./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC --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 3dfcb4860b3021904fb2e25e7c2a428c9bcb0d82c2290cad723458395a0647ea --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 23:56:46,262 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 23:56:46,318 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-23 23:56:46,323 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 23:56:46,323 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 23:56:46,347 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 23:56:46,348 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 23:56:46,348 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 23:56:46,349 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 23:56:46,349 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 23:56:46,349 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 23:56:46,349 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 23:56:46,349 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 23:56:46,350 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 23:56:46,350 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 23:56:46,350 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 23:56:46,350 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 23:56:46,350 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 23:56:46,350 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 23:56:46,351 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 23:56:46,351 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 23:56:46,351 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 23:56:46,351 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 23:56:46,351 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 23:56:46,351 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 23:56:46,351 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 23:56:46,352 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 23:56:46,352 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 23:56:46,352 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 23:56:46,352 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 23:56:46,352 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:56:46,352 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:56:46,352 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:56:46,352 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:56:46,353 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 23:56:46,353 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 23:56:46,353 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 23:56:46,353 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 23:56:46,353 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:56:46,353 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 23:56:46,353 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 23:56:46,353 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 23:56:46,353 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 23:56:46,353 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 23:56:46,353 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 23:56:46,354 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 23:56:46,354 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 23:56:46,354 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC 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 -> 3dfcb4860b3021904fb2e25e7c2a428c9bcb0d82c2290cad723458395a0647ea [2024-11-23 23:56:46,643 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 23:56:46,655 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 23:56:46,658 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 23:56:46,660 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 23:56:46,661 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 23:56:46,662 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr.c [2024-11-23 23:56:49,634 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/data/dab21447c/73dff8566cab4ff193116b9082b1afe8/FLAG706aa7ce1 [2024-11-23 23:56:49,915 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 23:56:49,915 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/sv-benchmarks/c/weaver/popl20-prod-cons-eq.wvr.c [2024-11-23 23:56:49,924 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/data/dab21447c/73dff8566cab4ff193116b9082b1afe8/FLAG706aa7ce1 [2024-11-23 23:56:49,936 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/data/dab21447c/73dff8566cab4ff193116b9082b1afe8 [2024-11-23 23:56:49,938 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 23:56:49,939 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 23:56:49,940 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 23:56:49,940 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 23:56:49,944 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 23:56:49,945 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:56:49" (1/1) ... [2024-11-23 23:56:49,946 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@34193672 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:49, skipping insertion in model container [2024-11-23 23:56:49,946 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 11:56:49" (1/1) ... [2024-11-23 23:56:49,964 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 23:56:50,192 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:56:50,210 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:56:50,216 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-23 23:56:50,219 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:56:50,236 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 23:56:50,296 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 23:56:50,322 INFO L204 MainTranslator]: Completed translation [2024-11-23 23:56:50,322 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:50 WrapperNode [2024-11-23 23:56:50,322 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 23:56:50,323 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 23:56:50,323 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 23:56:50,323 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 23:56:50,333 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:50" (1/1) ... [2024-11-23 23:56:50,345 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:50" (1/1) ... [2024-11-23 23:56:50,390 INFO L138 Inliner]: procedures = 27, calls = 68, calls flagged for inlining = 29, calls inlined = 35, statements flattened = 398 [2024-11-23 23:56:50,390 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 23:56:50,391 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 23:56:50,391 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 23:56:50,391 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 23:56:50,404 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:50" (1/1) ... [2024-11-23 23:56:50,406 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:50" (1/1) ... [2024-11-23 23:56:50,415 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:50" (1/1) ... [2024-11-23 23:56:50,452 INFO L175 MemorySlicer]: Split 24 memory accesses to 4 slices as follows [2, 16, 3, 3]. 67 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0, 0]. The 6 writes are split as follows [0, 4, 1, 1]. [2024-11-23 23:56:50,452 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:50" (1/1) ... [2024-11-23 23:56:50,452 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:50" (1/1) ... [2024-11-23 23:56:50,480 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:50" (1/1) ... [2024-11-23 23:56:50,481 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:50" (1/1) ... [2024-11-23 23:56:50,486 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:50" (1/1) ... [2024-11-23 23:56:50,488 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:50" (1/1) ... [2024-11-23 23:56:50,490 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:50" (1/1) ... [2024-11-23 23:56:50,494 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 23:56:50,495 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 23:56:50,495 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 23:56:50,495 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 23:56:50,496 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:50" (1/1) ... [2024-11-23 23:56:50,506 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 23:56:50,523 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:56:50,540 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 23:56:50,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 23:56:50,568 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 23:56:50,570 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-23 23:56:50,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-23 23:56:50,571 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-23 23:56:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#3 [2024-11-23 23:56:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 23:56:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 23:56:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-23 23:56:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#3 [2024-11-23 23:56:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 23:56:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 23:56:50,572 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-23 23:56:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#3 [2024-11-23 23:56:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-23 23:56:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-23 23:56:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-23 23:56:50,573 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#3 [2024-11-23 23:56:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-23 23:56:50,574 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-23 23:56:50,574 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-23 23:56:50,574 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-23 23:56:50,575 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-23 23:56:50,575 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-23 23:56:50,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 23:56:50,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 23:56:50,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-23 23:56:50,575 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#3 [2024-11-23 23:56:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-11-23 23:56:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-11-23 23:56:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-23 23:56:50,578 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 23:56:50,578 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 23:56:50,580 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-23 23:56:50,736 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 23:56:50,739 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 23:56:51,710 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-23 23:56:51,711 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 23:56:52,558 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 23:56:52,559 INFO L312 CfgBuilder]: Removed 9 assume(true) statements. [2024-11-23 23:56:52,559 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:56:52 BoogieIcfgContainer [2024-11-23 23:56:52,559 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 23:56:52,561 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 23:56:52,561 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 23:56:52,568 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 23:56:52,568 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 11:56:49" (1/3) ... [2024-11-23 23:56:52,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ee3b22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:56:52, skipping insertion in model container [2024-11-23 23:56:52,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 11:56:50" (2/3) ... [2024-11-23 23:56:52,569 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@37ee3b22 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 11:56:52, skipping insertion in model container [2024-11-23 23:56:52,569 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 11:56:52" (3/3) ... [2024-11-23 23:56:52,571 INFO L128 eAbstractionObserver]: Analyzing ICFG popl20-prod-cons-eq.wvr.c [2024-11-23 23:56:52,587 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 23:56:52,589 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG popl20-prod-cons-eq.wvr.c that has 4 procedures, 97 locations, 1 initial locations, 9 loop locations, and 46 error locations. [2024-11-23 23:56:52,589 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-23 23:56:52,732 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-23 23:56:52,777 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 106 places, 106 transitions, 233 flow [2024-11-23 23:56:52,848 INFO L124 PetriNetUnfolderBase]: 10/103 cut-off events. [2024-11-23 23:56:52,851 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-23 23:56:52,856 INFO L83 FinitePrefix]: Finished finitePrefix Result has 116 conditions, 103 events. 10/103 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 16. Compared 309 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 70. Up to 2 conditions per place. [2024-11-23 23:56:52,856 INFO L82 GeneralOperation]: Start removeDead. Operand has 106 places, 106 transitions, 233 flow [2024-11-23 23:56:52,862 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 102 places, 102 transitions, 222 flow [2024-11-23 23:56:52,873 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 23:56:52,890 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;@21b7d507, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 23:56:52,890 INFO L334 AbstractCegarLoop]: Starting to check reachability of 81 error locations. [2024-11-23 23:56:52,894 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-23 23:56:52,894 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-23 23:56:52,894 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-23 23:56:52,894 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:56:52,895 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:56:52,895 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:56:52,902 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:56:52,902 INFO L85 PathProgramCache]: Analyzing trace with hash 1328620, now seen corresponding path program 1 times [2024-11-23 23:56:52,910 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:56:52,910 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907709399] [2024-11-23 23:56:52,911 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:56:52,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:56:53,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:56:53,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:56:53,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:56:53,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907709399] [2024-11-23 23:56:53,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907709399] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:56:53,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:56:53,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 23:56:53,226 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [600962940] [2024-11-23 23:56:53,226 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:56:53,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:56:53,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:56:53,267 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:56:53,267 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:56:53,336 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-23 23:56:53,339 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 102 transitions, 222 flow. Second operand has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:53,340 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:56:53,340 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-23 23:56:53,341 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:56:55,813 INFO L124 PetriNetUnfolderBase]: 5748/11621 cut-off events. [2024-11-23 23:56:55,814 INFO L125 PetriNetUnfolderBase]: For 228/228 co-relation queries the response was YES. [2024-11-23 23:56:55,844 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19700 conditions, 11621 events. 5748/11621 cut-off events. For 228/228 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 115079 event pairs, 4141 based on Foata normal form. 1/6125 useless extension candidates. Maximal degree in co-relation 19012. Up to 7739 conditions per place. [2024-11-23 23:56:55,913 INFO L140 encePairwiseOnDemand]: 93/106 looper letters, 52 selfloop transitions, 4 changer transitions 0/92 dead transitions. [2024-11-23 23:56:55,914 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 94 places, 92 transitions, 314 flow [2024-11-23 23:56:55,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:56:55,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:56:55,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2024-11-23 23:56:55,930 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5817610062893082 [2024-11-23 23:56:55,932 INFO L175 Difference]: Start difference. First operand has 102 places, 102 transitions, 222 flow. Second operand 3 states and 185 transitions. [2024-11-23 23:56:55,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 94 places, 92 transitions, 314 flow [2024-11-23 23:56:55,956 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 88 places, 92 transitions, 302 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-23 23:56:55,959 INFO L231 Difference]: Finished difference. Result has 88 places, 92 transitions, 198 flow [2024-11-23 23:56:55,962 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=198, PETRI_PLACES=88, PETRI_TRANSITIONS=92} [2024-11-23 23:56:55,966 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, -14 predicate places. [2024-11-23 23:56:55,966 INFO L471 AbstractCegarLoop]: Abstraction has has 88 places, 92 transitions, 198 flow [2024-11-23 23:56:55,966 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 41.0) internal successors, (123), 3 states have internal predecessors, (123), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:55,966 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:56:55,966 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-23 23:56:55,967 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 23:56:55,967 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:56:55,967 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:56:55,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1328621, now seen corresponding path program 1 times [2024-11-23 23:56:55,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:56:55,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [416729436] [2024-11-23 23:56:55,971 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:56:55,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:56:56,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:56:56,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:56:56,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:56:56,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [416729436] [2024-11-23 23:56:56,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [416729436] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:56:56,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:56:56,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:56:56,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [357582975] [2024-11-23 23:56:56,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:56:56,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:56:56,404 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:56:56,404 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:56:56,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:56:56,507 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-23 23:56:56,507 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 88 places, 92 transitions, 198 flow. Second operand has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:56,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:56:56,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-23 23:56:56,507 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:56:58,265 INFO L124 PetriNetUnfolderBase]: 5749/11624 cut-off events. [2024-11-23 23:56:58,266 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-23 23:56:58,289 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19509 conditions, 11624 events. 5749/11624 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 888. Compared 115036 event pairs, 4141 based on Foata normal form. 0/6125 useless extension candidates. Maximal degree in co-relation 19456. Up to 7756 conditions per place. [2024-11-23 23:56:58,353 INFO L140 encePairwiseOnDemand]: 101/106 looper letters, 59 selfloop transitions, 4 changer transitions 0/95 dead transitions. [2024-11-23 23:56:58,353 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 91 places, 95 transitions, 330 flow [2024-11-23 23:56:58,354 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:56:58,354 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:56:58,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 224 transitions. [2024-11-23 23:56:58,356 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5283018867924528 [2024-11-23 23:56:58,356 INFO L175 Difference]: Start difference. First operand has 88 places, 92 transitions, 198 flow. Second operand 4 states and 224 transitions. [2024-11-23 23:56:58,356 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 91 places, 95 transitions, 330 flow [2024-11-23 23:56:58,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 89 places, 95 transitions, 322 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:56:58,363 INFO L231 Difference]: Finished difference. Result has 91 places, 95 transitions, 217 flow [2024-11-23 23:56:58,363 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=190, PETRI_DIFFERENCE_MINUEND_PLACES=86, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=92, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=217, PETRI_PLACES=91, PETRI_TRANSITIONS=95} [2024-11-23 23:56:58,364 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, -11 predicate places. [2024-11-23 23:56:58,364 INFO L471 AbstractCegarLoop]: Abstraction has has 91 places, 95 transitions, 217 flow [2024-11-23 23:56:58,364 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 40.75) internal successors, (163), 4 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:58,364 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:56:58,364 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1] [2024-11-23 23:56:58,364 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 23:56:58,365 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:56:58,365 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:56:58,365 INFO L85 PathProgramCache]: Analyzing trace with hash 41188281, now seen corresponding path program 1 times [2024-11-23 23:56:58,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:56:58,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104430234] [2024-11-23 23:56:58,365 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:56:58,365 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:56:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:56:58,813 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:56:58,814 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:56:58,814 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104430234] [2024-11-23 23:56:58,814 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [104430234] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:56:58,814 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:56:58,814 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:56:58,814 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995358390] [2024-11-23 23:56:58,814 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:56:58,815 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:56:58,815 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:56:58,815 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:56:58,817 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:56:58,973 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-23 23:56:58,973 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 91 places, 95 transitions, 217 flow. Second operand has 5 states, 5 states have (on average 40.8) internal successors, (204), 5 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:56:58,974 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:56:58,974 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-23 23:56:58,974 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:00,540 INFO L124 PetriNetUnfolderBase]: 5750/11627 cut-off events. [2024-11-23 23:57:00,540 INFO L125 PetriNetUnfolderBase]: For 48/48 co-relation queries the response was YES. [2024-11-23 23:57:00,567 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19524 conditions, 11627 events. 5750/11627 cut-off events. For 48/48 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 114951 event pairs, 4141 based on Foata normal form. 0/6125 useless extension candidates. Maximal degree in co-relation 19499. Up to 7755 conditions per place. [2024-11-23 23:57:00,615 INFO L140 encePairwiseOnDemand]: 98/106 looper letters, 59 selfloop transitions, 7 changer transitions 0/98 dead transitions. [2024-11-23 23:57:00,616 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 95 places, 98 transitions, 355 flow [2024-11-23 23:57:00,616 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:57:00,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:57:00,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-11-23 23:57:00,619 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5037735849056604 [2024-11-23 23:57:00,619 INFO L175 Difference]: Start difference. First operand has 91 places, 95 transitions, 217 flow. Second operand 5 states and 267 transitions. [2024-11-23 23:57:00,619 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 95 places, 98 transitions, 355 flow [2024-11-23 23:57:00,620 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 98 transitions, 352 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:57:00,625 INFO L231 Difference]: Finished difference. Result has 96 places, 98 transitions, 251 flow [2024-11-23 23:57:00,625 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=214, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=95, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=251, PETRI_PLACES=96, PETRI_TRANSITIONS=98} [2024-11-23 23:57:00,626 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, -6 predicate places. [2024-11-23 23:57:00,626 INFO L471 AbstractCegarLoop]: Abstraction has has 96 places, 98 transitions, 251 flow [2024-11-23 23:57:00,626 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 40.8) internal successors, (204), 5 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:00,626 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:00,626 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1] [2024-11-23 23:57:00,626 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 23:57:00,626 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:57:00,629 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:00,629 INFO L85 PathProgramCache]: Analyzing trace with hash 1276836640, now seen corresponding path program 1 times [2024-11-23 23:57:00,629 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:00,629 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1069099296] [2024-11-23 23:57:00,629 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:00,630 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:00,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:00,985 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:00,985 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:00,986 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1069099296] [2024-11-23 23:57:00,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1069099296] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:57:00,986 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:57:00,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:57:00,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [223577166] [2024-11-23 23:57:00,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:57:00,987 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:57:00,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:00,987 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:57:00,988 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:57:01,171 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-23 23:57:01,172 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 96 places, 98 transitions, 251 flow. Second operand has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:01,172 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:01,172 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-23 23:57:01,173 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:02,557 INFO L124 PetriNetUnfolderBase]: 5751/11630 cut-off events. [2024-11-23 23:57:02,558 INFO L125 PetriNetUnfolderBase]: For 51/51 co-relation queries the response was YES. [2024-11-23 23:57:02,580 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19546 conditions, 11630 events. 5751/11630 cut-off events. For 51/51 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 115065 event pairs, 4141 based on Foata normal form. 0/6129 useless extension candidates. Maximal degree in co-relation 19515. Up to 7758 conditions per place. [2024-11-23 23:57:02,632 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 60 selfloop transitions, 9 changer transitions 0/101 dead transitions. [2024-11-23 23:57:02,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 100 places, 101 transitions, 395 flow [2024-11-23 23:57:02,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:57:02,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:57:02,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 267 transitions. [2024-11-23 23:57:02,634 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5037735849056604 [2024-11-23 23:57:02,634 INFO L175 Difference]: Start difference. First operand has 96 places, 98 transitions, 251 flow. Second operand 5 states and 267 transitions. [2024-11-23 23:57:02,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 100 places, 101 transitions, 395 flow [2024-11-23 23:57:02,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 99 places, 101 transitions, 394 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:57:02,637 INFO L231 Difference]: Finished difference. Result has 101 places, 101 transitions, 293 flow [2024-11-23 23:57:02,638 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=250, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=98, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=6, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=89, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=293, PETRI_PLACES=101, PETRI_TRANSITIONS=101} [2024-11-23 23:57:02,638 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, -1 predicate places. [2024-11-23 23:57:02,638 INFO L471 AbstractCegarLoop]: Abstraction has has 101 places, 101 transitions, 293 flow [2024-11-23 23:57:02,639 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.0) internal successors, (205), 5 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:02,639 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:02,639 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-23 23:57:02,639 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-23 23:57:02,639 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:57:02,639 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:02,640 INFO L85 PathProgramCache]: Analyzing trace with hash 1276847584, now seen corresponding path program 1 times [2024-11-23 23:57:02,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:02,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1166183234] [2024-11-23 23:57:02,640 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:02,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:02,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:02,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:02,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1166183234] [2024-11-23 23:57:02,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1166183234] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:02,978 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108490977] [2024-11-23 23:57:02,978 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:02,978 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:02,978 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:57:02,983 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:57:02,987 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 23:57:03,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:03,113 INFO L256 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 23:57:03,117 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:57:03,190 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-23 23:57:03,465 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:03,465 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:57:03,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:03,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1108490977] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:57:03,648 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:57:03,648 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 9 [2024-11-23 23:57:03,648 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [670114958] [2024-11-23 23:57:03,648 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:57:03,648 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 23:57:03,649 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:03,649 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 23:57:03,649 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2024-11-23 23:57:04,124 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-23 23:57:04,126 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 101 places, 101 transitions, 293 flow. Second operand has 11 states, 11 states have (on average 41.36363636363637) internal successors, (455), 11 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:04,126 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:04,126 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-23 23:57:04,126 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:06,078 INFO L124 PetriNetUnfolderBase]: 5751/11629 cut-off events. [2024-11-23 23:57:06,078 INFO L125 PetriNetUnfolderBase]: For 56/56 co-relation queries the response was YES. [2024-11-23 23:57:06,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19564 conditions, 11629 events. 