./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/list-simple/sll2c_append_unequal.i --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_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/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_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/list-simple/sll2c_append_unequal.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/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_f8db6d74-4f68-436d-8a3b-cdce625d8922/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 d83e632829c1e193271bd76b90e08187eb94c70000e5f11d7aea101b3ec9a9e6 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-d790fec [2024-11-27 23:22:41,299 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-27 23:22:41,406 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-27 23:22:41,413 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-27 23:22:41,414 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-27 23:22:41,445 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-27 23:22:41,446 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-27 23:22:41,446 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-27 23:22:41,447 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-27 23:22:41,447 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-27 23:22:41,447 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-27 23:22:41,447 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-27 23:22:41,448 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-27 23:22:41,448 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-27 23:22:41,448 INFO L153 SettingsManager]: * Use SBE=true [2024-11-27 23:22:41,448 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-27 23:22:41,448 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-27 23:22:41,449 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-27 23:22:41,449 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-27 23:22:41,449 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-27 23:22:41,449 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-27 23:22:41,449 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-27 23:22:41,449 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-27 23:22:41,450 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-27 23:22:41,450 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-27 23:22:41,450 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-27 23:22:41,450 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-27 23:22:41,450 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-27 23:22:41,450 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-27 23:22:41,450 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-27 23:22:41,451 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:22:41,451 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:22:41,451 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:22:41,451 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:22:41,451 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-27 23:22:41,451 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-27 23:22:41,451 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-27 23:22:41,452 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-27 23:22:41,452 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:22:41,452 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-27 23:22:41,452 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-27 23:22:41,452 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-27 23:22:41,452 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-27 23:22:41,452 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-27 23:22:41,453 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-27 23:22:41,453 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-27 23:22:41,453 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-27 23:22:41,453 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_f8db6d74-4f68-436d-8a3b-cdce625d8922/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 -> d83e632829c1e193271bd76b90e08187eb94c70000e5f11d7aea101b3ec9a9e6 [2024-11-27 23:22:41,831 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-27 23:22:41,849 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-27 23:22:41,854 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-27 23:22:41,857 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-27 23:22:41,858 INFO L274 PluginConnector]: CDTParser initialized [2024-11-27 23:22:41,860 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/../../sv-benchmarks/c/list-simple/sll2c_append_unequal.i [2024-11-27 23:22:45,723 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/data/7e2781a30/accc035afa6741118c20584954fad4d2/FLAG472b2c01d [2024-11-27 23:22:46,331 INFO L384 CDTParser]: Found 1 translation units. [2024-11-27 23:22:46,332 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/sv-benchmarks/c/list-simple/sll2c_append_unequal.i [2024-11-27 23:22:46,357 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/data/7e2781a30/accc035afa6741118c20584954fad4d2/FLAG472b2c01d [2024-11-27 23:22:46,386 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/data/7e2781a30/accc035afa6741118c20584954fad4d2 [2024-11-27 23:22:46,393 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-27 23:22:46,395 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-27 23:22:46,397 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-27 23:22:46,400 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-27 23:22:46,406 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-27 23:22:46,408 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:22:46" (1/1) ... [2024-11-27 23:22:46,411 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2d53ed1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:46, skipping insertion in model container [2024-11-27 23:22:46,414 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 27.11 11:22:46" (1/1) ... [2024-11-27 23:22:46,454 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-27 23:22:46,945 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:22:46,961 INFO L200 MainTranslator]: Completed pre-run [2024-11-27 23:22:47,062 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-27 23:22:47,100 INFO L204 MainTranslator]: Completed translation [2024-11-27 23:22:47,101 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:47 WrapperNode [2024-11-27 23:22:47,101 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-27 23:22:47,102 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-27 23:22:47,103 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-27 23:22:47,103 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-27 23:22:47,110 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:47" (1/1) ... [2024-11-27 23:22:47,125 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:47" (1/1) ... [2024-11-27 23:22:47,155 INFO L138 Inliner]: procedures = 127, calls = 47, calls flagged for inlining = 7, calls inlined = 7, statements flattened = 164 [2024-11-27 23:22:47,156 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-27 23:22:47,157 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-27 23:22:47,157 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-27 23:22:47,157 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-27 23:22:47,169 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:47" (1/1) ... [2024-11-27 23:22:47,170 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:47" (1/1) ... [2024-11-27 23:22:47,175 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:47" (1/1) ... [2024-11-27 23:22:47,208 INFO L175 MemorySlicer]: Split 28 memory accesses to 3 slices as follows [2, 16, 10]. 57 percent of accesses are in the largest equivalence class. The 3 initializations are split as follows [2, 0, 1]. The 8 writes are split as follows [0, 7, 1]. [2024-11-27 23:22:47,208 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:47" (1/1) ... [2024-11-27 23:22:47,208 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:47" (1/1) ... [2024-11-27 23:22:47,223 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:47" (1/1) ... [2024-11-27 23:22:47,225 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:47" (1/1) ... [2024-11-27 23:22:47,229 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:47" (1/1) ... [2024-11-27 23:22:47,232 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:47" (1/1) ... [2024-11-27 23:22:47,233 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:47" (1/1) ... [2024-11-27 23:22:47,238 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-27 23:22:47,239 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-27 23:22:47,239 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-27 23:22:47,239 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-27 23:22:47,240 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:47" (1/1) ... [2024-11-27 23:22:47,248 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-27 23:22:47,263 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:22:47,281 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-27 23:22:47,288 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-27 23:22:47,323 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-27 23:22:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-27 23:22:47,324 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-27 23:22:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-27 23:22:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-27 23:22:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-27 23:22:47,325 INFO L130 BoogieDeclarations]: Found specification of procedure node_create [2024-11-27 23:22:47,325 INFO L138 BoogieDeclarations]: Found implementation of procedure node_create [2024-11-27 23:22:47,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2024-11-27 23:22:47,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-27 23:22:47,326 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-27 23:22:47,326 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#0 [2024-11-27 23:22:47,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#1 [2024-11-27 23:22:47,327 INFO L130 BoogieDeclarations]: Found specification of procedure write~$Pointer$#2 [2024-11-27 23:22:47,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#0 [2024-11-27 23:22:47,327 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#1 [2024-11-27 23:22:47,328 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$#2 [2024-11-27 23:22:47,329 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-27 23:22:47,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#0 [2024-11-27 23:22:47,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#1 [2024-11-27 23:22:47,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$#2 [2024-11-27 23:22:47,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-27 23:22:47,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-27 23:22:47,329 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-27 23:22:47,330 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-27 23:22:47,330 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-27 23:22:47,547 INFO L234 CfgBuilder]: Building ICFG [2024-11-27 23:22:47,549 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-27 23:22:48,194 INFO L? ?]: Removed 147 outVars from TransFormulas that were not future-live. [2024-11-27 23:22:48,194 INFO L283 CfgBuilder]: Performing block encoding [2024-11-27 23:22:48,220 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-27 23:22:48,224 INFO L312 CfgBuilder]: Removed 5 assume(true) statements. [2024-11-27 23:22:48,224 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:22:48 BoogieIcfgContainer [2024-11-27 23:22:48,225 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-27 23:22:48,227 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-27 23:22:48,227 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-27 23:22:48,234 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-27 23:22:48,234 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 27.11 11:22:46" (1/3) ... [2024-11-27 23:22:48,235 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@478e99a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:22:48, skipping insertion in model container [2024-11-27 23:22:48,235 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 27.11 11:22:47" (2/3) ... [2024-11-27 23:22:48,236 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@478e99a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 27.11 11:22:48, skipping insertion in model container [2024-11-27 23:22:48,236 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 27.11 11:22:48" (3/3) ... [2024-11-27 23:22:48,237 INFO L128 eAbstractionObserver]: Analyzing ICFG sll2c_append_unequal.i [2024-11-27 23:22:48,259 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-27 23:22:48,261 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG sll2c_append_unequal.i that has 2 procedures, 135 locations, 1 initial locations, 5 loop locations, and 58 error locations. [2024-11-27 23:22:48,384 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-27 23:22:48,403 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;@29114c3e, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-27 23:22:48,403 INFO L334 AbstractCegarLoop]: Starting to check reachability of 58 error locations. [2024-11-27 23:22:48,409 INFO L276 IsEmpty]: Start isEmpty. Operand has 135 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 130 states have internal predecessors, (147), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:22:48,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-27 23:22:48,417 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:22:48,417 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-27 23:22:48,418 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting node_createErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:22:48,425 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:48,426 INFO L85 PathProgramCache]: Analyzing trace with hash 896229653, now seen corresponding path program 1 times [2024-11-27 23:22:48,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:48,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138524661] [2024-11-27 23:22:48,437 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:22:48,437 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:48,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:22:48,799 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 23:22:48,801 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:48,802 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138524661] [2024-11-27 23:22:48,804 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1138524661] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:22:48,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:22:48,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:22:48,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [412792136] [2024-11-27 23:22:48,811 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:22:48,817 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:22:48,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:48,854 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:22:48,855 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:22:48,859 INFO L87 Difference]: Start difference. First operand has 135 states, 72 states have (on average 2.0416666666666665) internal successors, (147), 130 states have internal predecessors, (147), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:49,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:22:49,128 INFO L93 Difference]: Finished difference Result 132 states and 143 transitions. [2024-11-27 23:22:49,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:22:49,131 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-27 23:22:49,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:22:49,142 INFO L225 Difference]: With dead ends: 132 [2024-11-27 23:22:49,143 INFO L226 Difference]: Without dead ends: 129 [2024-11-27 23:22:49,146 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:22:49,152 INFO L435 NwaCegarLoop]: 136 mSDtfsCounter, 2 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 67 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:22:49,153 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 216 Invalid, 67 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:22:49,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2024-11-27 23:22:49,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 129. [2024-11-27 23:22:49,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 129 states, 69 states have (on average 1.9275362318840579) internal successors, (133), 124 states have internal predecessors, (133), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:22:49,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 139 transitions. [2024-11-27 23:22:49,228 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 139 transitions. Word has length 6 [2024-11-27 23:22:49,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:22:49,229 INFO L471 AbstractCegarLoop]: Abstraction has 129 states and 139 transitions. [2024-11-27 23:22:49,229 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:49,229 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 139 transitions. [2024-11-27 23:22:49,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2024-11-27 23:22:49,230 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:22:49,230 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2024-11-27 23:22:49,230 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-27 23:22:49,230 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting node_createErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:22:49,231 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:49,231 INFO L85 PathProgramCache]: Analyzing trace with hash 896229654, now seen corresponding path program 1 times [2024-11-27 23:22:49,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:49,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601636743] [2024-11-27 23:22:49,231 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:22:49,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:49,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:22:49,401 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 23:22:49,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:49,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601636743] [2024-11-27 23:22:49,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [601636743] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:22:49,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:22:49,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-27 23:22:49,401 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1455610106] [2024-11-27 23:22:49,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:22:49,403 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:22:49,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:49,403 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:22:49,404 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:22:49,404 INFO L87 Difference]: Start difference. First operand 129 states and 139 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:49,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:22:49,556 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2024-11-27 23:22:49,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:22:49,557 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2024-11-27 23:22:49,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:22:49,559 INFO L225 Difference]: With dead ends: 127 [2024-11-27 23:22:49,559 INFO L226 Difference]: Without dead ends: 127 [2024-11-27 23:22:49,559 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:22:49,560 INFO L435 NwaCegarLoop]: 133 mSDtfsCounter, 2 mSDsluCounter, 84 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 217 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-27 23:22:49,561 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 217 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-27 23:22:49,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-27 23:22:49,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2024-11-27 23:22:49,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 69 states have (on average 1.8985507246376812) internal successors, (131), 122 states have internal predecessors, (131), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:22:49,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2024-11-27 23:22:49,578 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 6 [2024-11-27 23:22:49,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:22:49,578 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2024-11-27 23:22:49,578 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-27 23:22:49,579 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2024-11-27 23:22:49,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-27 23:22:49,580 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:22:49,580 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:49,580 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-27 23:22:49,581 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:22:49,581 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:49,583 INFO L85 PathProgramCache]: Analyzing trace with hash -308727562, now seen corresponding path program 1 times [2024-11-27 23:22:49,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:49,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783323374] [2024-11-27 23:22:49,584 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:22:49,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:49,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:22:49,725 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 23:22:49,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:49,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783323374] [2024-11-27 23:22:49,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [783323374] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:22:49,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:22:49,726 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-27 23:22:49,726 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [298797141] [2024-11-27 23:22:49,726 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:22:49,726 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-27 23:22:49,727 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:49,728 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-27 23:22:49,728 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:22:49,728 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:22:49,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:22:49,790 INFO L93 Difference]: Finished difference Result 134 states and 145 transitions. [2024-11-27 23:22:49,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-27 23:22:49,794 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 13 [2024-11-27 23:22:49,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:22:49,795 INFO L225 Difference]: With dead ends: 134 [2024-11-27 23:22:49,795 INFO L226 Difference]: Without dead ends: 134 [2024-11-27 23:22:49,796 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-27 23:22:49,797 INFO L435 NwaCegarLoop]: 135 mSDtfsCounter, 5 mSDsluCounter, 130 mSDsCounter, 0 mSdLazyCounter, 6 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 6 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 6 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:22:49,799 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 265 Invalid, 6 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 6 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 23:22:49,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2024-11-27 23:22:49,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 128. [2024-11-27 23:22:49,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 70 states have (on average 1.8857142857142857) internal successors, (132), 123 states have internal predecessors, (132), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:22:49,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 138 transitions. [2024-11-27 23:22:49,821 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 138 transitions. Word has length 13 [2024-11-27 23:22:49,821 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:22:49,821 INFO L471 AbstractCegarLoop]: Abstraction has 128 states and 138 transitions. [2024-11-27 23:22:49,822 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 1 states have call successors, (1), 1 states have call predecessors, (1), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2024-11-27 23:22:49,822 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 138 transitions. [2024-11-27 23:22:49,822 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-27 23:22:49,822 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:22:49,823 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:49,823 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-27 23:22:49,823 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:22:49,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:49,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1441251879, now seen corresponding path program 1 times [2024-11-27 23:22:49,828 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:49,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132219417] [2024-11-27 23:22:49,828 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:22:49,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:49,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:22:50,212 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 0 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:22:50,212 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:50,213 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132219417] [2024-11-27 23:22:50,213 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1132219417] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:22:50,213 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:22:50,213 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:22:50,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449100715] [2024-11-27 23:22:50,214 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:22:50,214 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:22:50,215 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:50,215 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:22:50,216 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:22:50,217 INFO L87 Difference]: Start difference. First operand 128 states and 138 transitions. Second operand has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:22:50,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:22:50,630 INFO L93 Difference]: Finished difference Result 127 states and 137 transitions. [2024-11-27 23:22:50,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:22:50,632 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-11-27 23:22:50,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:22:50,636 INFO L225 Difference]: With dead ends: 127 [2024-11-27 23:22:50,636 INFO L226 Difference]: Without dead ends: 127 [2024-11-27 23:22:50,636 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:22:50,641 INFO L435 NwaCegarLoop]: 128 mSDtfsCounter, 2 mSDsluCounter, 285 mSDsCounter, 0 mSdLazyCounter, 258 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 413 SdHoareTripleChecker+Invalid, 259 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 258 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2024-11-27 23:22:50,642 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 413 Invalid, 259 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 258 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2024-11-27 23:22:50,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2024-11-27 23:22:50,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 127. [2024-11-27 23:22:50,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 127 states, 70 states have (on average 1.8714285714285714) internal successors, (131), 122 states have internal predecessors, (131), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:22:50,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 127 states to 127 states and 137 transitions. [2024-11-27 23:22:50,653 INFO L78 Accepts]: Start accepts. Automaton has 127 states and 137 transitions. Word has length 22 [2024-11-27 23:22:50,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:22:50,653 INFO L471 AbstractCegarLoop]: Abstraction has 127 states and 137 transitions. [2024-11-27 23:22:50,654 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.2) internal successors, (16), 5 states have internal predecessors, (16), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:22:50,654 INFO L276 IsEmpty]: Start isEmpty. Operand 127 states and 137 transitions. [2024-11-27 23:22:50,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2024-11-27 23:22:50,655 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:22:50,655 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:50,655 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-27 23:22:50,655 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:22:50,656 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:50,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1441251878, now seen corresponding path program 1 times [2024-11-27 23:22:50,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:50,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2127811576] [2024-11-27 23:22:50,657 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:22:50,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:50,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:22:51,147 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 6 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:22:51,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:51,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2127811576] [2024-11-27 23:22:51,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2127811576] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:22:51,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:22:51,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:22:51,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1233076708] [2024-11-27 23:22:51,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:22:51,149 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:22:51,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:51,150 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:22:51,151 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:22:51,151 INFO L87 Difference]: Start difference. First operand 127 states and 137 transitions. Second operand has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:22:51,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:22:51,472 INFO L93 Difference]: Finished difference Result 126 states and 136 transitions. [2024-11-27 23:22:51,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:22:51,475 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) Word has length 22 [2024-11-27 23:22:51,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:22:51,476 INFO L225 Difference]: With dead ends: 126 [2024-11-27 23:22:51,476 INFO L226 Difference]: Without dead ends: 126 [2024-11-27 23:22:51,476 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:22:51,477 INFO L435 NwaCegarLoop]: 128 mSDtfsCounter, 1 mSDsluCounter, 309 mSDsCounter, 0 mSdLazyCounter, 229 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 437 SdHoareTripleChecker+Invalid, 229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 229 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:22:51,478 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 437 Invalid, 229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 229 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-27 23:22:51,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2024-11-27 23:22:51,492 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 126. [2024-11-27 23:22:51,492 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 70 states have (on average 1.8571428571428572) internal successors, (130), 121 states have internal predecessors, (130), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:22:51,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 136 transitions. [2024-11-27 23:22:51,494 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 136 transitions. Word has length 22 [2024-11-27 23:22:51,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:22:51,494 INFO L471 AbstractCegarLoop]: Abstraction has 126 states and 136 transitions. [2024-11-27 23:22:51,495 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 3.6) internal successors, (18), 5 states have internal predecessors, (18), 1 states have call successors, (2), 1 states have call predecessors, (2), 2 states have return successors, (2), 2 states have call predecessors, (2), 1 states have call successors, (2) [2024-11-27 23:22:51,495 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 136 transitions. [2024-11-27 23:22:51,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-27 23:22:51,496 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:22:51,496 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:51,496 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-27 23:22:51,497 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:22:51,497 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:51,497 INFO L85 PathProgramCache]: Analyzing trace with hash 453319687, now seen corresponding path program 1 times [2024-11-27 23:22:51,498 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:51,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [537499665] [2024-11-27 23:22:51,498 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:22:51,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:51,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:22:52,068 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 3 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:22:52,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:52,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [537499665] [2024-11-27 23:22:52,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [537499665] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:22:52,069 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [702045954] [2024-11-27 23:22:52,072 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:22:52,073 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:52,073 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:22:52,080 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:22:52,084 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-27 23:22:52,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:22:52,285 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-27 23:22:52,292 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:22:52,354 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 23:22:52,457 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) is different from true [2024-11-27 23:22:52,593 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2024-11-27 23:22:52,593 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 [2024-11-27 23:22:52,622 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2024-11-27 23:22:52,622 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:22:52,778 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [702045954] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:22:52,778 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:22:52,779 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 7] total 10 [2024-11-27 23:22:52,779 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [636099289] [2024-11-27 23:22:52,779 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:22:52,780 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:22:52,780 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:52,781 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:22:52,781 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=86, Unknown=1, NotChecked=18, Total=132 [2024-11-27 23:22:52,782 INFO L87 Difference]: Start difference. First operand 126 states and 136 transitions. Second operand has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:22:53,471 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:22:53,471 INFO L93 Difference]: Finished difference Result 125 states and 135 transitions. [2024-11-27 23:22:53,472 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:22:53,472 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 25 [2024-11-27 23:22:53,473 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:22:53,473 INFO L225 Difference]: With dead ends: 125 [2024-11-27 23:22:53,474 INFO L226 Difference]: Without dead ends: 125 [2024-11-27 23:22:53,474 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 30 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=37, Invalid=122, Unknown=1, NotChecked=22, Total=182 [2024-11-27 23:22:53,475 INFO L435 NwaCegarLoop]: 124 mSDtfsCounter, 2 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 432 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2 SdHoareTripleChecker+Valid, 607 SdHoareTripleChecker+Invalid, 564 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 432 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 128 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 23:22:53,475 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [2 Valid, 607 Invalid, 564 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 432 Invalid, 0 Unknown, 128 Unchecked, 0.6s Time] [2024-11-27 23:22:53,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2024-11-27 23:22:53,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 125. [2024-11-27 23:22:53,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 125 states, 70 states have (on average 1.8428571428571427) internal successors, (129), 120 states have internal predecessors, (129), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:22:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 135 transitions. [2024-11-27 23:22:53,493 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 135 transitions. Word has length 25 [2024-11-27 23:22:53,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:22:53,493 INFO L471 AbstractCegarLoop]: Abstraction has 125 states and 135 transitions. [2024-11-27 23:22:53,493 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.7) internal successors, (27), 9 states have internal predecessors, (27), 2 states have call successors, (2), 2 states have call predecessors, (2), 3 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:22:53,494 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 135 transitions. [2024-11-27 23:22:53,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2024-11-27 23:22:53,495 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:22:53,495 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:53,508 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-27 23:22:53,697 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2024-11-27 23:22:53,697 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:22:53,697 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:53,698 INFO L85 PathProgramCache]: Analyzing trace with hash 453319688, now seen corresponding path program 1 times [2024-11-27 23:22:53,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:53,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632318692] [2024-11-27 23:22:53,698 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:22:53,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:53,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:22:54,423 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:22:54,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:54,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1632318692] [2024-11-27 23:22:54,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1632318692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:22:54,424 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1884724504] [2024-11-27 23:22:54,424 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:22:54,424 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:54,424 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:22:54,429 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:22:54,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-27 23:22:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:22:54,596 INFO L256 TraceCheckSpWp]: Trace formula consists of 215 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-27 23:22:54,600 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:22:54,616 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 23:22:54,987 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-27 23:22:54,988 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 [2024-11-27 23:22:55,047 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:22:55,047 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:22:55,311 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1884724504] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:22:55,311 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:22:55,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 8] total 17 [2024-11-27 23:22:55,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [55383469] [2024-11-27 23:22:55,311 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:22:55,312 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2024-11-27 23:22:55,312 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:55,313 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2024-11-27 23:22:55,313 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=324, Unknown=0, NotChecked=0, Total=380 [2024-11-27 23:22:55,314 INFO L87 Difference]: Start difference. First operand 125 states and 135 transitions. Second operand has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 14 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 23:22:56,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:22:56,320 INFO L93 Difference]: Finished difference Result 132 states and 145 transitions. [2024-11-27 23:22:56,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:22:56,321 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 14 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 25 [2024-11-27 23:22:56,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:22:56,323 INFO L225 Difference]: With dead ends: 132 [2024-11-27 23:22:56,324 INFO L226 Difference]: Without dead ends: 132 [2024-11-27 23:22:56,324 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=77, Invalid=429, Unknown=0, NotChecked=0, Total=506 [2024-11-27 23:22:56,325 INFO L435 NwaCegarLoop]: 124 mSDtfsCounter, 5 mSDsluCounter, 706 mSDsCounter, 0 mSdLazyCounter, 624 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 830 SdHoareTripleChecker+Invalid, 635 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 624 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-27 23:22:56,326 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 830 Invalid, 635 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 624 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-27 23:22:56,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2024-11-27 23:22:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 124. [2024-11-27 23:22:56,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 70 states have (on average 1.8285714285714285) internal successors, (128), 119 states have internal predecessors, (128), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:22:56,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 134 transitions. [2024-11-27 23:22:56,334 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 134 transitions. Word has length 25 [2024-11-27 23:22:56,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:22:56,334 INFO L471 AbstractCegarLoop]: Abstraction has 124 states and 134 transitions. [2024-11-27 23:22:56,334 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.3529411764705883) internal successors, (40), 14 states have internal predecessors, (40), 3 states have call successors, (3), 3 states have call predecessors, (3), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2024-11-27 23:22:56,335 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 134 transitions. [2024-11-27 23:22:56,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-27 23:22:56,335 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:22:56,335 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:56,357 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2024-11-27 23:22:56,536 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2024-11-27 23:22:56,536 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:22:56,537 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:56,537 INFO L85 PathProgramCache]: Analyzing trace with hash -1989983775, now seen corresponding path program 1 times [2024-11-27 23:22:56,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:56,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [751387248] [2024-11-27 23:22:56,537 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:22:56,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:56,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:22:57,298 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 19 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:22:57,299 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:22:57,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [751387248] [2024-11-27 23:22:57,299 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [751387248] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:22:57,299 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6120692] [2024-11-27 23:22:57,299 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:22:57,299 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:57,300 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:22:57,302 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:22:57,307 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-27 23:22:57,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:22:57,523 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 31 conjuncts are in the unsatisfiable core [2024-11-27 23:22:57,527 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:22:57,538 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 23:22:57,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 23:22:57,625 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-27 23:22:57,626 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 [2024-11-27 23:22:57,742 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 9 treesize of output 7 [2024-11-27 23:22:57,759 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))))) is different from true [2024-11-27 23:22:57,823 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:22:57,824 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 [2024-11-27 23:22:57,917 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2024-11-27 23:22:57,955 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2024-11-27 23:22:57,955 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 [2024-11-27 23:22:57,981 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 3 trivial. 18 not checked. [2024-11-27 23:22:57,982 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:22:58,373 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [6120692] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:22:58,373 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:22:58,373 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 18 [2024-11-27 23:22:58,373 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1915548924] [2024-11-27 23:22:58,373 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:22:58,374 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 23:22:58,374 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:22:58,375 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 23:22:58,375 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=316, Unknown=2, NotChecked=74, Total=462 [2024-11-27 23:22:58,376 INFO L87 Difference]: Start difference. First operand 124 states and 134 transitions. Second operand has 19 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 3 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-27 23:22:59,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:22:59,420 INFO L93 Difference]: Finished difference Result 133 states and 144 transitions. [2024-11-27 23:22:59,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:22:59,421 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 3 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) Word has length 37 [2024-11-27 23:22:59,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:22:59,422 INFO L225 Difference]: With dead ends: 133 [2024-11-27 23:22:59,423 INFO L226 Difference]: Without dead ends: 133 [2024-11-27 23:22:59,423 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 47 SyntacticMatches, 3 SemanticMatches, 23 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=97, Invalid=415, Unknown=2, NotChecked=86, Total=600 [2024-11-27 23:22:59,424 INFO L435 NwaCegarLoop]: 62 mSDtfsCounter, 510 mSDsluCounter, 511 mSDsCounter, 0 mSdLazyCounter, 662 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 510 SdHoareTripleChecker+Valid, 573 SdHoareTripleChecker+Invalid, 953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 662 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 274 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:22:59,425 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [510 Valid, 573 Invalid, 953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 662 Invalid, 0 Unknown, 274 Unchecked, 0.9s Time] [2024-11-27 23:22:59,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2024-11-27 23:22:59,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 115. [2024-11-27 23:22:59,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 115 states, 70 states have (on average 1.7) internal successors, (119), 110 states have internal predecessors, (119), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:22:59,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 125 transitions. [2024-11-27 23:22:59,432 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 125 transitions. Word has length 37 [2024-11-27 23:22:59,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:22:59,432 INFO L471 AbstractCegarLoop]: Abstraction has 115 states and 125 transitions. [2024-11-27 23:22:59,432 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.0) internal successors, (54), 17 states have internal predecessors, (54), 3 states have call successors, (4), 1 states have call predecessors, (4), 6 states have return successors, (6), 5 states have call predecessors, (6), 3 states have call successors, (6) [2024-11-27 23:22:59,433 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 125 transitions. [2024-11-27 23:22:59,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2024-11-27 23:22:59,434 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:22:59,434 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:22:59,447 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-27 23:22:59,638 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:22:59,639 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:22:59,641 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:22:59,642 INFO L85 PathProgramCache]: Analyzing trace with hash -1989983774, now seen corresponding path program 1 times [2024-11-27 23:22:59,642 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:22:59,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167272154] [2024-11-27 23:22:59,642 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:22:59,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:22:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:00,686 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 21 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:23:00,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:00,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167272154] [2024-11-27 23:23:00,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167272154] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:00,689 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821540565] [2024-11-27 23:23:00,689 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:00,689 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:00,689 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:00,692 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:00,696 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-27 23:23:00,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:00,906 INFO L256 TraceCheckSpWp]: Trace formula consists of 325 conjuncts, 26 conjuncts are in the unsatisfiable core [2024-11-27 23:23:00,911 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:00,936 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 23:23:00,952 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 23:23:00,972 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2024-11-27 23:23:01,041 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:23:01,043 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 14 treesize of output 9 [2024-11-27 23:23:01,084 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 23:23:01,154 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:23:01,155 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 14 treesize of output 9 [2024-11-27 23:23:01,294 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 23:23:01,374 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:23:01,375 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 14 treesize of output 9 [2024-11-27 23:23:01,388 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 23:23:01,388 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:23:01,388 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821540565] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:01,389 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:23:01,389 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [13] total 15 [2024-11-27 23:23:01,389 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031525120] [2024-11-27 23:23:01,389 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:01,390 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:23:01,390 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:01,390 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:23:01,392 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=170, Unknown=1, NotChecked=26, Total=240 [2024-11-27 23:23:01,392 INFO L87 Difference]: Start difference. First operand 115 states and 125 transitions. Second operand has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:23:01,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:01,697 INFO L93 Difference]: Finished difference Result 110 states and 120 transitions. [2024-11-27 23:23:01,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-11-27 23:23:01,698 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 37 [2024-11-27 23:23:01,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:01,700 INFO L225 Difference]: With dead ends: 110 [2024-11-27 23:23:01,700 INFO L226 Difference]: Without dead ends: 110 [2024-11-27 23:23:01,700 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 37 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=49, Invalid=194, Unknown=1, NotChecked=28, Total=272 [2024-11-27 23:23:01,701 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 22 mSDsluCounter, 232 mSDsCounter, 0 mSdLazyCounter, 192 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 329 SdHoareTripleChecker+Invalid, 343 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 192 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 147 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:01,701 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 329 Invalid, 343 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 192 Invalid, 0 Unknown, 147 Unchecked, 0.2s Time] [2024-11-27 23:23:01,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2024-11-27 23:23:01,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 110. [2024-11-27 23:23:01,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 70 states have (on average 1.6285714285714286) internal successors, (114), 105 states have internal predecessors, (114), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:23:01,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 120 transitions. [2024-11-27 23:23:01,716 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 120 transitions. Word has length 37 [2024-11-27 23:23:01,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:01,716 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 120 transitions. [2024-11-27 23:23:01,716 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 5 states have (on average 3.8) internal successors, (19), 6 states have internal predecessors, (19), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:23:01,717 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 120 transitions. [2024-11-27 23:23:01,717 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-27 23:23:01,717 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:01,718 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:01,731 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:01,918 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:01,919 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:23:01,919 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:01,919 INFO L85 PathProgramCache]: Analyzing trace with hash -1113960862, now seen corresponding path program 1 times [2024-11-27 23:23:01,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:01,920 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [611352747] [2024-11-27 23:23:01,920 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:01,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:01,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:02,074 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 14 trivial. 0 not checked. [2024-11-27 23:23:02,075 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:02,075 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [611352747] [2024-11-27 23:23:02,075 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [611352747] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:02,075 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:23:02,075 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-27 23:23:02,075 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [326723981] [2024-11-27 23:23:02,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:02,076 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:23:02,076 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:02,077 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:23:02,077 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:23:02,077 INFO L87 Difference]: Start difference. First operand 110 states and 120 transitions. Second operand has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:23:02,319 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:02,320 INFO L93 Difference]: Finished difference Result 108 states and 118 transitions. [2024-11-27 23:23:02,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:23:02,321 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2024-11-27 23:23:02,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:02,322 INFO L225 Difference]: With dead ends: 108 [2024-11-27 23:23:02,322 INFO L226 Difference]: Without dead ends: 108 [2024-11-27 23:23:02,322 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:23:02,323 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 19 mSDsluCounter, 246 mSDsCounter, 0 mSdLazyCounter, 214 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 343 SdHoareTripleChecker+Invalid, 216 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 214 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:02,323 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 343 Invalid, 216 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 214 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:23:02,324 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2024-11-27 23:23:02,327 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 108. [2024-11-27 23:23:02,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 70 states have (on average 1.6) internal successors, (112), 103 states have internal predecessors, (112), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:23:02,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 118 transitions. [2024-11-27 23:23:02,329 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 118 transitions. Word has length 39 [2024-11-27 23:23:02,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:02,330 INFO L471 AbstractCegarLoop]: Abstraction has 108 states and 118 transitions. [2024-11-27 23:23:02,330 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.0) internal successors, (25), 5 states have internal predecessors, (25), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:23:02,330 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 118 transitions. [2024-11-27 23:23:02,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2024-11-27 23:23:02,331 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:02,331 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:02,332 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-11-27 23:23:02,332 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:23:02,332 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:02,333 INFO L85 PathProgramCache]: Analyzing trace with hash -1113960861, now seen corresponding path program 1 times [2024-11-27 23:23:02,333 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:02,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046695242] [2024-11-27 23:23:02,333 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:02,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:02,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:02,628 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 23:23:02,628 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:02,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046695242] [2024-11-27 23:23:02,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2046695242] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:02,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [940049146] [2024-11-27 23:23:02,629 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:02,629 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:02,629 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:02,632 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:02,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-27 23:23:02,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:02,848 INFO L256 TraceCheckSpWp]: Trace formula consists of 337 conjuncts, 17 conjuncts are in the unsatisfiable core [2024-11-27 23:23:02,851 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:02,866 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 23:23:03,007 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 12 proven. 0 refuted. 0 times theorem prover too weak. 10 trivial. 0 not checked. [2024-11-27 23:23:03,007 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:23:03,007 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [940049146] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:03,007 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:23:03,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [10] total 14 [2024-11-27 23:23:03,009 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57225285] [2024-11-27 23:23:03,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:03,010 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-27 23:23:03,010 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:03,011 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-27 23:23:03,011 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:23:03,011 INFO L87 Difference]: Start difference. First operand 108 states and 118 transitions. Second operand has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:23:03,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:03,251 INFO L93 Difference]: Finished difference Result 106 states and 116 transitions. [2024-11-27 23:23:03,252 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-27 23:23:03,252 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) Word has length 39 [2024-11-27 23:23:03,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:03,254 INFO L225 Difference]: With dead ends: 106 [2024-11-27 23:23:03,256 INFO L226 Difference]: Without dead ends: 106 [2024-11-27 23:23:03,257 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 36 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=25, Invalid=157, Unknown=0, NotChecked=0, Total=182 [2024-11-27 23:23:03,258 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 18 mSDsluCounter, 254 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 197 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:03,258 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 351 Invalid, 197 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:23:03,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-27 23:23:03,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 106. [2024-11-27 23:23:03,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 70 states have (on average 1.5714285714285714) internal successors, (110), 101 states have internal predecessors, (110), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:23:03,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 116 transitions. [2024-11-27 23:23:03,265 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 116 transitions. Word has length 39 [2024-11-27 23:23:03,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:03,265 INFO L471 AbstractCegarLoop]: Abstraction has 106 states and 116 transitions. [2024-11-27 23:23:03,265 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 5.4) internal successors, (27), 5 states have internal predecessors, (27), 1 states have call successors, (3), 1 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:23:03,265 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 116 transitions. [2024-11-27 23:23:03,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-27 23:23:03,266 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:03,266 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:03,280 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:03,466 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:03,467 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:23:03,467 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:03,467 INFO L85 PathProgramCache]: Analyzing trace with hash -1069285082, now seen corresponding path program 1 times [2024-11-27 23:23:03,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:03,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1405374258] [2024-11-27 23:23:03,467 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:03,468 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:03,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:04,052 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 17 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:23:04,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:04,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1405374258] [2024-11-27 23:23:04,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1405374258] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:04,053 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916667872] [2024-11-27 23:23:04,053 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:04,053 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:04,053 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:04,056 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:04,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-27 23:23:04,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:04,287 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 38 conjuncts are in the unsatisfiable core [2024-11-27 23:23:04,293 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:04,511 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 9 treesize of output 3 [2024-11-27 23:23:04,521 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| 1))) is different from true [2024-11-27 23:23:04,566 INFO L349 Elim1Store]: treesize reduction 27, result has 25.0 percent of original size [2024-11-27 23:23:04,567 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 18 [2024-11-27 23:23:04,645 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-27 23:23:04,651 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-27 23:23:04,651 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:23:04,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1916667872] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:04,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:23:04,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [10] imperfect sequences [14] total 20 [2024-11-27 23:23:04,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654345012] [2024-11-27 23:23:04,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:04,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-27 23:23:04,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:04,653 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-27 23:23:04,653 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=332, Unknown=1, NotChecked=36, Total=420 [2024-11-27 23:23:04,653 INFO L87 Difference]: Start difference. First operand 106 states and 116 transitions. Second operand has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:23:05,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:05,070 INFO L93 Difference]: Finished difference Result 106 states and 118 transitions. [2024-11-27 23:23:05,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-11-27 23:23:05,071 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 41 [2024-11-27 23:23:05,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:05,074 INFO L225 Difference]: With dead ends: 106 [2024-11-27 23:23:05,074 INFO L226 Difference]: Without dead ends: 106 [2024-11-27 23:23:05,075 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 35 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=66, Invalid=443, Unknown=1, NotChecked=42, Total=552 [2024-11-27 23:23:05,076 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 23 mSDsluCounter, 398 mSDsCounter, 0 mSdLazyCounter, 335 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 491 SdHoareTripleChecker+Invalid, 524 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 335 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 184 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:05,076 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 491 Invalid, 524 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 335 Invalid, 0 Unknown, 184 Unchecked, 0.3s Time] [2024-11-27 23:23:05,077 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2024-11-27 23:23:05,080 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 105. [2024-11-27 23:23:05,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 105 states, 71 states have (on average 1.5492957746478873) internal successors, (110), 100 states have internal predecessors, (110), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:23:05,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 116 transitions. [2024-11-27 23:23:05,082 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 116 transitions. Word has length 41 [2024-11-27 23:23:05,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:05,083 INFO L471 AbstractCegarLoop]: Abstraction has 105 states and 116 transitions. [2024-11-27 23:23:05,083 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 10 states have (on average 2.9) internal successors, (29), 10 states have internal predecessors, (29), 2 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:23:05,084 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 116 transitions. [2024-11-27 23:23:05,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-27 23:23:05,087 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:05,087 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:05,101 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-27 23:23:05,288 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-27 23:23:05,289 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:23:05,289 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:05,289 INFO L85 PathProgramCache]: Analyzing trace with hash -1069285081, now seen corresponding path program 1 times [2024-11-27 23:23:05,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:05,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201942273] [2024-11-27 23:23:05,290 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:05,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:05,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:06,105 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:23:06,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:06,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201942273] [2024-11-27 23:23:06,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201942273] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:06,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069490555] [2024-11-27 23:23:06,105 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:06,105 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:06,105 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:06,111 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:06,115 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-27 23:23:06,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:06,519 INFO L256 TraceCheckSpWp]: Trace formula consists of 346 conjuncts, 60 conjuncts are in the unsatisfiable core [2024-11-27 23:23:06,525 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:06,572 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 23:23:07,009 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 9 treesize of output 3 [2024-11-27 23:23:07,016 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 9 treesize of output 3 [2024-11-27 23:23:07,088 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_5| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_5|) 0) 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|))))) is different from true [2024-11-27 23:23:07,186 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-27 23:23:07,187 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 15 treesize of output 15 [2024-11-27 23:23:07,200 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 [2024-11-27 23:23:07,339 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-27 23:23:07,352 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2024-11-27 23:23:07,352 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:07,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2069490555] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:07,708 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:23:07,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 15] total 24 [2024-11-27 23:23:07,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247267445] [2024-11-27 23:23:07,709 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:07,709 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2024-11-27 23:23:07,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:07,710 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2024-11-27 23:23:07,712 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=679, Unknown=1, NotChecked=52, Total=812 [2024-11-27 23:23:07,712 INFO L87 Difference]: Start difference. First operand 105 states and 116 transitions. Second operand has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 23:23:09,189 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:09,189 INFO L93 Difference]: Finished difference Result 119 states and 130 transitions. [2024-11-27 23:23:09,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2024-11-27 23:23:09,190 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 41 [2024-11-27 23:23:09,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:09,191 INFO L225 Difference]: With dead ends: 119 [2024-11-27 23:23:09,191 INFO L226 Difference]: Without dead ends: 119 [2024-11-27 23:23:09,192 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 35 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 224 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=147, Invalid=1262, Unknown=1, NotChecked=72, Total=1482 [2024-11-27 23:23:09,193 INFO L435 NwaCegarLoop]: 83 mSDtfsCounter, 113 mSDsluCounter, 887 mSDsCounter, 0 mSdLazyCounter, 894 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 1024 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 894 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 124 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:09,193 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 970 Invalid, 1024 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 894 Invalid, 0 Unknown, 124 Unchecked, 1.0s Time] [2024-11-27 23:23:09,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2024-11-27 23:23:09,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 116. [2024-11-27 23:23:09,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 81 states have (on average 1.4814814814814814) internal successors, (120), 110 states have internal predecessors, (120), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:23:09,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 126 transitions. [2024-11-27 23:23:09,202 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 126 transitions. Word has length 41 [2024-11-27 23:23:09,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:09,202 INFO L471 AbstractCegarLoop]: Abstraction has 116 states and 126 transitions. [2024-11-27 23:23:09,203 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 23 states have (on average 2.5652173913043477) internal successors, (59), 21 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 23:23:09,203 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 126 transitions. [2024-11-27 23:23:09,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2024-11-27 23:23:09,205 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:09,205 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:09,219 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2024-11-27 23:23:09,405 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-27 23:23:09,406 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr25REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:23:09,406 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:09,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1204267626, now seen corresponding path program 1 times [2024-11-27 23:23:09,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:09,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [159479044] [2024-11-27 23:23:09,406 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:09,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:09,443 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:09,819 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 23:23:09,819 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:09,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [159479044] [2024-11-27 23:23:09,820 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [159479044] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:09,820 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665857817] [2024-11-27 23:23:09,820 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:09,820 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:09,820 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:09,825 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:09,829 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-27 23:23:10,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:10,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 370 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-27 23:23:10,081 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:10,095 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 23:23:10,099 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 23:23:10,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 23:23:10,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 23:23:10,283 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 23:23:10,283 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 [2024-11-27 23:23:10,296 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 14 treesize of output 9 [2024-11-27 23:23:10,397 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 23:23:10,430 WARN L873 $PredicateComparison]: unable to prove that (exists ((|node_create_~temp~0#1.base| Int)) (and (<= (+ |node_create_~temp~0#1.base| 1) |c_#StackHeapBarrier|) (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|))) is different from true [2024-11-27 23:23:10,488 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:23:10,489 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 14 treesize of output 9 [2024-11-27 23:23:10,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2024-11-27 23:23:10,627 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:23:10,629 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2024-11-27 23:23:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 8 trivial. 12 not checked. [2024-11-27 23:23:10,692 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:10,922 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1665857817] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:10,922 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:23:10,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 19 [2024-11-27 23:23:10,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027601376] [2024-11-27 23:23:10,922 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:10,923 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2024-11-27 23:23:10,923 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:10,924 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2024-11-27 23:23:10,924 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=330, Unknown=1, NotChecked=36, Total=420 [2024-11-27 23:23:10,924 INFO L87 Difference]: Start difference. First operand 116 states and 126 transitions. Second operand has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 15 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 23:23:11,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:11,902 INFO L93 Difference]: Finished difference Result 113 states and 123 transitions. [2024-11-27 23:23:11,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2024-11-27 23:23:11,903 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 15 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 42 [2024-11-27 23:23:11,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:11,904 INFO L225 Difference]: With dead ends: 113 [2024-11-27 23:23:11,904 INFO L226 Difference]: Without dead ends: 113 [2024-11-27 23:23:11,905 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=136, Invalid=797, Unknown=1, NotChecked=58, Total=992 [2024-11-27 23:23:11,906 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 125 mSDsluCounter, 694 mSDsCounter, 0 mSdLazyCounter, 695 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 755 SdHoareTripleChecker+Invalid, 809 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 695 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 105 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:11,906 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 755 Invalid, 809 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 695 Invalid, 0 Unknown, 105 Unchecked, 0.6s Time] [2024-11-27 23:23:11,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2024-11-27 23:23:11,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 110. [2024-11-27 23:23:11,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 79 states have (on average 1.4303797468354431) internal successors, (113), 104 states have internal predecessors, (113), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:23:11,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 119 transitions. [2024-11-27 23:23:11,912 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 119 transitions. Word has length 42 [2024-11-27 23:23:11,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:11,912 INFO L471 AbstractCegarLoop]: Abstraction has 110 states and 119 transitions. [2024-11-27 23:23:11,912 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 3.2777777777777777) internal successors, (59), 15 states have internal predecessors, (59), 4 states have call successors, (6), 3 states have call predecessors, (6), 4 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 23:23:11,913 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 119 transitions. [2024-11-27 23:23:11,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-27 23:23:11,913 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:11,914 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:11,926 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:12,117 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2024-11-27 23:23:12,118 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:23:12,118 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:12,118 INFO L85 PathProgramCache]: Analyzing trace with hash -1050986104, now seen corresponding path program 1 times [2024-11-27 23:23:12,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:12,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [228768289] [2024-11-27 23:23:12,119 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:12,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:12,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:13,729 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 17 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:13,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:13,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [228768289] [2024-11-27 23:23:13,731 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [228768289] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:13,731 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854407870] [2024-11-27 23:23:13,731 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:13,731 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:13,731 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:13,734 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:13,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-27 23:23:14,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:14,059 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 88 conjuncts are in the unsatisfiable core [2024-11-27 23:23:14,064 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:14,113 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 23:23:14,398 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 23:23:14,398 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 [2024-11-27 23:23:14,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:23:14,750 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-27 23:23:14,750 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-27 23:23:15,045 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2024-11-27 23:23:15,052 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 23:23:15,405 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#valid| (store |c_old(#valid)| |node_create_~temp~0#1.base| (select |c_#valid| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.base| |node_create_~temp~0#1.base|))))) (exists ((|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_6| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_6|) 0) 0))) is different from true [2024-11-27 23:23:15,458 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:23:15,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 38 treesize of output 27 [2024-11-27 23:23:15,511 INFO L349 Elim1Store]: treesize reduction 76, result has 36.1 percent of original size [2024-11-27 23:23:15,511 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 36 treesize of output 52 [2024-11-27 23:23:15,677 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 3 [2024-11-27 23:23:15,910 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 46 treesize of output 26 [2024-11-27 23:23:16,010 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-27 23:23:16,176 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2024-11-27 23:23:16,176 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:16,364 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [854407870] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:16,365 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:23:16,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25] total 46 [2024-11-27 23:23:16,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308678853] [2024-11-27 23:23:16,365 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:16,365 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-27 23:23:16,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:16,366 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-27 23:23:16,368 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2025, Unknown=1, NotChecked=90, Total=2256 [2024-11-27 23:23:16,368 INFO L87 Difference]: Start difference. First operand 110 states and 119 transitions. Second operand has 47 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 40 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 23:23:19,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:19,227 INFO L93 Difference]: Finished difference Result 151 states and 166 transitions. [2024-11-27 23:23:19,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-27 23:23:19,229 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 40 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2024-11-27 23:23:19,229 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:19,231 INFO L225 Difference]: With dead ends: 151 [2024-11-27 23:23:19,231 INFO L226 Difference]: Without dead ends: 151 [2024-11-27 23:23:19,232 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 36 SyntacticMatches, 2 SemanticMatches, 60 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 773 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=266, Invalid=3397, Unknown=1, NotChecked=118, Total=3782 [2024-11-27 23:23:19,233 INFO L435 NwaCegarLoop]: 80 mSDtfsCounter, 150 mSDsluCounter, 1810 mSDsCounter, 0 mSdLazyCounter, 1999 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 152 SdHoareTripleChecker+Valid, 1890 SdHoareTripleChecker+Invalid, 2164 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1999 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 151 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:19,234 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [152 Valid, 1890 Invalid, 2164 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1999 Invalid, 0 Unknown, 151 Unchecked, 2.0s Time] [2024-11-27 23:23:19,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2024-11-27 23:23:19,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 137. [2024-11-27 23:23:19,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 137 states, 103 states have (on average 1.3592233009708738) internal successors, (140), 128 states have internal predecessors, (140), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 23:23:19,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 150 transitions. [2024-11-27 23:23:19,241 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 150 transitions. Word has length 46 [2024-11-27 23:23:19,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:19,242 INFO L471 AbstractCegarLoop]: Abstraction has 137 states and 150 transitions. [2024-11-27 23:23:19,242 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 44 states have (on average 1.7272727272727273) internal successors, (76), 40 states have internal predecessors, (76), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 23:23:19,242 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 150 transitions. [2024-11-27 23:23:19,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 47 [2024-11-27 23:23:19,243 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:19,243 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:19,258 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-27 23:23:19,447 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:19,448 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:23:19,448 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:19,448 INFO L85 PathProgramCache]: Analyzing trace with hash -1050986103, now seen corresponding path program 1 times [2024-11-27 23:23:19,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:19,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265660579] [2024-11-27 23:23:19,449 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:19,449 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:19,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:21,870 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 5 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:21,870 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:21,870 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265660579] [2024-11-27 23:23:21,871 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265660579] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:21,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113427211] [2024-11-27 23:23:21,871 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:21,871 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:21,871 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:21,873 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:21,875 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-27 23:23:22,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:22,163 INFO L256 TraceCheckSpWp]: Trace formula consists of 375 conjuncts, 123 conjuncts are in the unsatisfiable core [2024-11-27 23:23:22,187 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:22,246 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 23:23:22,250 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 23:23:22,707 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-27 23:23:22,707 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 [2024-11-27 23:23:22,737 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 23:23:22,737 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 [2024-11-27 23:23:22,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:23:22,933 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:23:23,172 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-27 23:23:23,173 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2024-11-27 23:23:23,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 24 treesize of output 11 [2024-11-27 23:23:23,541 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2024-11-27 23:23:23,548 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 23:23:23,560 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 11 treesize of output 3 [2024-11-27 23:23:23,568 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2024-11-27 23:23:23,925 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_7| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_7|) 0) 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= |c_#memory_$Pointer$#1.offset| (store |c_old(#memory_$Pointer$#1.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.offset| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.base| |node_create_~temp~0#1.base|)))))) is different from true [2024-11-27 23:23:23,982 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:23:23,983 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 51 treesize of output 34 [2024-11-27 23:23:23,995 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:23:23,996 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 22 treesize of output 17 [2024-11-27 23:23:24,025 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-27 23:23:24,025 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 28 treesize of output 30 [2024-11-27 23:23:24,034 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 15 [2024-11-27 23:23:24,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 48 treesize of output 28 [2024-11-27 23:23:24,728 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 25 treesize of output 13 [2024-11-27 23:23:24,735 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 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 7 treesize of output 3 [2024-11-27 23:23:24,744 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 3 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2024-11-27 23:23:24,744 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:25,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113427211] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:25,558 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:23:25,558 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26] total 46 [2024-11-27 23:23:25,558 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1346189252] [2024-11-27 23:23:25,558 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:25,559 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2024-11-27 23:23:25,559 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:25,560 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2024-11-27 23:23:25,561 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=172, Invalid=2587, Unknown=1, NotChecked=102, Total=2862 [2024-11-27 23:23:25,561 INFO L87 Difference]: Start difference. First operand 137 states and 150 transitions. Second operand has 47 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 40 states have internal predecessors, (74), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 23:23:29,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:29,175 INFO L93 Difference]: Finished difference Result 153 states and 168 transitions. [2024-11-27 23:23:29,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2024-11-27 23:23:29,175 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 40 states have internal predecessors, (74), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 46 [2024-11-27 23:23:29,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:29,177 INFO L225 Difference]: With dead ends: 153 [2024-11-27 23:23:29,177 INFO L226 Difference]: Without dead ends: 153 [2024-11-27 23:23:29,179 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 99 GetRequests, 32 SyntacticMatches, 1 SemanticMatches, 66 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 933 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=297, Invalid=4128, Unknown=1, NotChecked=130, Total=4556 [2024-11-27 23:23:29,179 INFO L435 NwaCegarLoop]: 82 mSDtfsCounter, 144 mSDsluCounter, 1559 mSDsCounter, 0 mSdLazyCounter, 2091 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 146 SdHoareTripleChecker+Valid, 1641 SdHoareTripleChecker+Invalid, 2264 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 2091 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 153 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:29,180 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [146 Valid, 1641 Invalid, 2264 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 2091 Invalid, 0 Unknown, 153 Unchecked, 2.3s Time] [2024-11-27 23:23:29,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-27 23:23:29,184 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 136. [2024-11-27 23:23:29,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 102 states have (on average 1.3529411764705883) internal successors, (138), 127 states have internal predecessors, (138), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 23:23:29,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 148 transitions. [2024-11-27 23:23:29,186 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 148 transitions. Word has length 46 [2024-11-27 23:23:29,187 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:29,187 INFO L471 AbstractCegarLoop]: Abstraction has 136 states and 148 transitions. [2024-11-27 23:23:29,187 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 43 states have (on average 1.7209302325581395) internal successors, (74), 40 states have internal predecessors, (74), 6 states have call successors, (6), 4 states have call predecessors, (6), 5 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 23:23:29,187 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 148 transitions. [2024-11-27 23:23:29,188 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2024-11-27 23:23:29,188 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:29,189 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:29,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-27 23:23:29,389 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2024-11-27 23:23:29,390 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:23:29,390 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:29,390 INFO L85 PathProgramCache]: Analyzing trace with hash 222424678, now seen corresponding path program 2 times [2024-11-27 23:23:29,390 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:29,390 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [825318504] [2024-11-27 23:23:29,390 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:23:29,390 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:29,439 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:23:29,439 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:31,305 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 13 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:31,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:31,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [825318504] [2024-11-27 23:23:31,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [825318504] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:31,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [116937509] [2024-11-27 23:23:31,306 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-27 23:23:31,306 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:31,306 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:31,311 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:31,315 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-27 23:23:31,640 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-27 23:23:31,640 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:31,644 INFO L256 TraceCheckSpWp]: Trace formula consists of 404 conjuncts, 116 conjuncts are in the unsatisfiable core [2024-11-27 23:23:31,649 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:31,695 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 23:23:32,082 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2024-11-27 23:23:32,082 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 [2024-11-27 23:23:32,260 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:23:32,269 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:23:32,532 INFO L349 Elim1Store]: treesize reduction 17, result has 29.2 percent of original size [2024-11-27 23:23:32,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 56 treesize of output 38 [2024-11-27 23:23:32,543 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 27 treesize of output 22 [2024-11-27 23:23:32,945 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-27 23:23:32,946 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 64 treesize of output 31 [2024-11-27 23:23:32,953 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 23:23:32,959 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-27 23:23:33,269 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_8| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_sll_circular_append_~head#1.base_BEFORE_CALL_8|) 0) 0)) (exists ((|node_create_~temp~0#1.base| Int)) (and (= |c_#memory_$Pointer$#1.offset| (store |c_old(#memory_$Pointer$#1.offset)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.offset| |node_create_~temp~0#1.base|))) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)) (= |c_#memory_$Pointer$#1.base| (store |c_old(#memory_$Pointer$#1.base)| |node_create_~temp~0#1.base| (select |c_#memory_$Pointer$#1.base| |node_create_~temp~0#1.base|)))))) is different from true [2024-11-27 23:23:33,331 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:23:33,348 INFO L349 Elim1Store]: treesize reduction 29, result has 14.7 percent of original size [2024-11-27 23:23:33,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 2 case distinctions, treesize of input 72 treesize of output 55 [2024-11-27 23:23:33,362 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:23:33,364 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:23:33,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 3 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 35 treesize of output 33 [2024-11-27 23:23:33,389 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-27 23:23:33,389 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 28 treesize of output 30 [2024-11-27 23:23:34,364 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-27 23:23:34,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 3 new quantified variables, introduced 1 case distinctions, treesize of input 66 treesize of output 29 [2024-11-27 23:23:34,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 19 treesize of output 7 [2024-11-27 23:23:34,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 23:23:34,558 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 7 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 6 not checked. [2024-11-27 23:23:34,558 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:35,404 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [116937509] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:35,404 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:23:35,404 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28] total 54 [2024-11-27 23:23:35,404 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210365314] [2024-11-27 23:23:35,404 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:35,404 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 54 states [2024-11-27 23:23:35,405 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:35,406 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 54 interpolants. [2024-11-27 23:23:35,407 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=191, Invalid=3472, Unknown=1, NotChecked=118, Total=3782 [2024-11-27 23:23:35,407 INFO L87 Difference]: Start difference. First operand 136 states and 148 transitions. Second operand has 54 states, 51 states have (on average 1.7450980392156863) internal successors, (89), 47 states have internal predecessors, (89), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 23:23:38,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:38,816 INFO L93 Difference]: Finished difference Result 142 states and 155 transitions. [2024-11-27 23:23:38,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2024-11-27 23:23:38,816 INFO L78 Accepts]: Start accepts. Automaton has has 54 states, 51 states have (on average 1.7450980392156863) internal successors, (89), 47 states have internal predecessors, (89), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 51 [2024-11-27 23:23:38,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:38,818 INFO L225 Difference]: With dead ends: 142 [2024-11-27 23:23:38,818 INFO L226 Difference]: Without dead ends: 142 [2024-11-27 23:23:38,820 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 36 SyntacticMatches, 1 SemanticMatches, 79 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1431 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=403, Invalid=5920, Unknown=1, NotChecked=156, Total=6480 [2024-11-27 23:23:38,821 INFO L435 NwaCegarLoop]: 81 mSDtfsCounter, 101 mSDsluCounter, 1848 mSDsCounter, 0 mSdLazyCounter, 1862 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 103 SdHoareTripleChecker+Valid, 1929 SdHoareTripleChecker+Invalid, 2022 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 1862 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 140 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:38,821 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [103 Valid, 1929 Invalid, 2022 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 1862 Invalid, 0 Unknown, 140 Unchecked, 1.7s Time] [2024-11-27 23:23:38,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2024-11-27 23:23:38,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 139. [2024-11-27 23:23:38,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 139 states, 105 states have (on average 1.3428571428571427) internal successors, (141), 130 states have internal predecessors, (141), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 23:23:38,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 151 transitions. [2024-11-27 23:23:38,832 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 151 transitions. Word has length 51 [2024-11-27 23:23:38,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:38,833 INFO L471 AbstractCegarLoop]: Abstraction has 139 states and 151 transitions. [2024-11-27 23:23:38,834 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 54 states, 51 states have (on average 1.7450980392156863) internal successors, (89), 47 states have internal predecessors, (89), 6 states have call successors, (6), 4 states have call predecessors, (6), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2024-11-27 23:23:38,834 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 151 transitions. [2024-11-27 23:23:38,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 23:23:38,835 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:38,835 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:38,849 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:39,035 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:39,036 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:23:39,036 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:39,037 INFO L85 PathProgramCache]: Analyzing trace with hash 541272218, now seen corresponding path program 1 times [2024-11-27 23:23:39,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:39,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702632740] [2024-11-27 23:23:39,037 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:39,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:39,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:39,722 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 7 proven. 6 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2024-11-27 23:23:39,723 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:39,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702632740] [2024-11-27 23:23:39,723 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702632740] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:39,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1777259974] [2024-11-27 23:23:39,723 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:39,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:39,724 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:39,726 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:39,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2024-11-27 23:23:40,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:40,043 INFO L256 TraceCheckSpWp]: Trace formula consists of 434 conjuncts, 43 conjuncts are in the unsatisfiable core [2024-11-27 23:23:40,049 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:40,056 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 23:23:40,417 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 9 treesize of output 3 [2024-11-27 23:23:40,422 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 9 treesize of output 3 [2024-11-27 23:23:40,491 WARN L873 $PredicateComparison]: unable to prove that (and (exists ((|node_create_~temp~0#1.base| Int)) (and (= (store |c_old(#length)| |node_create_~temp~0#1.base| (select |c_#length| |node_create_~temp~0#1.base|)) |c_#length|) (= 0 (select |c_old(#valid)| |node_create_~temp~0#1.base|)))) (exists ((|v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_8| Int) (|v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_16| Int)) (= (select (select |c_#memory_$Pointer$#2.offset| |v_ULTIMATE.start_main_~#s~0#1.base_BEFORE_CALL_8|) |v_ULTIMATE.start_main_~#s~0#1.offset_BEFORE_CALL_16|) 0))) is different from true [2024-11-27 23:23:40,552 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:23:40,553 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 [2024-11-27 23:23:40,567 INFO L349 Elim1Store]: treesize reduction 4, result has 66.7 percent of original size [2024-11-27 23:23:40,568 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 15 treesize of output 15 [2024-11-27 23:23:40,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 9 [2024-11-27 23:23:40,889 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 6 not checked. [2024-11-27 23:23:40,889 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:41,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1777259974] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:41,252 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:23:41,252 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 14] total 28 [2024-11-27 23:23:41,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519771045] [2024-11-27 23:23:41,253 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:41,253 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2024-11-27 23:23:41,253 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:41,254 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2024-11-27 23:23:41,254 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=905, Unknown=1, NotChecked=60, Total=1056 [2024-11-27 23:23:41,254 INFO L87 Difference]: Start difference. First operand 139 states and 151 transitions. Second operand has 29 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 23:23:42,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:42,587 INFO L93 Difference]: Finished difference Result 157 states and 173 transitions. [2024-11-27 23:23:42,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2024-11-27 23:23:42,588 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) Word has length 53 [2024-11-27 23:23:42,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:42,589 INFO L225 Difference]: With dead ends: 157 [2024-11-27 23:23:42,589 INFO L226 Difference]: Without dead ends: 157 [2024-11-27 23:23:42,590 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=199, Invalid=1966, Unknown=1, NotChecked=90, Total=2256 [2024-11-27 23:23:42,591 INFO L435 NwaCegarLoop]: 64 mSDtfsCounter, 208 mSDsluCounter, 1045 mSDsCounter, 0 mSdLazyCounter, 1190 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1109 SdHoareTripleChecker+Invalid, 1335 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1190 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 138 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:42,591 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 1109 Invalid, 1335 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1190 Invalid, 0 Unknown, 138 Unchecked, 0.9s Time] [2024-11-27 23:23:42,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2024-11-27 23:23:42,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 143. [2024-11-27 23:23:42,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 143 states, 109 states have (on average 1.3577981651376148) internal successors, (148), 134 states have internal predecessors, (148), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 23:23:42,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 158 transitions. [2024-11-27 23:23:42,598 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 158 transitions. Word has length 53 [2024-11-27 23:23:42,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:42,598 INFO L471 AbstractCegarLoop]: Abstraction has 143 states and 158 transitions. [2024-11-27 23:23:42,603 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 27 states have (on average 2.888888888888889) internal successors, (78), 26 states have internal predecessors, (78), 3 states have call successors, (4), 2 states have call predecessors, (4), 4 states have return successors, (5), 5 states have call predecessors, (5), 3 states have call successors, (5) [2024-11-27 23:23:42,603 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 158 transitions. [2024-11-27 23:23:42,604 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2024-11-27 23:23:42,604 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:42,604 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:42,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:42,805 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2024-11-27 23:23:42,805 INFO L396 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr28REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:23:42,805 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:42,806 INFO L85 PathProgramCache]: Analyzing trace with hash 541272217, now seen corresponding path program 1 times [2024-11-27 23:23:42,806 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:42,806 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075757286] [2024-11-27 23:23:42,806 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:42,806 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:42,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:43,144 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 23:23:43,145 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:43,145 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075757286] [2024-11-27 23:23:43,145 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075757286] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:43,145 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:23:43,145 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [] total 9 [2024-11-27 23:23:43,145 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566888596] [2024-11-27 23:23:43,146 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:43,146 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-11-27 23:23:43,147 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:43,147 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-11-27 23:23:43,147 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2024-11-27 23:23:43,148 INFO L87 Difference]: Start difference. First operand 143 states and 158 transitions. Second operand has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:23:43,377 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:43,378 INFO L93 Difference]: Finished difference Result 147 states and 159 transitions. [2024-11-27 23:23:43,378 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-11-27 23:23:43,378 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) Word has length 53 [2024-11-27 23:23:43,379 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:43,379 INFO L225 Difference]: With dead ends: 147 [2024-11-27 23:23:43,381 INFO L226 Difference]: Without dead ends: 147 [2024-11-27 23:23:43,381 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2024-11-27 23:23:43,382 INFO L435 NwaCegarLoop]: 78 mSDtfsCounter, 80 mSDsluCounter, 225 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:43,382 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 303 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:23:43,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2024-11-27 23:23:43,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2024-11-27 23:23:43,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 109 states have (on average 1.3302752293577982) internal successors, (145), 133 states have internal predecessors, (145), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 23:23:43,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 155 transitions. [2024-11-27 23:23:43,393 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 155 transitions. Word has length 53 [2024-11-27 23:23:43,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:43,393 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 155 transitions. [2024-11-27 23:23:43,393 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 9 states have (on average 3.888888888888889) internal successors, (35), 10 states have internal predecessors, (35), 2 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 2 states have call predecessors, (3), 2 states have call successors, (3) [2024-11-27 23:23:43,393 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 155 transitions. [2024-11-27 23:23:43,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-27 23:23:43,394 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:43,394 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:43,398 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-11-27 23:23:43,398 INFO L396 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr34REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:23:43,399 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:43,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1733454229, now seen corresponding path program 1 times [2024-11-27 23:23:43,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:43,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [156237454] [2024-11-27 23:23:43,399 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:43,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:43,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:43,564 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 22 trivial. 0 not checked. [2024-11-27 23:23:43,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:43,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [156237454] [2024-11-27 23:23:43,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [156237454] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:43,565 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-27 23:23:43,565 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-11-27 23:23:43,565 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974117396] [2024-11-27 23:23:43,565 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:43,565 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-11-27 23:23:43,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:43,566 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-11-27 23:23:43,567 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=31, Unknown=0, NotChecked=0, Total=42 [2024-11-27 23:23:43,567 INFO L87 Difference]: Start difference. First operand 142 states and 155 transitions. Second operand has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:23:43,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:43,767 INFO L93 Difference]: Finished difference Result 159 states and 175 transitions. [2024-11-27 23:23:43,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-11-27 23:23:43,768 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 56 [2024-11-27 23:23:43,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:43,769 INFO L225 Difference]: With dead ends: 159 [2024-11-27 23:23:43,769 INFO L226 Difference]: Without dead ends: 159 [2024-11-27 23:23:43,770 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=30, Invalid=80, Unknown=0, NotChecked=0, Total=110 [2024-11-27 23:23:43,770 INFO L435 NwaCegarLoop]: 93 mSDtfsCounter, 64 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 133 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 467 SdHoareTripleChecker+Invalid, 137 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 133 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:43,771 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 467 Invalid, 137 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 133 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-27 23:23:43,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2024-11-27 23:23:43,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 142. [2024-11-27 23:23:43,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 110 states have (on average 1.3272727272727274) internal successors, (146), 133 states have internal predecessors, (146), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 23:23:43,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 156 transitions. [2024-11-27 23:23:43,780 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 156 transitions. Word has length 56 [2024-11-27 23:23:43,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:43,781 INFO L471 AbstractCegarLoop]: Abstraction has 142 states and 156 transitions. [2024-11-27 23:23:43,781 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 6.333333333333333) internal successors, (38), 7 states have internal predecessors, (38), 1 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2024-11-27 23:23:43,781 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 156 transitions. [2024-11-27 23:23:43,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2024-11-27 23:23:43,782 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:43,782 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:43,782 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-11-27 23:23:43,783 INFO L396 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr35REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:23:43,783 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:43,783 INFO L85 PathProgramCache]: Analyzing trace with hash 1733454230, now seen corresponding path program 1 times [2024-11-27 23:23:43,783 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:43,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912201790] [2024-11-27 23:23:43,784 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:43,784 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:43,847 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:45,236 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 15 proven. 6 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-27 23:23:45,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:45,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912201790] [2024-11-27 23:23:45,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1912201790] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:45,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [286434343] [2024-11-27 23:23:45,237 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:45,237 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:45,237 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:45,240 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:45,245 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2024-11-27 23:23:45,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:45,555 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 96 conjuncts are in the unsatisfiable core [2024-11-27 23:23:45,560 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:45,564 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 23:23:45,759 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 23:23:45,983 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-27 23:23:45,983 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 [2024-11-27 23:23:46,125 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:23:46,346 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-27 23:23:46,347 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 34 treesize of output 33 [2024-11-27 23:23:46,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 30 treesize of output 14 [2024-11-27 23:23:46,646 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 23:23:46,652 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 9 treesize of output 3 [2024-11-27 23:23:47,121 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:23:47,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 38 treesize of output 27 [2024-11-27 23:23:47,140 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-27 23:23:47,140 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 28 treesize of output 30 [2024-11-27 23:23:47,161 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 [2024-11-27 23:23:47,755 INFO L349 Elim1Store]: treesize reduction 29, result has 42.0 percent of original size [2024-11-27 23:23:47,755 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 1 case distinctions, treesize of input 45 treesize of output 38 [2024-11-27 23:23:47,767 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 17 treesize of output 13 [2024-11-27 23:23:48,056 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 50 treesize of output 39 [2024-11-27 23:23:48,562 INFO L349 Elim1Store]: treesize reduction 11, result has 8.3 percent of original size [2024-11-27 23:23:48,563 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 23:23:48,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 40 treesize of output 24 [2024-11-27 23:23:49,005 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:23:49,005 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 44 treesize of output 32 [2024-11-27 23:23:49,097 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-27 23:23:49,098 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-27 23:23:50,897 WARN L851 $PredicateComparison]: unable to prove that (let ((.cse1 (select (select |c_#memory_$Pointer$#2.offset| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|)) (.cse0 (select (select |c_#memory_$Pointer$#2.base| |c_ULTIMATE.start_main_~#s~0#1.base|) |c_ULTIMATE.start_main_~#s~0#1.offset|))) (and (or (forall ((v_ArrVal_1835 (Array Int Int)) (v_ArrVal_1834 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_28| Int) (|ULTIMATE.start_sll_circular_append_~head#1.offset| Int) (|ULTIMATE.start_sll_circular_append_~head#1.base| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_28|) 0)) (not (= (select (select (store (store |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#2.base| |ULTIMATE.start_sll_circular_append_~head#1.base|) |ULTIMATE.start_sll_circular_append_~head#1.offset|) v_ArrVal_1834) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_28| v_ArrVal_1835) .cse0) .cse1) .cse0)))) (< 0 (+ 5 .cse1))) (forall ((v_ArrVal_1835 (Array Int Int)) (v_ArrVal_1834 (Array Int Int)) (|v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_28| Int) (|ULTIMATE.start_sll_circular_append_~head#1.offset| Int) (|ULTIMATE.start_sll_circular_append_~head#1.base| Int)) (or (not (= (select |c_#valid| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_28|) 0)) (forall ((v_ArrVal_1841 Int)) (<= (+ 8 .cse1) (select (store |c_#length| |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_28| v_ArrVal_1841) .cse0))) (not (= (select (select (store (store |c_#memory_$Pointer$#1.base| (select (select |c_#memory_$Pointer$#2.base| |ULTIMATE.start_sll_circular_append_~head#1.base|) |ULTIMATE.start_sll_circular_append_~head#1.offset|) v_ArrVal_1834) |v_ULTIMATE.start_sll_circular_append_#t~ret9#1.base_28| v_ArrVal_1835) .cse0) .cse1) .cse0)))))) is different from false [2024-11-27 23:23:50,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [286434343] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:50,900 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2024-11-27 23:23:50,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 33] total 52 [2024-11-27 23:23:50,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1515367156] [2024-11-27 23:23:50,901 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2024-11-27 23:23:50,901 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2024-11-27 23:23:50,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:50,902 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2024-11-27 23:23:50,904 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=371, Invalid=4028, Unknown=27, NotChecked=130, Total=4556 [2024-11-27 23:23:50,904 INFO L87 Difference]: Start difference. First operand 142 states and 156 transitions. Second operand has 53 states, 50 states have (on average 1.94) internal successors, (97), 46 states have internal predecessors, (97), 4 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 23:23:55,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:55,374 INFO L93 Difference]: Finished difference Result 160 states and 174 transitions. [2024-11-27 23:23:55,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2024-11-27 23:23:55,375 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 50 states have (on average 1.94) internal successors, (97), 46 states have internal predecessors, (97), 4 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) Word has length 56 [2024-11-27 23:23:55,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:55,376 INFO L225 Difference]: With dead ends: 160 [2024-11-27 23:23:55,376 INFO L226 Difference]: Without dead ends: 160 [2024-11-27 23:23:55,382 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 128 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 94 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 1938 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=748, Invalid=8159, Unknown=27, NotChecked=186, Total=9120 [2024-11-27 23:23:55,383 INFO L435 NwaCegarLoop]: 61 mSDtfsCounter, 201 mSDsluCounter, 1443 mSDsCounter, 0 mSdLazyCounter, 2308 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1504 SdHoareTripleChecker+Invalid, 2326 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 2308 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:55,383 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 1504 Invalid, 2326 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 2308 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2024-11-27 23:23:55,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2024-11-27 23:23:55,391 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 144. [2024-11-27 23:23:55,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 112 states have (on average 1.3214285714285714) internal successors, (148), 135 states have internal predecessors, (148), 5 states have call successors, (5), 3 states have call predecessors, (5), 3 states have return successors, (5), 5 states have call predecessors, (5), 5 states have call successors, (5) [2024-11-27 23:23:55,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 158 transitions. [2024-11-27 23:23:55,397 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 158 transitions. Word has length 56 [2024-11-27 23:23:55,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:55,397 INFO L471 AbstractCegarLoop]: Abstraction has 144 states and 158 transitions. [2024-11-27 23:23:55,397 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 50 states have (on average 1.94) internal successors, (97), 46 states have internal predecessors, (97), 4 states have call successors, (5), 4 states have call predecessors, (5), 6 states have return successors, (6), 6 states have call predecessors, (6), 4 states have call successors, (6) [2024-11-27 23:23:55,398 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 158 transitions. [2024-11-27 23:23:55,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-27 23:23:55,398 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:55,398 INFO L218 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:55,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2024-11-27 23:23:55,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:55,599 INFO L396 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:23:55,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:55,600 INFO L85 PathProgramCache]: Analyzing trace with hash 1702147223, now seen corresponding path program 3 times [2024-11-27 23:23:55,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:55,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825807959] [2024-11-27 23:23:55,600 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:23:55,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:55,644 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 23:23:55,644 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:55,726 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 6 proven. 1 refuted. 0 times theorem prover too weak. 43 trivial. 0 not checked. [2024-11-27 23:23:55,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:55,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825807959] [2024-11-27 23:23:55,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1825807959] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:55,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965432865] [2024-11-27 23:23:55,727 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-27 23:23:55,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:55,728 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:55,730 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:55,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2024-11-27 23:23:56,158 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2024-11-27 23:23:56,159 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-27 23:23:56,161 INFO L256 TraceCheckSpWp]: Trace formula consists of 393 conjuncts, 5 conjuncts are in the unsatisfiable core [2024-11-27 23:23:56,163 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:56,190 INFO L134 CoverageAnalysis]: Checked inductivity of 50 backedges. 35 proven. 0 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2024-11-27 23:23:56,190 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-27 23:23:56,190 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965432865] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-27 23:23:56,190 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-27 23:23:56,190 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [4] total 6 [2024-11-27 23:23:56,190 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1247090959] [2024-11-27 23:23:56,190 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-27 23:23:56,191 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-27 23:23:56,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-27 23:23:56,191 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-27 23:23:56,191 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:23:56,192 INFO L87 Difference]: Start difference. First operand 144 states and 158 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 23:23:56,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-27 23:23:56,212 INFO L93 Difference]: Finished difference Result 109 states and 118 transitions. [2024-11-27 23:23:56,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-27 23:23:56,213 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) Word has length 58 [2024-11-27 23:23:56,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-27 23:23:56,214 INFO L225 Difference]: With dead ends: 109 [2024-11-27 23:23:56,214 INFO L226 Difference]: Without dead ends: 109 [2024-11-27 23:23:56,214 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2024-11-27 23:23:56,216 INFO L435 NwaCegarLoop]: 97 mSDtfsCounter, 0 mSDsluCounter, 183 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 280 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-27 23:23:56,217 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 280 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-27 23:23:56,217 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2024-11-27 23:23:56,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 109. [2024-11-27 23:23:56,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 109 states, 84 states have (on average 1.3333333333333333) internal successors, (112), 103 states have internal predecessors, (112), 3 states have call successors, (3), 2 states have call predecessors, (3), 2 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2024-11-27 23:23:56,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 109 states to 109 states and 118 transitions. [2024-11-27 23:23:56,222 INFO L78 Accepts]: Start accepts. Automaton has 109 states and 118 transitions. Word has length 58 [2024-11-27 23:23:56,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-27 23:23:56,222 INFO L471 AbstractCegarLoop]: Abstraction has 109 states and 118 transitions. [2024-11-27 23:23:56,222 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 4 states have internal predecessors, (38), 2 states have call successors, (4), 2 states have call predecessors, (4), 2 states have return successors, (4), 2 states have call predecessors, (4), 2 states have call successors, (4) [2024-11-27 23:23:56,222 INFO L276 IsEmpty]: Start isEmpty. Operand 109 states and 118 transitions. [2024-11-27 23:23:56,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2024-11-27 23:23:56,223 INFO L210 NwaCegarLoop]: Found error trace [2024-11-27 23:23:56,223 INFO L218 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-27 23:23:56,235 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2024-11-27 23:23:56,424 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:56,424 INFO L396 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr29REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 55 more)] === [2024-11-27 23:23:56,424 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-27 23:23:56,424 INFO L85 PathProgramCache]: Analyzing trace with hash -597862496, now seen corresponding path program 1 times [2024-11-27 23:23:56,425 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-27 23:23:56,425 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1147527357] [2024-11-27 23:23:56,425 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:56,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-27 23:23:56,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:58,118 INFO L134 CoverageAnalysis]: Checked inductivity of 23 backedges. 15 proven. 5 refuted. 0 times theorem prover too weak. 3 trivial. 0 not checked. [2024-11-27 23:23:58,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-27 23:23:58,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1147527357] [2024-11-27 23:23:58,119 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1147527357] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-27 23:23:58,119 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246659730] [2024-11-27 23:23:58,119 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-27 23:23:58,119 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-27 23:23:58,119 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 [2024-11-27 23:23:58,121 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-27 23:23:58,123 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f8db6d74-4f68-436d-8a3b-cdce625d8922/bin/uautomizer-verify-aQ6SnzHsRB/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2024-11-27 23:23:58,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-27 23:23:58,439 INFO L256 TraceCheckSpWp]: Trace formula consists of 463 conjuncts, 150 conjuncts are in the unsatisfiable core [2024-11-27 23:23:58,445 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-27 23:23:58,453 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 23:23:58,456 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 23:23:58,915 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2024-11-27 23:23:58,915 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 [2024-11-27 23:23:58,954 INFO L349 Elim1Store]: treesize reduction 18, result has 35.7 percent of original size [2024-11-27 23:23:58,955 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 [2024-11-27 23:23:59,138 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:23:59,147 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2024-11-27 23:23:59,365 INFO L349 Elim1Store]: treesize reduction 19, result has 20.8 percent of original size [2024-11-27 23:23:59,365 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 59 treesize of output 52 [2024-11-27 23:23:59,372 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 24 treesize of output 11 [2024-11-27 23:23:59,662 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 43 treesize of output 19 [2024-11-27 23:23:59,670 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2024-11-27 23:23:59,676 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 5 treesize of output 3 [2024-11-27 23:23:59,681 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 3 [2024-11-27 23:24:00,185 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-27 23:24:00,186 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 51 treesize of output 34 [2024-11-27 23:24:00,209 INFO L349 Elim1Store]: treesize reduction 29, result has 46.3 percent of original size [2024-11-27 23:24:00,209 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 1 case distinctions, treesize of input 22 treesize of output 29 [2024-11-27 23:24:00,239 INFO L349 Elim1Store]: treesize reduction 8, result has 72.4 percent of original size [2024-11-27 23:24:00,239 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 28 treesize of output 30 [2024-11-27 23:24:00,256 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 20 treesize of output 15 [2024-11-27 23:24:01,680 INFO L349 Elim1Store]: treesize reduction 67, result has 33.0 percent of original size [2024-11-27 23:24:01,680 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 96 treesize of output 57 [2024-11-27 23:24:01,732 INFO L349 Elim1Store]: treesize reduction 77, result has 12.5 percent of original size [2024-11-27 23:24:01,733 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 54 treesize of output 37 [2024-11-27 23:24:02,351 INFO L349 Elim1Store]: treesize reduction 72, result has 41.5 percent of original size [2024-11-27 23:24:02,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 3 select indices, 3 select index equivalence classes, 2 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 5 case distinctions, treesize of input 87 treesize of output 120 [2024-11-27 23:24:02,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 50 treesize of output 33 [2024-11-27 23:24:02,456 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 9 treesize of output 3 [2024-11-27 23:24:02,486 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:24:02,487 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 43 treesize of output 48 [2024-11-27 23:24:02,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 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 9 treesize of output 3 [2024-11-27 23:24:39,892 WARN L286 SmtUtils]: Spent 17.21s on a formula simplification that was a NOOP. DAG size: 2188 (called from [L 346] de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.arrays.Elim1Store.elim1) [2024-11-27 23:24:39,895 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2024-11-27 23:24:39,900 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 27 select indices, 27 select index equivalence classes, 0 disjoint index pairs (out of 351 index pairs), introduced 27 new quantified variables, introduced 351 case distinctions, treesize of input 748 treesize of output 4656