./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version d790fecc Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB --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 47976145f2a7f206dd7d2e7a0ffeac879f94f33f7a5b87161ebd997173567eb0 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:26:34,302 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:26:34,391 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-27 23:26:34,402 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:26:34,402 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:26:34,449 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:26:34,450 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:26:34,450 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:26:34,450 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:26:34,450 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:26:34,451 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:26:34,451 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:26:34,451 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:26:34,452 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:26:34,452 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:26:34,453 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:26:34,453 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 23:26:34,454 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:26:34,454 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 23:26:34,454 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:26:34,454 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 23:26:34,454 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 23:26:34,454 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 23:26:34,454 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:26:34,455 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 23:26:34,455 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 23:26:34,455 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 23:26:34,455 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:26:34,455 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:26:34,455 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:26:34,456 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:26:34,456 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:26:34,457 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:26:34,457 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:26:34,457 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:26:34,457 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:26:34,457 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:26:34,457 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:26:34,457 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:26:34,458 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:26:34,458 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:26:34,458 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 23:26:34,458 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 23:26:34,458 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:26:34,459 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:26:34,459 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:26:34,459 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:26:34,459 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_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB 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 -> 47976145f2a7f206dd7d2e7a0ffeac879f94f33f7a5b87161ebd997173567eb0 [2024-11-27 23:26:34,821 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:26:34,832 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:26:34,839 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:26:34,842 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:26:34,843 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:26:34,844 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c [2024-11-27 23:26:37,976 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/data/aa932bcf6/e3d5dfc4ba7f469ba4aeb52637d94314/FLAG2c4aa8df0 [2024-11-27 23:26:38,408 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:26:38,409 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/sv-benchmarks/c/weaver/chl-nzb-file-subst.wvr.c [2024-11-27 23:26:38,424 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/data/aa932bcf6/e3d5dfc4ba7f469ba4aeb52637d94314/FLAG2c4aa8df0 [2024-11-27 23:26:38,456 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/data/aa932bcf6/e3d5dfc4ba7f469ba4aeb52637d94314 [2024-11-27 23:26:38,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:26:38,461 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:26:38,462 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:26:38,462 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:26:38,468 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:26:38,469 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:26:38" (1/1) ... [2024-11-27 23:26:38,470 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@68517ff5 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:38, skipping insertion in model container [2024-11-27 23:26:38,471 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:26:38" (1/1) ... [2024-11-27 23:26:38,503 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:26:38,844 WARN L1063 CHandler]: saw a pointer cast to a type that we could not get a type size for, not adapting memory model [2024-11-27 23:26:38,849 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:26:38,860 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:26:38,919 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:26:38,941 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:26:38,941 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:38 WrapperNode [2024-11-27 23:26:38,941 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:26:38,942 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:26:38,943 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:26:38,943 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:26:38,951 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:38" (1/1) ... [2024-11-27 23:26:38,969 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:38" (1/1) ... [2024-11-27 23:26:39,055 INFO L138 Inliner]: procedures = 25, calls = 62, calls flagged for inlining = 29, calls inlined = 43, statements flattened = 599 [2024-11-27 23:26:39,055 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:26:39,056 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:26:39,056 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:26:39,056 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:26:39,068 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:38" (1/1) ... [2024-11-27 23:26:39,068 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:38" (1/1) ... [2024-11-27 23:26:39,080 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:38" (1/1) ... [2024-11-27 23:26:39,130 INFO L175 MemorySlicer]: Split 29 memory accesses to 2 slices as follows [2, 27]. 