5751/11629 cut-off events. For 56/56 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 115356 event pairs, 4141 based on Foata normal form. 0/6131 useless extension candidates. Maximal degree in co-relation 19530. Up to 7758 conditions per place. [2024-11-23 23:57:06,176 INFO L140 encePairwiseOnDemand]: 101/106 looper letters, 61 selfloop transitions, 7 changer transitions 0/100 dead transitions. [2024-11-23 23:57:06,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 100 transitions, 425 flow [2024-11-23 23:57:06,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:57:06,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:57:06,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 303 transitions. [2024-11-23 23:57:06,178 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.47641509433962265 [2024-11-23 23:57:06,179 INFO L175 Difference]: Start difference. First operand has 101 places, 101 transitions, 293 flow. Second operand 6 states and 303 transitions. [2024-11-23 23:57:06,179 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 100 transitions, 425 flow [2024-11-23 23:57:06,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 100 transitions, 418 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:57:06,182 INFO L231 Difference]: Finished difference. Result has 103 places, 100 transitions, 296 flow [2024-11-23 23:57:06,182 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=282, PETRI_DIFFERENCE_MINUEND_PLACES=98, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=100, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=7, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=93, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=296, PETRI_PLACES=103, PETRI_TRANSITIONS=100} [2024-11-23 23:57:06,183 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, 1 predicate places. [2024-11-23 23:57:06,183 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 100 transitions, 296 flow [2024-11-23 23:57:06,183 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 41.36363636363637) internal successors, (455), 11 states have internal predecessors, (455), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:06,183 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:06,183 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1] [2024-11-23 23:57:06,195 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-23 23:57:06,384 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:06,384 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:57:06,385 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:06,385 INFO L85 PathProgramCache]: Analyzing trace with hash 927275443, now seen corresponding path program 1 times [2024-11-23 23:57:06,385 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:06,385 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985188082] [2024-11-23 23:57:06,385 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:06,385 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:06,405 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:06,669 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:06,669 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:06,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985188082] [2024-11-23 23:57:06,669 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985188082] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:06,669 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1054549165] [2024-11-23 23:57:06,669 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:06,669 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:06,669 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:57:06,671 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:57:06,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 23:57:06,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:06,794 INFO L256 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 23:57:06,796 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:57:06,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-23 23:57:07,035 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:07,035 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:57:07,288 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:07,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1054549165] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:57:07,289 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:57:07,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-23 23:57:07,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76386091] [2024-11-23 23:57:07,289 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:57:07,289 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 23:57:07,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:07,290 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 23:57:07,290 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:57:07,922 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-23 23:57:07,923 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 100 transitions, 296 flow. Second operand has 13 states, 13 states have (on average 41.30769230769231) internal successors, (537), 13 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:07,923 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:07,923 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-23 23:57:07,923 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:09,259 INFO L124 PetriNetUnfolderBase]: 5751/11628 cut-off events. [2024-11-23 23:57:09,259 INFO L125 PetriNetUnfolderBase]: For 54/54 co-relation queries the response was YES. [2024-11-23 23:57:09,284 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19564 conditions, 11628 events. 5751/11628 cut-off events. For 54/54 co-relation queries the response was YES. Maximal size of possible extension queue 887. Compared 115349 event pairs, 4141 based on Foata normal form. 0/6131 useless extension candidates. Maximal degree in co-relation 19526. Up to 7750 conditions per place. [2024-11-23 23:57:09,325 INFO L140 encePairwiseOnDemand]: 98/106 looper letters, 55 selfloop transitions, 12 changer transitions 0/99 dead transitions. [2024-11-23 23:57:09,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 99 transitions, 426 flow [2024-11-23 23:57:09,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-23 23:57:09,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-11-23 23:57:09,327 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 345 transitions. [2024-11-23 23:57:09,327 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.46495956873315364 [2024-11-23 23:57:09,327 INFO L175 Difference]: Start difference. First operand has 103 places, 100 transitions, 296 flow. Second operand 7 states and 345 transitions. [2024-11-23 23:57:09,327 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 99 transitions, 426 flow [2024-11-23 23:57:09,329 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 99 transitions, 392 flow, removed 3 selfloop flow, removed 8 redundant places. [2024-11-23 23:57:09,330 INFO L231 Difference]: Finished difference. Result has 100 places, 99 transitions, 282 flow [2024-11-23 23:57:09,330 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=258, PETRI_DIFFERENCE_MINUEND_PLACES=94, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=282, PETRI_PLACES=100, PETRI_TRANSITIONS=99} [2024-11-23 23:57:09,331 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, -2 predicate places. [2024-11-23 23:57:09,331 INFO L471 AbstractCegarLoop]: Abstraction has has 100 places, 99 transitions, 282 flow [2024-11-23 23:57:09,331 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.30769230769231) internal successors, (537), 13 states have internal predecessors, (537), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:09,332 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:09,332 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-23 23:57:09,341 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-23 23:57:09,532 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:09,533 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:57:09,533 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:09,533 INFO L85 PathProgramCache]: Analyzing trace with hash 927234357, now seen corresponding path program 1 times [2024-11-23 23:57:09,533 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:09,533 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1538498533] [2024-11-23 23:57:09,534 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:09,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:09,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:09,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:09,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1538498533] [2024-11-23 23:57:09,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1538498533] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:57:09,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:57:09,666 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:57:09,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514067330] [2024-11-23 23:57:09,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:57:09,666 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:57:09,667 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:09,667 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:57:09,667 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:57:09,693 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-23 23:57:09,694 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 100 places, 99 transitions, 282 flow. Second operand has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:09,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:09,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-23 23:57:09,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:10,876 INFO L124 PetriNetUnfolderBase]: 7474/15889 cut-off events. [2024-11-23 23:57:10,876 INFO L125 PetriNetUnfolderBase]: For 73/73 co-relation queries the response was YES. [2024-11-23 23:57:10,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26445 conditions, 15889 events. 7474/15889 cut-off events. For 73/73 co-relation queries the response was YES. Maximal size of possible extension queue 1194. Compared 169618 event pairs, 5726 based on Foata normal form. 236/8585 useless extension candidates. Maximal degree in co-relation 26380. Up to 7712 conditions per place. [2024-11-23 23:57:10,935 INFO L140 encePairwiseOnDemand]: 94/106 looper letters, 99 selfloop transitions, 11 changer transitions 0/144 dead transitions. [2024-11-23 23:57:10,935 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 105 places, 144 transitions, 612 flow [2024-11-23 23:57:10,936 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:57:10,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:57:10,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 371 transitions. [2024-11-23 23:57:10,937 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5833333333333334 [2024-11-23 23:57:10,937 INFO L175 Difference]: Start difference. First operand has 100 places, 99 transitions, 282 flow. Second operand 6 states and 371 transitions. [2024-11-23 23:57:10,937 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 105 places, 144 transitions, 612 flow [2024-11-23 23:57:10,939 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 100 places, 144 transitions, 587 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-11-23 23:57:10,940 INFO L231 Difference]: Finished difference. Result has 103 places, 106 transitions, 334 flow [2024-11-23 23:57:10,940 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=257, PETRI_DIFFERENCE_MINUEND_PLACES=95, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=99, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=334, PETRI_PLACES=103, PETRI_TRANSITIONS=106} [2024-11-23 23:57:10,941 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, 1 predicate places. [2024-11-23 23:57:10,941 INFO L471 AbstractCegarLoop]: Abstraction has has 103 places, 106 transitions, 334 flow [2024-11-23 23:57:10,941 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 45.0) internal successors, (225), 5 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:10,941 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:10,941 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1] [2024-11-23 23:57:10,941 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-23 23:57:10,941 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:57:10,942 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:10,942 INFO L85 PathProgramCache]: Analyzing trace with hash -1320593186, now seen corresponding path program 1 times [2024-11-23 23:57:10,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:10,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1787630532] [2024-11-23 23:57:10,942 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:10,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:11,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:11,250 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:11,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1787630532] [2024-11-23 23:57:11,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1787630532] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:11,250 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2044564] [2024-11-23 23:57:11,250 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:11,250 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:11,250 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:57:11,252 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:57:11,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 23:57:11,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:11,374 INFO L256 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 23:57:11,376 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:57:11,396 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-23 23:57:11,602 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:11,602 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:57:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:11,785 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2044564] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:57:11,785 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:57:11,785 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-23 23:57:11,785 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099163405] [2024-11-23 23:57:11,785 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:57:11,785 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 23:57:11,786 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:11,786 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 23:57:11,786 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:57:12,346 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-23 23:57:12,347 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 103 places, 106 transitions, 334 flow. Second operand has 13 states, 13 states have (on average 41.46153846153846) internal successors, (539), 13 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:12,347 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:12,347 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-23 23:57:12,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:14,456 INFO L124 PetriNetUnfolderBase]: 7774/15401 cut-off events. [2024-11-23 23:57:14,456 INFO L125 PetriNetUnfolderBase]: For 438/438 co-relation queries the response was YES. [2024-11-23 23:57:14,477 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26756 conditions, 15401 events. 7774/15401 cut-off events. For 438/438 co-relation queries the response was YES. Maximal size of possible extension queue 1199. Compared 155916 event pairs, 5906 based on Foata normal form. 0/8036 useless extension candidates. Maximal degree in co-relation 26660. Up to 10679 conditions per place. [2024-11-23 23:57:14,521 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 55 selfloop transitions, 25 changer transitions 0/112 dead transitions. [2024-11-23 23:57:14,521 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 110 places, 112 transitions, 526 flow [2024-11-23 23:57:14,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:57:14,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 23:57:14,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 431 transitions. [2024-11-23 23:57:14,523 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.45178197064989517 [2024-11-23 23:57:14,524 INFO L175 Difference]: Start difference. First operand has 103 places, 106 transitions, 334 flow. Second operand 9 states and 431 transitions. [2024-11-23 23:57:14,524 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 110 places, 112 transitions, 526 flow [2024-11-23 23:57:14,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 112 transitions, 522 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:57:14,529 INFO L231 Difference]: Finished difference. Result has 109 places, 112 transitions, 412 flow [2024-11-23 23:57:14,529 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=327, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=105, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=87, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=412, PETRI_PLACES=109, PETRI_TRANSITIONS=112} [2024-11-23 23:57:14,529 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, 7 predicate places. [2024-11-23 23:57:14,530 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 112 transitions, 412 flow [2024-11-23 23:57:14,530 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.46153846153846) internal successors, (539), 13 states have internal predecessors, (539), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:14,530 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:14,530 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:14,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-23 23:57:14,730 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:14,731 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:57:14,731 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:14,731 INFO L85 PathProgramCache]: Analyzing trace with hash 2014128823, now seen corresponding path program 1 times [2024-11-23 23:57:14,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:14,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201124471] [2024-11-23 23:57:14,731 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:14,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:14,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:14,936 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:14,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:14,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201124471] [2024-11-23 23:57:14,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201124471] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:57:14,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:57:14,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:57:14,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1237302155] [2024-11-23 23:57:14,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:57:14,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:57:14,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:14,937 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:57:14,937 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:57:14,975 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 41 out of 106 [2024-11-23 23:57:14,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 112 transitions, 412 flow. Second operand has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:14,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:14,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 41 of 106 [2024-11-23 23:57:14,976 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:16,207 INFO L124 PetriNetUnfolderBase]: 7703/14868 cut-off events. [2024-11-23 23:57:16,207 INFO L125 PetriNetUnfolderBase]: For 427/427 co-relation queries the response was YES. [2024-11-23 23:57:16,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26139 conditions, 14868 events. 7703/14868 cut-off events. For 427/427 co-relation queries the response was YES. Maximal size of possible extension queue 1164. Compared 145860 event pairs, 5942 based on Foata normal form. 0/8234 useless extension candidates. Maximal degree in co-relation 26019. Up to 10596 conditions per place. [2024-11-23 23:57:16,258 INFO L140 encePairwiseOnDemand]: 102/106 looper letters, 77 selfloop transitions, 2 changer transitions 0/109 dead transitions. [2024-11-23 23:57:16,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 108 places, 109 transitions, 564 flow [2024-11-23 23:57:16,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:57:16,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:57:16,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 182 transitions. [2024-11-23 23:57:16,259 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5723270440251572 [2024-11-23 23:57:16,259 INFO L175 Difference]: Start difference. First operand has 109 places, 112 transitions, 412 flow. Second operand 3 states and 182 transitions. [2024-11-23 23:57:16,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 108 places, 109 transitions, 564 flow [2024-11-23 23:57:16,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 102 places, 109 transitions, 510 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-11-23 23:57:16,263 INFO L231 Difference]: Finished difference. Result has 102 places, 109 transitions, 356 flow [2024-11-23 23:57:16,263 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=352, PETRI_DIFFERENCE_MINUEND_PLACES=100, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=356, PETRI_PLACES=102, PETRI_TRANSITIONS=109} [2024-11-23 23:57:16,264 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, 0 predicate places. [2024-11-23 23:57:16,264 INFO L471 AbstractCegarLoop]: Abstraction has has 102 places, 109 transitions, 356 flow [2024-11-23 23:57:16,264 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 43.666666666666664) internal successors, (131), 3 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:16,264 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:16,264 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:16,264 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-23 23:57:16,264 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:57:16,265 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:16,265 INFO L85 PathProgramCache]: Analyzing trace with hash 2014128824, now seen corresponding path program 1 times [2024-11-23 23:57:16,265 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:16,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241882372] [2024-11-23 23:57:16,265 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:16,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:16,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:16,555 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:16,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:16,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241882372] [2024-11-23 23:57:16,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [241882372] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:57:16,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:57:16,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:57:16,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61289805] [2024-11-23 23:57:16,556 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:57:16,556 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:57:16,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:16,556 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:57:16,556 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:57:16,760 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-23 23:57:16,761 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 102 places, 109 transitions, 356 flow. Second operand has 6 states, 6 states have (on average 41.333333333333336) internal successors, (248), 6 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:16,761 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:16,761 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-23 23:57:16,761 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:18,096 INFO L124 PetriNetUnfolderBase]: 7638/14880 cut-off events. [2024-11-23 23:57:18,096 INFO L125 PetriNetUnfolderBase]: For 425/425 co-relation queries the response was YES. [2024-11-23 23:57:18,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26057 conditions, 14880 events. 7638/14880 cut-off events. For 425/425 co-relation queries the response was YES. Maximal size of possible extension queue 1206. Compared 148079 event pairs, 5872 based on Foata normal form. 0/8190 useless extension candidates. Maximal degree in co-relation 19125. Up to 10550 conditions per place. [2024-11-23 23:57:18,149 INFO L140 encePairwiseOnDemand]: 99/106 looper letters, 80 selfloop transitions, 9 changer transitions 0/118 dead transitions. [2024-11-23 23:57:18,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 107 places, 118 transitions, 570 flow [2024-11-23 23:57:18,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:57:18,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:57:18,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 304 transitions. [2024-11-23 23:57:18,151 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4779874213836478 [2024-11-23 23:57:18,151 INFO L175 Difference]: Start difference. First operand has 102 places, 109 transitions, 356 flow. Second operand 6 states and 304 transitions. [2024-11-23 23:57:18,151 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 107 places, 118 transitions, 570 flow [2024-11-23 23:57:18,152 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 106 places, 118 transitions, 568 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:57:18,154 INFO L231 Difference]: Finished difference. Result has 109 places, 115 transitions, 422 flow [2024-11-23 23:57:18,154 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=109, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=422, PETRI_PLACES=109, PETRI_TRANSITIONS=115} [2024-11-23 23:57:18,154 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, 7 predicate places. [2024-11-23 23:57:18,154 INFO L471 AbstractCegarLoop]: Abstraction has has 109 places, 115 transitions, 422 flow [2024-11-23 23:57:18,155 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 41.333333333333336) internal successors, (248), 6 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:18,155 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:18,155 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:18,155 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-23 23:57:18,155 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:57:18,155 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:18,155 INFO L85 PathProgramCache]: Analyzing trace with hash 2053472431, now seen corresponding path program 1 times [2024-11-23 23:57:18,155 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:18,156 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802764209] [2024-11-23 23:57:18,156 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:18,156 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:18,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:57:18,392 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:18,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802764209] [2024-11-23 23:57:18,392 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802764209] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:18,392 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530162852] [2024-11-23 23:57:18,392 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:18,393 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:18,393 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:57:18,395 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:57:18,398 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 23:57:18,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:18,520 INFO L256 TraceCheckSpWp]: Trace formula consists of 186 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-23 23:57:18,522 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:57:18,599 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-23 23:57:18,617 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:18,617 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:57:18,720 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:18,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1530162852] provided 1 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:18,721 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2024-11-23 23:57:18,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [7, 4] total 14 [2024-11-23 23:57:18,721 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [815954317] [2024-11-23 23:57:18,721 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:57:18,721 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:57:18,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:18,722 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:57:18,722 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2024-11-23 23:57:18,806 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 106 [2024-11-23 23:57:18,807 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 109 places, 115 transitions, 422 flow. Second operand has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:18,807 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:18,807 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 106 [2024-11-23 23:57:18,807 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:20,117 INFO L124 PetriNetUnfolderBase]: 6628/13839 cut-off events. [2024-11-23 23:57:20,117 INFO L125 PetriNetUnfolderBase]: For 405/405 co-relation queries the response was YES. [2024-11-23 23:57:20,140 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23652 conditions, 13839 events. 6628/13839 cut-off events. For 405/405 co-relation queries the response was YES. Maximal size of possible extension queue 1046. Compared 143550 event pairs, 5061 based on Foata normal form. 0/7539 useless extension candidates. Maximal degree in co-relation 23562. Up to 6846 conditions per place. [2024-11-23 23:57:20,170 INFO L140 encePairwiseOnDemand]: 98/106 looper letters, 118 selfloop transitions, 11 changer transitions 0/159 dead transitions. [2024-11-23 23:57:20,170 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 159 transitions, 814 flow [2024-11-23 23:57:20,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 23:57:20,170 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-23 23:57:20,171 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 358 transitions. [2024-11-23 23:57:20,172 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5628930817610063 [2024-11-23 23:57:20,172 INFO L175 Difference]: Start difference. First operand has 109 places, 115 transitions, 422 flow. Second operand 6 states and 358 transitions. [2024-11-23 23:57:20,172 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 159 transitions, 814 flow [2024-11-23 23:57:20,174 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 112 places, 159 transitions, 805 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:57:20,176 INFO L231 Difference]: Finished difference. Result has 113 places, 117 transitions, 458 flow [2024-11-23 23:57:20,177 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=416, PETRI_DIFFERENCE_MINUEND_PLACES=107, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=115, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=458, PETRI_PLACES=113, PETRI_TRANSITIONS=117} [2024-11-23 23:57:20,177 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, 11 predicate places. [2024-11-23 23:57:20,178 INFO L471 AbstractCegarLoop]: Abstraction has has 113 places, 117 transitions, 458 flow [2024-11-23 23:57:20,178 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 44.333333333333336) internal successors, (266), 6 states have internal predecessors, (266), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:20,178 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:20,178 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:20,188 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2024-11-23 23:57:20,382 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:20,382 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:57:20,382 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:20,382 INFO L85 PathProgramCache]: Analyzing trace with hash 2053472430, now seen corresponding path program 1 times [2024-11-23 23:57:20,382 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:20,382 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548806530] [2024-11-23 23:57:20,382 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:20,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:20,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:20,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:57:20,435 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:20,435 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548806530] [2024-11-23 23:57:20,435 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548806530] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:57:20,435 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:57:20,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:57:20,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95185033] [2024-11-23 23:57:20,436 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:57:20,436 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:57:20,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:20,436 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:57:20,436 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:57:20,470 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 43 out of 106 [2024-11-23 23:57:20,471 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 117 transitions, 458 flow. Second operand has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:20,471 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:20,471 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 43 of 106 [2024-11-23 23:57:20,471 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:21,859 INFO L124 PetriNetUnfolderBase]: 6891/13460 cut-off events. [2024-11-23 23:57:21,860 INFO L125 PetriNetUnfolderBase]: For 408/408 co-relation queries the response was YES. [2024-11-23 23:57:21,896 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23619 conditions, 13460 events. 6891/13460 cut-off events. For 408/408 co-relation queries the response was YES. Maximal size of possible extension queue 1044. Compared 131786 event pairs, 5220 based on Foata normal form. 2/7254 useless extension candidates. Maximal degree in co-relation 23530. Up to 9501 conditions per place. [2024-11-23 23:57:21,934 INFO L140 encePairwiseOnDemand]: 103/106 looper letters, 77 selfloop transitions, 9 changer transitions 0/116 dead transitions. [2024-11-23 23:57:21,934 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 114 places, 116 transitions, 628 flow [2024-11-23 23:57:21,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:57:21,934 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:57:21,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 185 transitions. [2024-11-23 23:57:21,935 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5817610062893082 [2024-11-23 23:57:21,935 INFO L175 Difference]: Start difference. First operand has 113 places, 117 transitions, 458 flow. Second operand 3 states and 185 transitions. [2024-11-23 23:57:21,935 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 114 places, 116 transitions, 628 flow [2024-11-23 23:57:21,937 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 111 places, 116 transitions, 616 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-11-23 23:57:21,939 INFO L231 Difference]: Finished difference. Result has 111 places, 116 transitions, 462 flow [2024-11-23 23:57:21,939 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=9, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=107, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=462, PETRI_PLACES=111, PETRI_TRANSITIONS=116} [2024-11-23 23:57:21,940 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, 9 predicate places. [2024-11-23 23:57:21,940 INFO L471 AbstractCegarLoop]: Abstraction has has 111 places, 116 transitions, 462 flow [2024-11-23 23:57:21,940 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 45.666666666666664) internal successors, (137), 3 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:21,940 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:21,940 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:21,940 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-11-23 23:57:21,940 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:57:21,941 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:21,941 INFO L85 PathProgramCache]: Analyzing trace with hash 2014128803, now seen corresponding path program 1 times [2024-11-23 23:57:21,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:21,941 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111880330] [2024-11-23 23:57:21,941 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:21,941 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:21,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:22,183 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:22,183 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:22,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111880330] [2024-11-23 23:57:22,184 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2111880330] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:57:22,184 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:57:22,184 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:57:22,184 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585164418] [2024-11-23 23:57:22,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:57:22,184 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-23 23:57:22,185 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:22,185 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-23 23:57:22,185 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-23 23:57:22,299 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-23 23:57:22,300 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 111 places, 116 transitions, 462 flow. Second operand has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:22,300 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:22,300 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-23 23:57:22,300 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:23,857 INFO L124 PetriNetUnfolderBase]: 6893/13464 cut-off events. [2024-11-23 23:57:23,857 INFO L125 PetriNetUnfolderBase]: For 423/423 co-relation queries the response was YES. [2024-11-23 23:57:23,887 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23644 conditions, 13464 events. 6893/13464 cut-off events. For 423/423 co-relation queries the response was YES. Maximal size of possible extension queue 1044. Compared 131813 event pairs, 5220 based on Foata normal form. 4/7257 useless extension candidates. Maximal degree in co-relation 23540. Up to 9510 conditions per place. [2024-11-23 23:57:23,921 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 76 selfloop transitions, 15 changer transitions 0/120 dead transitions. [2024-11-23 23:57:23,921 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 120 transitions, 664 flow [2024-11-23 23:57:23,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:57:23,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:57:23,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 263 transitions. [2024-11-23 23:57:23,922 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4962264150943396 [2024-11-23 23:57:23,922 INFO L175 Difference]: Start difference. First operand has 111 places, 116 transitions, 462 flow. Second operand 5 states and 263 transitions. [2024-11-23 23:57:23,922 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 120 transitions, 664 flow [2024-11-23 23:57:23,925 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 113 places, 120 transitions, 646 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:57:23,927 INFO L231 Difference]: Finished difference. Result has 115 places, 120 transitions, 521 flow [2024-11-23 23:57:23,927 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=444, PETRI_DIFFERENCE_MINUEND_PLACES=109, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=116, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=101, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=521, PETRI_PLACES=115, PETRI_TRANSITIONS=120} [2024-11-23 23:57:23,928 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, 13 predicate places. [2024-11-23 23:57:23,928 INFO L471 AbstractCegarLoop]: Abstraction has has 115 places, 120 transitions, 521 flow [2024-11-23 23:57:23,928 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 41.6) internal successors, (208), 5 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:23,928 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:23,928 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:23,928 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-11-23 23:57:23,929 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:57:23,929 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:23,929 INFO L85 PathProgramCache]: Analyzing trace with hash -1452425876, now seen corresponding path program 1 times [2024-11-23 23:57:23,929 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:23,929 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2001432995] [2024-11-23 23:57:23,929 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:23,930 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:23,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:24,208 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:24,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:24,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2001432995] [2024-11-23 23:57:24,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2001432995] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:24,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206207246] [2024-11-23 23:57:24,209 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:24,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:24,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:57:24,211 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:57:24,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 23:57:24,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:24,463 INFO L256 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 23:57:24,464 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:57:24,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-23 23:57:24,681 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:24,681 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:57:24,875 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:24,875 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1206207246] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:57:24,875 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:57:24,875 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2024-11-23 23:57:24,875 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202696683] [2024-11-23 23:57:24,875 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:57:24,875 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2024-11-23 23:57:24,876 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:24,877 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2024-11-23 23:57:24,877 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2024-11-23 23:57:25,492 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-23 23:57:25,493 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 115 places, 120 transitions, 521 flow. Second operand has 13 states, 13 states have (on average 41.92307692307692) internal successors, (545), 13 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:25,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:25,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-23 23:57:25,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:26,868 INFO L124 PetriNetUnfolderBase]: 6897/13472 cut-off events. [2024-11-23 23:57:26,868 INFO L125 PetriNetUnfolderBase]: For 452/452 co-relation queries the response was YES. [2024-11-23 23:57:26,898 INFO L83 FinitePrefix]: Finished finitePrefix Result has 23726 conditions, 13472 events. 6897/13472 cut-off events. For 452/452 co-relation queries the response was YES. Maximal size of possible extension queue 1044. Compared 131989 event pairs, 5220 based on Foata normal form. 8/7270 useless extension candidates. Maximal degree in co-relation 23562. Up to 9493 conditions per place. [2024-11-23 23:57:26,928 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 65 selfloop transitions, 29 changer transitions 0/123 dead transitions. [2024-11-23 23:57:26,928 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 122 places, 123 transitions, 733 flow [2024-11-23 23:57:26,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-23 23:57:26,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-23 23:57:26,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 429 transitions. [2024-11-23 23:57:26,930 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.449685534591195 [2024-11-23 23:57:26,930 INFO L175 Difference]: Start difference. First operand has 115 places, 120 transitions, 521 flow. Second operand 9 states and 429 transitions. [2024-11-23 23:57:26,931 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 122 places, 123 transitions, 733 flow [2024-11-23 23:57:26,933 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 123 transitions, 720 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:57:26,934 INFO L231 Difference]: Finished difference. Result has 120 places, 123 transitions, 590 flow [2024-11-23 23:57:26,934 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=504, PETRI_DIFFERENCE_MINUEND_PLACES=112, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=119, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=94, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=590, PETRI_PLACES=120, PETRI_TRANSITIONS=123} [2024-11-23 23:57:26,935 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, 18 predicate places. [2024-11-23 23:57:26,935 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 123 transitions, 590 flow [2024-11-23 23:57:26,935 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 41.92307692307692) internal successors, (545), 13 states have internal predecessors, (545), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:26,935 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:26,935 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:26,942 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-23 23:57:27,135 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-23 23:57:27,136 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:57:27,136 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:27,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1450896291, now seen corresponding path program 1 times [2024-11-23 23:57:27,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:27,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1214649887] [2024-11-23 23:57:27,136 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:27,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:27,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:27,214 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:27,214 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:27,214 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1214649887] [2024-11-23 23:57:27,214 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1214649887] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:57:27,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:57:27,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 23:57:27,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128501450] [2024-11-23 23:57:27,215 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:57:27,215 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:57:27,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:27,216 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:57:27,216 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:57:27,230 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-23 23:57:27,231 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 123 transitions, 590 flow. Second operand has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:27,231 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:27,231 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-23 23:57:27,231 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:28,635 INFO L124 PetriNetUnfolderBase]: 7241/14164 cut-off events. [2024-11-23 23:57:28,635 INFO L125 PetriNetUnfolderBase]: For 522/522 co-relation queries the response was YES. [2024-11-23 23:57:28,657 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25339 conditions, 14164 events. 7241/14164 cut-off events. For 522/522 co-relation queries the response was YES. Maximal size of possible extension queue 1052. Compared 138836 event pairs, 5536 based on Foata normal form. 96/7979 useless extension candidates. Maximal degree in co-relation 24983. Up to 9526 conditions per place. [2024-11-23 23:57:28,686 INFO L140 encePairwiseOnDemand]: 90/106 looper letters, 142 selfloop transitions, 19 changer transitions 0/190 dead transitions. [2024-11-23 23:57:28,686 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 124 places, 190 transitions, 1317 flow [2024-11-23 23:57:28,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:57:28,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:57:28,687 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 327 transitions. [2024-11-23 23:57:28,688 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6169811320754717 [2024-11-23 23:57:28,688 INFO L175 Difference]: Start difference. First operand has 120 places, 123 transitions, 590 flow. Second operand 5 states and 327 transitions. [2024-11-23 23:57:28,688 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 124 places, 190 transitions, 1317 flow [2024-11-23 23:57:28,692 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 118 places, 190 transitions, 1175 flow, removed 28 selfloop flow, removed 6 redundant places. [2024-11-23 23:57:28,694 INFO L231 Difference]: Finished difference. Result has 120 places, 139 transitions, 752 flow [2024-11-23 23:57:28,695 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=512, PETRI_DIFFERENCE_MINUEND_PLACES=114, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=3, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=104, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=752, PETRI_PLACES=120, PETRI_TRANSITIONS=139} [2024-11-23 23:57:28,695 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, 18 predicate places. [2024-11-23 23:57:28,695 INFO L471 AbstractCegarLoop]: Abstraction has has 120 places, 139 transitions, 752 flow [2024-11-23 23:57:28,695 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.0) internal successors, (184), 4 states have internal predecessors, (184), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:28,696 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:28,696 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:28,696 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-11-23 23:57:28,696 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:57:28,696 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:28,697 INFO L85 PathProgramCache]: Analyzing trace with hash 1997062552, now seen corresponding path program 1 times [2024-11-23 23:57:28,697 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:28,697 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504391888] [2024-11-23 23:57:28,697 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:28,697 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:28,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:28,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:57:28,825 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:28,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504391888] [2024-11-23 23:57:28,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1504391888] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:28,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [306748498] [2024-11-23 23:57:28,826 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:28,826 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:28,826 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:57:28,828 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:57:28,830 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 23:57:28,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:28,956 INFO L256 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 10 conjuncts are in the unsatisfiable core [2024-11-23 23:57:28,957 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:57:29,030 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:57:29,030 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:57:29,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:57:29,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [306748498] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:57:29,100 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:57:29,100 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 14 [2024-11-23 23:57:29,100 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1665218234] [2024-11-23 23:57:29,100 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:57:29,100 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2024-11-23 23:57:29,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:29,101 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2024-11-23 23:57:29,101 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2024-11-23 23:57:29,164 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-23 23:57:29,165 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 120 places, 139 transitions, 752 flow. Second operand has 14 states, 14 states have (on average 45.714285714285715) internal successors, (640), 14 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:29,165 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:29,165 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-23 23:57:29,165 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:31,336 INFO L124 PetriNetUnfolderBase]: 12486/24951 cut-off events. [2024-11-23 23:57:31,336 INFO L125 PetriNetUnfolderBase]: For 2136/2136 co-relation queries the response was YES. [2024-11-23 23:57:31,412 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48046 conditions, 24951 events. 12486/24951 cut-off events. For 2136/2136 co-relation queries the response was YES. Maximal size of possible extension queue 1689. Compared 267832 event pairs, 9330 based on Foata normal form. 2/14524 useless extension candidates. Maximal degree in co-relation 47642. Up to 10087 conditions per place. [2024-11-23 23:57:31,504 INFO L140 encePairwiseOnDemand]: 92/106 looper letters, 145 selfloop transitions, 47 changer transitions 0/221 dead transitions. [2024-11-23 23:57:31,504 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 130 places, 221 transitions, 1545 flow [2024-11-23 23:57:31,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-23 23:57:31,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-11-23 23:57:31,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 602 transitions. [2024-11-23 23:57:31,506 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.516295025728988 [2024-11-23 23:57:31,507 INFO L175 Difference]: Start difference. First operand has 120 places, 139 transitions, 752 flow. Second operand 11 states and 602 transitions. [2024-11-23 23:57:31,507 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 130 places, 221 transitions, 1545 flow [2024-11-23 23:57:31,514 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 128 places, 221 transitions, 1540 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:57:31,516 INFO L231 Difference]: Finished difference. Result has 134 places, 166 transitions, 1142 flow [2024-11-23 23:57:31,517 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=747, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=95, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=1142, PETRI_PLACES=134, PETRI_TRANSITIONS=166} [2024-11-23 23:57:31,517 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, 32 predicate places. [2024-11-23 23:57:31,517 INFO L471 AbstractCegarLoop]: Abstraction has has 134 places, 166 transitions, 1142 flow [2024-11-23 23:57:31,518 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 14 states have (on average 45.714285714285715) internal successors, (640), 14 states have internal predecessors, (640), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:31,518 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:31,518 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:31,528 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 23:57:31,718 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:31,718 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:57:31,719 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:31,719 INFO L85 PathProgramCache]: Analyzing trace with hash -2074907235, now seen corresponding path program 1 times [2024-11-23 23:57:31,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:31,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [278905462] [2024-11-23 23:57:31,720 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:31,720 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:31,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:32,096 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:32,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:32,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [278905462] [2024-11-23 23:57:32,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [278905462] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:32,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563134181] [2024-11-23 23:57:32,097 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:32,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:32,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:57:32,098 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:57:32,100 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 23:57:32,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:32,241 INFO L256 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 23 conjuncts are in the unsatisfiable core [2024-11-23 23:57:32,243 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:57:32,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 23:57:32,276 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 9 [2024-11-23 23:57:32,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:57:32,332 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-23 23:57:32,344 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:57:32,344 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 23:57:32,473 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:57:32,475 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 21 treesize of output 14 [2024-11-23 23:57:32,484 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-23 23:57:32,485 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2024-11-23 23:57:32,613 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:32,613 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:57:32,769 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-23 23:57:32,769 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 43 treesize of output 61 [2024-11-23 23:57:33,000 INFO L173 IndexEqualityManager]: detected equality via solver [2024-11-23 23:57:33,067 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 1 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 23:57:33,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563134181] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:57:33,067 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:57:33,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-23 23:57:33,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1236387112] [2024-11-23 23:57:33,068 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:57:33,068 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-23 23:57:33,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:33,069 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-23 23:57:33,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=225, Unknown=0, NotChecked=0, Total=306 [2024-11-23 23:57:34,618 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 106 [2024-11-23 23:57:34,619 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 134 places, 166 transitions, 1142 flow. Second operand has 18 states, 18 states have (on average 37.833333333333336) internal successors, (681), 18 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:34,619 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:34,619 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 106 [2024-11-23 23:57:34,619 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:37,166 INFO L124 PetriNetUnfolderBase]: 13948/26810 cut-off events. [2024-11-23 23:57:37,166 INFO L125 PetriNetUnfolderBase]: For 2416/2416 co-relation queries the response was YES. [2024-11-23 23:57:37,253 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52669 conditions, 26810 events. 13948/26810 cut-off events. For 2416/2416 co-relation queries the response was YES. Maximal size of possible extension queue 1890. Compared 282092 event pairs, 10504 based on Foata normal form. 0/15659 useless extension candidates. Maximal degree in co-relation 52566. Up to 19204 conditions per place. [2024-11-23 23:57:37,323 INFO L140 encePairwiseOnDemand]: 99/106 looper letters, 129 selfloop transitions, 25 changer transitions 0/181 dead transitions. [2024-11-23 23:57:37,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 140 places, 181 transitions, 1586 flow [2024-11-23 23:57:37,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 23:57:37,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-11-23 23:57:37,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 351 transitions. [2024-11-23 23:57:37,325 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.41391509433962265 [2024-11-23 23:57:37,325 INFO L175 Difference]: Start difference. First operand has 134 places, 166 transitions, 1142 flow. Second operand 8 states and 351 transitions. [2024-11-23 23:57:37,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 140 places, 181 transitions, 1586 flow [2024-11-23 23:57:37,337 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 139 places, 181 transitions, 1564 flow, removed 8 selfloop flow, removed 1 redundant places. [2024-11-23 23:57:37,340 INFO L231 Difference]: Finished difference. Result has 139 places, 165 transitions, 1170 flow [2024-11-23 23:57:37,340 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=1120, PETRI_DIFFERENCE_MINUEND_PLACES=132, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1170, PETRI_PLACES=139, PETRI_TRANSITIONS=165} [2024-11-23 23:57:37,340 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, 37 predicate places. [2024-11-23 23:57:37,341 INFO L471 AbstractCegarLoop]: Abstraction has has 139 places, 165 transitions, 1170 flow [2024-11-23 23:57:37,341 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 37.833333333333336) internal successors, (681), 18 states have internal predecessors, (681), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:37,341 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:37,341 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:37,351 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-23 23:57:37,542 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-23 23:57:37,542 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:57:37,542 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:37,542 INFO L85 PathProgramCache]: Analyzing trace with hash -1416434422, now seen corresponding path program 1 times [2024-11-23 23:57:37,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:37,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380281003] [2024-11-23 23:57:37,542 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:37,543 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:37,618 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:57:37,618 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:37,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380281003] [2024-11-23 23:57:37,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [380281003] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:57:37,619 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:57:37,619 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 23:57:37,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1082480221] [2024-11-23 23:57:37,619 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:57:37,619 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:57:37,619 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:37,619 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:57:37,620 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:57:37,631 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-23 23:57:37,632 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 139 places, 165 transitions, 1170 flow. Second operand has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:37,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:37,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-23 23:57:37,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:40,139 INFO L124 PetriNetUnfolderBase]: 13251/26000 cut-off events. [2024-11-23 23:57:40,139 INFO L125 PetriNetUnfolderBase]: For 2709/2709 co-relation queries the response was YES. [2024-11-23 23:57:40,199 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51403 conditions, 26000 events. 13251/26000 cut-off events. For 2709/2709 co-relation queries the response was YES. Maximal size of possible extension queue 1763. Compared 273388 event pairs, 9882 based on Foata normal form. 223/16048 useless extension candidates. Maximal degree in co-relation 51213. Up to 17608 conditions per place. [2024-11-23 23:57:40,258 INFO L140 encePairwiseOnDemand]: 89/106 looper letters, 166 selfloop transitions, 39 changer transitions 0/233 dead transitions. [2024-11-23 23:57:40,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 233 transitions, 2114 flow [2024-11-23 23:57:40,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:57:40,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:57:40,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 321 transitions. [2024-11-23 23:57:40,260 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6056603773584905 [2024-11-23 23:57:40,260 INFO L175 Difference]: Start difference. First operand has 139 places, 165 transitions, 1170 flow. Second operand 5 states and 321 transitions. [2024-11-23 23:57:40,260 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 233 transitions, 2114 flow [2024-11-23 23:57:40,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 135 places, 233 transitions, 1952 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-11-23 23:57:40,272 INFO L231 Difference]: Finished difference. Result has 137 places, 187 transitions, 1520 flow [2024-11-23 23:57:40,272 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=1084, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=165, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=126, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1520, PETRI_PLACES=137, PETRI_TRANSITIONS=187} [2024-11-23 23:57:40,272 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, 35 predicate places. [2024-11-23 23:57:40,272 INFO L471 AbstractCegarLoop]: Abstraction has has 137 places, 187 transitions, 1520 flow [2024-11-23 23:57:40,273 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 46.5) internal successors, (186), 4 states have internal predecessors, (186), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:40,273 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:40,273 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:40,273 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-11-23 23:57:40,273 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:57:40,274 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:40,274 INFO L85 PathProgramCache]: Analyzing trace with hash -1425703918, now seen corresponding path program 2 times [2024-11-23 23:57:40,274 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:40,274 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64124391] [2024-11-23 23:57:40,274 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:57:40,274 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:40,301 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:57:40,301 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:57:40,555 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:57:40,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:40,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64124391] [2024-11-23 23:57:40,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [64124391] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:40,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [735581092] [2024-11-23 23:57:40,556 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 23:57:40,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:40,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:57:40,558 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:57:40,563 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 23:57:40,762 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 23:57:40,762 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 23:57:40,764 INFO L256 TraceCheckSpWp]: Trace formula consists of 227 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-23 23:57:40,765 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:57:40,774 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2024-11-23 23:57:40,859 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 15 treesize of output 11 [2024-11-23 23:57:40,921 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 23:57:40,983 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:57:40,983 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:57:41,216 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 23:57:41,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [735581092] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:57:41,217 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:57:41,217 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 7, 7] total 20 [2024-11-23 23:57:41,217 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290485954] [2024-11-23 23:57:41,217 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:57:41,219 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2024-11-23 23:57:41,219 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:41,219 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2024-11-23 23:57:41,219 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=351, Unknown=0, NotChecked=0, Total=420 [2024-11-23 23:57:42,426 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 39 out of 106 [2024-11-23 23:57:42,427 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 137 places, 187 transitions, 1520 flow. Second operand has 21 states, 21 states have (on average 40.61904761904762) internal successors, (853), 21 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:42,427 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:42,427 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 39 of 106 [2024-11-23 23:57:42,427 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:47,405 INFO L124 PetriNetUnfolderBase]: 18751/37111 cut-off events. [2024-11-23 23:57:47,405 INFO L125 PetriNetUnfolderBase]: For 6569/6569 co-relation queries the response was YES. [2024-11-23 23:57:47,528 INFO L83 FinitePrefix]: Finished finitePrefix Result has 82852 conditions, 37111 events. 18751/37111 cut-off events. For 6569/6569 co-relation queries the response was YES. Maximal size of possible extension queue 2421. Compared 409851 event pairs, 13770 based on Foata normal form. 0/22490 useless extension candidates. Maximal degree in co-relation 82390. Up to 9892 conditions per place. [2024-11-23 23:57:47,663 INFO L140 encePairwiseOnDemand]: 91/106 looper letters, 296 selfloop transitions, 72 changer transitions 0/395 dead transitions. [2024-11-23 23:57:47,664 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 395 transitions, 3530 flow [2024-11-23 23:57:47,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2024-11-23 23:57:47,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 24 states. [2024-11-23 23:57:47,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 1157 transitions. [2024-11-23 23:57:47,667 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4547955974842767 [2024-11-23 23:57:47,668 INFO L175 Difference]: Start difference. First operand has 137 places, 187 transitions, 1520 flow. Second operand 24 states and 1157 transitions. [2024-11-23 23:57:47,668 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 395 transitions, 3530 flow [2024-11-23 23:57:47,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 159 places, 395 transitions, 3515 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-11-23 23:57:47,699 INFO L231 Difference]: Finished difference. Result has 169 places, 217 transitions, 1995 flow [2024-11-23 23:57:47,699 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=1509, PETRI_DIFFERENCE_MINUEND_PLACES=136, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=187, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=44, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=130, PETRI_DIFFERENCE_SUBTRAHEND_STATES=24, PETRI_FLOW=1995, PETRI_PLACES=169, PETRI_TRANSITIONS=217} [2024-11-23 23:57:47,699 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, 67 predicate places. [2024-11-23 23:57:47,699 INFO L471 AbstractCegarLoop]: Abstraction has has 169 places, 217 transitions, 1995 flow [2024-11-23 23:57:47,700 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 40.61904761904762) internal successors, (853), 21 states have internal predecessors, (853), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:47,700 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:47,700 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:47,709 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-23 23:57:47,901 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:47,901 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:57:47,901 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:47,901 INFO L85 PathProgramCache]: Analyzing trace with hash -33816883, now seen corresponding path program 1 times [2024-11-23 23:57:47,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:47,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1777406776] [2024-11-23 23:57:47,901 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:47,902 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:47,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:48,361 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:57:48,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:48,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1777406776] [2024-11-23 23:57:48,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1777406776] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:57:48,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:57:48,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-23 23:57:48,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [977874226] [2024-11-23 23:57:48,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:57:48,361 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-23 23:57:48,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:48,362 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-23 23:57:48,362 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-11-23 23:57:48,595 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 40 out of 106 [2024-11-23 23:57:48,595 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 217 transitions, 1995 flow. Second operand has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:48,595 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:48,595 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 40 of 106 [2024-11-23 23:57:48,595 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:51,605 INFO L124 PetriNetUnfolderBase]: 11803/23163 cut-off events. [2024-11-23 23:57:51,605 INFO L125 PetriNetUnfolderBase]: For 5614/5722 co-relation queries the response was YES. [2024-11-23 23:57:51,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51649 conditions, 23163 events. 11803/23163 cut-off events. For 5614/5722 co-relation queries the response was YES. Maximal size of possible extension queue 1493. Compared 237481 event pairs, 8918 based on Foata normal form. 0/15423 useless extension candidates. Maximal degree in co-relation 51441. Up to 16962 conditions per place. [2024-11-23 23:57:51,999 INFO L140 encePairwiseOnDemand]: 100/106 looper letters, 162 selfloop transitions, 23 changer transitions 0/213 dead transitions. [2024-11-23 23:57:51,999 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 213 transitions, 2345 flow [2024-11-23 23:57:51,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 23:57:51,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-11-23 23:57:52,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 215 transitions. [2024-11-23 23:57:52,000 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.5070754716981132 [2024-11-23 23:57:52,000 INFO L175 Difference]: Start difference. First operand has 169 places, 217 transitions, 1995 flow. Second operand 4 states and 215 transitions. [2024-11-23 23:57:52,000 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 213 transitions, 2345 flow [2024-11-23 23:57:52,014 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 157 places, 213 transitions, 2132 flow, removed 57 selfloop flow, removed 11 redundant places. [2024-11-23 23:57:52,016 INFO L231 Difference]: Finished difference. Result has 157 places, 213 transitions, 1808 flow [2024-11-23 23:57:52,016 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=1762, PETRI_DIFFERENCE_MINUEND_PLACES=154, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=213, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=23, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=1808, PETRI_PLACES=157, PETRI_TRANSITIONS=213} [2024-11-23 23:57:52,017 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, 55 predicate places. [2024-11-23 23:57:52,017 INFO L471 AbstractCegarLoop]: Abstraction has has 157 places, 213 transitions, 1808 flow [2024-11-23 23:57:52,017 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 42.0) internal successors, (252), 6 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:52,017 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:52,017 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:52,017 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-23 23:57:52,017 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:57:52,017 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:52,018 INFO L85 PathProgramCache]: Analyzing trace with hash -33816882, now seen corresponding path program 1 times [2024-11-23 23:57:52,018 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:52,018 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [589362963] [2024-11-23 23:57:52,018 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:52,018 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:52,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:52,460 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:57:52,460 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:52,460 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [589362963] [2024-11-23 23:57:52,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [589362963] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:52,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1036961309] [2024-11-23 23:57:52,461 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:52,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:52,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:57:52,463 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:57:52,467 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 23:57:52,625 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:52,627 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 22 conjuncts are in the unsatisfiable core [2024-11-23 23:57:52,629 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:57:52,632 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 6 treesize of output 5 [2024-11-23 23:57:52,650 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-23 23:57:52,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2024-11-23 23:57:52,669 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-23 23:57:52,669 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2024-11-23 23:57:52,693 INFO L349 Elim1Store]: treesize reduction 11, result has 45.0 percent of original size [2024-11-23 23:57:52,693 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 16 treesize of output 22 [2024-11-23 23:57:52,747 INFO L349 Elim1Store]: treesize reduction 24, result has 48.9 percent of original size [2024-11-23 23:57:52,747 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 3 case distinctions, treesize of input 21 treesize of output 38 [2024-11-23 23:57:52,816 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:57:52,816 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:57:52,904 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 23:57:52,904 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1036961309] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:57:52,904 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:57:52,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 5] total 6 [2024-11-23 23:57:52,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630812013] [2024-11-23 23:57:52,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:57:52,905 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 23:57:52,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:52,906 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 23:57:52,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-11-23 23:57:53,081 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 35 out of 106 [2024-11-23 23:57:53,081 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 157 places, 213 transitions, 1808 flow. Second operand has 8 states, 8 states have (on average 37.625) internal successors, (301), 8 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:53,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:57:53,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 35 of 106 [2024-11-23 23:57:53,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:57:56,573 INFO L124 PetriNetUnfolderBase]: 12605/23323 cut-off events. [2024-11-23 23:57:56,573 INFO L125 PetriNetUnfolderBase]: For 5590/5590 co-relation queries the response was YES. [2024-11-23 23:57:56,646 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52268 conditions, 23323 events. 12605/23323 cut-off events. For 5590/5590 co-relation queries the response was YES. Maximal size of possible extension queue 1484. Compared 227254 event pairs, 9973 based on Foata normal form. 0/17133 useless extension candidates. Maximal degree in co-relation 52094. Up to 18046 conditions per place. [2024-11-23 23:57:56,698 INFO L140 encePairwiseOnDemand]: 97/106 looper letters, 130 selfloop transitions, 56 changer transitions 0/209 dead transitions. [2024-11-23 23:57:56,698 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 209 transitions, 2168 flow [2024-11-23 23:57:56,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-23 23:57:56,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-11-23 23:57:56,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 231 transitions. [2024-11-23 23:57:56,699 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.4358490566037736 [2024-11-23 23:57:56,699 INFO L175 Difference]: Start difference. First operand has 157 places, 213 transitions, 1808 flow. Second operand 5 states and 231 transitions. [2024-11-23 23:57:56,699 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 209 transitions, 2168 flow [2024-11-23 23:57:56,716 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 155 places, 209 transitions, 2138 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-23 23:57:56,718 INFO L231 Difference]: Finished difference. Result has 155 places, 209 transitions, 1878 flow [2024-11-23 23:57:56,718 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=1766, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=209, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=153, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1878, PETRI_PLACES=155, PETRI_TRANSITIONS=209} [2024-11-23 23:57:56,719 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, 53 predicate places. [2024-11-23 23:57:56,719 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 209 transitions, 1878 flow [2024-11-23 23:57:56,719 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 37.625) internal successors, (301), 8 states have internal predecessors, (301), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:57:56,719 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:57:56,719 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:57:56,726 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-23 23:57:56,919 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2024-11-23 23:57:56,920 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting thread1Err3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:57:56,920 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:57:56,920 INFO L85 PathProgramCache]: Analyzing trace with hash -33816881, now seen corresponding path program 1 times [2024-11-23 23:57:56,920 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:57:56,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864605219] [2024-11-23 23:57:56,920 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:56,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:57:56,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:57,442 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:57:57,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:57:57,442 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864605219] [2024-11-23 23:57:57,442 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864605219] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:57:57,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [291484126] [2024-11-23 23:57:57,443 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:57:57,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:57:57,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:57:57,445 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:57:57,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 23:57:57,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:57:57,599 INFO L256 TraceCheckSpWp]: Trace formula consists of 259 conjuncts, 36 conjuncts are in the unsatisfiable core [2024-11-23 23:57:57,601 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:57:57,610 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2024-11-23 23:57:57,677 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:57:57,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-23 23:57:57,697 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-23 23:57:57,697 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2024-11-23 23:57:57,738 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-23 23:57:57,739 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 17 treesize of output 21 [2024-11-23 23:57:57,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-23 23:57:57,818 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:57:57,819 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-23 23:57:57,853 INFO L349 Elim1Store]: treesize reduction 40, result has 32.2 percent of original size [2024-11-23 23:57:57,853 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 4 case distinctions, treesize of input 24 treesize of output 28 [2024-11-23 23:57:57,898 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 23:57:57,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 2 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 13 [2024-11-23 23:57:57,915 INFO L349 Elim1Store]: treesize reduction 8, result has 52.9 percent of original size [2024-11-23 23:57:57,915 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 1 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 16 treesize of output 18 [2024-11-23 23:57:57,944 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 6 proven. 3 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:57:57,944 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:57:58,483 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 375 treesize of output 369 [2024-11-23 23:57:58,905 INFO L134 CoverageAnalysis]: Checked inductivity of 11 backedges. 4 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:57:58,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [291484126] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:57:58,905 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:57:58,905 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 5] total 17 [2024-11-23 23:57:58,905 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [10606243] [2024-11-23 23:57:58,905 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:57:58,906 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-23 23:57:58,906 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:57:58,906 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-23 23:57:58,906 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=271, Unknown=0, NotChecked=0, Total=342 [2024-11-23 23:58:00,733 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 36 out of 106 [2024-11-23 23:58:00,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 209 transitions, 1878 flow. Second operand has 19 states, 19 states have (on average 37.89473684210526) internal successors, (720), 19 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:58:00,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:58:00,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 36 of 106 [2024-11-23 23:58:00,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:58:06,273 INFO L124 PetriNetUnfolderBase]: 19679/36683 cut-off events. [2024-11-23 23:58:06,273 INFO L125 PetriNetUnfolderBase]: For 10158/10158 co-relation queries the response was YES. [2024-11-23 23:58:06,424 INFO L83 FinitePrefix]: Finished finitePrefix Result has 80124 conditions, 36683 events. 19679/36683 cut-off events. For 10158/10158 co-relation queries the response was YES. Maximal size of possible extension queue 2326. Compared 381735 event pairs, 15744 based on Foata normal form. 0/28196 useless extension candidates. Maximal degree in co-relation 79876. Up to 14767 conditions per place. [2024-11-23 23:58:06,545 INFO L140 encePairwiseOnDemand]: 92/106 looper letters, 155 selfloop transitions, 199 changer transitions 0/378 dead transitions. [2024-11-23 23:58:06,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 168 places, 378 transitions, 3914 flow [2024-11-23 23:58:06,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 23:58:06,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-11-23 23:58:06,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 678 transitions. [2024-11-23 23:58:06,547 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.42641509433962266 [2024-11-23 23:58:06,547 INFO L175 Difference]: Start difference. First operand has 155 places, 209 transitions, 1878 flow. Second operand 15 states and 678 transitions. [2024-11-23 23:58:06,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 168 places, 378 transitions, 3914 flow [2024-11-23 23:58:06,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 378 transitions, 3734 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-11-23 23:58:06,581 INFO L231 Difference]: Finished difference. Result has 164 places, 299 transitions, 3065 flow [2024-11-23 23:58:06,581 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=1760, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=91, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=3065, PETRI_PLACES=164, PETRI_TRANSITIONS=299} [2024-11-23 23:58:06,582 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, 62 predicate places. [2024-11-23 23:58:06,582 INFO L471 AbstractCegarLoop]: Abstraction has has 164 places, 299 transitions, 3065 flow [2024-11-23 23:58:06,582 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 37.89473684210526) internal successors, (720), 19 states have internal predecessors, (720), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:58:06,582 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:58:06,582 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:58:06,588 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2024-11-23 23:58:06,783 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_4f3937ce-008c-40e3-b9d2-7e80bebb35f0/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2024-11-23 23:58:06,783 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting thread2Err5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:58:06,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:58:06,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1055172344, now seen corresponding path program 1 times [2024-11-23 23:58:06,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:58:06,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565505298] [2024-11-23 23:58:06,783 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:58:06,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:58:06,803 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:58:06,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:58:06,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:58:06,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565505298] [2024-11-23 23:58:06,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [565505298] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:58:06,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:58:06,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-23 23:58:06,863 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639825914] [2024-11-23 23:58:06,863 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:58:06,864 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 23:58:06,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:58:06,864 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 23:58:06,864 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 23:58:06,870 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-23 23:58:06,870 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 164 places, 299 transitions, 3065 flow. Second operand has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:58:06,870 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:58:06,870 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-23 23:58:06,870 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-23 23:58:11,785 INFO L124 PetriNetUnfolderBase]: 21135/33707 cut-off events. [2024-11-23 23:58:11,785 INFO L125 PetriNetUnfolderBase]: For 9216/9248 co-relation queries the response was YES. [2024-11-23 23:58:11,891 INFO L83 FinitePrefix]: Finished finitePrefix Result has 79153 conditions, 33707 events. 21135/33707 cut-off events. For 9216/9248 co-relation queries the response was YES. Maximal size of possible extension queue 1954. Compared 278283 event pairs, 5922 based on Foata normal form. 318/25036 useless extension candidates. Maximal degree in co-relation 78905. Up to 24109 conditions per place. [2024-11-23 23:58:11,970 INFO L140 encePairwiseOnDemand]: 100/106 looper letters, 292 selfloop transitions, 2 changer transitions 0/319 dead transitions. [2024-11-23 23:58:11,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 319 transitions, 3706 flow [2024-11-23 23:58:11,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 23:58:11,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-23 23:58:11,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 205 transitions. [2024-11-23 23:58:11,972 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6446540880503144 [2024-11-23 23:58:11,972 INFO L175 Difference]: Start difference. First operand has 164 places, 299 transitions, 3065 flow. Second operand 3 states and 205 transitions. [2024-11-23 23:58:11,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 319 transitions, 3706 flow [2024-11-23 23:58:11,989 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 319 transitions, 3644 flow, removed 29 selfloop flow, removed 2 redundant places. [2024-11-23 23:58:11,992 INFO L231 Difference]: Finished difference. Result has 165 places, 300 transitions, 3025 flow [2024-11-23 23:58:11,992 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=106, PETRI_DIFFERENCE_MINUEND_FLOW=3003, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=299, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=3025, PETRI_PLACES=165, PETRI_TRANSITIONS=300} [2024-11-23 23:58:11,992 INFO L279 CegarLoopForPetriNet]: 102 programPoint places, 63 predicate places. [2024-11-23 23:58:11,992 INFO L471 AbstractCegarLoop]: Abstraction has has 165 places, 300 transitions, 3025 flow [2024-11-23 23:58:11,992 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 48.0) internal successors, (144), 3 states have internal predecessors, (144), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:58:11,992 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-23 23:58:11,992 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:58:11,992 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-11-23 23:58:11,993 INFO L396 AbstractCegarLoop]: === Iteration 24 === Targeting thread3Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 78 more)] === [2024-11-23 23:58:11,993 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:58:11,993 INFO L85 PathProgramCache]: Analyzing trace with hash 791095632, now seen corresponding path program 1 times [2024-11-23 23:58:11,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:58:11,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1237402852] [2024-11-23 23:58:11,993 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:58:11,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:58:12,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:58:12,059 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 6 trivial. 0 not checked. [2024-11-23 23:58:12,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:58:12,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1237402852] [2024-11-23 23:58:12,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1237402852] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 23:58:12,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 23:58:12,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 23:58:12,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775957080] [2024-11-23 23:58:12,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 23:58:12,060 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 23:58:12,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:58:12,060 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 23:58:12,060 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 23:58:12,063 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 44 out of 106 [2024-11-23 23:58:12,063 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 300 transitions, 3025 flow. Second operand has 4 states, 4 states have (on average 47.5) internal successors, (190), 4 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:58:12,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-23 23:58:12,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 44 of 106 [2024-11-23 23:58:12,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand