./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 6497de01 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/plugins/org.eclipse.equinox.launcher_1.6.800.v20240513-1750.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 1dc3813f801c08c10697b6f3aeaa3afb846521f0bb73d940036cc656d8340c66 --- Real Ultimate output --- This is Ultimate 0.3.0-dev-6497de0 [2024-11-23 22:51:25,081 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-23 22:51:25,165 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2024-11-23 22:51:25,171 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-23 22:51:25,171 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-23 22:51:25,194 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-23 22:51:25,195 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-23 22:51:25,195 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-23 22:51:25,195 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-11-23 22:51:25,195 INFO L153 SettingsManager]: * Use memory slicer=true [2024-11-23 22:51:25,196 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-23 22:51:25,196 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-23 22:51:25,196 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-11-23 22:51:25,196 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-11-23 22:51:25,196 INFO L153 SettingsManager]: * Use SBE=true [2024-11-23 22:51:25,197 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-23 22:51:25,197 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-23 22:51:25,197 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-23 22:51:25,197 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-23 22:51:25,197 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-23 22:51:25,197 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2024-11-23 22:51:25,198 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2024-11-23 22:51:25,198 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2024-11-23 22:51:25,198 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-23 22:51:25,198 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2024-11-23 22:51:25,198 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2024-11-23 22:51:25,198 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-23 22:51:25,198 INFO L153 SettingsManager]: * Behaviour of calls to undefined functions=OVERAPPROXIMATE_BEHAVIOUR [2024-11-23 22:51:25,198 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-23 22:51:25,199 INFO L151 SettingsManager]: Preferences of IcfgBuilder differ from their defaults: [2024-11-23 22:51:25,199 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 22:51:25,199 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 22:51:25,199 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 22:51:25,199 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:51:25,199 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-23 22:51:25,200 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-11-23 22:51:25,200 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-23 22:51:25,200 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-23 22:51:25,200 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:51:25,200 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-23 22:51:25,200 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-23 22:51:25,200 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-11-23 22:51:25,201 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-23 22:51:25,201 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-23 22:51:25,201 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-11-23 22:51:25,201 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-11-23 22:51:25,201 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-23 22:51:25,201 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_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 1dc3813f801c08c10697b6f3aeaa3afb846521f0bb73d940036cc656d8340c66 [2024-11-23 22:51:25,565 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-23 22:51:25,577 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-23 22:51:25,580 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-23 22:51:25,581 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-23 22:51:25,581 INFO L274 PluginConnector]: CDTParser initialized [2024-11-23 22:51:25,585 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/../../sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i [2024-11-23 22:51:28,625 INFO L533 CDTParser]: Created temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/data/aba2a053f/0115a34e575841c49529b8e304716aea/FLAGaa1c18461 [2024-11-23 22:51:28,906 INFO L384 CDTParser]: Found 1 translation units. [2024-11-23 22:51:28,907 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/sv-benchmarks/c/array-examples/standard_strcpy_ground-2.i [2024-11-23 22:51:28,930 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/data/aba2a053f/0115a34e575841c49529b8e304716aea/FLAGaa1c18461 [2024-11-23 22:51:28,961 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/data/aba2a053f/0115a34e575841c49529b8e304716aea [2024-11-23 22:51:28,963 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-23 22:51:28,964 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-23 22:51:28,966 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-23 22:51:28,966 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-23 22:51:28,971 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-23 22:51:28,972 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:51:28" (1/1) ... [2024-11-23 22:51:28,973 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@26d0362f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:28, skipping insertion in model container [2024-11-23 22:51:28,973 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 10:51:28" (1/1) ... [2024-11-23 22:51:28,988 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-23 22:51:29,187 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 22:51:29,195 INFO L200 MainTranslator]: Completed pre-run [2024-11-23 22:51:29,211 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-23 22:51:29,225 INFO L204 MainTranslator]: Completed translation [2024-11-23 22:51:29,226 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:29 WrapperNode [2024-11-23 22:51:29,226 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-23 22:51:29,227 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-23 22:51:29,227 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-23 22:51:29,227 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-23 22:51:29,235 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:29" (1/1) ... [2024-11-23 22:51:29,245 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:29" (1/1) ... [2024-11-23 22:51:29,264 INFO L138 Inliner]: procedures = 16, calls = 20, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 63 [2024-11-23 22:51:29,265 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-23 22:51:29,265 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-23 22:51:29,266 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-23 22:51:29,266 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-23 22:51:29,275 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:29" (1/1) ... [2024-11-23 22:51:29,275 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:29" (1/1) ... [2024-11-23 22:51:29,282 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:29" (1/1) ... [2024-11-23 22:51:29,305 INFO L175 MemorySlicer]: Split 8 memory accesses to 3 slices as follows [2, 4, 2]. 50 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2, 0, 0]. The 2 writes are split as follows [0, 1, 1]. [2024-11-23 22:51:29,306 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:29" (1/1) ... [2024-11-23 22:51:29,306 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:29" (1/1) ... [2024-11-23 22:51:29,319 INFO L184 PluginConnector]: Executing the observer ReplaceArrayAssignments from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:29" (1/1) ... [2024-11-23 22:51:29,320 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:29" (1/1) ... [2024-11-23 22:51:29,328 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:29" (1/1) ... [2024-11-23 22:51:29,329 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:29" (1/1) ... [2024-11-23 22:51:29,332 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:29" (1/1) ... [2024-11-23 22:51:29,334 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-23 22:51:29,335 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-23 22:51:29,335 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-23 22:51:29,335 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-23 22:51:29,340 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:29" (1/1) ... [2024-11-23 22:51:29,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-11-23 22:51:29,366 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:51:29,382 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-11-23 22:51:29,386 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-11-23 22:51:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-23 22:51:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-11-23 22:51:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2024-11-23 22:51:29,415 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2024-11-23 22:51:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2024-11-23 22:51:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2024-11-23 22:51:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2024-11-23 22:51:29,416 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2024-11-23 22:51:29,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-23 22:51:29,417 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-23 22:51:29,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2024-11-23 22:51:29,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2024-11-23 22:51:29,417 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2024-11-23 22:51:29,417 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2024-11-23 22:51:29,493 INFO L234 CfgBuilder]: Building ICFG [2024-11-23 22:51:29,495 INFO L260 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-23 22:51:29,736 INFO L? ?]: Removed 38 outVars from TransFormulas that were not future-live. [2024-11-23 22:51:29,736 INFO L283 CfgBuilder]: Performing block encoding [2024-11-23 22:51:29,746 INFO L307 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-23 22:51:29,747 INFO L312 CfgBuilder]: Removed 3 assume(true) statements. [2024-11-23 22:51:29,747 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:51:29 BoogieIcfgContainer [2024-11-23 22:51:29,747 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-23 22:51:29,750 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-23 22:51:29,750 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-23 22:51:29,755 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-23 22:51:29,756 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 10:51:28" (1/3) ... [2024-11-23 22:51:29,756 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6232a601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:51:29, skipping insertion in model container [2024-11-23 22:51:29,756 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 10:51:29" (2/3) ... [2024-11-23 22:51:29,757 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6232a601 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 10:51:29, skipping insertion in model container [2024-11-23 22:51:29,757 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 10:51:29" (3/3) ... [2024-11-23 22:51:29,759 INFO L128 eAbstractionObserver]: Analyzing ICFG standard_strcpy_ground-2.i [2024-11-23 22:51:29,779 INFO L216 ceAbstractionStarter]: Automizer settings: Hoare:None NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-23 22:51:29,781 INFO L151 ceAbstractionStarter]: Applying trace abstraction to ICFG standard_strcpy_ground-2.i that has 1 procedures, 41 locations, 1 initial locations, 3 loop locations, and 14 error locations. [2024-11-23 22:51:29,846 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-23 22:51:29,862 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;@4b463f15, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-23 22:51:29,862 INFO L334 AbstractCegarLoop]: Starting to check reachability of 14 error locations. [2024-11-23 22:51:29,866 INFO L276 IsEmpty]: Start isEmpty. Operand has 41 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:29,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-23 22:51:29,872 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:51:29,873 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-23 22:51:29,873 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-23 22:51:29,879 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:51:29,879 INFO L85 PathProgramCache]: Analyzing trace with hash 28706676, now seen corresponding path program 1 times [2024-11-23 22:51:29,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:51:29,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788928204] [2024-11-23 22:51:29,886 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:51:29,887 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:51:29,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:51:30,018 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:51:30,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:51:30,020 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788928204] [2024-11-23 22:51:30,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [788928204] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:51:30,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:51:30,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 22:51:30,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355820760] [2024-11-23 22:51:30,026 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:51:30,032 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 2 states [2024-11-23 22:51:30,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:51:30,065 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 2 interpolants. [2024-11-23 22:51:30,065 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-23 22:51:30,068 INFO L87 Difference]: Start difference. First operand has 41 states, 26 states have (on average 1.8461538461538463) internal successors, (48), 40 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:30,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:51:30,083 INFO L93 Difference]: Finished difference Result 40 states and 42 transitions. [2024-11-23 22:51:30,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 2 states. [2024-11-23 22:51:30,086 INFO L78 Accepts]: Start accepts. Automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-23 22:51:30,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:51:30,092 INFO L225 Difference]: With dead ends: 40 [2024-11-23 22:51:30,096 INFO L226 Difference]: Without dead ends: 38 [2024-11-23 22:51:30,098 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 0 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=1, Invalid=1, Unknown=0, NotChecked=0, Total=2 [2024-11-23 22:51:30,102 INFO L435 NwaCegarLoop]: 42 mSDtfsCounter, 0 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 0 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 0 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 0 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 22:51:30,105 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 0 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 22:51:30,120 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-23 22:51:30,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2024-11-23 22:51:30,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 24 states have (on average 1.6666666666666667) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:30,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2024-11-23 22:51:30,144 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 5 [2024-11-23 22:51:30,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:51:30,145 INFO L471 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2024-11-23 22:51:30,145 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 2 states, 2 states have (on average 2.5) internal successors, (5), 2 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:30,145 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2024-11-23 22:51:30,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-23 22:51:30,146 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:51:30,146 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-23 22:51:30,147 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-23 22:51:30,147 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-23 22:51:30,148 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:51:30,148 INFO L85 PathProgramCache]: Analyzing trace with hash 28696807, now seen corresponding path program 1 times [2024-11-23 22:51:30,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:51:30,149 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [588080659] [2024-11-23 22:51:30,149 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:51:30,149 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:51:30,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:51:30,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:51:30,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:51:30,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [588080659] [2024-11-23 22:51:30,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [588080659] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:51:30,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:51:30,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 22:51:30,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [6457852] [2024-11-23 22:51:30,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:51:30,340 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 22:51:30,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:51:30,341 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 22:51:30,341 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 22:51:30,341 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:30,412 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:51:30,413 INFO L93 Difference]: Finished difference Result 34 states and 36 transitions. [2024-11-23 22:51:30,414 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 22:51:30,414 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-23 22:51:30,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:51:30,415 INFO L225 Difference]: With dead ends: 34 [2024-11-23 22:51:30,415 INFO L226 Difference]: Without dead ends: 34 [2024-11-23 22:51:30,415 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 [2024-11-23 22:51:30,416 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 26 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 26 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:51:30,417 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [26 Valid, 23 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:51:30,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 34 states. [2024-11-23 22:51:30,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 34 to 34. [2024-11-23 22:51:30,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 24 states have (on average 1.5) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:30,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2024-11-23 22:51:30,423 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 5 [2024-11-23 22:51:30,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:51:30,426 INFO L471 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2024-11-23 22:51:30,427 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:30,427 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2024-11-23 22:51:30,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2024-11-23 22:51:30,427 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:51:30,427 INFO L218 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2024-11-23 22:51:30,428 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-23 22:51:30,428 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-23 22:51:30,428 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:51:30,428 INFO L85 PathProgramCache]: Analyzing trace with hash 28696808, now seen corresponding path program 1 times [2024-11-23 22:51:30,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:51:30,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [256499370] [2024-11-23 22:51:30,429 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:51:30,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:51:30,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:51:30,651 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:51:30,651 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:51:30,651 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [256499370] [2024-11-23 22:51:30,651 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [256499370] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:51:30,651 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:51:30,651 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 22:51:30,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1119727986] [2024-11-23 22:51:30,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:51:30,652 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 22:51:30,652 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:51:30,652 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 22:51:30,652 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 22:51:30,653 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:30,710 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:51:30,711 INFO L93 Difference]: Finished difference Result 38 states and 40 transitions. [2024-11-23 22:51:30,711 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 22:51:30,711 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2024-11-23 22:51:30,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:51:30,712 INFO L225 Difference]: With dead ends: 38 [2024-11-23 22:51:30,712 INFO L226 Difference]: Without dead ends: 38 [2024-11-23 22:51:30,713 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 [2024-11-23 22:51:30,714 INFO L435 NwaCegarLoop]: 33 mSDtfsCounter, 1 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:51:30,714 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 47 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:51:30,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2024-11-23 22:51:30,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 37. [2024-11-23 22:51:30,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 27 states have (on average 1.4444444444444444) internal successors, (39), 36 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:30,720 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 39 transitions. [2024-11-23 22:51:30,720 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 39 transitions. Word has length 5 [2024-11-23 22:51:30,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:51:30,720 INFO L471 AbstractCegarLoop]: Abstraction has 37 states and 39 transitions. [2024-11-23 22:51:30,720 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), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:30,720 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 39 transitions. [2024-11-23 22:51:30,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2024-11-23 22:51:30,721 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:51:30,721 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1] [2024-11-23 22:51:30,721 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-23 22:51:30,721 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-23 22:51:30,726 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:51:30,726 INFO L85 PathProgramCache]: Analyzing trace with hash -2139724959, now seen corresponding path program 1 times [2024-11-23 22:51:30,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:51:30,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991661903] [2024-11-23 22:51:30,726 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:51:30,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:51:30,754 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:51:30,997 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:51:30,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:51:30,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991661903] [2024-11-23 22:51:30,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991661903] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:51:30,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [159236850] [2024-11-23 22:51:30,998 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:51:30,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:51:30,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:51:31,000 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:51:31,004 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-23 22:51:31,076 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:51:31,078 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-23 22:51:31,083 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:51:31,164 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 1 [2024-11-23 22:51:31,169 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:51:31,173 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 [2024-11-23 22:51:31,292 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:51:31,292 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:51:31,436 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:51:31,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [159236850] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:51:31,437 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:51:31,437 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 3, 3] total 7 [2024-11-23 22:51:31,437 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724260173] [2024-11-23 22:51:31,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:51:31,437 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 22:51:31,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:51:31,438 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 22:51:31,438 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-11-23 22:51:31,439 INFO L87 Difference]: Start difference. First operand 37 states and 39 transitions. Second operand has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:31,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:51:31,611 INFO L93 Difference]: Finished difference Result 48 states and 52 transitions. [2024-11-23 22:51:31,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 22:51:31,612 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2024-11-23 22:51:31,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:51:31,612 INFO L225 Difference]: With dead ends: 48 [2024-11-23 22:51:31,612 INFO L226 Difference]: Without dead ends: 48 [2024-11-23 22:51:31,613 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-11-23 22:51:31,614 INFO L435 NwaCegarLoop]: 22 mSDtfsCounter, 21 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 61 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 66 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 61 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:51:31,614 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 41 Invalid, 66 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 61 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:51:31,618 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2024-11-23 22:51:31,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2024-11-23 22:51:31,623 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 39 states have (on average 1.3333333333333333) internal successors, (52), 47 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:31,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 52 transitions. [2024-11-23 22:51:31,625 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 52 transitions. Word has length 9 [2024-11-23 22:51:31,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:51:31,625 INFO L471 AbstractCegarLoop]: Abstraction has 48 states and 52 transitions. [2024-11-23 22:51:31,625 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.5714285714285716) internal successors, (25), 8 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:31,625 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 52 transitions. [2024-11-23 22:51:31,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2024-11-23 22:51:31,626 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:51:31,626 INFO L218 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1] [2024-11-23 22:51:31,638 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-23 22:51:31,826 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:51:31,827 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-23 22:51:31,827 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:51:31,827 INFO L85 PathProgramCache]: Analyzing trace with hash -842069537, now seen corresponding path program 1 times [2024-11-23 22:51:31,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:51:31,828 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918686335] [2024-11-23 22:51:31,828 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:51:31,828 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:51:31,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:51:31,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 22:51:31,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:51:31,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918686335] [2024-11-23 22:51:31,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918686335] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:51:31,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485749433] [2024-11-23 22:51:31,966 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:51:31,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:51:31,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:51:31,968 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:51:31,970 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-23 22:51:32,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:51:32,039 INFO L256 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjuncts are in the unsatisfiable core [2024-11-23 22:51:32,040 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:51:32,099 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:51:32,099 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:51:32,177 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:51:32,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1485749433] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:51:32,177 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:51:32,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 5, 5] total 11 [2024-11-23 22:51:32,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547197379] [2024-11-23 22:51:32,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:51:32,178 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2024-11-23 22:51:32,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:51:32,179 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2024-11-23 22:51:32,179 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2024-11-23 22:51:32,179 INFO L87 Difference]: Start difference. First operand 48 states and 52 transitions. Second operand has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:32,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:51:32,515 INFO L93 Difference]: Finished difference Result 174 states and 200 transitions. [2024-11-23 22:51:32,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-11-23 22:51:32,516 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2024-11-23 22:51:32,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:51:32,520 INFO L225 Difference]: With dead ends: 174 [2024-11-23 22:51:32,521 INFO L226 Difference]: Without dead ends: 174 [2024-11-23 22:51:32,521 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2024-11-23 22:51:32,522 INFO L435 NwaCegarLoop]: 18 mSDtfsCounter, 382 mSDsluCounter, 95 mSDsCounter, 0 mSdLazyCounter, 116 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 382 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 128 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 116 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 22:51:32,522 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [382 Valid, 113 Invalid, 128 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 116 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 22:51:32,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2024-11-23 22:51:32,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 55. [2024-11-23 22:51:32,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 46 states have (on average 1.2608695652173914) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:32,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2024-11-23 22:51:32,538 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 13 [2024-11-23 22:51:32,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:51:32,538 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2024-11-23 22:51:32,538 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 3.1818181818181817) internal successors, (35), 11 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:32,538 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2024-11-23 22:51:32,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2024-11-23 22:51:32,539 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:51:32,539 INFO L218 NwaCegarLoop]: trace histogram [5, 5, 4, 4, 1, 1, 1] [2024-11-23 22:51:32,551 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2024-11-23 22:51:32,739 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:51:32,740 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-23 22:51:32,740 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:51:32,740 INFO L85 PathProgramCache]: Analyzing trace with hash 88182732, now seen corresponding path program 2 times [2024-11-23 22:51:32,740 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:51:32,740 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [167513777] [2024-11-23 22:51:32,741 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:51:32,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:51:32,782 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:51:32,785 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:51:33,214 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:51:33,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:51:33,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [167513777] [2024-11-23 22:51:33,216 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [167513777] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:51:33,216 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [11586263] [2024-11-23 22:51:33,216 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:51:33,216 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:51:33,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:51:33,220 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:51:33,226 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2024-11-23 22:51:33,303 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:51:33,304 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:51:33,305 INFO L256 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 15 conjuncts are in the unsatisfiable core [2024-11-23 22:51:33,309 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:51:33,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 1 [2024-11-23 22:51:33,368 INFO L190 IndexEqualityManager]: detected not equals via solver [2024-11-23 22:51:33,372 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 [2024-11-23 22:51:33,796 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 36 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:51:33,797 INFO L308 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-23 22:51:33,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [11586263] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:51:33,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-23 22:51:33,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [6] total 12 [2024-11-23 22:51:33,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147745471] [2024-11-23 22:51:33,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:51:33,798 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-11-23 22:51:33,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:51:33,799 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-11-23 22:51:33,799 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2024-11-23 22:51:33,799 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:33,927 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:51:33,927 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2024-11-23 22:51:33,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-23 22:51:33,928 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2024-11-23 22:51:33,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:51:33,929 INFO L225 Difference]: With dead ends: 54 [2024-11-23 22:51:33,929 INFO L226 Difference]: Without dead ends: 54 [2024-11-23 22:51:33,929 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2024-11-23 22:51:33,930 INFO L435 NwaCegarLoop]: 34 mSDtfsCounter, 1 mSDsluCounter, 45 mSDsCounter, 0 mSdLazyCounter, 84 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 84 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 84 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:51:33,931 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 79 Invalid, 84 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 84 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:51:33,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2024-11-23 22:51:33,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2024-11-23 22:51:33,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 46 states have (on average 1.2173913043478262) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:33,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2024-11-23 22:51:33,936 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 21 [2024-11-23 22:51:33,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:51:33,937 INFO L471 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2024-11-23 22:51:33,937 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 3.0) internal successors, (21), 8 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:33,937 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2024-11-23 22:51:33,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-23 22:51:33,938 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:51:33,938 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:51:33,949 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2024-11-23 22:51:34,139 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:51:34,139 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-23 22:51:34,139 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:51:34,140 INFO L85 PathProgramCache]: Analyzing trace with hash -1333782368, now seen corresponding path program 1 times [2024-11-23 22:51:34,140 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:51:34,140 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582695648] [2024-11-23 22:51:34,140 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:51:34,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:51:34,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:51:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-23 22:51:34,240 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:51:34,240 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582695648] [2024-11-23 22:51:34,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [582695648] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:51:34,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:51:34,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-11-23 22:51:34,241 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1211030071] [2024-11-23 22:51:34,241 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:51:34,242 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-11-23 22:51:34,242 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:51:34,242 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-11-23 22:51:34,242 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-11-23 22:51:34,242 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:34,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:51:34,270 INFO L93 Difference]: Finished difference Result 52 states and 54 transitions. [2024-11-23 22:51:34,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-11-23 22:51:34,271 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-23 22:51:34,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:51:34,271 INFO L225 Difference]: With dead ends: 52 [2024-11-23 22:51:34,271 INFO L226 Difference]: Without dead ends: 52 [2024-11-23 22:51:34,272 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 [2024-11-23 22:51:34,272 INFO L435 NwaCegarLoop]: 23 mSDtfsCounter, 17 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 23 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 22:51:34,273 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 23 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 22:51:34,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2024-11-23 22:51:34,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 52. [2024-11-23 22:51:34,276 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 46 states have (on average 1.173913043478261) internal successors, (54), 51 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:34,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 54 transitions. [2024-11-23 22:51:34,277 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 54 transitions. Word has length 32 [2024-11-23 22:51:34,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:51:34,278 INFO L471 AbstractCegarLoop]: Abstraction has 52 states and 54 transitions. [2024-11-23 22:51:34,278 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 6.0) internal successors, (12), 3 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:34,278 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 54 transitions. [2024-11-23 22:51:34,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2024-11-23 22:51:34,279 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:51:34,279 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:51:34,279 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-23 22:51:34,279 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-23 22:51:34,279 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:51:34,280 INFO L85 PathProgramCache]: Analyzing trace with hash -1333782367, now seen corresponding path program 1 times [2024-11-23 22:51:34,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:51:34,280 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492721172] [2024-11-23 22:51:34,280 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:51:34,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:51:34,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:51:34,500 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-23 22:51:34,500 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:51:34,501 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492721172] [2024-11-23 22:51:34,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492721172] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:51:34,502 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:51:34,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 22:51:34,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543172629] [2024-11-23 22:51:34,503 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:51:34,503 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 22:51:34,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:51:34,504 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 22:51:34,505 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 22:51:34,505 INFO L87 Difference]: Start difference. First operand 52 states and 54 transitions. Second operand has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:34,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:51:34,573 INFO L93 Difference]: Finished difference Result 68 states and 73 transitions. [2024-11-23 22:51:34,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 22:51:34,574 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 32 [2024-11-23 22:51:34,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:51:34,575 INFO L225 Difference]: With dead ends: 68 [2024-11-23 22:51:34,575 INFO L226 Difference]: Without dead ends: 68 [2024-11-23 22:51:34,575 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 22:51:34,576 INFO L435 NwaCegarLoop]: 16 mSDtfsCounter, 53 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:51:34,576 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 28 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-23 22:51:34,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2024-11-23 22:51:34,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 55. [2024-11-23 22:51:34,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.183673469387755) internal successors, (58), 54 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 58 transitions. [2024-11-23 22:51:34,585 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 58 transitions. Word has length 32 [2024-11-23 22:51:34,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:51:34,585 INFO L471 AbstractCegarLoop]: Abstraction has 55 states and 58 transitions. [2024-11-23 22:51:34,586 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:34,586 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 58 transitions. [2024-11-23 22:51:34,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-23 22:51:34,586 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:51:34,586 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:51:34,587 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-23 22:51:34,587 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-23 22:51:34,589 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:51:34,589 INFO L85 PathProgramCache]: Analyzing trace with hash 1602489171, now seen corresponding path program 1 times [2024-11-23 22:51:34,589 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:51:34,589 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [365084390] [2024-11-23 22:51:34,589 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:51:34,590 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:51:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:51:34,694 INFO L134 CoverageAnalysis]: Checked inductivity of 66 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 66 trivial. 0 not checked. [2024-11-23 22:51:34,694 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:51:34,694 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [365084390] [2024-11-23 22:51:34,694 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [365084390] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:51:34,694 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:51:34,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-23 22:51:34,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89216309] [2024-11-23 22:51:34,695 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:51:34,695 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 22:51:34,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:51:34,695 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 22:51:34,695 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 22:51:34,696 INFO L87 Difference]: Start difference. First operand 55 states and 58 transitions. Second operand has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:34,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:51:34,738 INFO L93 Difference]: Finished difference Result 58 states and 61 transitions. [2024-11-23 22:51:34,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 22:51:34,738 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2024-11-23 22:51:34,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:51:34,739 INFO L225 Difference]: With dead ends: 58 [2024-11-23 22:51:34,739 INFO L226 Difference]: Without dead ends: 58 [2024-11-23 22:51:34,739 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-11-23 22:51:34,740 INFO L435 NwaCegarLoop]: 24 mSDtfsCounter, 6 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 28 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 22:51:34,740 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 45 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 22:51:34,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2024-11-23 22:51:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 57. [2024-11-23 22:51:34,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 51 states have (on average 1.1764705882352942) internal successors, (60), 56 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:34,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 60 transitions. [2024-11-23 22:51:34,744 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 60 transitions. Word has length 33 [2024-11-23 22:51:34,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:51:34,745 INFO L471 AbstractCegarLoop]: Abstraction has 57 states and 60 transitions. [2024-11-23 22:51:34,745 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.25) internal successors, (13), 4 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:34,745 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 60 transitions. [2024-11-23 22:51:34,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2024-11-23 22:51:34,746 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:51:34,746 INFO L218 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:51:34,746 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-11-23 22:51:34,747 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-23 22:51:34,747 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:51:34,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1864601166, now seen corresponding path program 1 times [2024-11-23 22:51:34,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:51:34,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029338878] [2024-11-23 22:51:34,747 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:51:34,748 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:51:34,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:51:34,953 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 22:51:34,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:51:34,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029338878] [2024-11-23 22:51:34,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1029338878] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:51:34,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441026135] [2024-11-23 22:51:34,953 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:51:34,953 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:51:34,953 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:51:34,958 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:51:34,962 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2024-11-23 22:51:35,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:51:35,046 INFO L256 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 8 conjuncts are in the unsatisfiable core [2024-11-23 22:51:35,048 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:51:35,110 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 22:51:35,111 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:51:35,281 INFO L134 CoverageAnalysis]: Checked inductivity of 67 backedges. 0 proven. 66 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 22:51:35,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1441026135] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:51:35,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:51:35,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 17 [2024-11-23 22:51:35,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275929349] [2024-11-23 22:51:35,282 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:51:35,282 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-23 22:51:35,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:51:35,283 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-23 22:51:35,283 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-11-23 22:51:35,283 INFO L87 Difference]: Start difference. First operand 57 states and 60 transitions. Second operand has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:35,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:51:35,570 INFO L93 Difference]: Finished difference Result 324 states and 379 transitions. [2024-11-23 22:51:35,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2024-11-23 22:51:35,571 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2024-11-23 22:51:35,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:51:35,572 INFO L225 Difference]: With dead ends: 324 [2024-11-23 22:51:35,573 INFO L226 Difference]: Without dead ends: 324 [2024-11-23 22:51:35,573 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2024-11-23 22:51:35,574 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 678 mSDsluCounter, 212 mSDsCounter, 0 mSdLazyCounter, 125 mSolverCounterSat, 42 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 233 SdHoareTripleChecker+Invalid, 167 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 42 IncrementalHoareTripleChecker+Valid, 125 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 22:51:35,574 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 233 Invalid, 167 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [42 Valid, 125 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 22:51:35,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2024-11-23 22:51:35,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 89. [2024-11-23 22:51:35,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 89 states, 83 states have (on average 1.108433734939759) internal successors, (92), 88 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:35,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 92 transitions. [2024-11-23 22:51:35,589 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 92 transitions. Word has length 34 [2024-11-23 22:51:35,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:51:35,590 INFO L471 AbstractCegarLoop]: Abstraction has 89 states and 92 transitions. [2024-11-23 22:51:35,590 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.823529411764706) internal successors, (65), 17 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:35,590 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 92 transitions. [2024-11-23 22:51:35,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 67 [2024-11-23 22:51:35,591 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:51:35,591 INFO L218 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:51:35,602 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2024-11-23 22:51:35,792 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2024-11-23 22:51:35,792 INFO L396 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-23 22:51:35,793 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:51:35,793 INFO L85 PathProgramCache]: Analyzing trace with hash -961441558, now seen corresponding path program 2 times [2024-11-23 22:51:35,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:51:35,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102342690] [2024-11-23 22:51:35,793 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:51:35,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:51:35,831 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:51:35,831 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:51:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 22:51:36,274 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:51:36,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102342690] [2024-11-23 22:51:36,274 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102342690] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:51:36,274 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40953764] [2024-11-23 22:51:36,274 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:51:36,274 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:51:36,274 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:51:36,277 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:51:36,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2024-11-23 22:51:36,385 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2024-11-23 22:51:36,385 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:51:36,387 INFO L256 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 16 conjuncts are in the unsatisfiable core [2024-11-23 22:51:36,391 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:51:36,516 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 22:51:36,516 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:51:37,068 INFO L134 CoverageAnalysis]: Checked inductivity of 379 backedges. 0 proven. 378 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-23 22:51:37,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [40953764] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:51:37,069 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:51:37,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 33 [2024-11-23 22:51:37,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202433519] [2024-11-23 22:51:37,069 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:51:37,070 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2024-11-23 22:51:37,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:51:37,074 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2024-11-23 22:51:37,074 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-11-23 22:51:37,074 INFO L87 Difference]: Start difference. First operand 89 states and 92 transitions. Second operand has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:37,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:51:37,749 INFO L93 Difference]: Finished difference Result 676 states and 795 transitions. [2024-11-23 22:51:37,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2024-11-23 22:51:37,750 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 66 [2024-11-23 22:51:37,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:51:37,753 INFO L225 Difference]: With dead ends: 676 [2024-11-23 22:51:37,753 INFO L226 Difference]: Without dead ends: 676 [2024-11-23 22:51:37,756 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 147 GetRequests, 116 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2024-11-23 22:51:37,757 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 1770 mSDsluCounter, 458 mSDsCounter, 0 mSdLazyCounter, 261 mSolverCounterSat, 102 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1770 SdHoareTripleChecker+Valid, 479 SdHoareTripleChecker+Invalid, 363 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 102 IncrementalHoareTripleChecker+Valid, 261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2024-11-23 22:51:37,757 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [1770 Valid, 479 Invalid, 363 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [102 Valid, 261 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2024-11-23 22:51:37,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 676 states. [2024-11-23 22:51:37,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 676 to 153. [2024-11-23 22:51:37,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 147 states have (on average 1.0612244897959184) internal successors, (156), 152 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:37,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 156 transitions. [2024-11-23 22:51:37,774 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 156 transitions. Word has length 66 [2024-11-23 22:51:37,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:51:37,774 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 156 transitions. [2024-11-23 22:51:37,775 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 3.909090909090909) internal successors, (129), 33 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:37,775 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 156 transitions. [2024-11-23 22:51:37,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-23 22:51:37,776 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:51:37,776 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:51:37,786 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2024-11-23 22:51:37,981 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2024-11-23 22:51:37,981 INFO L396 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-23 22:51:37,981 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:51:37,981 INFO L85 PathProgramCache]: Analyzing trace with hash 1320890202, now seen corresponding path program 3 times [2024-11-23 22:51:37,981 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:51:37,982 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [858893931] [2024-11-23 22:51:37,982 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:51:37,982 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:51:38,012 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 22:51:38,012 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:51:38,154 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 1770 trivial. 0 not checked. [2024-11-23 22:51:38,154 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:51:38,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [858893931] [2024-11-23 22:51:38,154 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [858893931] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:51:38,154 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [29772676] [2024-11-23 22:51:38,155 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2024-11-23 22:51:38,155 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:51:38,155 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:51:38,157 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:51:38,159 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2024-11-23 22:51:38,254 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2024-11-23 22:51:38,255 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:51:38,256 INFO L256 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjuncts are in the unsatisfiable core [2024-11-23 22:51:38,259 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:51:38,590 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 59 proven. 1 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2024-11-23 22:51:38,590 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:51:38,737 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 7 treesize of output 5 [2024-11-23 22:51:38,974 INFO L134 CoverageAnalysis]: Checked inductivity of 1771 backedges. 0 proven. 60 refuted. 0 times theorem prover too weak. 1711 trivial. 0 not checked. [2024-11-23 22:51:38,975 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [29772676] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:51:38,975 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:51:38,975 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 7, 7] total 16 [2024-11-23 22:51:38,975 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835566782] [2024-11-23 22:51:38,976 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:51:38,976 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2024-11-23 22:51:38,977 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:51:38,978 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2024-11-23 22:51:38,978 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=172, Unknown=0, NotChecked=0, Total=272 [2024-11-23 22:51:38,979 INFO L87 Difference]: Start difference. First operand 153 states and 156 transitions. Second operand has 17 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:39,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:51:39,218 INFO L93 Difference]: Finished difference Result 190 states and 200 transitions. [2024-11-23 22:51:39,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-11-23 22:51:39,218 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2024-11-23 22:51:39,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:51:39,219 INFO L225 Difference]: With dead ends: 190 [2024-11-23 22:51:39,220 INFO L226 Difference]: Without dead ends: 190 [2024-11-23 22:51:39,220 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=260, Unknown=0, NotChecked=0, Total=420 [2024-11-23 22:51:39,220 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 293 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 132 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 293 SdHoareTripleChecker+Valid, 72 SdHoareTripleChecker+Invalid, 173 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 132 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-23 22:51:39,221 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [293 Valid, 72 Invalid, 173 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 132 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-23 22:51:39,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2024-11-23 22:51:39,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 165. [2024-11-23 22:51:39,226 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 165 states, 159 states have (on average 1.0817610062893082) internal successors, (172), 164 states have internal predecessors, (172), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:39,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 172 transitions. [2024-11-23 22:51:39,227 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 172 transitions. Word has length 130 [2024-11-23 22:51:39,227 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:51:39,227 INFO L471 AbstractCegarLoop]: Abstraction has 165 states and 172 transitions. [2024-11-23 22:51:39,228 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.75) internal successors, (44), 17 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:39,228 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 172 transitions. [2024-11-23 22:51:39,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 131 [2024-11-23 22:51:39,229 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:51:39,229 INFO L218 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:51:39,241 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2024-11-23 22:51:39,434 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2024-11-23 22:51:39,434 INFO L396 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-23 22:51:39,434 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:51:39,435 INFO L85 PathProgramCache]: Analyzing trace with hash 1323050928, now seen corresponding path program 1 times [2024-11-23 22:51:39,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:51:39,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724019259] [2024-11-23 22:51:39,435 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:51:39,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:51:39,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:51:40,827 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:51:40,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:51:40,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724019259] [2024-11-23 22:51:40,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [724019259] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:51:40,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930463275] [2024-11-23 22:51:40,828 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:51:40,828 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:51:40,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:51:40,831 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:51:40,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2024-11-23 22:51:40,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:51:41,000 INFO L256 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 32 conjuncts are in the unsatisfiable core [2024-11-23 22:51:41,008 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:51:41,249 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:51:41,250 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:51:43,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1770 backedges. 0 proven. 1770 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-23 22:51:43,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [930463275] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:51:43,063 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:51:43,064 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 65 [2024-11-23 22:51:43,064 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [931061234] [2024-11-23 22:51:43,064 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:51:43,065 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2024-11-23 22:51:43,065 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:51:43,067 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2024-11-23 22:51:43,069 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2024-11-23 22:51:43,071 INFO L87 Difference]: Start difference. First operand 165 states and 172 transitions. Second operand has 65 states, 65 states have (on average 3.953846153846154) internal successors, (257), 65 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:45,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:51:45,424 INFO L93 Difference]: Finished difference Result 1380 states and 1624 transitions. [2024-11-23 22:51:45,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2024-11-23 22:51:45,425 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 3.953846153846154) internal successors, (257), 65 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 130 [2024-11-23 22:51:45,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:51:45,430 INFO L225 Difference]: With dead ends: 1380 [2024-11-23 22:51:45,430 INFO L226 Difference]: Without dead ends: 1380 [2024-11-23 22:51:45,433 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 291 GetRequests, 228 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2024-11-23 22:51:45,433 INFO L435 NwaCegarLoop]: 21 mSDtfsCounter, 3840 mSDsluCounter, 965 mSDsCounter, 0 mSdLazyCounter, 541 mSolverCounterSat, 217 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3840 SdHoareTripleChecker+Valid, 986 SdHoareTripleChecker+Invalid, 758 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 217 IncrementalHoareTripleChecker+Valid, 541 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2024-11-23 22:51:45,434 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [3840 Valid, 986 Invalid, 758 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [217 Valid, 541 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2024-11-23 22:51:45,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1380 states. [2024-11-23 22:51:45,448 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1380 to 293. [2024-11-23 22:51:45,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 293 states, 287 states have (on average 1.0452961672473868) internal successors, (300), 292 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:45,450 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 293 states to 293 states and 300 transitions. [2024-11-23 22:51:45,451 INFO L78 Accepts]: Start accepts. Automaton has 293 states and 300 transitions. Word has length 130 [2024-11-23 22:51:45,451 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:51:45,451 INFO L471 AbstractCegarLoop]: Abstraction has 293 states and 300 transitions. [2024-11-23 22:51:45,451 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 3.953846153846154) internal successors, (257), 65 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:45,452 INFO L276 IsEmpty]: Start isEmpty. Operand 293 states and 300 transitions. [2024-11-23 22:51:45,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 259 [2024-11-23 22:51:45,455 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:51:45,455 INFO L218 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:51:45,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2024-11-23 22:51:45,659 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2024-11-23 22:51:45,659 INFO L396 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr13ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-23 22:51:45,659 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:51:45,660 INFO L85 PathProgramCache]: Analyzing trace with hash -1301486448, now seen corresponding path program 2 times [2024-11-23 22:51:45,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:51:45,660 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1554523005] [2024-11-23 22:51:45,660 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:51:45,660 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:51:45,705 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 22:51:45,705 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:51:45,817 INFO L134 CoverageAnalysis]: Checked inductivity of 7626 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 7626 trivial. 0 not checked. [2024-11-23 22:51:45,817 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:51:45,817 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1554523005] [2024-11-23 22:51:45,817 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1554523005] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-23 22:51:45,817 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-23 22:51:45,817 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-11-23 22:51:45,818 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1836095116] [2024-11-23 22:51:45,818 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-23 22:51:45,818 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-23 22:51:45,818 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:51:45,819 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-23 22:51:45,819 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 22:51:45,819 INFO L87 Difference]: Start difference. First operand 293 states and 300 transitions. Second operand has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:45,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:51:45,854 INFO L93 Difference]: Finished difference Result 292 states and 299 transitions. [2024-11-23 22:51:45,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-23 22:51:45,854 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 258 [2024-11-23 22:51:45,855 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:51:45,856 INFO L225 Difference]: With dead ends: 292 [2024-11-23 22:51:45,856 INFO L226 Difference]: Without dead ends: 288 [2024-11-23 22:51:45,856 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-23 22:51:45,857 INFO L435 NwaCegarLoop]: 20 mSDtfsCounter, 14 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 14 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2024-11-23 22:51:45,857 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [14 Valid, 38 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2024-11-23 22:51:45,858 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2024-11-23 22:51:45,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 288. [2024-11-23 22:51:45,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 283 states have (on average 1.03886925795053) internal successors, (294), 287 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:45,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 294 transitions. [2024-11-23 22:51:45,865 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 294 transitions. Word has length 258 [2024-11-23 22:51:45,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:51:45,866 INFO L471 AbstractCegarLoop]: Abstraction has 288 states and 294 transitions. [2024-11-23 22:51:45,866 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.666666666666667) internal successors, (14), 4 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:51:45,866 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 294 transitions. [2024-11-23 22:51:45,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 262 [2024-11-23 22:51:45,874 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:51:45,874 INFO L218 NwaCegarLoop]: trace histogram [62, 62, 62, 62, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:51:45,874 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-11-23 22:51:45,875 INFO L396 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-23 22:51:45,875 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:51:45,875 INFO L85 PathProgramCache]: Analyzing trace with hash -1858700854, now seen corresponding path program 1 times [2024-11-23 22:51:45,875 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:51:45,875 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725054567] [2024-11-23 22:51:45,875 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:51:45,875 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:51:45,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:51:50,852 INFO L134 CoverageAnalysis]: Checked inductivity of 7630 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 22:51:50,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:51:50,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725054567] [2024-11-23 22:51:50,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [725054567] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:51:50,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132298453] [2024-11-23 22:51:50,853 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:51:50,854 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:51:50,854 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:51:50,856 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:51:50,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2024-11-23 22:51:51,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:51:51,136 INFO L256 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 64 conjuncts are in the unsatisfiable core [2024-11-23 22:51:51,143 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:51:51,566 INFO L134 CoverageAnalysis]: Checked inductivity of 7630 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 22:51:51,567 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:51:57,086 INFO L134 CoverageAnalysis]: Checked inductivity of 7630 backedges. 0 proven. 7626 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2024-11-23 22:51:57,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1132298453] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:51:57,087 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:51:57,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 129 [2024-11-23 22:51:57,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1410107467] [2024-11-23 22:51:57,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:51:57,088 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 129 states [2024-11-23 22:51:57,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:51:57,091 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 129 interpolants. [2024-11-23 22:51:57,095 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2024-11-23 22:51:57,095 INFO L87 Difference]: Start difference. First operand 288 states and 294 transitions. Second operand has 129 states, 129 states have (on average 3.9767441860465116) internal successors, (513), 129 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:52:11,876 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:52:11,876 INFO L93 Difference]: Finished difference Result 2783 states and 3157 transitions. [2024-11-23 22:52:11,877 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2024-11-23 22:52:11,877 INFO L78 Accepts]: Start accepts. Automaton has has 129 states, 129 states have (on average 3.9767441860465116) internal successors, (513), 129 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 261 [2024-11-23 22:52:11,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:52:11,888 INFO L225 Difference]: With dead ends: 2783 [2024-11-23 22:52:11,888 INFO L226 Difference]: Without dead ends: 2783 [2024-11-23 22:52:11,892 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 585 GetRequests, 458 SyntacticMatches, 0 SemanticMatches, 127 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=8256, Invalid=8256, Unknown=0, NotChecked=0, Total=16512 [2024-11-23 22:52:11,892 INFO L435 NwaCegarLoop]: 19 mSDtfsCounter, 9644 mSDsluCounter, 1908 mSDsCounter, 0 mSdLazyCounter, 1036 mSolverCounterSat, 539 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9644 SdHoareTripleChecker+Valid, 1927 SdHoareTripleChecker+Invalid, 1575 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 539 IncrementalHoareTripleChecker+Valid, 1036 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2024-11-23 22:52:11,893 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [9644 Valid, 1927 Invalid, 1575 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [539 Valid, 1036 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2024-11-23 22:52:11,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2783 states. [2024-11-23 22:52:11,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2783 to 544. [2024-11-23 22:52:11,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 544 states, 539 states have (on average 1.0204081632653061) internal successors, (550), 543 states have internal predecessors, (550), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:52:11,963 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 544 states to 544 states and 550 transitions. [2024-11-23 22:52:11,964 INFO L78 Accepts]: Start accepts. Automaton has 544 states and 550 transitions. Word has length 261 [2024-11-23 22:52:11,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:52:11,964 INFO L471 AbstractCegarLoop]: Abstraction has 544 states and 550 transitions. [2024-11-23 22:52:11,965 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 129 states, 129 states have (on average 3.9767441860465116) internal successors, (513), 129 states have internal predecessors, (513), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:52:11,965 INFO L276 IsEmpty]: Start isEmpty. Operand 544 states and 550 transitions. [2024-11-23 22:52:11,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 518 [2024-11-23 22:52:11,974 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:52:11,975 INFO L218 NwaCegarLoop]: trace histogram [126, 126, 126, 126, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:52:11,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2024-11-23 22:52:12,179 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2024-11-23 22:52:12,179 INFO L396 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-23 22:52:12,179 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:52:12,180 INFO L85 PathProgramCache]: Analyzing trace with hash -132667382, now seen corresponding path program 2 times [2024-11-23 22:52:12,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:52:12,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [660351613] [2024-11-23 22:52:12,180 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:52:12,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:52:12,282 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 22:52:12,282 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:52:12,411 INFO L134 CoverageAnalysis]: Checked inductivity of 31630 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31627 trivial. 0 not checked. [2024-11-23 22:52:12,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:52:12,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [660351613] [2024-11-23 22:52:12,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [660351613] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:52:12,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1480645523] [2024-11-23 22:52:12,413 INFO L95 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2024-11-23 22:52:12,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:52:12,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:52:12,416 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:52:12,419 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2024-11-23 22:52:12,651 INFO L229 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2024-11-23 22:52:12,651 INFO L230 tOrderPrioritization]: Conjunction of SSA is unsat [2024-11-23 22:52:12,653 INFO L256 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjuncts are in the unsatisfiable core [2024-11-23 22:52:12,663 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:52:12,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 10 treesize of output 8 [2024-11-23 22:52:12,695 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 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 13 treesize of output 1 [2024-11-23 22:52:18,728 INFO L134 CoverageAnalysis]: Checked inductivity of 31630 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31627 trivial. 0 not checked. [2024-11-23 22:52:18,728 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:52:28,233 INFO L134 CoverageAnalysis]: Checked inductivity of 31630 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 31627 trivial. 0 not checked. [2024-11-23 22:52:28,234 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1480645523] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:52:28,234 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:52:28,234 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 3, 3] total 8 [2024-11-23 22:52:28,234 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272273359] [2024-11-23 22:52:28,234 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:52:28,235 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-11-23 22:52:28,235 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:52:28,236 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-11-23 22:52:28,236 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-11-23 22:52:28,236 INFO L87 Difference]: Start difference. First operand 544 states and 550 transitions. Second operand has 9 states, 8 states have (on average 6.125) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:52:32,257 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.01s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2024-11-23 22:52:32,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 22:52:32,370 INFO L93 Difference]: Finished difference Result 543 states and 547 transitions. [2024-11-23 22:52:32,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-11-23 22:52:32,370 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 517 [2024-11-23 22:52:32,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 22:52:32,372 INFO L225 Difference]: With dead ends: 543 [2024-11-23 22:52:32,373 INFO L226 Difference]: Without dead ends: 543 [2024-11-23 22:52:32,373 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1038 GetRequests, 1029 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=41, Invalid=69, Unknown=0, NotChecked=0, Total=110 [2024-11-23 22:52:32,373 INFO L435 NwaCegarLoop]: 15 mSDtfsCounter, 57 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2024-11-23 22:52:32,374 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 17 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 37 Invalid, 1 Unknown, 0 Unchecked, 4.1s Time] [2024-11-23 22:52:32,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 543 states. [2024-11-23 22:52:32,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 543 to 543. [2024-11-23 22:52:32,382 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 543 states, 539 states have (on average 1.0148423005565863) internal successors, (547), 542 states have internal predecessors, (547), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:52:32,383 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 543 states to 543 states and 547 transitions. [2024-11-23 22:52:32,383 INFO L78 Accepts]: Start accepts. Automaton has 543 states and 547 transitions. Word has length 517 [2024-11-23 22:52:32,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 22:52:32,384 INFO L471 AbstractCegarLoop]: Abstraction has 543 states and 547 transitions. [2024-11-23 22:52:32,384 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 6.125) internal successors, (49), 9 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 22:52:32,385 INFO L276 IsEmpty]: Start isEmpty. Operand 543 states and 547 transitions. [2024-11-23 22:52:32,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 519 [2024-11-23 22:52:32,395 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 22:52:32,395 INFO L218 NwaCegarLoop]: trace histogram [126, 126, 126, 126, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 22:52:32,405 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2024-11-23 22:52:32,599 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:52:32,599 INFO L396 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-23 22:52:32,599 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 22:52:32,600 INFO L85 PathProgramCache]: Analyzing trace with hash 182348042, now seen corresponding path program 1 times [2024-11-23 22:52:32,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 22:52:32,600 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045694319] [2024-11-23 22:52:32,600 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:52:32,600 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 22:52:32,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:52:33,579 INFO L134 CoverageAnalysis]: Checked inductivity of 31628 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 31626 trivial. 0 not checked. [2024-11-23 22:52:33,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 22:52:33,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045694319] [2024-11-23 22:52:33,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045694319] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 22:52:33,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570928215] [2024-11-23 22:52:33,580 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 22:52:33,580 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 22:52:33,580 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 22:52:33,583 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 22:52:33,585 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2024-11-23 22:52:34,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 22:52:34,107 INFO L256 TraceCheckSpWp]: Trace formula consists of 1718 conjuncts, 128 conjuncts are in the unsatisfiable core [2024-11-23 22:52:34,118 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 22:52:42,435 INFO L134 CoverageAnalysis]: Checked inductivity of 31628 backedges. 0 proven. 31626 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 22:52:42,435 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 22:53:04,397 INFO L134 CoverageAnalysis]: Checked inductivity of 31628 backedges. 0 proven. 31626 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 22:53:04,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1570928215] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 22:53:04,397 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 22:53:04,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 129, 129] total 261 [2024-11-23 22:53:04,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [358254377] [2024-11-23 22:53:04,397 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 22:53:04,398 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 261 states [2024-11-23 22:53:04,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 22:53:04,408 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 261 interpolants. [2024-11-23 22:53:04,416 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=33165, Invalid=34695, Unknown=0, NotChecked=0, Total=67860 [2024-11-23 22:53:04,417 INFO L87 Difference]: Start difference. First operand 543 states and 547 transitions. Second operand has 261 states, 261 states have (on average 3.9846743295019156) internal successors, (1040), 261 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:02:26,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-23 23:02:26,422 INFO L93 Difference]: Finished difference Result 8138 states and 8897 transitions. [2024-11-23 23:02:26,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 764 states. [2024-11-23 23:02:26,424 INFO L78 Accepts]: Start accepts. Automaton has has 261 states, 261 states have (on average 3.9846743295019156) internal successors, (1040), 261 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 518 [2024-11-23 23:02:26,425 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-23 23:02:26,447 INFO L225 Difference]: With dead ends: 8138 [2024-11-23 23:02:26,447 INFO L226 Difference]: Without dead ends: 8138 [2024-11-23 23:02:26,497 INFO L434 NwaCegarLoop]: 0 DeclaredPredicates, 1546 GetRequests, 781 SyntacticMatches, 0 SemanticMatches, 765 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145041 ImplicationChecksByTransitivity, 103.0s TimeCoverageRelationStatistics Valid=195844, Invalid=391678, Unknown=0, NotChecked=0, Total=587522 [2024-11-23 23:02:26,498 INFO L435 NwaCegarLoop]: 14 mSDtfsCounter, 49852 mSDsluCounter, 2557 mSDsCounter, 0 mSdLazyCounter, 3341 mSolverCounterSat, 1164 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49852 SdHoareTripleChecker+Valid, 2571 SdHoareTripleChecker+Invalid, 4505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.2s SdHoareTripleChecker+Time, 1164 IncrementalHoareTripleChecker+Valid, 3341 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.9s IncrementalHoareTripleChecker+Time [2024-11-23 23:02:26,498 INFO L436 NwaCegarLoop]: SdHoareTripleChecker [49852 Valid, 2571 Invalid, 4505 Unknown, 0 Unchecked, 0.2s Time], IncrementalHoareTripleChecker [1164 Valid, 3341 Invalid, 0 Unknown, 0 Unchecked, 5.9s Time] [2024-11-23 23:02:26,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 8138 states. [2024-11-23 23:02:26,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 8138 to 1057. [2024-11-23 23:02:26,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1057 states, 1053 states have (on average 1.0075973409306742) internal successors, (1061), 1056 states have internal predecessors, (1061), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:02:26,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1057 states to 1057 states and 1061 transitions. [2024-11-23 23:02:26,559 INFO L78 Accepts]: Start accepts. Automaton has 1057 states and 1061 transitions. Word has length 518 [2024-11-23 23:02:26,560 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-23 23:02:26,560 INFO L471 AbstractCegarLoop]: Abstraction has 1057 states and 1061 transitions. [2024-11-23 23:02:26,561 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 261 states, 261 states have (on average 3.9846743295019156) internal successors, (1040), 261 states have internal predecessors, (1040), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-11-23 23:02:26,561 INFO L276 IsEmpty]: Start isEmpty. Operand 1057 states and 1061 transitions. [2024-11-23 23:02:26,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 1032 [2024-11-23 23:02:26,575 INFO L210 NwaCegarLoop]: Found error trace [2024-11-23 23:02:26,576 INFO L218 NwaCegarLoop]: trace histogram [254, 254, 254, 254, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-23 23:02:26,591 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2024-11-23 23:02:26,781 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2024-11-23 23:02:26,781 INFO L396 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 11 more)] === [2024-11-23 23:02:26,782 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-23 23:02:26,782 INFO L85 PathProgramCache]: Analyzing trace with hash -424414030, now seen corresponding path program 1 times [2024-11-23 23:02:26,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-11-23 23:02:26,782 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700243028] [2024-11-23 23:02:26,782 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:02:26,782 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-23 23:02:27,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:02:29,740 INFO L134 CoverageAnalysis]: Checked inductivity of 128780 backedges. 0 proven. 1013 refuted. 0 times theorem prover too weak. 127767 trivial. 0 not checked. [2024-11-23 23:02:29,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-11-23 23:02:29,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700243028] [2024-11-23 23:02:29,740 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700243028] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-23 23:02:29,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464053481] [2024-11-23 23:02:29,741 INFO L97 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-23 23:02:29,741 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-23 23:02:29,741 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 [2024-11-23 23:02:29,743 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-23 23:02:29,746 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_e8abfc29-baf4-488c-809d-194b359c7a08/bin/uautomizer-verify-LYvppIcaGC/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2024-11-23 23:02:30,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-23 23:02:30,872 INFO L256 TraceCheckSpWp]: Trace formula consists of 3388 conjuncts, 256 conjuncts are in the unsatisfiable core [2024-11-23 23:02:30,904 INFO L279 TraceCheckSpWp]: Computing forward predicates... [2024-11-23 23:03:05,513 INFO L134 CoverageAnalysis]: Checked inductivity of 128780 backedges. 0 proven. 128778 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:03:05,514 INFO L312 TraceCheckSpWp]: Computing backward predicates... [2024-11-23 23:04:41,360 INFO L134 CoverageAnalysis]: Checked inductivity of 128780 backedges. 0 proven. 128778 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-23 23:04:41,360 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [464053481] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-23 23:04:41,360 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2024-11-23 23:04:41,360 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 257, 257] total 516 [2024-11-23 23:04:41,360 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688118594] [2024-11-23 23:04:41,360 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2024-11-23 23:04:41,362 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 516 states [2024-11-23 23:04:41,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-11-23 23:04:41,389 INFO L144 InterpolantAutomaton]: Constructing interpolant automaton starting with 516 interpolants. [2024-11-23 23:04:41,398 INFO L146 InterpolantAutomaton]: CoverageRelationStatistics Valid=131847, Invalid=133893, Unknown=0, NotChecked=0, Total=265740 [2024-11-23 23:04:41,399 INFO L87 Difference]: Start difference. First operand 1057 states and 1061 transitions. Second operand has 516 states, 516 states have (on average 4.00968992248062) internal successors, (2069), 516 states have internal predecessors, (2069), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)