93 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0]. The 3 writes are split as follows [0, 3]. [2024-11-27 23:26:39,130 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:38" (1/1) ... [2024-11-27 23:26:39,130 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:38" (1/1) ... [2024-11-27 23:26:39,160 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:38" (1/1) ... [2024-11-27 23:26:39,165 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:38" (1/1) ... [2024-11-27 23:26:39,179 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:38" (1/1) ... [2024-11-27 23:26:39,185 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:38" (1/1) ... [2024-11-27 23:26:39,192 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:38" (1/1) ... [2024-11-27 23:26:39,203 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:26:39,204 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:26:39,205 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:26:39,205 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:26:39,209 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:38" (1/1) ... [2024-11-27 23:26:39,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:26:39,234 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:26:39,253 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:26:39,258 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:26:39,297 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 23:26:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2024-11-27 23:26:39,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2024-11-27 23:26:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2024-11-27 23:26:39,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2024-11-27 23:26:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure thread3 [2024-11-27 23:26:39,298 INFO L138 BoogieDeclarations]: Found implementation of procedure thread3 [2024-11-27 23:26:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 23:26:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 23:26:39,298 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 23:26:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 23:26:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 23:26:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:26:39,299 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:26:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 23:26:39,299 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 23:26:39,301 WARN L203 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement. [2024-11-27 23:26:39,532 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:26:39,534 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:26:41,011 INFO L279 CfgBuilder]: Omitted future-live optimization because the input is a concurrent program. [2024-11-27 23:26:41,011 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:26:42,340 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:26:42,342 INFO L312 CfgBuilder]: Removed 6 assume(true) statements. [2024-11-27 23:26:42,343 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:26:42 BoogieIcfgContainer [2024-11-27 23:26:42,343 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:26:42,348 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:26:42,348 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:26:42,355 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:26:42,355 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:26:38" (1/3) ... [2024-11-27 23:26:42,356 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9152cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:26:42, skipping insertion in model container [2024-11-27 23:26:42,356 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:26:38" (2/3) ... [2024-11-27 23:26:42,356 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@a9152cd and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:26:42, skipping insertion in model container [2024-11-27 23:26:42,357 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:26:42" (3/3) ... [2024-11-27 23:26:42,359 INFO L128 eAbstractionObserver]: Analyzing ICFG chl-nzb-file-subst.wvr.c [2024-11-27 23:26:42,380 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:26:42,382 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG chl-nzb-file-subst.wvr.c that has 4 procedures, 157 locations, 1 initial locations, 6 loop locations, and 56 error locations. [2024-11-27 23:26:42,382 INFO L491 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-11-27 23:26:42,626 INFO L143 ThreadInstanceAdder]: Constructed 3 joinOtherThreadTransitions. [2024-11-27 23:26:42,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 166 places, 186 transitions, 393 flow [2024-11-27 23:26:42,771 INFO L124 PetriNetUnfolderBase]: 30/183 cut-off events. [2024-11-27 23:26:42,773 INFO L125 PetriNetUnfolderBase]: For 3/3 co-relation queries the response was YES. [2024-11-27 23:26:42,782 INFO L83 FinitePrefix]: Finished finitePrefix Result has 196 conditions, 183 events. 30/183 cut-off events. For 3/3 co-relation queries the response was YES. Maximal size of possible extension queue 11. Compared 702 event pairs, 0 based on Foata normal form. 0/97 useless extension candidates. Maximal degree in co-relation 162. Up to 2 conditions per place. [2024-11-27 23:26:42,782 INFO L82 GeneralOperation]: Start removeDead. Operand has 166 places, 186 transitions, 393 flow [2024-11-27 23:26:42,792 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 162 places, 182 transitions, 382 flow [2024-11-27 23:26:42,802 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:26:42,819 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;@1a34cb7a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:26:42,820 INFO L334 AbstractCegarLoop]: Starting to check reachability of 107 error locations. [2024-11-27 23:26:42,830 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-11-27 23:26:42,830 INFO L124 PetriNetUnfolderBase]: 1/4 cut-off events. [2024-11-27 23:26:42,830 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-11-27 23:26:42,830 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:26:42,831 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 23:26:42,832 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-27 23:26:42,838 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:26:42,838 INFO L85 PathProgramCache]: Analyzing trace with hash 1898915, now seen corresponding path program 1 times [2024-11-27 23:26:42,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:26:42,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830684274] [2024-11-27 23:26:42,849 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:26:42,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:26:43,021 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:26:43,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:26:43,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:26:43,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830684274] [2024-11-27 23:26:43,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830684274] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:26:43,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:26:43,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-11-27 23:26:43,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39398592] [2024-11-27 23:26:43,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:26:43,377 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:26:43,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:26:43,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:26:43,408 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:26:43,492 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2024-11-27 23:26:43,497 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 182 transitions, 382 flow. Second operand has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:26:43,497 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:26:43,498 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2024-11-27 23:26:43,500 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:26:52,705 INFO L124 PetriNetUnfolderBase]: 49592/89310 cut-off events. [2024-11-27 23:26:52,705 INFO L125 PetriNetUnfolderBase]: For 1203/1203 co-relation queries the response was YES. [2024-11-27 23:26:52,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153743 conditions, 89310 events. 49592/89310 cut-off events. For 1203/1203 co-relation queries the response was YES. Maximal size of possible extension queue 2270. Compared 853061 event pairs, 29501 based on Foata normal form. 1/71582 useless extension candidates. Maximal degree in co-relation 150436. Up to 63484 conditions per place. [2024-11-27 23:26:53,314 INFO L140 encePairwiseOnDemand]: 177/186 looper letters, 84 selfloop transitions, 2 changer transitions 0/174 dead transitions. [2024-11-27 23:26:53,314 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 159 places, 174 transitions, 538 flow [2024-11-27 23:26:53,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:26:53,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 23:26:53,491 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 369 transitions. [2024-11-27 23:26:53,494 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6612903225806451 [2024-11-27 23:26:53,496 INFO L175 Difference]: Start difference. First operand has 162 places, 182 transitions, 382 flow. Second operand 3 states and 369 transitions. [2024-11-27 23:26:53,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 159 places, 174 transitions, 538 flow [2024-11-27 23:26:53,524 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 174 transitions, 526 flow, removed 0 selfloop flow, removed 6 redundant places. [2024-11-27 23:26:53,530 INFO L231 Difference]: Finished difference. Result has 153 places, 174 transitions, 358 flow [2024-11-27 23:26:53,532 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=172, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=358, PETRI_PLACES=153, PETRI_TRANSITIONS=174} [2024-11-27 23:26:53,536 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, -9 predicate places. [2024-11-27 23:26:53,538 INFO L471 AbstractCegarLoop]: Abstraction has has 153 places, 174 transitions, 358 flow [2024-11-27 23:26:53,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 93.0) internal successors, (279), 3 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:26:53,539 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:26:53,539 INFO L206 CegarLoopForPetriNet]: trace histogram [1, 1, 1] [2024-11-27 23:26:53,539 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 23:26:53,539 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-27 23:26:53,540 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:26:53,541 INFO L85 PathProgramCache]: Analyzing trace with hash 1898916, now seen corresponding path program 1 times [2024-11-27 23:26:53,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:26:53,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1465479906] [2024-11-27 23:26:53,541 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:26:53,541 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:26:53,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:26:53,914 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:26:53,914 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:26:53,915 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1465479906] [2024-11-27 23:26:53,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1465479906] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:26:53,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:26:53,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:26:53,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483999745] [2024-11-27 23:26:53,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:26:53,917 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:26:53,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:26:53,918 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:26:53,918 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-27 23:26:54,072 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2024-11-27 23:26:54,073 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 153 places, 174 transitions, 358 flow. Second operand has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 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) [2024-11-27 23:26:54,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:26:54,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2024-11-27 23:26:54,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:27:01,500 INFO L124 PetriNetUnfolderBase]: 49595/89319 cut-off events. [2024-11-27 23:27:01,500 INFO L125 PetriNetUnfolderBase]: For 297/297 co-relation queries the response was YES. [2024-11-27 23:27:01,603 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153141 conditions, 89319 events. 49595/89319 cut-off events. For 297/297 co-relation queries the response was YES. Maximal size of possible extension queue 2270. Compared 853156 event pairs, 29501 based on Foata normal form. 0/71586 useless extension candidates. Maximal degree in co-relation 153091. Up to 63497 conditions per place. [2024-11-27 23:27:01,962 INFO L140 encePairwiseOnDemand]: 176/186 looper letters, 91 selfloop transitions, 7 changer transitions 0/183 dead transitions. [2024-11-27 23:27:01,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 155 places, 183 transitions, 574 flow [2024-11-27 23:27:01,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:27:01,963 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-11-27 23:27:01,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 377 transitions. [2024-11-27 23:27:01,969 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6756272401433692 [2024-11-27 23:27:01,969 INFO L175 Difference]: Start difference. First operand has 153 places, 174 transitions, 358 flow. Second operand 3 states and 377 transitions. [2024-11-27 23:27:01,969 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 155 places, 183 transitions, 574 flow [2024-11-27 23:27:01,970 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 183 transitions, 568 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 23:27:01,977 INFO L231 Difference]: Finished difference. Result has 155 places, 180 transitions, 412 flow [2024-11-27 23:27:01,978 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=354, PETRI_DIFFERENCE_MINUEND_PLACES=151, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=174, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=412, PETRI_PLACES=155, PETRI_TRANSITIONS=180} [2024-11-27 23:27:01,979 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, -7 predicate places. [2024-11-27 23:27:01,979 INFO L471 AbstractCegarLoop]: Abstraction has has 155 places, 180 transitions, 412 flow [2024-11-27 23:27:01,979 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 92.75) internal successors, (371), 4 states have internal predecessors, (371), 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) [2024-11-27 23:27:01,979 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:27:01,980 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 1, 1, 1] [2024-11-27 23:27:01,980 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 23:27:01,981 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-27 23:27:01,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:27:01,983 INFO L85 PathProgramCache]: Analyzing trace with hash 1824919760, now seen corresponding path program 1 times [2024-11-27 23:27:01,983 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:27:01,983 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632756775] [2024-11-27 23:27:01,983 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:27:01,984 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:27:02,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:27:02,420 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:27:02,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:27:02,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632756775] [2024-11-27 23:27:02,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632756775] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:27:02,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524459051] [2024-11-27 23:27:02,421 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:27:02,421 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:02,421 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:27:02,425 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:27:02,428 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 23:27:02,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:27:02,565 INFO L256 TraceCheckSpWp]: Trace formula consists of 106 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-27 23:27:02,569 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:27:02,633 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 [2024-11-27 23:27:02,704 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:27:02,704 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:27:02,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:27:02,796 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1524459051] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:27:02,796 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:27:02,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 2, 2] total 7 [2024-11-27 23:27:02,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768241363] [2024-11-27 23:27:02,797 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:27:02,797 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-27 23:27:02,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:27:02,798 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-27 23:27:02,798 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-11-27 23:27:03,491 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2024-11-27 23:27:03,492 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 155 places, 180 transitions, 412 flow. Second operand has 9 states, 9 states have (on average 93.66666666666667) internal successors, (843), 9 states have internal predecessors, (843), 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) [2024-11-27 23:27:03,493 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:27:03,493 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2024-11-27 23:27:03,493 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:27:11,321 INFO L124 PetriNetUnfolderBase]: 49598/89340 cut-off events. [2024-11-27 23:27:11,322 INFO L125 PetriNetUnfolderBase]: For 300/300 co-relation queries the response was YES. [2024-11-27 23:27:11,449 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153219 conditions, 89340 events. 49598/89340 cut-off events. For 300/300 co-relation queries the response was YES. Maximal size of possible extension queue 2274. Compared 853734 event pairs, 29501 based on Foata normal form. 6/71617 useless extension candidates. Maximal degree in co-relation 153123. Up to 63498 conditions per place. [2024-11-27 23:27:11,749 INFO L140 encePairwiseOnDemand]: 176/186 looper letters, 98 selfloop transitions, 21 changer transitions 0/204 dead transitions. [2024-11-27 23:27:11,749 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 204 transitions, 728 flow [2024-11-27 23:27:11,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:27:11,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-11-27 23:27:11,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 686 transitions. [2024-11-27 23:27:11,752 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.6146953405017921 [2024-11-27 23:27:11,752 INFO L175 Difference]: Start difference. First operand has 155 places, 180 transitions, 412 flow. Second operand 6 states and 686 transitions. [2024-11-27 23:27:11,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 204 transitions, 728 flow [2024-11-27 23:27:11,754 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 204 transitions, 708 flow, removed 0 selfloop flow, removed 2 redundant places. [2024-11-27 23:27:11,758 INFO L231 Difference]: Finished difference. Result has 161 places, 192 transitions, 538 flow [2024-11-27 23:27:11,758 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=386, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=167, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=538, PETRI_PLACES=161, PETRI_TRANSITIONS=192} [2024-11-27 23:27:11,759 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, -1 predicate places. [2024-11-27 23:27:11,759 INFO L471 AbstractCegarLoop]: Abstraction has has 161 places, 192 transitions, 538 flow [2024-11-27 23:27:11,760 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 93.66666666666667) internal successors, (843), 9 states have internal predecessors, (843), 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) [2024-11-27 23:27:11,760 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:27:11,760 INFO L206 CegarLoopForPetriNet]: trace histogram [5, 4, 1, 1] [2024-11-27 23:27:11,771 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2024-11-27 23:27:11,965 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:11,965 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-27 23:27:11,965 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:27:11,966 INFO L85 PathProgramCache]: Analyzing trace with hash -620383148, now seen corresponding path program 2 times [2024-11-27 23:27:11,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:27:11,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935813098] [2024-11-27 23:27:11,966 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:27:11,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:27:12,022 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:27:12,022 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:12,745 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 9 proven. 11 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:27:12,746 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:27:12,746 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935813098] [2024-11-27 23:27:12,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [935813098] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:27:12,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1149761643] [2024-11-27 23:27:12,747 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:27:12,748 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:12,748 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:27:12,751 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:27:12,756 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 23:27:12,887 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:27:12,887 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:27:12,889 INFO L256 TraceCheckSpWp]: Trace formula consists of 142 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-27 23:27:12,892 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:27:12,918 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 [2024-11-27 23:27:13,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:27:13,115 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:27:13,327 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:27:13,327 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1149761643] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:27:13,327 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:27:13,327 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 16 [2024-11-27 23:27:13,327 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667564891] [2024-11-27 23:27:13,328 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:27:13,328 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 23:27:13,328 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:27:13,329 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 23:27:13,330 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2024-11-27 23:27:15,314 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 92 out of 186 [2024-11-27 23:27:15,317 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 161 places, 192 transitions, 538 flow. Second operand has 18 states, 18 states have (on average 93.83333333333333) internal successors, (1689), 18 states have internal predecessors, (1689), 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) [2024-11-27 23:27:15,317 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:27:15,317 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 92 of 186 [2024-11-27 23:27:15,317 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-11-27 23:27:23,767 INFO L124 PetriNetUnfolderBase]: 49601/89346 cut-off events. [2024-11-27 23:27:23,767 INFO L125 PetriNetUnfolderBase]: For 369/369 co-relation queries the response was YES. [2024-11-27 23:27:23,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 153273 conditions, 89346 events. 49601/89346 cut-off events. For 369/369 co-relation queries the response was YES. Maximal size of possible extension queue 2274. Compared 853641 event pairs, 29501 based on Foata normal form. 6/71626 useless extension candidates. Maximal degree in co-relation 153155. Up to 63487 conditions per place. [2024-11-27 23:27:24,226 INFO L140 encePairwiseOnDemand]: 173/186 looper letters, 91 selfloop transitions, 34 changer transitions 0/210 dead transitions. [2024-11-27 23:27:24,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 210 transitions, 824 flow [2024-11-27 23:27:24,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 23:27:24,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-11-27 23:27:24,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 959 transitions. [2024-11-27 23:27:24,230 INFO L514 CegarLoopForPetriNet]: DFA transition density 0.572879330943847 [2024-11-27 23:27:24,230 INFO L175 Difference]: Start difference. First operand has 161 places, 192 transitions, 538 flow. Second operand 9 states and 959 transitions. [2024-11-27 23:27:24,230 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 210 transitions, 824 flow [2024-11-27 23:27:24,232 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 161 places, 210 transitions, 738 flow, removed 19 selfloop flow, removed 5 redundant places. [2024-11-27 23:27:24,236 INFO L231 Difference]: Finished difference. Result has 162 places, 198 transitions, 550 flow [2024-11-27 23:27:24,236 INFO L262 CegarLoopForPetriNet]: {PETRI_ALPHABET=186, PETRI_DIFFERENCE_MINUEND_FLOW=434, PETRI_DIFFERENCE_MINUEND_PLACES=153, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=189, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=550, PETRI_PLACES=162, PETRI_TRANSITIONS=198} [2024-11-27 23:27:24,237 INFO L279 CegarLoopForPetriNet]: 162 programPoint places, 0 predicate places. [2024-11-27 23:27:24,237 INFO L471 AbstractCegarLoop]: Abstraction has has 162 places, 198 transitions, 550 flow [2024-11-27 23:27:24,238 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 93.83333333333333) internal successors, (1689), 18 states have internal predecessors, (1689), 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) [2024-11-27 23:27:24,238 INFO L198 CegarLoopForPetriNet]: Found error trace [2024-11-27 23:27:24,238 INFO L206 CegarLoopForPetriNet]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:27:24,248 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-27 23:27:24,443 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:24,443 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [thread1Err0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, thread1Err2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 104 more)] === [2024-11-27 23:27:24,443 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:27:24,443 INFO L85 PathProgramCache]: Analyzing trace with hash 86001905, now seen corresponding path program 1 times [2024-11-27 23:27:24,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:27:24,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608840629] [2024-11-27 23:27:24,444 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:27:24,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:27:24,489 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:27:24,679 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-27 23:27:24,681 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:27:24,681 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608840629] [2024-11-27 23:27:24,681 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608840629] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:27:24,682 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292183902] [2024-11-27 23:27:24,682 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:27:24,682 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:27:24,682 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:27:24,684 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:27:24,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e4d161bc-e080-4b68-b521-bd7caaf5b517/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 23:27:24,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:27:24,837 INFO L256 TraceCheckSpWp]: Trace formula consists of 249 conjuncts, 6 conjuncts are in the unsatisfiable core [2024-11-27 23:27:24,838 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:27:24,895 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-27 23:27:24,897 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:27:24,935 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2024-11-27 23:27:24,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1292183902] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-27 23:27:24,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-27 23:27:24,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 9 [2024-11-27 23:27:24,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489905262] [2024-11-27 23:27:24,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-27 23:27:24,937 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:27:24,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:27:24,938 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:27:24,938 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=46, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:27:24,974 INFO L469 CegarLoopForPetriNet]: Number of universal loopers: 95 out of 186 [2024-11-27 23:27:24,975 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 162 places, 198 transitions, 550 flow. Second operand has 10 states, 10 states have (on average 97.9) internal successors, (979), 10 states have internal predecessors, (979), 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) [2024-11-27 23:27:24,975 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-11-27 23:27:24,975 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 95 of 186 [2024-11-27 23:27:24,975 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand