53,170 INFO L255 TraceCheckSpWp]: Trace formula consists of 320 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-09 10:50:53,173 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:50:53,302 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 5 treesize of output 3 [2024-11-09 10:50:53,305 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 10 treesize of output 8 [2024-11-09 10:50:53,341 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 23 treesize of output 7 [2024-11-09 10:50:53,350 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-09 10:50:53,350 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:50:53,397 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:50:53,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 26 treesize of output 18 [2024-11-09 10:50:53,495 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-09 10:50:53,495 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [659167077] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:50:53,495 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:50:53,495 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6, 5] total 16 [2024-11-09 10:50:53,495 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022370651] [2024-11-09 10:50:53,496 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:50:53,496 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-09 10:50:53,497 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:50:53,497 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-09 10:50:53,497 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2024-11-09 10:50:53,707 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 24 out of 66 [2024-11-09 10:50:53,707 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 105 places, 116 transitions, 891 flow. Second operand has 17 states, 17 states have (on average 28.0) internal successors, (476), 17 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:53,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:50:53,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 24 of 66 [2024-11-09 10:50:53,708 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:50:58,311 INFO L124 PetriNetUnfolderBase]: 21499/33582 cut-off events. [2024-11-09 10:50:58,312 INFO L125 PetriNetUnfolderBase]: For 102222/105166 co-relation queries the response was YES. [2024-11-09 10:50:58,480 INFO L83 FinitePrefix]: Finished finitePrefix Result has 110975 conditions, 33582 events. 21499/33582 cut-off events. For 102222/105166 co-relation queries the response was YES. Maximal size of possible extension queue 1972. Compared 270288 event pairs, 1183 based on Foata normal form. 1920/34948 useless extension candidates. Maximal degree in co-relation 86833. Up to 12164 conditions per place. [2024-11-09 10:50:58,606 INFO L140 encePairwiseOnDemand]: 57/66 looper letters, 150 selfloop transitions, 60 changer transitions 1/235 dead transitions. [2024-11-09 10:50:58,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 117 places, 235 transitions, 1918 flow [2024-11-09 10:50:58,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-09 10:50:58,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-09 10:50:58,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 504 transitions. [2024-11-09 10:50:58,607 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.509090909090909 [2024-11-09 10:50:58,608 INFO L175 Difference]: Start difference. First operand has 105 places, 116 transitions, 891 flow. Second operand 15 states and 504 transitions. [2024-11-09 10:50:58,608 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 117 places, 235 transitions, 1918 flow [2024-11-09 10:50:59,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 235 transitions, 1832 flow, removed 42 selfloop flow, removed 1 redundant places. [2024-11-09 10:50:59,583 INFO L231 Difference]: Finished difference. Result has 120 places, 140 transitions, 1258 flow [2024-11-09 10:50:59,584 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=809, PETRI_DIFFERENCE_MINUEND_PLACES=102, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=114, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=1258, PETRI_PLACES=120, PETRI_TRANSITIONS=140} [2024-11-09 10:50:59,584 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 52 predicate places. [2024-11-09 10:50:59,585 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 140 transitions, 1258 flow [2024-11-09 10:50:59,585 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 28.0) internal successors, (476), 17 states have internal predecessors, (476), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:50:59,585 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:50:59,585 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:50:59,604 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-09 10:50:59,789 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-09 10:50:59,790 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:50:59,790 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:50:59,790 INFO L85 PathProgramCache]: Analyzing trace with hash -899420501, now seen corresponding path program 2 times [2024-11-09 10:50:59,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:50:59,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [678844642] [2024-11-09 10:50:59,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:50:59,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:50:59,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:50:59,904 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:50:59,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:50:59,904 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [678844642] [2024-11-09 10:50:59,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [678844642] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:50:59,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1679006416] [2024-11-09 10:50:59,905 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-09 10:50:59,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:50:59,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:50:59,907 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:50:59,908 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-09 10:51:00,020 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-09 10:51:00,021 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:51:00,023 INFO L255 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-09 10:51:00,025 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:00,071 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:00,071 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:00,188 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 3 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:00,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1679006416] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:00,189 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:00,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 8 [2024-11-09 10:51:00,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654555235] [2024-11-09 10:51:00,189 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:00,190 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-09 10:51:00,190 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:00,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-09 10:51:00,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-11-09 10:51:00,206 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-09 10:51:00,207 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 140 transitions, 1258 flow. Second operand has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:00,207 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:00,207 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-09 10:51:00,207 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:06,358 INFO L124 PetriNetUnfolderBase]: 30164/47767 cut-off events. [2024-11-09 10:51:06,358 INFO L125 PetriNetUnfolderBase]: For 170402/173895 co-relation queries the response was YES. [2024-11-09 10:51:06,634 INFO L83 FinitePrefix]: Finished finitePrefix Result has 157835 conditions, 47767 events. 30164/47767 cut-off events. For 170402/173895 co-relation queries the response was YES. Maximal size of possible extension queue 2372. Compared 405746 event pairs, 3743 based on Foata normal form. 2615/49074 useless extension candidates. Maximal degree in co-relation 134179. Up to 20823 conditions per place. [2024-11-09 10:51:06,813 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 123 selfloop transitions, 45 changer transitions 0/192 dead transitions. [2024-11-09 10:51:06,813 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 123 places, 192 transitions, 1854 flow [2024-11-09 10:51:06,814 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-09 10:51:06,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-09 10:51:06,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 178 transitions. [2024-11-09 10:51:06,814 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6742424242424242 [2024-11-09 10:51:06,815 INFO L175 Difference]: Start difference. First operand has 120 places, 140 transitions, 1258 flow. Second operand 4 states and 178 transitions. [2024-11-09 10:51:06,815 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 123 places, 192 transitions, 1854 flow [2024-11-09 10:51:07,768 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 116 places, 192 transitions, 1773 flow, removed 21 selfloop flow, removed 7 redundant places. [2024-11-09 10:51:07,770 INFO L231 Difference]: Finished difference. Result has 118 places, 145 transitions, 1426 flow [2024-11-09 10:51:07,770 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1111, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=134, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1426, PETRI_PLACES=118, PETRI_TRANSITIONS=145} [2024-11-09 10:51:07,771 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 50 predicate places. [2024-11-09 10:51:07,771 INFO L471 AbstractCegarLoop]: Abstraction has has 118 places, 145 transitions, 1426 flow [2024-11-09 10:51:07,771 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 33.0) internal successors, (264), 8 states have internal predecessors, (264), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:07,771 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:07,771 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:07,787 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-09 10:51:07,975 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,8 /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:07,976 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:51:07,976 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:07,976 INFO L85 PathProgramCache]: Analyzing trace with hash -1948024051, now seen corresponding path program 1 times [2024-11-09 10:51:07,976 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:07,976 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245359862] [2024-11-09 10:51:07,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:07,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:07,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:08,072 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-09 10:51:08,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:08,073 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245359862] [2024-11-09 10:51:08,073 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245359862] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-09 10:51:08,073 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-09 10:51:08,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-09 10:51:08,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076144293] [2024-11-09 10:51:08,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-09 10:51:08,074 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-09 10:51:08,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:08,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-09 10:51:08,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-09 10:51:08,078 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-09 10:51:08,079 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 118 places, 145 transitions, 1426 flow. Second operand has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:08,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:08,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-09 10:51:08,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-09 10:51:15,098 INFO L124 PetriNetUnfolderBase]: 33194/54445 cut-off events. [2024-11-09 10:51:15,098 INFO L125 PetriNetUnfolderBase]: For 257164/262666 co-relation queries the response was YES. [2024-11-09 10:51:15,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 186171 conditions, 54445 events. 33194/54445 cut-off events. For 257164/262666 co-relation queries the response was YES. Maximal size of possible extension queue 2620. Compared 492682 event pairs, 11096 based on Foata normal form. 4000/56973 useless extension candidates. Maximal degree in co-relation 149820. Up to 26040 conditions per place. [2024-11-09 10:51:15,619 INFO L140 encePairwiseOnDemand]: 63/66 looper letters, 168 selfloop transitions, 8 changer transitions 0/200 dead transitions. [2024-11-09 10:51:15,619 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 200 transitions, 2368 flow [2024-11-09 10:51:15,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-09 10:51:15,620 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-09 10:51:15,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 127 transitions. [2024-11-09 10:51:15,620 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6414141414141414 [2024-11-09 10:51:15,620 INFO L175 Difference]: Start difference. First operand has 118 places, 145 transitions, 1426 flow. Second operand 3 states and 127 transitions. [2024-11-09 10:51:15,621 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 200 transitions, 2368 flow [2024-11-09 10:51:16,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 119 places, 200 transitions, 2343 flow, removed 6 selfloop flow, removed 1 redundant places. [2024-11-09 10:51:16,825 INFO L231 Difference]: Finished difference. Result has 120 places, 146 transitions, 1463 flow [2024-11-09 10:51:16,826 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=66, PETRI_DIFFERENCE_MINUEND_FLOW=1409, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=145, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=1463, PETRI_PLACES=120, PETRI_TRANSITIONS=146} [2024-11-09 10:51:16,826 INFO L277 CegarLoopForPetriNet]: 68 programPoint places, 52 predicate places. [2024-11-09 10:51:16,826 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 146 transitions, 1463 flow [2024-11-09 10:51:16,827 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 35.333333333333336) internal successors, (106), 3 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:16,827 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-11-09 10:51:16,827 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-09 10:51:16,827 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-09 10:51:16,827 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-11-09 10:51:16,828 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-09 10:51:16,828 INFO L85 PathProgramCache]: Analyzing trace with hash 1602456348, now seen corresponding path program 3 times [2024-11-09 10:51:16,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-09 10:51:16,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158047521] [2024-11-09 10:51:16,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-09 10:51:16,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-09 10:51:16,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-09 10:51:18,363 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-09 10:51:18,363 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-09 10:51:18,363 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158047521] [2024-11-09 10:51:18,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1158047521] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-09 10:51:18,364 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714540118] [2024-11-09 10:51:18,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-09 10:51:18,364 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-09 10:51:18,364 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-11-09 10:51:18,366 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-09 10:51:18,367 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-09 10:51:18,510 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-09 10:51:18,511 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-09 10:51:18,513 INFO L255 TraceCheckSpWp]: Trace formula consists of 335 conjuncts, 24 conjuncts are in the unsatisfiable core [2024-11-09 10:51:18,518 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-09 10:51:18,909 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 5 treesize of output 3 [2024-11-09 10:51:18,913 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 10 treesize of output 8 [2024-11-09 10:51:19,133 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:51:19,133 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 55 treesize of output 12 [2024-11-09 10:51:19,144 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-09 10:51:19,144 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-09 10:51:19,760 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-09 10:51:19,760 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 2 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 4 case distinctions, treesize of input 49 treesize of output 51 [2024-11-09 10:51:19,890 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 3 proven. 8 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-09 10:51:19,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [714540118] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-09 10:51:19,890 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-09 10:51:19,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8, 7] total 22 [2024-11-09 10:51:19,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [991386743] [2024-11-09 10:51:19,891 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-09 10:51:19,891 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2024-11-09 10:51:19,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-09 10:51:19,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2024-11-09 10:51:19,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=426, Unknown=0, NotChecked=0, Total=506 [2024-11-09 10:51:20,202 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 26 out of 66 [2024-11-09 10:51:20,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 146 transitions, 1463 flow. Second operand has 23 states, 23 states have (on average 29.565217391304348) internal successors, (680), 23 states have internal predecessors, (680), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-09 10:51:20,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-09 10:51:20,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 26 of 66 [2024-11-09 10:51:20,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand