./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/unroll-4.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 4fc63b2a Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/unroll-4.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU --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 bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-10-31 22:14:40,648 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-10-31 22:14:40,741 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-10-31 22:14:40,747 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-10-31 22:14:40,748 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-10-31 22:14:40,778 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-10-31 22:14:40,778 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-10-31 22:14:40,779 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-10-31 22:14:40,780 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-10-31 22:14:40,780 INFO L153 SettingsManager]: * Use memory slicer=true [2024-10-31 22:14:40,781 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-10-31 22:14:40,781 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-10-31 22:14:40,782 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-10-31 22:14:40,782 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-10-31 22:14:40,783 INFO L153 SettingsManager]: * Use SBE=true [2024-10-31 22:14:40,784 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-10-31 22:14:40,784 INFO L153 SettingsManager]: * sizeof long=4 [2024-10-31 22:14:40,784 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-10-31 22:14:40,785 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-10-31 22:14:40,785 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-10-31 22:14:40,786 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-10-31 22:14:40,787 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-10-31 22:14:40,787 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-10-31 22:14:40,788 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-10-31 22:14:40,788 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-10-31 22:14:40,789 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-10-31 22:14:40,789 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-10-31 22:14:40,789 INFO L153 SettingsManager]: * sizeof long double=12 [2024-10-31 22:14:40,794 INFO L153 SettingsManager]: * Use constant arrays=true [2024-10-31 22:14:40,794 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-10-31 22:14:40,795 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-10-31 22:14:40,795 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-10-31 22:14:40,796 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-10-31 22:14:40,796 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:14:40,796 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-10-31 22:14:40,797 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-10-31 22:14:40,797 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-10-31 22:14:40,798 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-10-31 22:14:40,800 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-10-31 22:14:40,801 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-10-31 22:14:40,801 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-10-31 22:14:40,801 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-10-31 22:14:40,802 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:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> bb07434636f33664cc09ed992a41516efeea5f96121c916fb8904844e76d9fcd [2024-10-31 22:14:41,151 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-10-31 22:14:41,192 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-10-31 22:14:41,195 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-10-31 22:14:41,197 INFO L270 PluginConnector]: Initializing CDTParser... [2024-10-31 22:14:41,197 INFO L274 PluginConnector]: CDTParser initialized [2024-10-31 22:14:41,198 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/../../sv-benchmarks/c/weaver/unroll-4.wvr.c Unable to find full path for "g++" [2024-10-31 22:14:43,393 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-10-31 22:14:43,606 INFO L384 CDTParser]: Found 1 translation units. [2024-10-31 22:14:43,606 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/sv-benchmarks/c/weaver/unroll-4.wvr.c [2024-10-31 22:14:43,615 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/data/05e9b205b/b5585ac12122483c96e4160fcd86f713/FLAG62b4e338a [2024-10-31 22:14:43,993 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/data/05e9b205b/b5585ac12122483c96e4160fcd86f713 [2024-10-31 22:14:43,996 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-10-31 22:14:43,998 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-10-31 22:14:43,999 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-10-31 22:14:43,999 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-10-31 22:14:44,006 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-10-31 22:14:44,007 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:14:43" (1/1) ... [2024-10-31 22:14:44,008 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@412946cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:44, skipping insertion in model container [2024-10-31 22:14:44,008 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 31.10 10:14:43" (1/1) ... [2024-10-31 22:14:44,034 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-10-31 22:14:44,292 WARN L1053 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-10-31 22:14:44,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:14:44,306 INFO L200 MainTranslator]: Completed pre-run [2024-10-31 22:14:44,351 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-10-31 22:14:44,373 INFO L204 MainTranslator]: Completed translation [2024-10-31 22:14:44,374 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:44 WrapperNode [2024-10-31 22:14:44,374 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-10-31 22:14:44,375 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-10-31 22:14:44,375 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-10-31 22:14:44,375 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-10-31 22:14:44,382 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:44" (1/1) ... [2024-10-31 22:14:44,391 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:44" (1/1) ... [2024-10-31 22:14:44,422 INFO L138 Inliner]: procedures = 23, calls = 27, calls flagged for inlining = 14, calls inlined = 14, statements flattened = 149 [2024-10-31 22:14:44,423 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-10-31 22:14:44,424 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-10-31 22:14:44,424 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-10-31 22:14:44,424 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-10-31 22:14:44,439 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:44" (1/1) ... [2024-10-31 22:14:44,439 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:44" (1/1) ... [2024-10-31 22:14:44,443 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:44" (1/1) ... [2024-10-31 22:14:44,461 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 1 writes are split as follows [0, 1]. [2024-10-31 22:14:44,461 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:44" (1/1) ... [2024-10-31 22:14:44,461 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:44" (1/1) ... [2024-10-31 22:14:44,469 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:44" (1/1) ... [2024-10-31 22:14:44,473 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:44" (1/1) ... [2024-10-31 22:14:44,479 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:44" (1/1) ... [2024-10-31 22:14:44,480 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:44" (1/1) ... [2024-10-31 22:14:44,486 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-10-31 22:14:44,490 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-10-31 22:14:44,495 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-10-31 22:14:44,495 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-10-31 22:14:44,496 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:44" (1/1) ... [2024-10-31 22:14:44,513 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-10-31 22:14:44,525 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:44,538 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-10-31 22:14:44,540 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-10-31 22:14:44,570 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-10-31 22:14:44,571 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-10-31 22:14:44,571 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-10-31 22:14:44,571 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-10-31 22:14:44,571 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-10-31 22:14:44,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-10-31 22:14:44,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-10-31 22:14:44,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-10-31 22:14:44,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-10-31 22:14:44,572 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-10-31 22:14:44,572 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-10-31 22:14:44,573 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-10-31 22:14:44,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-10-31 22:14:44,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-10-31 22:14:44,575 WARN L207 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-10-31 22:14:44,698 INFO L238 CfgBuilder]: Building ICFG [2024-10-31 22:14:44,701 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-10-31 22:14:45,138 INFO L283 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-10-31 22:14:45,140 INFO L287 CfgBuilder]: Performing block encoding [2024-10-31 22:14:45,514 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-10-31 22:14:45,514 INFO L316 CfgBuilder]: Removed 3 assume(true) statements. [2024-10-31 22:14:45,515 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:14:45 BoogieIcfgContainer [2024-10-31 22:14:45,515 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-10-31 22:14:45,517 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-10-31 22:14:45,517 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-10-31 22:14:45,521 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-10-31 22:14:45,521 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 31.10 10:14:43" (1/3) ... [2024-10-31 22:14:45,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31aa12ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:14:45, skipping insertion in model container [2024-10-31 22:14:45,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 31.10 10:14:44" (2/3) ... [2024-10-31 22:14:45,522 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@31aa12ea and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 31.10 10:14:45, skipping insertion in model container [2024-10-31 22:14:45,522 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 31.10 10:14:45" (3/3) ... [2024-10-31 22:14:45,525 INFO L112 eAbstractionObserver]: Analyzing ICFG unroll-4.wvr.c [2024-10-31 22:14:45,546 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-10-31 22:14:45,546 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 14 error locations. [2024-10-31 22:14:45,547 INFO L489 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-10-31 22:14:45,609 INFO L143 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2024-10-31 22:14:45,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 44 places, 40 transitions, 94 flow [2024-10-31 22:14:45,685 INFO L124 PetriNetUnfolderBase]: 3/38 cut-off events. [2024-10-31 22:14:45,685 INFO L125 PetriNetUnfolderBase]: For 2/2 co-relation queries the response was YES. [2024-10-31 22:14:45,691 INFO L83 FinitePrefix]: Finished finitePrefix Result has 47 conditions, 38 events. 3/38 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 61 event pairs, 0 based on Foata normal form. 0/21 useless extension candidates. Maximal degree in co-relation 26. Up to 2 conditions per place. [2024-10-31 22:14:45,691 INFO L82 GeneralOperation]: Start removeDead. Operand has 44 places, 40 transitions, 94 flow [2024-10-31 22:14:45,695 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 41 places, 37 transitions, 86 flow [2024-10-31 22:14:45,709 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-10-31 22:14:45,716 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;@1ed21246, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-10-31 22:14:45,717 INFO L334 AbstractCegarLoop]: Starting to check reachability of 26 error locations. [2024-10-31 22:14:45,720 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-10-31 22:14:45,721 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-10-31 22:14:45,721 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-10-31 22:14:45,721 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:45,722 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:14:45,723 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:14:45,728 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:45,728 INFO L85 PathProgramCache]: Analyzing trace with hash 514405, now seen corresponding path program 1 times [2024-10-31 22:14:45,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:45,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080260019] [2024-10-31 22:14:45,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:45,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:45,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:46,026 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:46,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:46,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080260019] [2024-10-31 22:14:46,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080260019] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:46,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:46,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-10-31 22:14:46,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729439030] [2024-10-31 22:14:46,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:46,040 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:14:46,045 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:46,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:14:46,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:46,099 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-10-31 22:14:46,101 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 41 places, 37 transitions, 86 flow. Second operand has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:46,102 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:46,102 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-10-31 22:14:46,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:46,247 INFO L124 PetriNetUnfolderBase]: 101/253 cut-off events. [2024-10-31 22:14:46,247 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-10-31 22:14:46,249 INFO L83 FinitePrefix]: Finished finitePrefix Result has 452 conditions, 253 events. 101/253 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1136 event pairs, 75 based on Foata normal form. 1/191 useless extension candidates. Maximal degree in co-relation 390. Up to 175 conditions per place. [2024-10-31 22:14:46,253 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 20 selfloop transitions, 2 changer transitions 0/34 dead transitions. [2024-10-31 22:14:46,253 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 34 transitions, 124 flow [2024-10-31 22:14:46,257 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:14:46,294 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:14:46,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 69 transitions. [2024-10-31 22:14:46,304 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.575 [2024-10-31 22:14:46,306 INFO L175 Difference]: Start difference. First operand has 41 places, 37 transitions, 86 flow. Second operand 3 states and 69 transitions. [2024-10-31 22:14:46,307 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 34 transitions, 124 flow [2024-10-31 22:14:46,309 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 34 transitions, 116 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:14:46,311 INFO L231 Difference]: Finished difference. Result has 36 places, 34 transitions, 76 flow [2024-10-31 22:14:46,314 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=32, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=76, PETRI_PLACES=36, PETRI_TRANSITIONS=34} [2024-10-31 22:14:46,319 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -5 predicate places. [2024-10-31 22:14:46,320 INFO L471 AbstractCegarLoop]: Abstraction has has 36 places, 34 transitions, 76 flow [2024-10-31 22:14:46,321 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 16.0) internal successors, (48), 3 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:46,321 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:46,321 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-10-31 22:14:46,321 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-10-31 22:14:46,322 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:14:46,322 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:46,322 INFO L85 PathProgramCache]: Analyzing trace with hash 514406, now seen corresponding path program 1 times [2024-10-31 22:14:46,323 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:46,323 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1021032959] [2024-10-31 22:14:46,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:46,323 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:46,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:46,703 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:46,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:46,704 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1021032959] [2024-10-31 22:14:46,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1021032959] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:46,704 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:46,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:14:46,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [129908220] [2024-10-31 22:14:46,704 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:46,705 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:14:46,707 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:46,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:14:46,708 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:46,758 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-10-31 22:14:46,759 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 36 places, 34 transitions, 76 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:46,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:46,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-10-31 22:14:46,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:46,921 INFO L124 PetriNetUnfolderBase]: 102/256 cut-off events. [2024-10-31 22:14:46,922 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-31 22:14:46,925 INFO L83 FinitePrefix]: Finished finitePrefix Result has 448 conditions, 256 events. 102/256 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1141 event pairs, 75 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 426. Up to 180 conditions per place. [2024-10-31 22:14:46,928 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 23 selfloop transitions, 3 changer transitions 0/37 dead transitions. [2024-10-31 22:14:46,929 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 37 transitions, 136 flow [2024-10-31 22:14:46,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:14:46,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:14:46,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-10-31 22:14:46,933 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-10-31 22:14:46,934 INFO L175 Difference]: Start difference. First operand has 36 places, 34 transitions, 76 flow. Second operand 3 states and 72 transitions. [2024-10-31 22:14:46,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 37 transitions, 136 flow [2024-10-31 22:14:46,936 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 37 transitions, 130 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:14:46,938 INFO L231 Difference]: Finished difference. Result has 37 places, 36 transitions, 91 flow [2024-10-31 22:14:46,939 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=72, PETRI_DIFFERENCE_MINUEND_PLACES=34, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=34, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=91, PETRI_PLACES=37, PETRI_TRANSITIONS=36} [2024-10-31 22:14:46,940 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2024-10-31 22:14:46,941 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 36 transitions, 91 flow [2024-10-31 22:14:46,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:46,942 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:46,942 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-10-31 22:14:46,942 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-10-31 22:14:46,942 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:14:46,944 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:46,944 INFO L85 PathProgramCache]: Analyzing trace with hash 494359813, now seen corresponding path program 1 times [2024-10-31 22:14:46,945 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:46,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160420225] [2024-10-31 22:14:46,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:46,946 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:46,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:47,405 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:47,406 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:47,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160420225] [2024-10-31 22:14:47,406 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [160420225] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:47,406 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1479897013] [2024-10-31 22:14:47,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:47,407 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:47,407 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:47,411 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:47,416 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-10-31 22:14:47,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:47,517 INFO L255 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 22:14:47,522 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:47,623 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:14:47,825 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:47,826 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:48,012 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:48,012 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1479897013] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:48,013 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:48,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 22:14:48,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1277015892] [2024-10-31 22:14:48,013 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:48,014 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:14:48,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:48,015 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:14:48,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:14:48,260 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-10-31 22:14:48,260 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 36 transitions, 91 flow. Second operand has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:48,261 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:48,261 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-10-31 22:14:48,261 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:48,603 INFO L124 PetriNetUnfolderBase]: 102/255 cut-off events. [2024-10-31 22:14:48,603 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-31 22:14:48,605 INFO L83 FinitePrefix]: Finished finitePrefix Result has 451 conditions, 255 events. 102/255 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1142 event pairs, 75 based on Foata normal form. 0/193 useless extension candidates. Maximal degree in co-relation 426. Up to 176 conditions per place. [2024-10-31 22:14:48,606 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 19 selfloop transitions, 6 changer transitions 0/36 dead transitions. [2024-10-31 22:14:48,608 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 36 transitions, 139 flow [2024-10-31 22:14:48,609 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:14:48,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:14:48,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 101 transitions. [2024-10-31 22:14:48,610 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.505 [2024-10-31 22:14:48,610 INFO L175 Difference]: Start difference. First operand has 37 places, 36 transitions, 91 flow. Second operand 5 states and 101 transitions. [2024-10-31 22:14:48,611 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 36 transitions, 139 flow [2024-10-31 22:14:48,611 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 36 transitions, 136 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:14:48,613 INFO L231 Difference]: Finished difference. Result has 40 places, 36 transitions, 104 flow [2024-10-31 22:14:48,613 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=84, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=29, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=104, PETRI_PLACES=40, PETRI_TRANSITIONS=36} [2024-10-31 22:14:48,614 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -1 predicate places. [2024-10-31 22:14:48,614 INFO L471 AbstractCegarLoop]: Abstraction has has 40 places, 36 transitions, 104 flow [2024-10-31 22:14:48,616 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 16.363636363636363) internal successors, (180), 11 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:48,616 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:48,617 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-10-31 22:14:48,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-10-31 22:14:48,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:48,821 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:14:48,821 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:48,822 INFO L85 PathProgramCache]: Analyzing trace with hash -1852120623, now seen corresponding path program 1 times [2024-10-31 22:14:48,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:48,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845562584] [2024-10-31 22:14:48,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:48,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:48,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:48,901 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:48,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:48,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845562584] [2024-10-31 22:14:48,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1845562584] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:48,903 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:48,903 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:14:48,903 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835562548] [2024-10-31 22:14:48,903 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:48,904 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:14:48,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:48,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:14:48,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:48,912 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-10-31 22:14:48,912 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 40 places, 36 transitions, 104 flow. Second operand has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:48,913 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:48,913 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-10-31 22:14:48,913 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:49,006 INFO L124 PetriNetUnfolderBase]: 101/254 cut-off events. [2024-10-31 22:14:49,006 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-31 22:14:49,007 INFO L83 FinitePrefix]: Finished finitePrefix Result has 455 conditions, 254 events. 101/254 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 27. Compared 1136 event pairs, 75 based on Foata normal form. 1/193 useless extension candidates. Maximal degree in co-relation 426. Up to 177 conditions per place. [2024-10-31 22:14:49,009 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 20 selfloop transitions, 4 changer transitions 0/35 dead transitions. [2024-10-31 22:14:49,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 42 places, 35 transitions, 146 flow [2024-10-31 22:14:49,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:14:49,010 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:14:49,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 72 transitions. [2024-10-31 22:14:49,011 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6 [2024-10-31 22:14:49,011 INFO L175 Difference]: Start difference. First operand has 40 places, 36 transitions, 104 flow. Second operand 3 states and 72 transitions. [2024-10-31 22:14:49,011 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 42 places, 35 transitions, 146 flow [2024-10-31 22:14:49,012 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 39 places, 35 transitions, 136 flow, removed 2 selfloop flow, removed 3 redundant places. [2024-10-31 22:14:49,013 INFO L231 Difference]: Finished difference. Result has 39 places, 35 transitions, 96 flow [2024-10-31 22:14:49,013 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=88, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=96, PETRI_PLACES=39, PETRI_TRANSITIONS=35} [2024-10-31 22:14:49,014 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2024-10-31 22:14:49,014 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 35 transitions, 96 flow [2024-10-31 22:14:49,015 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 17.666666666666668) internal successors, (53), 3 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:49,015 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:49,015 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:49,015 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-10-31 22:14:49,015 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:14:49,016 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:49,016 INFO L85 PathProgramCache]: Analyzing trace with hash 33410513, now seen corresponding path program 1 times [2024-10-31 22:14:49,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:49,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [248808094] [2024-10-31 22:14:49,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:49,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:49,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:49,081 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:49,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:49,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [248808094] [2024-10-31 22:14:49,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [248808094] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:49,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:49,082 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-10-31 22:14:49,082 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [988372073] [2024-10-31 22:14:49,082 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:49,082 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-10-31 22:14:49,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:49,083 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-10-31 22:14:49,083 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-10-31 22:14:49,120 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 10 out of 40 [2024-10-31 22:14:49,120 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 35 transitions, 96 flow. Second operand has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:49,120 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:49,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 10 of 40 [2024-10-31 22:14:49,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:49,204 INFO L124 PetriNetUnfolderBase]: 101/217 cut-off events. [2024-10-31 22:14:49,205 INFO L125 PetriNetUnfolderBase]: For 7/7 co-relation queries the response was YES. [2024-10-31 22:14:49,205 INFO L83 FinitePrefix]: Finished finitePrefix Result has 416 conditions, 217 events. 101/217 cut-off events. For 7/7 co-relation queries the response was YES. Maximal size of possible extension queue 19. Compared 769 event pairs, 75 based on Foata normal form. 0/192 useless extension candidates. Maximal degree in co-relation 392. Up to 174 conditions per place. [2024-10-31 22:14:49,207 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 22 selfloop transitions, 2 changer transitions 0/30 dead transitions. [2024-10-31 22:14:49,207 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 37 places, 30 transitions, 134 flow [2024-10-31 22:14:49,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:14:49,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:14:49,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 67 transitions. [2024-10-31 22:14:49,209 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.41875 [2024-10-31 22:14:49,209 INFO L175 Difference]: Start difference. First operand has 39 places, 35 transitions, 96 flow. Second operand 4 states and 67 transitions. [2024-10-31 22:14:49,209 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 37 places, 30 transitions, 134 flow [2024-10-31 22:14:49,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 35 places, 30 transitions, 126 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:14:49,211 INFO L231 Difference]: Finished difference. Result has 35 places, 30 transitions, 82 flow [2024-10-31 22:14:49,211 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=78, PETRI_DIFFERENCE_MINUEND_PLACES=32, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=82, PETRI_PLACES=35, PETRI_TRANSITIONS=30} [2024-10-31 22:14:49,211 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -6 predicate places. [2024-10-31 22:14:49,212 INFO L471 AbstractCegarLoop]: Abstraction has has 35 places, 30 transitions, 82 flow [2024-10-31 22:14:49,212 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 12.0) internal successors, (48), 4 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:49,212 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:49,213 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:49,213 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-10-31 22:14:49,213 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:14:49,213 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:49,214 INFO L85 PathProgramCache]: Analyzing trace with hash 33410514, now seen corresponding path program 1 times [2024-10-31 22:14:49,214 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:49,214 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612684604] [2024-10-31 22:14:49,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:49,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:49,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:49,444 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:49,444 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:49,444 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612684604] [2024-10-31 22:14:49,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [612684604] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:49,445 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859273294] [2024-10-31 22:14:49,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:49,445 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:49,445 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:49,447 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:49,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-10-31 22:14:49,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:49,522 INFO L255 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:14:49,523 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:49,632 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:49,632 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:49,705 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 29 treesize of output 25 [2024-10-31 22:14:49,734 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:49,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [859273294] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:49,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:49,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 22:14:49,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [179277136] [2024-10-31 22:14:49,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:49,736 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:14:49,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:49,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:14:49,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:14:49,940 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-10-31 22:14:49,941 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 35 places, 30 transitions, 82 flow. Second operand has 11 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:49,941 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:49,941 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-10-31 22:14:49,941 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:50,138 INFO L124 PetriNetUnfolderBase]: 200/387 cut-off events. [2024-10-31 22:14:50,138 INFO L125 PetriNetUnfolderBase]: For 6/6 co-relation queries the response was YES. [2024-10-31 22:14:50,139 INFO L83 FinitePrefix]: Finished finitePrefix Result has 760 conditions, 387 events. 200/387 cut-off events. For 6/6 co-relation queries the response was YES. Maximal size of possible extension queue 32. Compared 1611 event pairs, 75 based on Foata normal form. 0/321 useless extension candidates. Maximal degree in co-relation 735. Up to 189 conditions per place. [2024-10-31 22:14:50,141 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 38 selfloop transitions, 3 changer transitions 0/46 dead transitions. [2024-10-31 22:14:50,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 38 places, 46 transitions, 199 flow [2024-10-31 22:14:50,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:14:50,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:14:50,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-10-31 22:14:50,142 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.625 [2024-10-31 22:14:50,143 INFO L175 Difference]: Start difference. First operand has 35 places, 30 transitions, 82 flow. Second operand 4 states and 100 transitions. [2024-10-31 22:14:50,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 38 places, 46 transitions, 199 flow [2024-10-31 22:14:50,144 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 36 places, 46 transitions, 196 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:14:50,145 INFO L231 Difference]: Finished difference. Result has 37 places, 31 transitions, 93 flow [2024-10-31 22:14:50,145 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=79, PETRI_DIFFERENCE_MINUEND_PLACES=33, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=30, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=27, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=93, PETRI_PLACES=37, PETRI_TRANSITIONS=31} [2024-10-31 22:14:50,146 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -4 predicate places. [2024-10-31 22:14:50,146 INFO L471 AbstractCegarLoop]: Abstraction has has 37 places, 31 transitions, 93 flow [2024-10-31 22:14:50,146 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 17.181818181818183) internal successors, (189), 11 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:50,146 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:50,147 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:50,168 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-10-31 22:14:50,352 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-10-31 22:14:50,352 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting thread2Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:14:50,353 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:50,353 INFO L85 PathProgramCache]: Analyzing trace with hash 2042512446, now seen corresponding path program 1 times [2024-10-31 22:14:50,353 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:50,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1356036348] [2024-10-31 22:14:50,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:50,354 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:50,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:50,565 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:50,565 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:50,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1356036348] [2024-10-31 22:14:50,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1356036348] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:50,566 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [385301002] [2024-10-31 22:14:50,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:50,566 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:50,567 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:50,569 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:50,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-10-31 22:14:50,645 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:50,647 INFO L255 TraceCheckSpWp]: Trace formula consists of 111 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-10-31 22:14:50,648 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:50,794 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:50,794 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:50,894 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 29 treesize of output 25 [2024-10-31 22:14:50,932 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:50,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [385301002] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:50,933 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:50,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-10-31 22:14:50,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069273376] [2024-10-31 22:14:50,934 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:50,934 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-10-31 22:14:50,934 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:50,935 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-10-31 22:14:50,935 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2024-10-31 22:14:51,110 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-10-31 22:14:51,111 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 37 places, 31 transitions, 93 flow. Second operand has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:51,111 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:51,111 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-10-31 22:14:51,111 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:51,404 INFO L124 PetriNetUnfolderBase]: 338/599 cut-off events. [2024-10-31 22:14:51,404 INFO L125 PetriNetUnfolderBase]: For 77/97 co-relation queries the response was YES. [2024-10-31 22:14:51,405 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1307 conditions, 599 events. 338/599 cut-off events. For 77/97 co-relation queries the response was YES. Maximal size of possible extension queue 33. Compared 2309 event pairs, 81 based on Foata normal form. 0/443 useless extension candidates. Maximal degree in co-relation 1280. Up to 411 conditions per place. [2024-10-31 22:14:51,409 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 38 selfloop transitions, 3 changer transitions 0/43 dead transitions. [2024-10-31 22:14:51,409 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 40 places, 43 transitions, 206 flow [2024-10-31 22:14:51,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-10-31 22:14:51,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-10-31 22:14:51,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 86 transitions. [2024-10-31 22:14:51,410 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5375 [2024-10-31 22:14:51,411 INFO L175 Difference]: Start difference. First operand has 37 places, 31 transitions, 93 flow. Second operand 4 states and 86 transitions. [2024-10-31 22:14:51,411 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 40 places, 43 transitions, 206 flow [2024-10-31 22:14:51,412 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 38 places, 43 transitions, 201 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:14:51,413 INFO L231 Difference]: Finished difference. Result has 39 places, 32 transitions, 103 flow [2024-10-31 22:14:51,413 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=89, PETRI_DIFFERENCE_MINUEND_PLACES=35, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=31, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=103, PETRI_PLACES=39, PETRI_TRANSITIONS=32} [2024-10-31 22:14:51,414 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, -2 predicate places. [2024-10-31 22:14:51,414 INFO L471 AbstractCegarLoop]: Abstraction has has 39 places, 32 transitions, 103 flow [2024-10-31 22:14:51,414 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 14.727272727272727) internal successors, (162), 11 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:51,415 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:51,415 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:51,436 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-10-31 22:14:51,619 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-10-31 22:14:51,619 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:14:51,620 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:51,620 INFO L85 PathProgramCache]: Analyzing trace with hash 2042749590, now seen corresponding path program 1 times [2024-10-31 22:14:51,620 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:51,620 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1754655201] [2024-10-31 22:14:51,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:51,621 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:51,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:51,854 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:51,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:51,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1754655201] [2024-10-31 22:14:51,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1754655201] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:51,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1211117873] [2024-10-31 22:14:51,858 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:51,858 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:51,858 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:51,860 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:51,862 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-10-31 22:14:51,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:51,935 INFO L255 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 22:14:51,936 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:52,126 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:52,127 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:52,222 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 36 treesize of output 32 [2024-10-31 22:14:52,457 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:52,458 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1211117873] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:52,458 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:52,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2024-10-31 22:14:52,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63478163] [2024-10-31 22:14:52,459 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:52,459 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-10-31 22:14:52,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:52,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-10-31 22:14:52,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2024-10-31 22:14:53,077 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-10-31 22:14:53,078 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 39 places, 32 transitions, 103 flow. Second operand has 17 states, 17 states have (on average 16.764705882352942) internal successors, (285), 17 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:53,078 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:53,078 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-10-31 22:14:53,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:53,609 INFO L124 PetriNetUnfolderBase]: 523/1055 cut-off events. [2024-10-31 22:14:53,609 INFO L125 PetriNetUnfolderBase]: For 114/114 co-relation queries the response was YES. [2024-10-31 22:14:53,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2259 conditions, 1055 events. 523/1055 cut-off events. For 114/114 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 5595 event pairs, 297 based on Foata normal form. 0/877 useless extension candidates. Maximal degree in co-relation 1181. Up to 485 conditions per place. [2024-10-31 22:14:53,616 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 69 selfloop transitions, 11 changer transitions 0/85 dead transitions. [2024-10-31 22:14:53,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 46 places, 85 transitions, 412 flow [2024-10-31 22:14:53,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-10-31 22:14:53,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-10-31 22:14:53,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-10-31 22:14:53,619 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6125 [2024-10-31 22:14:53,619 INFO L175 Difference]: Start difference. First operand has 39 places, 32 transitions, 103 flow. Second operand 8 states and 196 transitions. [2024-10-31 22:14:53,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 46 places, 85 transitions, 412 flow [2024-10-31 22:14:53,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 85 transitions, 404 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-10-31 22:14:53,622 INFO L231 Difference]: Finished difference. Result has 49 places, 40 transitions, 190 flow [2024-10-31 22:14:53,623 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=99, PETRI_DIFFERENCE_MINUEND_PLACES=37, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=190, PETRI_PLACES=49, PETRI_TRANSITIONS=40} [2024-10-31 22:14:53,624 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-10-31 22:14:53,625 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 40 transitions, 190 flow [2024-10-31 22:14:53,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 16.764705882352942) internal successors, (285), 17 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:53,626 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:53,626 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:53,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-10-31 22:14:53,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2024-10-31 22:14:53,827 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:14:53,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:53,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1106623079, now seen corresponding path program 1 times [2024-10-31 22:14:53,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:53,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278172893] [2024-10-31 22:14:53,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:53,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:53,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:53,996 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:53,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278172893] [2024-10-31 22:14:53,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1278172893] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:53,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026381056] [2024-10-31 22:14:53,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:53,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:53,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:53,999 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:54,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-10-31 22:14:54,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:54,078 INFO L255 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 12 conjuncts are in the unsatisfiable core [2024-10-31 22:14:54,080 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:54,210 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:54,210 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:54,248 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 29 treesize of output 25 [2024-10-31 22:14:54,480 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:14:54,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2026381056] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:54,480 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:54,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2024-10-31 22:14:54,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250084428] [2024-10-31 22:14:54,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:54,481 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-10-31 22:14:54,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:54,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-10-31 22:14:54,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2024-10-31 22:14:54,698 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-10-31 22:14:54,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 40 transitions, 190 flow. Second operand has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:54,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:54,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-10-31 22:14:54,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:55,134 INFO L124 PetriNetUnfolderBase]: 744/1306 cut-off events. [2024-10-31 22:14:55,134 INFO L125 PetriNetUnfolderBase]: For 811/851 co-relation queries the response was YES. [2024-10-31 22:14:55,137 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3306 conditions, 1306 events. 744/1306 cut-off events. For 811/851 co-relation queries the response was YES. Maximal size of possible extension queue 62. Compared 6092 event pairs, 348 based on Foata normal form. 0/1114 useless extension candidates. Maximal degree in co-relation 1975. Up to 997 conditions per place. [2024-10-31 22:14:55,143 INFO L140 encePairwiseOnDemand]: 30/40 looper letters, 61 selfloop transitions, 9 changer transitions 0/72 dead transitions. [2024-10-31 22:14:55,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 55 places, 72 transitions, 425 flow [2024-10-31 22:14:55,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:14:55,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:14:55,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 150 transitions. [2024-10-31 22:14:55,145 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5357142857142857 [2024-10-31 22:14:55,145 INFO L175 Difference]: Start difference. First operand has 49 places, 40 transitions, 190 flow. Second operand 7 states and 150 transitions. [2024-10-31 22:14:55,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 55 places, 72 transitions, 425 flow [2024-10-31 22:14:55,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 54 places, 72 transitions, 423 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-10-31 22:14:55,150 INFO L231 Difference]: Finished difference. Result has 55 places, 41 transitions, 219 flow [2024-10-31 22:14:55,151 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=188, PETRI_DIFFERENCE_MINUEND_PLACES=48, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=8, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=219, PETRI_PLACES=55, PETRI_TRANSITIONS=41} [2024-10-31 22:14:55,151 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 14 predicate places. [2024-10-31 22:14:55,151 INFO L471 AbstractCegarLoop]: Abstraction has has 55 places, 41 transitions, 219 flow [2024-10-31 22:14:55,152 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 14.357142857142858) internal successors, (201), 14 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:55,152 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:55,152 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:55,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-10-31 22:14:55,356 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:55,357 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:14:55,357 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:55,357 INFO L85 PathProgramCache]: Analyzing trace with hash -421730793, now seen corresponding path program 2 times [2024-10-31 22:14:55,357 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:55,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033897245] [2024-10-31 22:14:55,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:55,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:55,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:55,613 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-10-31 22:14:55,613 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:55,613 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033897245] [2024-10-31 22:14:55,614 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033897245] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:55,614 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263419662] [2024-10-31 22:14:55,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:14:55,614 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:55,614 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:55,616 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:55,618 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-10-31 22:14:55,700 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 22:14:55,701 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:55,702 INFO L255 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 20 conjuncts are in the unsatisfiable core [2024-10-31 22:14:55,704 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:55,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-10-31 22:14:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:14:55,943 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:14:56,178 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-10-31 22:14:56,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263419662] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:14:56,179 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:14:56,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 10 [2024-10-31 22:14:56,181 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352573933] [2024-10-31 22:14:56,181 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:14:56,182 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 12 states [2024-10-31 22:14:56,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:56,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2024-10-31 22:14:56,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=104, Unknown=0, NotChecked=0, Total=132 [2024-10-31 22:14:56,674 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 15 out of 40 [2024-10-31 22:14:56,675 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 55 places, 41 transitions, 219 flow. Second operand has 12 states, 12 states have (on average 17.583333333333332) internal successors, (211), 12 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:56,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:56,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 15 of 40 [2024-10-31 22:14:56,676 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:57,042 INFO L124 PetriNetUnfolderBase]: 560/1084 cut-off events. [2024-10-31 22:14:57,043 INFO L125 PetriNetUnfolderBase]: For 478/478 co-relation queries the response was YES. [2024-10-31 22:14:57,047 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2794 conditions, 1084 events. 560/1084 cut-off events. For 478/478 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5608 event pairs, 321 based on Foata normal form. 0/1020 useless extension candidates. Maximal degree in co-relation 1728. Up to 727 conditions per place. [2024-10-31 22:14:57,053 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 38 selfloop transitions, 10 changer transitions 0/53 dead transitions. [2024-10-31 22:14:57,053 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 58 places, 53 transitions, 356 flow [2024-10-31 22:14:57,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:14:57,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:14:57,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 108 transitions. [2024-10-31 22:14:57,054 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.54 [2024-10-31 22:14:57,054 INFO L175 Difference]: Start difference. First operand has 55 places, 41 transitions, 219 flow. Second operand 5 states and 108 transitions. [2024-10-31 22:14:57,054 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 58 places, 53 transitions, 356 flow [2024-10-31 22:14:57,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 53 places, 53 transitions, 339 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-10-31 22:14:57,061 INFO L231 Difference]: Finished difference. Result has 53 places, 40 transitions, 218 flow [2024-10-31 22:14:57,061 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=198, PETRI_DIFFERENCE_MINUEND_PLACES=49, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=40, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=218, PETRI_PLACES=53, PETRI_TRANSITIONS=40} [2024-10-31 22:14:57,063 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 12 predicate places. [2024-10-31 22:14:57,064 INFO L471 AbstractCegarLoop]: Abstraction has has 53 places, 40 transitions, 218 flow [2024-10-31 22:14:57,064 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 12 states, 12 states have (on average 17.583333333333332) internal successors, (211), 12 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:57,064 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:57,064 INFO L204 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:57,088 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-10-31 22:14:57,265 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-10-31 22:14:57,265 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting thread2Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:14:57,266 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:57,266 INFO L85 PathProgramCache]: Analyzing trace with hash -196103624, now seen corresponding path program 2 times [2024-10-31 22:14:57,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:57,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [554636530] [2024-10-31 22:14:57,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:57,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:57,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-10-31 22:14:57,519 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:57,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [554636530] [2024-10-31 22:14:57,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [554636530] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:14:57,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [938082519] [2024-10-31 22:14:57,520 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:14:57,520 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:57,520 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:14:57,522 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:14:57,524 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-10-31 22:14:57,612 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-10-31 22:14:57,613 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:14:57,614 INFO L255 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 21 conjuncts are in the unsatisfiable core [2024-10-31 22:14:57,616 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:14:57,632 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 [2024-10-31 22:14:57,881 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:14:57,881 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-10-31 22:14:57,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [938082519] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:57,882 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-10-31 22:14:57,882 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [4] total 7 [2024-10-31 22:14:57,882 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294937430] [2024-10-31 22:14:57,882 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:57,883 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:14:57,883 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:57,883 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:14:57,883 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=55, Unknown=0, NotChecked=0, Total=72 [2024-10-31 22:14:58,004 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 12 out of 40 [2024-10-31 22:14:58,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 40 transitions, 218 flow. Second operand has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:58,005 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:58,005 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 12 of 40 [2024-10-31 22:14:58,005 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:58,303 INFO L124 PetriNetUnfolderBase]: 560/988 cut-off events. [2024-10-31 22:14:58,304 INFO L125 PetriNetUnfolderBase]: For 1063/1063 co-relation queries the response was YES. [2024-10-31 22:14:58,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2783 conditions, 988 events. 560/988 cut-off events. For 1063/1063 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4330 event pairs, 200 based on Foata normal form. 64/988 useless extension candidates. Maximal degree in co-relation 1670. Up to 523 conditions per place. [2024-10-31 22:14:58,311 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 40 selfloop transitions, 6 changer transitions 0/47 dead transitions. [2024-10-31 22:14:58,312 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 53 places, 47 transitions, 365 flow [2024-10-31 22:14:58,312 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:14:58,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:14:58,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 92 transitions. [2024-10-31 22:14:58,313 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.46 [2024-10-31 22:14:58,314 INFO L175 Difference]: Start difference. First operand has 53 places, 40 transitions, 218 flow. Second operand 5 states and 92 transitions. [2024-10-31 22:14:58,314 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 53 places, 47 transitions, 365 flow [2024-10-31 22:14:58,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 49 places, 47 transitions, 331 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:14:58,317 INFO L231 Difference]: Finished difference. Result has 49 places, 36 transitions, 194 flow [2024-10-31 22:14:58,318 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=194, PETRI_PLACES=49, PETRI_TRANSITIONS=36} [2024-10-31 22:14:58,318 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 8 predicate places. [2024-10-31 22:14:58,318 INFO L471 AbstractCegarLoop]: Abstraction has has 49 places, 36 transitions, 194 flow [2024-10-31 22:14:58,319 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.2) internal successors, (71), 5 states have internal predecessors, (71), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:58,319 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:58,319 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:58,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-10-31 22:14:58,519 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:14:58,520 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:14:58,521 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:58,521 INFO L85 PathProgramCache]: Analyzing trace with hash 1403755886, now seen corresponding path program 1 times [2024-10-31 22:14:58,521 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:58,521 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43111416] [2024-10-31 22:14:58,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:58,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:58,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:58,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:58,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43111416] [2024-10-31 22:14:58,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [43111416] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:58,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:58,609 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-10-31 22:14:58,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186957173] [2024-10-31 22:14:58,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:58,610 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-10-31 22:14:58,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:58,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-10-31 22:14:58,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-10-31 22:14:58,663 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-10-31 22:14:58,663 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 49 places, 36 transitions, 194 flow. Second operand has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:58,663 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:58,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-10-31 22:14:58,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:58,885 INFO L124 PetriNetUnfolderBase]: 560/984 cut-off events. [2024-10-31 22:14:58,885 INFO L125 PetriNetUnfolderBase]: For 724/724 co-relation queries the response was YES. [2024-10-31 22:14:58,888 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2689 conditions, 984 events. 560/984 cut-off events. For 724/724 co-relation queries the response was YES. Maximal size of possible extension queue 43. Compared 4234 event pairs, 159 based on Foata normal form. 2/986 useless extension candidates. Maximal degree in co-relation 1655. Up to 796 conditions per place. [2024-10-31 22:14:58,893 INFO L140 encePairwiseOnDemand]: 36/40 looper letters, 42 selfloop transitions, 5 changer transitions 1/49 dead transitions. [2024-10-31 22:14:58,893 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 51 places, 49 transitions, 331 flow [2024-10-31 22:14:58,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-10-31 22:14:58,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-10-31 22:14:58,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-10-31 22:14:58,894 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.7 [2024-10-31 22:14:58,894 INFO L175 Difference]: Start difference. First operand has 49 places, 36 transitions, 194 flow. Second operand 3 states and 84 transitions. [2024-10-31 22:14:58,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 51 places, 49 transitions, 331 flow [2024-10-31 22:14:58,897 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 47 places, 49 transitions, 317 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-10-31 22:14:58,898 INFO L231 Difference]: Finished difference. Result has 48 places, 38 transitions, 215 flow [2024-10-31 22:14:58,899 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=182, PETRI_DIFFERENCE_MINUEND_PLACES=45, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=36, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=31, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=215, PETRI_PLACES=48, PETRI_TRANSITIONS=38} [2024-10-31 22:14:58,899 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 7 predicate places. [2024-10-31 22:14:58,899 INFO L471 AbstractCegarLoop]: Abstraction has has 48 places, 38 transitions, 215 flow [2024-10-31 22:14:58,900 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 21.0) internal successors, (63), 3 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:58,900 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:58,900 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:58,900 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-10-31 22:14:58,900 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:14:58,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:58,901 INFO L85 PathProgramCache]: Analyzing trace with hash -7316084, now seen corresponding path program 1 times [2024-10-31 22:14:58,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:58,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432078748] [2024-10-31 22:14:58,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:58,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:58,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:59,029 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:59,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:59,030 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432078748] [2024-10-31 22:14:59,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [432078748] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:59,030 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:59,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:14:59,030 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107738418] [2024-10-31 22:14:59,031 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:59,031 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:14:59,031 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:59,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:14:59,032 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:14:59,032 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-10-31 22:14:59,032 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 48 places, 38 transitions, 215 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:59,032 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:59,033 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-10-31 22:14:59,033 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:59,339 INFO L124 PetriNetUnfolderBase]: 657/1180 cut-off events. [2024-10-31 22:14:59,340 INFO L125 PetriNetUnfolderBase]: For 922/922 co-relation queries the response was YES. [2024-10-31 22:14:59,342 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3245 conditions, 1180 events. 657/1180 cut-off events. For 922/922 co-relation queries the response was YES. Maximal size of possible extension queue 55. Compared 5904 event pairs, 219 based on Foata normal form. 34/1140 useless extension candidates. Maximal degree in co-relation 1949. Up to 566 conditions per place. [2024-10-31 22:14:59,347 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 66 selfloop transitions, 12 changer transitions 0/79 dead transitions. [2024-10-31 22:14:59,347 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 52 places, 79 transitions, 551 flow [2024-10-31 22:14:59,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:14:59,348 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:14:59,348 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 138 transitions. [2024-10-31 22:14:59,349 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.69 [2024-10-31 22:14:59,349 INFO L175 Difference]: Start difference. First operand has 48 places, 38 transitions, 215 flow. Second operand 5 states and 138 transitions. [2024-10-31 22:14:59,349 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 52 places, 79 transitions, 551 flow [2024-10-31 22:14:59,352 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 51 places, 79 transitions, 536 flow, removed 1 selfloop flow, removed 1 redundant places. [2024-10-31 22:14:59,353 INFO L231 Difference]: Finished difference. Result has 54 places, 45 transitions, 311 flow [2024-10-31 22:14:59,354 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=208, PETRI_DIFFERENCE_MINUEND_PLACES=47, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=38, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=5, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=311, PETRI_PLACES=54, PETRI_TRANSITIONS=45} [2024-10-31 22:14:59,354 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 13 predicate places. [2024-10-31 22:14:59,354 INFO L471 AbstractCegarLoop]: Abstraction has has 54 places, 45 transitions, 311 flow [2024-10-31 22:14:59,355 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:59,355 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:59,355 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:59,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-10-31 22:14:59,355 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:14:59,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:59,356 INFO L85 PathProgramCache]: Analyzing trace with hash -1867767996, now seen corresponding path program 2 times [2024-10-31 22:14:59,356 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:59,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1086394894] [2024-10-31 22:14:59,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:59,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:59,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:59,479 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:59,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:59,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1086394894] [2024-10-31 22:14:59,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1086394894] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:59,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:59,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:14:59,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [204122371] [2024-10-31 22:14:59,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:59,480 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:14:59,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:59,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:14:59,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:14:59,482 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-10-31 22:14:59,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 54 places, 45 transitions, 311 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:59,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:59,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-10-31 22:14:59,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:14:59,799 INFO L124 PetriNetUnfolderBase]: 629/1123 cut-off events. [2024-10-31 22:14:59,799 INFO L125 PetriNetUnfolderBase]: For 1638/1638 co-relation queries the response was YES. [2024-10-31 22:14:59,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 3715 conditions, 1123 events. 629/1123 cut-off events. For 1638/1638 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 5303 event pairs, 79 based on Foata normal form. 48/1171 useless extension candidates. Maximal degree in co-relation 2369. Up to 528 conditions per place. [2024-10-31 22:14:59,808 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 71 selfloop transitions, 16 changer transitions 1/89 dead transitions. [2024-10-31 22:14:59,808 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 60 places, 89 transitions, 672 flow [2024-10-31 22:14:59,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-10-31 22:14:59,809 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-10-31 22:14:59,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-10-31 22:14:59,809 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6392857142857142 [2024-10-31 22:14:59,809 INFO L175 Difference]: Start difference. First operand has 54 places, 45 transitions, 311 flow. Second operand 7 states and 179 transitions. [2024-10-31 22:14:59,809 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 60 places, 89 transitions, 672 flow [2024-10-31 22:14:59,817 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 58 places, 89 transitions, 652 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-10-31 22:14:59,818 INFO L231 Difference]: Finished difference. Result has 63 places, 51 transitions, 397 flow [2024-10-31 22:14:59,819 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=294, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=45, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=30, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=397, PETRI_PLACES=63, PETRI_TRANSITIONS=51} [2024-10-31 22:14:59,820 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 22 predicate places. [2024-10-31 22:14:59,820 INFO L471 AbstractCegarLoop]: Abstraction has has 63 places, 51 transitions, 397 flow [2024-10-31 22:14:59,821 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:59,821 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:14:59,821 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:14:59,821 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-10-31 22:14:59,821 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:14:59,822 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:14:59,822 INFO L85 PathProgramCache]: Analyzing trace with hash -673087170, now seen corresponding path program 3 times [2024-10-31 22:14:59,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:14:59,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373519992] [2024-10-31 22:14:59,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:14:59,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:14:59,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:14:59,941 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:14:59,941 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:14:59,941 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373519992] [2024-10-31 22:14:59,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [373519992] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:14:59,942 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:14:59,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:14:59,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648848166] [2024-10-31 22:14:59,942 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:14:59,943 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:14:59,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:14:59,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:14:59,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:14:59,943 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-10-31 22:14:59,944 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 63 places, 51 transitions, 397 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:14:59,944 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:14:59,944 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-10-31 22:14:59,944 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:00,206 INFO L124 PetriNetUnfolderBase]: 621/1127 cut-off events. [2024-10-31 22:15:00,207 INFO L125 PetriNetUnfolderBase]: For 2803/2803 co-relation queries the response was YES. [2024-10-31 22:15:00,210 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4213 conditions, 1127 events. 621/1127 cut-off events. For 2803/2803 co-relation queries the response was YES. Maximal size of possible extension queue 53. Compared 5350 event pairs, 241 based on Foata normal form. 12/1139 useless extension candidates. Maximal degree in co-relation 2773. Up to 806 conditions per place. [2024-10-31 22:15:00,216 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 64 selfloop transitions, 10 changer transitions 5/80 dead transitions. [2024-10-31 22:15:00,216 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 67 places, 80 transitions, 752 flow [2024-10-31 22:15:00,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:15:00,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:15:00,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-10-31 22:15:00,218 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-10-31 22:15:00,218 INFO L175 Difference]: Start difference. First operand has 63 places, 51 transitions, 397 flow. Second operand 5 states and 124 transitions. [2024-10-31 22:15:00,218 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 67 places, 80 transitions, 752 flow [2024-10-31 22:15:00,227 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 65 places, 80 transitions, 727 flow, removed 2 selfloop flow, removed 2 redundant places. [2024-10-31 22:15:00,228 INFO L231 Difference]: Finished difference. Result has 68 places, 52 transitions, 427 flow [2024-10-31 22:15:00,229 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=378, PETRI_DIFFERENCE_MINUEND_PLACES=61, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=51, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=427, PETRI_PLACES=68, PETRI_TRANSITIONS=52} [2024-10-31 22:15:00,229 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 27 predicate places. [2024-10-31 22:15:00,229 INFO L471 AbstractCegarLoop]: Abstraction has has 68 places, 52 transitions, 427 flow [2024-10-31 22:15:00,230 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:00,230 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:00,230 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:00,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-10-31 22:15:00,230 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:15:00,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:00,231 INFO L85 PathProgramCache]: Analyzing trace with hash -1891608486, now seen corresponding path program 4 times [2024-10-31 22:15:00,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:00,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687718415] [2024-10-31 22:15:00,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:00,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:00,357 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:00,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687718415] [2024-10-31 22:15:00,357 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687718415] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:00,357 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1446029945] [2024-10-31 22:15:00,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2024-10-31 22:15:00,357 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:00,357 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:00,360 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:00,361 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-10-31 22:15:00,443 INFO L227 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2024-10-31 22:15:00,443 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:15:00,444 INFO L255 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:15:00,446 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:00,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:00,476 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:00,578 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:00,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1446029945] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:00,578 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:00,578 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 4] total 8 [2024-10-31 22:15:00,578 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824753447] [2024-10-31 22:15:00,578 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:00,579 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-10-31 22:15:00,579 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:00,579 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-10-31 22:15:00,579 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-10-31 22:15:00,579 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-10-31 22:15:00,580 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 68 places, 52 transitions, 427 flow. Second operand has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:00,580 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:00,580 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-10-31 22:15:00,580 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:01,113 INFO L124 PetriNetUnfolderBase]: 849/1519 cut-off events. [2024-10-31 22:15:01,114 INFO L125 PetriNetUnfolderBase]: For 4723/4723 co-relation queries the response was YES. [2024-10-31 22:15:01,119 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6167 conditions, 1519 events. 849/1519 cut-off events. For 4723/4723 co-relation queries the response was YES. Maximal size of possible extension queue 84. Compared 7805 event pairs, 162 based on Foata normal form. 18/1537 useless extension candidates. Maximal degree in co-relation 3840. Up to 526 conditions per place. [2024-10-31 22:15:01,128 INFO L140 encePairwiseOnDemand]: 31/40 looper letters, 81 selfloop transitions, 61 changer transitions 3/146 dead transitions. [2024-10-31 22:15:01,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 146 transitions, 1368 flow [2024-10-31 22:15:01,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-10-31 22:15:01,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-10-31 22:15:01,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 271 transitions. [2024-10-31 22:15:01,130 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.615909090909091 [2024-10-31 22:15:01,130 INFO L175 Difference]: Start difference. First operand has 68 places, 52 transitions, 427 flow. Second operand 11 states and 271 transitions. [2024-10-31 22:15:01,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 146 transitions, 1368 flow [2024-10-31 22:15:01,147 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 74 places, 146 transitions, 1322 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-10-31 22:15:01,150 INFO L231 Difference]: Finished difference. Result has 82 places, 93 transitions, 1021 flow [2024-10-31 22:15:01,150 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=404, PETRI_DIFFERENCE_MINUEND_PLACES=64, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=23, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1021, PETRI_PLACES=82, PETRI_TRANSITIONS=93} [2024-10-31 22:15:01,150 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 41 predicate places. [2024-10-31 22:15:01,151 INFO L471 AbstractCegarLoop]: Abstraction has has 82 places, 93 transitions, 1021 flow [2024-10-31 22:15:01,151 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 19.5) internal successors, (156), 8 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:01,151 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:01,151 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:01,173 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-10-31 22:15:01,355 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-10-31 22:15:01,355 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:15:01,355 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:01,355 INFO L85 PathProgramCache]: Analyzing trace with hash 1867057308, now seen corresponding path program 5 times [2024-10-31 22:15:01,355 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:01,356 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907933233] [2024-10-31 22:15:01,356 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:01,356 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:01,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:01,521 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:01,522 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:01,522 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907933233] [2024-10-31 22:15:01,522 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907933233] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:01,522 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:01,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:15:01,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1677603721] [2024-10-31 22:15:01,526 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:01,526 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:15:01,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:01,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:15:01,527 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:15:01,527 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-10-31 22:15:01,528 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 93 transitions, 1021 flow. Second operand has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:01,528 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:01,528 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-10-31 22:15:01,528 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:01,928 INFO L124 PetriNetUnfolderBase]: 843/1509 cut-off events. [2024-10-31 22:15:01,928 INFO L125 PetriNetUnfolderBase]: For 7608/7608 co-relation queries the response was YES. [2024-10-31 22:15:01,935 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7485 conditions, 1509 events. 843/1509 cut-off events. For 7608/7608 co-relation queries the response was YES. Maximal size of possible extension queue 83. Compared 7693 event pairs, 290 based on Foata normal form. 4/1513 useless extension candidates. Maximal degree in co-relation 5915. Up to 966 conditions per place. [2024-10-31 22:15:01,953 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 89 selfloop transitions, 29 changer transitions 2/121 dead transitions. [2024-10-31 22:15:01,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 121 transitions, 1508 flow [2024-10-31 22:15:01,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:15:01,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:15:01,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 128 transitions. [2024-10-31 22:15:01,956 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.64 [2024-10-31 22:15:01,956 INFO L175 Difference]: Start difference. First operand has 82 places, 93 transitions, 1021 flow. Second operand 5 states and 128 transitions. [2024-10-31 22:15:01,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 121 transitions, 1508 flow [2024-10-31 22:15:01,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 86 places, 121 transitions, 1470 flow, removed 19 selfloop flow, removed 0 redundant places. [2024-10-31 22:15:01,987 INFO L231 Difference]: Finished difference. Result has 88 places, 99 transitions, 1162 flow [2024-10-31 22:15:01,988 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=993, PETRI_DIFFERENCE_MINUEND_PLACES=82, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=93, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=66, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1162, PETRI_PLACES=88, PETRI_TRANSITIONS=99} [2024-10-31 22:15:01,988 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 47 predicate places. [2024-10-31 22:15:01,988 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 99 transitions, 1162 flow [2024-10-31 22:15:01,988 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 19.4) internal successors, (97), 5 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:01,989 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:01,989 INFO L204 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:01,989 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-10-31 22:15:01,989 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:15:01,989 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:01,990 INFO L85 PathProgramCache]: Analyzing trace with hash 149308248, now seen corresponding path program 6 times [2024-10-31 22:15:01,990 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:01,990 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759730288] [2024-10-31 22:15:01,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:01,990 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:02,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:02,127 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:02,127 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:02,127 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759730288] [2024-10-31 22:15:02,128 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759730288] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:02,128 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:02,128 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-10-31 22:15:02,128 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965594337] [2024-10-31 22:15:02,128 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:02,129 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-10-31 22:15:02,130 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:02,130 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-10-31 22:15:02,130 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2024-10-31 22:15:02,131 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-10-31 22:15:02,131 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 99 transitions, 1162 flow. Second operand has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:02,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:02,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-10-31 22:15:02,133 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:02,499 INFO L124 PetriNetUnfolderBase]: 841/1497 cut-off events. [2024-10-31 22:15:02,500 INFO L125 PetriNetUnfolderBase]: For 8468/8468 co-relation queries the response was YES. [2024-10-31 22:15:02,505 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7574 conditions, 1497 events. 841/1497 cut-off events. For 8468/8468 co-relation queries the response was YES. Maximal size of possible extension queue 80. Compared 7535 event pairs, 282 based on Foata normal form. 14/1511 useless extension candidates. Maximal degree in co-relation 6157. Up to 966 conditions per place. [2024-10-31 22:15:02,516 INFO L140 encePairwiseOnDemand]: 33/40 looper letters, 83 selfloop transitions, 38 changer transitions 4/126 dead transitions. [2024-10-31 22:15:02,517 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 126 transitions, 1605 flow [2024-10-31 22:15:02,517 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-10-31 22:15:02,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-10-31 22:15:02,518 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-10-31 22:15:02,518 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6208333333333333 [2024-10-31 22:15:02,518 INFO L175 Difference]: Start difference. First operand has 88 places, 99 transitions, 1162 flow. Second operand 6 states and 149 transitions. [2024-10-31 22:15:02,518 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 126 transitions, 1605 flow [2024-10-31 22:15:02,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 126 transitions, 1575 flow, removed 5 selfloop flow, removed 1 redundant places. [2024-10-31 22:15:02,560 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 1245 flow [2024-10-31 22:15:02,560 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1136, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=61, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1245, PETRI_PLACES=93, PETRI_TRANSITIONS=101} [2024-10-31 22:15:02,561 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 52 predicate places. [2024-10-31 22:15:02,561 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 1245 flow [2024-10-31 22:15:02,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 18.833333333333332) internal successors, (113), 6 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:02,561 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:02,562 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] [2024-10-31 22:15:02,562 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-10-31 22:15:02,562 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:15:02,562 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:02,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1621799717, now seen corresponding path program 1 times [2024-10-31 22:15:02,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:02,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [832196680] [2024-10-31 22:15:02,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:02,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:02,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:02,682 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:02,682 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:02,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [832196680] [2024-10-31 22:15:02,682 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [832196680] provided 1 perfect and 0 imperfect interpolant sequences [2024-10-31 22:15:02,683 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-10-31 22:15:02,683 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-10-31 22:15:02,683 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847250265] [2024-10-31 22:15:02,683 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-10-31 22:15:02,683 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-10-31 22:15:02,684 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:02,684 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-10-31 22:15:02,684 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-10-31 22:15:02,685 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-10-31 22:15:02,685 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 1245 flow. Second operand has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:02,685 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:02,685 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-10-31 22:15:02,685 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:03,055 INFO L124 PetriNetUnfolderBase]: 763/1328 cut-off events. [2024-10-31 22:15:03,056 INFO L125 PetriNetUnfolderBase]: For 8718/8718 co-relation queries the response was YES. [2024-10-31 22:15:03,063 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7085 conditions, 1328 events. 763/1328 cut-off events. For 8718/8718 co-relation queries the response was YES. Maximal size of possible extension queue 70. Compared 6338 event pairs, 246 based on Foata normal form. 18/1346 useless extension candidates. Maximal degree in co-relation 6183. Up to 914 conditions per place. [2024-10-31 22:15:03,070 INFO L140 encePairwiseOnDemand]: 35/40 looper letters, 86 selfloop transitions, 23 changer transitions 8/118 dead transitions. [2024-10-31 22:15:03,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 96 places, 118 transitions, 1563 flow [2024-10-31 22:15:03,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-10-31 22:15:03,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-10-31 22:15:03,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-10-31 22:15:03,071 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.62 [2024-10-31 22:15:03,071 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 1245 flow. Second operand 5 states and 124 transitions. [2024-10-31 22:15:03,072 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 96 places, 118 transitions, 1563 flow [2024-10-31 22:15:03,104 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 90 places, 118 transitions, 1461 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-10-31 22:15:03,107 INFO L231 Difference]: Finished difference. Result has 93 places, 101 transitions, 1227 flow [2024-10-31 22:15:03,107 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1148, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=78, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1227, PETRI_PLACES=93, PETRI_TRANSITIONS=101} [2024-10-31 22:15:03,108 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 52 predicate places. [2024-10-31 22:15:03,108 INFO L471 AbstractCegarLoop]: Abstraction has has 93 places, 101 transitions, 1227 flow [2024-10-31 22:15:03,108 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 20.0) internal successors, (100), 5 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:03,108 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:03,108 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] [2024-10-31 22:15:03,109 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-10-31 22:15:03,109 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:15:03,109 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:03,109 INFO L85 PathProgramCache]: Analyzing trace with hash -1881404417, now seen corresponding path program 1 times [2024-10-31 22:15:03,109 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:03,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744663083] [2024-10-31 22:15:03,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:03,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:03,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:03,479 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-10-31 22:15:03,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:03,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744663083] [2024-10-31 22:15:03,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [744663083] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:03,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [383467074] [2024-10-31 22:15:03,480 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:03,480 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:03,480 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:03,483 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:03,484 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-10-31 22:15:03,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:03,577 INFO L255 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-10-31 22:15:03,579 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:03,626 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 15 treesize of output 1 [2024-10-31 22:15:03,820 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 [2024-10-31 22:15:03,843 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:03,843 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:04,202 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 33 treesize of output 29 [2024-10-31 22:15:04,218 INFO L349 Elim1Store]: treesize reduction 5, result has 37.5 percent of original size [2024-10-31 22:15:04,219 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 62 treesize of output 41 [2024-10-31 22:15:04,321 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-10-31 22:15:04,322 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [383467074] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:04,322 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:04,322 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 22 [2024-10-31 22:15:04,322 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109459066] [2024-10-31 22:15:04,323 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:04,323 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2024-10-31 22:15:04,324 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:04,324 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2024-10-31 22:15:04,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=401, Unknown=0, NotChecked=0, Total=462 [2024-10-31 22:15:05,201 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-10-31 22:15:05,202 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 101 transitions, 1227 flow. Second operand has 22 states, 22 states have (on average 18.863636363636363) internal successors, (415), 22 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:05,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:05,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-10-31 22:15:05,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:08,214 INFO L124 PetriNetUnfolderBase]: 1365/2378 cut-off events. [2024-10-31 22:15:08,214 INFO L125 PetriNetUnfolderBase]: For 12136/12136 co-relation queries the response was YES. [2024-10-31 22:15:08,223 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11971 conditions, 2378 events. 1365/2378 cut-off events. For 12136/12136 co-relation queries the response was YES. Maximal size of possible extension queue 120. Compared 12451 event pairs, 114 based on Foata normal form. 9/2387 useless extension candidates. Maximal degree in co-relation 11523. Up to 539 conditions per place. [2024-10-31 22:15:08,230 INFO L140 encePairwiseOnDemand]: 24/40 looper letters, 150 selfloop transitions, 84 changer transitions 200/435 dead transitions. [2024-10-31 22:15:08,230 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 136 places, 435 transitions, 4518 flow [2024-10-31 22:15:08,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2024-10-31 22:15:08,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2024-10-31 22:15:08,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 1045 transitions. [2024-10-31 22:15:08,234 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.5679347826086957 [2024-10-31 22:15:08,234 INFO L175 Difference]: Start difference. First operand has 93 places, 101 transitions, 1227 flow. Second operand 46 states and 1045 transitions. [2024-10-31 22:15:08,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 136 places, 435 transitions, 4518 flow [2024-10-31 22:15:08,269 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 131 places, 435 transitions, 4386 flow, removed 21 selfloop flow, removed 5 redundant places. [2024-10-31 22:15:08,274 INFO L231 Difference]: Finished difference. Result has 152 places, 132 transitions, 1597 flow [2024-10-31 22:15:08,274 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1146, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=101, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=49, PETRI_DIFFERENCE_SUBTRAHEND_STATES=46, PETRI_FLOW=1597, PETRI_PLACES=152, PETRI_TRANSITIONS=132} [2024-10-31 22:15:08,275 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 111 predicate places. [2024-10-31 22:15:08,275 INFO L471 AbstractCegarLoop]: Abstraction has has 152 places, 132 transitions, 1597 flow [2024-10-31 22:15:08,275 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 18.863636363636363) internal successors, (415), 22 states have internal predecessors, (415), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:08,275 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:08,276 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] [2024-10-31 22:15:08,296 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-10-31 22:15:08,480 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:08,480 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:15:08,481 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:08,481 INFO L85 PathProgramCache]: Analyzing trace with hash 883698250, now seen corresponding path program 2 times [2024-10-31 22:15:08,481 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:08,481 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1981758250] [2024-10-31 22:15:08,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:08,484 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:08,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-10-31 22:15:08,946 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:15:08,946 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-10-31 22:15:08,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1981758250] [2024-10-31 22:15:08,946 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1981758250] provided 0 perfect and 1 imperfect interpolant sequences [2024-10-31 22:15:08,946 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [93020436] [2024-10-31 22:15:08,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-10-31 22:15:08,947 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-10-31 22:15:08,947 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 [2024-10-31 22:15:08,949 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-10-31 22:15:08,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-10-31 22:15:09,093 INFO L227 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-10-31 22:15:09,093 INFO L228 tOrderPrioritization]: Conjunction of SSA is unsat [2024-10-31 22:15:09,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-10-31 22:15:09,096 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-10-31 22:15:09,137 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:15:09,137 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-10-31 22:15:09,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-10-31 22:15:09,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [93020436] provided 0 perfect and 2 imperfect interpolant sequences [2024-10-31 22:15:09,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-10-31 22:15:09,259 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 5, 5] total 15 [2024-10-31 22:15:09,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [351392762] [2024-10-31 22:15:09,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-10-31 22:15:09,260 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2024-10-31 22:15:09,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-10-31 22:15:09,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2024-10-31 22:15:09,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2024-10-31 22:15:09,261 INFO L467 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 40 [2024-10-31 22:15:09,262 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 152 places, 132 transitions, 1597 flow. Second operand has 15 states, 15 states have (on average 18.533333333333335) internal successors, (278), 15 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:09,262 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-10-31 22:15:09,262 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 40 [2024-10-31 22:15:09,262 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-10-31 22:15:10,320 INFO L124 PetriNetUnfolderBase]: 883/1511 cut-off events. [2024-10-31 22:15:10,321 INFO L125 PetriNetUnfolderBase]: For 16190/16190 co-relation queries the response was YES. [2024-10-31 22:15:10,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 9157 conditions, 1511 events. 883/1511 cut-off events. For 16190/16190 co-relation queries the response was YES. Maximal size of possible extension queue 61. Compared 6613 event pairs, 144 based on Foata normal form. 142/1653 useless extension candidates. Maximal degree in co-relation 9093. Up to 468 conditions per place. [2024-10-31 22:15:10,341 INFO L140 encePairwiseOnDemand]: 32/40 looper letters, 165 selfloop transitions, 76 changer transitions 0/242 dead transitions. [2024-10-31 22:15:10,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 242 transitions, 3144 flow [2024-10-31 22:15:10,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-10-31 22:15:10,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-10-31 22:15:10,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 329 transitions. [2024-10-31 22:15:10,343 INFO L512 CegarLoopForPetriNet]: DFA transition density 0.6326923076923077 [2024-10-31 22:15:10,343 INFO L175 Difference]: Start difference. First operand has 152 places, 132 transitions, 1597 flow. Second operand 13 states and 329 transitions. [2024-10-31 22:15:10,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 242 transitions, 3144 flow [2024-10-31 22:15:10,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 104 places, 242 transitions, 2774 flow, removed 156 selfloop flow, removed 27 redundant places. [2024-10-31 22:15:10,413 INFO L231 Difference]: Finished difference. Result has 111 places, 144 transitions, 1827 flow [2024-10-31 22:15:10,413 INFO L260 CegarLoopForPetriNet]: {PETRI_ALPHABET=40, PETRI_DIFFERENCE_MINUEND_FLOW=1152, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=111, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=46, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=58, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=1827, PETRI_PLACES=111, PETRI_TRANSITIONS=144} [2024-10-31 22:15:10,414 INFO L277 CegarLoopForPetriNet]: 41 programPoint places, 70 predicate places. [2024-10-31 22:15:10,414 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 144 transitions, 1827 flow [2024-10-31 22:15:10,415 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 15 states have (on average 18.533333333333335) internal successors, (278), 15 states have internal predecessors, (278), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-10-31 22:15:10,415 INFO L196 CegarLoopForPetriNet]: Found error trace [2024-10-31 22:15:10,415 INFO L204 CegarLoopForPetriNet]: trace histogram [4, 4, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-10-31 22:15:10,438 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-10-31 22:15:10,615 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d01252db-f9bf-4339-bf69-deadad823fed/bin/uautomizer-verify-4GaUIPS5ZU/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-10-31 22:15:10,617 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONMEMORY_LEAK === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread2Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 23 more)] === [2024-10-31 22:15:10,617 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-10-31 22:15:10,618 INFO L85 PathProgramCache]: Analyzing trace with hash -1240101542, now seen corresponding path program 3 times [2024-10-31 22:15:10,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-10-31 22:15:10,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580293495] [2024-10-31 22:15:10,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-10-31 22:15:10,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-10-31 22:15:10,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat