./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya --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 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 04:51:11,970 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 04:51:12,054 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 04:51:12,058 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 04:51:12,059 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 04:51:12,080 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 04:51:12,081 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 04:51:12,082 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 04:51:12,082 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 04:51:12,083 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 04:51:12,083 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 04:51:12,084 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 04:51:12,085 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 04:51:12,085 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 04:51:12,086 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 04:51:12,086 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 04:51:12,087 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 04:51:12,087 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 04:51:12,087 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 04:51:12,088 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 04:51:12,088 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 04:51:12,091 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 04:51:12,092 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 04:51:12,092 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 04:51:12,093 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 04:51:12,093 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 04:51:12,093 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 04:51:12,094 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 04:51:12,094 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 04:51:12,094 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 04:51:12,095 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 04:51:12,095 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 04:51:12,095 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:51:12,095 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 04:51:12,096 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 04:51:12,096 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 04:51:12,096 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 04:51:12,096 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 04:51:12,096 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 04:51:12,097 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 04:51:12,097 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 04:51:12,097 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 25419aae3fa6b25817a0bb63109cdb8dd339b767b8ddb876acb37423139730d4 [2023-11-29 04:51:12,319 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 04:51:12,338 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 04:51:12,341 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 04:51:12,342 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 04:51:12,342 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 04:51:12,343 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2023-11-29 04:51:15,050 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 04:51:15,225 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 04:51:15,226 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/sv-benchmarks/c/array-examples/standard_strcpy_original-1.i [2023-11-29 04:51:15,231 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/data/99300811e/9a6bd6b432314915a638d1cbd4f4e875/FLAGacbccf5c2 [2023-11-29 04:51:15,244 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/data/99300811e/9a6bd6b432314915a638d1cbd4f4e875 [2023-11-29 04:51:15,247 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 04:51:15,248 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 04:51:15,249 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 04:51:15,249 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 04:51:15,254 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 04:51:15,254 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:51:15" (1/1) ... [2023-11-29 04:51:15,255 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@3f1cc9a0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:51:15, skipping insertion in model container [2023-11-29 04:51:15,255 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 04:51:15" (1/1) ... [2023-11-29 04:51:15,274 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 04:51:15,431 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:51:15,441 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 04:51:15,459 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 04:51:15,475 INFO L206 MainTranslator]: Completed translation [2023-11-29 04:51:15,475 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:51:15 WrapperNode [2023-11-29 04:51:15,475 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 04:51:15,476 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 04:51:15,477 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 04:51:15,477 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 04:51:15,484 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:51:15" (1/1) ... [2023-11-29 04:51:15,492 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:51:15" (1/1) ... [2023-11-29 04:51:15,511 INFO L138 Inliner]: procedures = 16, calls = 21, calls flagged for inlining = 4, calls inlined = 4, statements flattened = 67 [2023-11-29 04:51:15,512 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 04:51:15,512 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 04:51:15,513 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 04:51:15,513 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 04:51:15,524 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:51:15" (1/1) ... [2023-11-29 04:51:15,524 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:51:15" (1/1) ... [2023-11-29 04:51:15,526 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:51:15" (1/1) ... [2023-11-29 04:51:15,539 INFO L175 MemorySlicer]: Split 9 memory accesses to 3 slices as follows [2, 5, 2]. 56 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]. [2023-11-29 04:51:15,539 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:51:15" (1/1) ... [2023-11-29 04:51:15,540 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:51:15" (1/1) ... [2023-11-29 04:51:15,546 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:51:15" (1/1) ... [2023-11-29 04:51:15,549 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:51:15" (1/1) ... [2023-11-29 04:51:15,550 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:51:15" (1/1) ... [2023-11-29 04:51:15,552 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:51:15" (1/1) ... [2023-11-29 04:51:15,554 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 04:51:15,555 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 04:51:15,555 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 04:51:15,555 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 04:51:15,556 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:51:15" (1/1) ... [2023-11-29 04:51:15,562 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 04:51:15,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:51:15,583 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 04:51:15,589 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 04:51:15,614 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-29 04:51:15,614 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2023-11-29 04:51:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#1 [2023-11-29 04:51:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#2 [2023-11-29 04:51:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 04:51:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 04:51:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 04:51:15,615 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#2 [2023-11-29 04:51:15,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 04:51:15,616 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 04:51:15,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 04:51:15,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 04:51:15,616 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#2 [2023-11-29 04:51:15,616 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 04:51:15,682 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 04:51:15,684 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 04:51:15,845 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 04:51:15,883 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 04:51:15,883 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 04:51:15,884 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:51:15 BoogieIcfgContainer [2023-11-29 04:51:15,884 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 04:51:15,887 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 04:51:15,887 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 04:51:15,890 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 04:51:15,890 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 04:51:15" (1/3) ... [2023-11-29 04:51:15,890 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e0c5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:51:15, skipping insertion in model container [2023-11-29 04:51:15,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 04:51:15" (2/3) ... [2023-11-29 04:51:15,891 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43e0c5f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 04:51:15, skipping insertion in model container [2023-11-29 04:51:15,891 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 04:51:15" (3/3) ... [2023-11-29 04:51:15,892 INFO L112 eAbstractionObserver]: Analyzing ICFG standard_strcpy_original-1.i [2023-11-29 04:51:15,907 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 04:51:15,907 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 16 error locations. [2023-11-29 04:51:15,946 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 04:51:15,952 INFO L357 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, mHoare=false, mAutomataTypeConcurrency=PETRI_NET, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=All, 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;@27df18b7, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 04:51:15,953 INFO L358 AbstractCegarLoop]: Starting to check reachability of 16 error locations. [2023-11-29 04:51:15,956 INFO L276 IsEmpty]: Start isEmpty. Operand has 37 states, 20 states have (on average 2.2) internal successors, (44), 36 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) [2023-11-29 04:51:15,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-29 04:51:15,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:51:15,961 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-29 04:51:15,961 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-29 04:51:15,966 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:51:15,966 INFO L85 PathProgramCache]: Analyzing trace with hash 116603, now seen corresponding path program 1 times [2023-11-29 04:51:15,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:51:15,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681460506] [2023-11-29 04:51:15,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:15,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:51:16,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:16,199 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:51:16,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:51:16,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681460506] [2023-11-29 04:51:16,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681460506] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:51:16,201 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:51:16,201 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:51:16,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162295470] [2023-11-29 04:51:16,203 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:51:16,207 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:51:16,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:51:16,235 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:51:16,235 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:51:16,237 INFO L87 Difference]: Start difference. First operand has 37 states, 20 states have (on average 2.2) internal successors, (44), 36 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) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2023-11-29 04:51:16,289 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:51:16,289 INFO L93 Difference]: Finished difference Result 31 states and 33 transitions. [2023-11-29 04:51:16,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:51:16,291 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2023-11-29 04:51:16,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:51:16,298 INFO L225 Difference]: With dead ends: 31 [2023-11-29 04:51:16,298 INFO L226 Difference]: Without dead ends: 30 [2023-11-29 04:51:16,299 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:51:16,303 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 28 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 15 SdHoareTripleChecker+Invalid, 25 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:51:16,304 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 15 Invalid, 25 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:51:16,318 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-29 04:51:16,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-29 04:51:16,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 29 states have internal predecessors, (32), 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) [2023-11-29 04:51:16,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-11-29 04:51:16,333 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 3 [2023-11-29 04:51:16,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:51:16,333 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-11-29 04:51:16,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2023-11-29 04:51:16,334 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-11-29 04:51:16,350 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-29 04:51:16,350 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:51:16,350 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-29 04:51:16,351 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 04:51:16,351 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-29 04:51:16,352 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:51:16,352 INFO L85 PathProgramCache]: Analyzing trace with hash 116604, now seen corresponding path program 1 times [2023-11-29 04:51:16,352 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:51:16,353 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [175996794] [2023-11-29 04:51:16,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:16,353 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:51:16,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:16,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:51:16,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:51:16,508 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [175996794] [2023-11-29 04:51:16,508 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [175996794] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:51:16,508 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:51:16,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:51:16,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767821049] [2023-11-29 04:51:16,509 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:51:16,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:51:16,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:51:16,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:51:16,511 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:51:16,511 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2023-11-29 04:51:16,555 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:51:16,555 INFO L93 Difference]: Finished difference Result 32 states and 34 transitions. [2023-11-29 04:51:16,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:51:16,556 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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 3 [2023-11-29 04:51:16,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:51:16,557 INFO L225 Difference]: With dead ends: 32 [2023-11-29 04:51:16,557 INFO L226 Difference]: Without dead ends: 32 [2023-11-29 04:51:16,558 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:51:16,559 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 36 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 [2023-11-29 04:51:16,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 36 Invalid, 28 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:51:16,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 32 states. [2023-11-29 04:51:16,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 32 to 32. [2023-11-29 04:51:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 21 states have (on average 1.619047619047619) internal successors, (34), 31 states have internal predecessors, (34), 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) [2023-11-29 04:51:16,565 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 34 transitions. [2023-11-29 04:51:16,566 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 34 transitions. Word has length 3 [2023-11-29 04:51:16,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:51:16,566 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 34 transitions. [2023-11-29 04:51:16,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 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) [2023-11-29 04:51:16,566 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 34 transitions. [2023-11-29 04:51:16,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 04:51:16,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:51:16,567 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2023-11-29 04:51:16,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 04:51:16,568 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-29 04:51:16,568 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:51:16,569 INFO L85 PathProgramCache]: Analyzing trace with hash 112134608, now seen corresponding path program 1 times [2023-11-29 04:51:16,569 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:51:16,569 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139042403] [2023-11-29 04:51:16,569 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:16,570 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:51:16,588 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:16,715 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:51:16,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:51:16,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139042403] [2023-11-29 04:51:16,716 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139042403] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:51:16,716 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691765692] [2023-11-29 04:51:16,716 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:16,716 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:16,717 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:51:16,718 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:51:16,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 04:51:16,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:16,785 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-29 04:51:16,790 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:51:16,873 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 [2023-11-29 04:51:16,877 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:51:16,881 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 [2023-11-29 04:51:16,931 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:51:16,931 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:51:16,989 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:51:16,989 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [691765692] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:51:16,990 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:51:16,990 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-29 04:51:16,990 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376903710] [2023-11-29 04:51:16,990 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:51:16,991 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 04:51:16,991 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:51:16,992 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 04:51:16,992 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2023-11-29 04:51:16,992 INFO L87 Difference]: Start difference. First operand 32 states and 34 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2023-11-29 04:51:17,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:51:17,097 INFO L93 Difference]: Finished difference Result 38 states and 42 transitions. [2023-11-29 04:51:17,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 04:51:17,098 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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 [2023-11-29 04:51:17,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:51:17,100 INFO L225 Difference]: With dead ends: 38 [2023-11-29 04:51:17,100 INFO L226 Difference]: Without dead ends: 38 [2023-11-29 04:51:17,101 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2023-11-29 04:51:17,102 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 18 mSDsluCounter, 21 mSDsCounter, 0 mSdLazyCounter, 73 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 79 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 73 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:51:17,103 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 38 Invalid, 79 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 73 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 04:51:17,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-29 04:51:17,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-11-29 04:51:17,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 27 states have (on average 1.4814814814814814) internal successors, (40), 35 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) [2023-11-29 04:51:17,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 40 transitions. [2023-11-29 04:51:17,108 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 40 transitions. Word has length 5 [2023-11-29 04:51:17,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:51:17,109 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 40 transitions. [2023-11-29 04:51:17,109 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 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) [2023-11-29 04:51:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 40 transitions. [2023-11-29 04:51:17,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 04:51:17,110 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:51:17,110 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1] [2023-11-29 04:51:17,124 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 04:51:17,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:17,312 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-29 04:51:17,313 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:51:17,313 INFO L85 PathProgramCache]: Analyzing trace with hash -880027954, now seen corresponding path program 1 times [2023-11-29 04:51:17,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:51:17,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530423249] [2023-11-29 04:51:17,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:17,314 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:51:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:17,403 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:51:17,403 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:51:17,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530423249] [2023-11-29 04:51:17,403 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530423249] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:51:17,404 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804686145] [2023-11-29 04:51:17,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:17,404 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:17,404 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:51:17,405 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:51:17,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 04:51:17,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:17,460 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 04:51:17,461 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:51:17,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:51:17,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:51:17,542 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:51:17,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [804686145] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:51:17,542 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:51:17,542 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [3, 4, 4] total 10 [2023-11-29 04:51:17,543 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1520711216] [2023-11-29 04:51:17,543 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:51:17,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 04:51:17,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:51:17,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 04:51:17,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=62, Unknown=0, NotChecked=0, Total=110 [2023-11-29 04:51:17,545 INFO L87 Difference]: Start difference. First operand 36 states and 40 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 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) [2023-11-29 04:51:17,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:51:17,838 INFO L93 Difference]: Finished difference Result 176 states and 184 transitions. [2023-11-29 04:51:17,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 04:51:17,839 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 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 8 [2023-11-29 04:51:17,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:51:17,841 INFO L225 Difference]: With dead ends: 176 [2023-11-29 04:51:17,841 INFO L226 Difference]: Without dead ends: 176 [2023-11-29 04:51:17,842 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 28 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:51:17,843 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 389 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 129 mSolverCounterSat, 37 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 389 SdHoareTripleChecker+Valid, 84 SdHoareTripleChecker+Invalid, 166 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 37 IncrementalHoareTripleChecker+Valid, 129 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:51:17,843 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [389 Valid, 84 Invalid, 166 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [37 Valid, 129 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:51:17,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2023-11-29 04:51:17,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 41. [2023-11-29 04:51:17,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 32 states have (on average 1.375) internal successors, (44), 40 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) [2023-11-29 04:51:17,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 44 transitions. [2023-11-29 04:51:17,851 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 44 transitions. Word has length 8 [2023-11-29 04:51:17,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:51:17,851 INFO L495 AbstractCegarLoop]: Abstraction has 41 states and 44 transitions. [2023-11-29 04:51:17,852 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 10 states have internal predecessors, (22), 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) [2023-11-29 04:51:17,852 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 44 transitions. [2023-11-29 04:51:17,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 04:51:17,852 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:51:17,852 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2023-11-29 04:51:17,857 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 04:51:18,056 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:18,057 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-29 04:51:18,057 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:51:18,057 INFO L85 PathProgramCache]: Analyzing trace with hash -307219764, now seen corresponding path program 2 times [2023-11-29 04:51:18,057 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:51:18,057 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1438505210] [2023-11-29 04:51:18,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:18,058 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:51:18,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:18,244 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:51:18,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:51:18,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1438505210] [2023-11-29 04:51:18,245 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1438505210] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:51:18,245 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [897399490] [2023-11-29 04:51:18,245 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:51:18,245 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:18,245 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:51:18,246 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:51:18,256 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 04:51:18,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:51:18,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:51:18,314 INFO L262 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-29 04:51:18,316 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:51:18,339 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 [2023-11-29 04:51:18,343 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:51:18,345 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 [2023-11-29 04:51:18,470 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:51:18,471 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:51:18,654 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:51:18,654 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [897399490] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:51:18,654 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:51:18,654 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 14 [2023-11-29 04:51:18,655 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898227724] [2023-11-29 04:51:18,655 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:51:18,655 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 04:51:18,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:51:18,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 04:51:18,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=162, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:51:18,657 INFO L87 Difference]: Start difference. First operand 41 states and 44 transitions. Second operand has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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) [2023-11-29 04:51:18,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:51:18,916 INFO L93 Difference]: Finished difference Result 54 states and 60 transitions. [2023-11-29 04:51:18,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 04:51:18,917 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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 11 [2023-11-29 04:51:18,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:51:18,918 INFO L225 Difference]: With dead ends: 54 [2023-11-29 04:51:18,918 INFO L226 Difference]: Without dead ends: 54 [2023-11-29 04:51:18,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=142, Invalid=238, Unknown=0, NotChecked=0, Total=380 [2023-11-29 04:51:18,919 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 25 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 222 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 222 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 04:51:18,920 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 88 Invalid, 225 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 222 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 04:51:18,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-29 04:51:18,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2023-11-29 04:51:18,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 41 states have (on average 1.3658536585365855) internal successors, (56), 49 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) [2023-11-29 04:51:18,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 56 transitions. [2023-11-29 04:51:18,925 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 56 transitions. Word has length 11 [2023-11-29 04:51:18,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:51:18,925 INFO L495 AbstractCegarLoop]: Abstraction has 50 states and 56 transitions. [2023-11-29 04:51:18,926 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.066666666666667) internal successors, (31), 15 states have internal predecessors, (31), 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) [2023-11-29 04:51:18,926 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 56 transitions. [2023-11-29 04:51:18,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 04:51:18,926 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:51:18,927 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:51:18,937 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 04:51:19,128 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:19,129 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-29 04:51:19,129 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:51:19,129 INFO L85 PathProgramCache]: Analyzing trace with hash 900709704, now seen corresponding path program 1 times [2023-11-29 04:51:19,129 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:51:19,129 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [977084449] [2023-11-29 04:51:19,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:19,129 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:51:19,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:19,198 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-29 04:51:19,198 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:51:19,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [977084449] [2023-11-29 04:51:19,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [977084449] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:51:19,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 04:51:19,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-29 04:51:19,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [863177659] [2023-11-29 04:51:19,199 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:51:19,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 04:51:19,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:51:19,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 04:51:19,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:51:19,201 INFO L87 Difference]: Start difference. First operand 50 states and 56 transitions. Second operand has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2023-11-29 04:51:19,220 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:51:19,220 INFO L93 Difference]: Finished difference Result 48 states and 54 transitions. [2023-11-29 04:51:19,221 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 04:51:19,222 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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 19 [2023-11-29 04:51:19,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:51:19,222 INFO L225 Difference]: With dead ends: 48 [2023-11-29 04:51:19,223 INFO L226 Difference]: Without dead ends: 48 [2023-11-29 04:51:19,223 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 04:51:19,224 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 18 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 16 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 [2023-11-29 04:51:19,224 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 16 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:51:19,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-29 04:51:19,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 48. [2023-11-29 04:51:19,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 41 states have (on average 1.3170731707317074) internal successors, (54), 47 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) [2023-11-29 04:51:19,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2023-11-29 04:51:19,229 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 19 [2023-11-29 04:51:19,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:51:19,230 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2023-11-29 04:51:19,230 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.5) internal successors, (9), 2 states have internal predecessors, (9), 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) [2023-11-29 04:51:19,230 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2023-11-29 04:51:19,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 04:51:19,231 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:51:19,231 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:51:19,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 04:51:19,232 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-29 04:51:19,232 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:51:19,232 INFO L85 PathProgramCache]: Analyzing trace with hash 900709705, now seen corresponding path program 1 times [2023-11-29 04:51:19,232 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:51:19,232 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743136896] [2023-11-29 04:51:19,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:19,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:51:19,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:19,344 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:51:19,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:51:19,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743136896] [2023-11-29 04:51:19,345 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743136896] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:51:19,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156640915] [2023-11-29 04:51:19,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:19,345 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:19,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:51:19,346 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:51:19,352 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 04:51:19,421 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:19,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 137 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-29 04:51:19,424 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:51:19,455 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:51:19,455 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:51:19,564 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:51:19,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [156640915] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:51:19,564 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:51:19,564 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-11-29 04:51:19,564 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609887969] [2023-11-29 04:51:19,564 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:51:19,565 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 04:51:19,565 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:51:19,566 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 04:51:19,566 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:51:19,566 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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) [2023-11-29 04:51:19,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:51:19,944 INFO L93 Difference]: Finished difference Result 348 states and 364 transitions. [2023-11-29 04:51:19,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 04:51:19,945 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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) Word has length 19 [2023-11-29 04:51:19,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:51:19,947 INFO L225 Difference]: With dead ends: 348 [2023-11-29 04:51:19,947 INFO L226 Difference]: Without dead ends: 348 [2023-11-29 04:51:19,948 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=136, Invalid=136, Unknown=0, NotChecked=0, Total=272 [2023-11-29 04:51:19,948 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 856 mSDsluCounter, 135 mSDsCounter, 0 mSdLazyCounter, 234 mSolverCounterSat, 148 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 856 SdHoareTripleChecker+Valid, 147 SdHoareTripleChecker+Invalid, 382 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 148 IncrementalHoareTripleChecker+Valid, 234 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 04:51:19,949 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [856 Valid, 147 Invalid, 382 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [148 Valid, 234 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 04:51:19,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 348 states. [2023-11-29 04:51:19,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 348 to 55. [2023-11-29 04:51:19,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 48 states have (on average 1.25) internal successors, (60), 54 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) [2023-11-29 04:51:19,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 60 transitions. [2023-11-29 04:51:19,957 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 60 transitions. Word has length 19 [2023-11-29 04:51:19,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:51:19,958 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 60 transitions. [2023-11-29 04:51:19,958 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 2.1176470588235294) internal successors, (36), 16 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) [2023-11-29 04:51:19,958 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 60 transitions. [2023-11-29 04:51:19,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 04:51:19,959 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:51:19,959 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 1, 1] [2023-11-29 04:51:19,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 04:51:20,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-29 04:51:20,164 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-29 04:51:20,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:51:20,164 INFO L85 PathProgramCache]: Analyzing trace with hash -1957347900, now seen corresponding path program 3 times [2023-11-29 04:51:20,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:51:20,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [591674050] [2023-11-29 04:51:20,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:20,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:51:20,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:20,563 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 0 proven. 110 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:51:20,564 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:51:20,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [591674050] [2023-11-29 04:51:20,564 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [591674050] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:51:20,564 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [628477026] [2023-11-29 04:51:20,564 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:51:20,564 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:20,564 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:51:20,566 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:51:20,572 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 04:51:20,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:51:20,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:51:20,635 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 04:51:20,638 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:51:20,653 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 [2023-11-29 04:51:20,656 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 04:51:20,658 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 [2023-11-29 04:51:20,797 INFO L134 CoverageAnalysis]: Checked inductivity of 110 backedges. 20 proven. 0 refuted. 0 times theorem prover too weak. 90 trivial. 0 not checked. [2023-11-29 04:51:20,797 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:51:20,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [628477026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:51:20,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:51:20,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [11] total 14 [2023-11-29 04:51:20,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814546583] [2023-11-29 04:51:20,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:51:20,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 04:51:20,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:51:20,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 04:51:20,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:51:20,799 INFO L87 Difference]: Start difference. First operand 55 states and 60 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2023-11-29 04:51:20,834 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:51:20,834 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2023-11-29 04:51:20,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 04:51:20,835 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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 23 [2023-11-29 04:51:20,835 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:51:20,836 INFO L225 Difference]: With dead ends: 54 [2023-11-29 04:51:20,836 INFO L226 Difference]: Without dead ends: 54 [2023-11-29 04:51:20,836 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=63, Invalid=177, Unknown=0, NotChecked=0, Total=240 [2023-11-29 04:51:20,837 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 22 mSDsluCounter, 9 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 38 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:51:20,837 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 21 Invalid, 38 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:51:20,838 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2023-11-29 04:51:20,840 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2023-11-29 04:51:20,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 48 states have (on average 1.1666666666666667) 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) [2023-11-29 04:51:20,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2023-11-29 04:51:20,841 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 23 [2023-11-29 04:51:20,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:51:20,842 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2023-11-29 04:51:20,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 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) [2023-11-29 04:51:20,842 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2023-11-29 04:51:20,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 04:51:20,843 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:51:20,843 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:51:20,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 04:51:21,047 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:21,048 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-29 04:51:21,048 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:51:21,048 INFO L85 PathProgramCache]: Analyzing trace with hash -13433879, now seen corresponding path program 2 times [2023-11-29 04:51:21,048 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:51:21,048 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690559768] [2023-11-29 04:51:21,048 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:21,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:51:21,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:21,348 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:51:21,348 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:51:21,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690559768] [2023-11-29 04:51:21,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690559768] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:51:21,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1927745600] [2023-11-29 04:51:21,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:51:21,349 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:21,349 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:51:21,350 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:51:21,364 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 04:51:21,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 04:51:21,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:51:21,428 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 7 conjunts are in the unsatisfiable core [2023-11-29 04:51:21,431 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:51:21,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 04:51:21,592 INFO L134 CoverageAnalysis]: Checked inductivity of 196 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 196 trivial. 0 not checked. [2023-11-29 04:51:21,593 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:51:21,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1927745600] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:51:21,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:51:21,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [16] total 18 [2023-11-29 04:51:21,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959671273] [2023-11-29 04:51:21,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:51:21,594 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:51:21,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:51:21,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:51:21,595 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:51:21,595 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-29 04:51:21,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:51:21,633 INFO L93 Difference]: Finished difference Result 67 states and 71 transitions. [2023-11-29 04:51:21,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:51:21,634 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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 35 [2023-11-29 04:51:21,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:51:21,635 INFO L225 Difference]: With dead ends: 67 [2023-11-29 04:51:21,635 INFO L226 Difference]: Without dead ends: 67 [2023-11-29 04:51:21,635 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=156, Invalid=186, Unknown=0, NotChecked=0, Total=342 [2023-11-29 04:51:21,636 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 44 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:51:21,636 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 19 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 04:51:21,637 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-29 04:51:21,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 59. [2023-11-29 04:51:21,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 53 states have (on average 1.1886792452830188) internal successors, (63), 58 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 04:51:21,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 63 transitions. [2023-11-29 04:51:21,640 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 63 transitions. Word has length 35 [2023-11-29 04:51:21,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:51:21,641 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 63 transitions. [2023-11-29 04:51:21,641 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 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) [2023-11-29 04:51:21,641 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 63 transitions. [2023-11-29 04:51:21,642 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 04:51:21,642 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:51:21,642 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:51:21,647 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 04:51:21,847 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:21,848 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-29 04:51:21,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:51:21,848 INFO L85 PathProgramCache]: Analyzing trace with hash -416448548, now seen corresponding path program 1 times [2023-11-29 04:51:21,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:51:21,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252206758] [2023-11-29 04:51:21,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:21,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:51:21,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:22,162 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:51:22,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:51:22,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252206758] [2023-11-29 04:51:22,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252206758] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:51:22,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1863025356] [2023-11-29 04:51:22,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:22,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:22,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:51:22,165 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:51:22,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 04:51:22,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:22,279 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 04:51:22,281 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:51:22,337 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:51:22,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:51:22,687 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 0 proven. 196 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:51:22,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1863025356] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:51:22,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:51:22,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16, 16] total 32 [2023-11-29 04:51:22,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1222760474] [2023-11-29 04:51:22,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:51:22,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 33 states [2023-11-29 04:51:22,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:51:22,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 33 interpolants. [2023-11-29 04:51:22,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 04:51:22,690 INFO L87 Difference]: Start difference. First operand 59 states and 63 transitions. Second operand has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 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) [2023-11-29 04:51:23,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:51:23,548 INFO L93 Difference]: Finished difference Result 710 states and 742 transitions. [2023-11-29 04:51:23,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 04:51:23,549 INFO L78 Accepts]: Start accepts. Automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 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 36 [2023-11-29 04:51:23,549 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:51:23,553 INFO L225 Difference]: With dead ends: 710 [2023-11-29 04:51:23,553 INFO L226 Difference]: Without dead ends: 710 [2023-11-29 04:51:23,554 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 55 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=528, Invalid=528, Unknown=0, NotChecked=0, Total=1056 [2023-11-29 04:51:23,555 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 1430 mSDsluCounter, 270 mSDsCounter, 0 mSdLazyCounter, 438 mSolverCounterSat, 274 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1430 SdHoareTripleChecker+Valid, 282 SdHoareTripleChecker+Invalid, 712 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 274 IncrementalHoareTripleChecker+Valid, 438 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 04:51:23,555 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1430 Valid, 282 Invalid, 712 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [274 Valid, 438 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 04:51:23,556 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 710 states. [2023-11-29 04:51:23,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 710 to 91. [2023-11-29 04:51:23,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 85 states have (on average 1.1176470588235294) internal successors, (95), 90 states have internal predecessors, (95), 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) [2023-11-29 04:51:23,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 95 transitions. [2023-11-29 04:51:23,564 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 95 transitions. Word has length 36 [2023-11-29 04:51:23,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:51:23,565 INFO L495 AbstractCegarLoop]: Abstraction has 91 states and 95 transitions. [2023-11-29 04:51:23,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 33 states, 33 states have (on average 2.090909090909091) internal successors, (69), 32 states have internal predecessors, (69), 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) [2023-11-29 04:51:23,565 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 95 transitions. [2023-11-29 04:51:23,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 04:51:23,567 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:51:23,568 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:51:23,572 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 04:51:23,772 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-29 04:51:23,773 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-29 04:51:23,773 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:51:23,773 INFO L85 PathProgramCache]: Analyzing trace with hash 1231313564, now seen corresponding path program 2 times [2023-11-29 04:51:23,773 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:51:23,773 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [288125323] [2023-11-29 04:51:23,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:23,773 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:51:23,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:24,596 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:51:24,596 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:51:24,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [288125323] [2023-11-29 04:51:24,596 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [288125323] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:51:24,596 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1266573201] [2023-11-29 04:51:24,596 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:51:24,596 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:24,597 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:51:24,597 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:51:24,598 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 04:51:24,733 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 04:51:24,733 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:51:24,736 INFO L262 TraceCheckSpWp]: Trace formula consists of 459 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 04:51:24,739 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:51:24,839 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:51:24,839 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:51:25,934 INFO L134 CoverageAnalysis]: Checked inductivity of 901 backedges. 0 proven. 900 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:51:25,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1266573201] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:51:25,935 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:51:25,935 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 64 [2023-11-29 04:51:25,935 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1130906935] [2023-11-29 04:51:25,935 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:51:25,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-29 04:51:25,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:51:25,938 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-29 04:51:25,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 04:51:25,939 INFO L87 Difference]: Start difference. First operand 91 states and 95 transitions. Second operand has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 states have internal predecessors, (133), 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) [2023-11-29 04:51:29,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:51:29,573 INFO L93 Difference]: Finished difference Result 1446 states and 1510 transitions. [2023-11-29 04:51:29,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-29 04:51:29,574 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 states have internal predecessors, (133), 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 68 [2023-11-29 04:51:29,574 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:51:29,579 INFO L225 Difference]: With dead ends: 1446 [2023-11-29 04:51:29,579 INFO L226 Difference]: Without dead ends: 1446 [2023-11-29 04:51:29,580 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 166 GetRequests, 103 SyntacticMatches, 0 SemanticMatches, 63 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=2080, Invalid=2080, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 04:51:29,581 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 2916 mSDsluCounter, 567 mSDsCounter, 0 mSdLazyCounter, 905 mSolverCounterSat, 496 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2916 SdHoareTripleChecker+Valid, 579 SdHoareTripleChecker+Invalid, 1401 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 496 IncrementalHoareTripleChecker+Valid, 905 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:51:29,581 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2916 Valid, 579 Invalid, 1401 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [496 Valid, 905 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 04:51:29,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1446 states. [2023-11-29 04:51:29,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1446 to 155. [2023-11-29 04:51:29,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 155 states, 149 states have (on average 1.0671140939597314) internal successors, (159), 154 states have internal predecessors, (159), 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) [2023-11-29 04:51:29,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 159 transitions. [2023-11-29 04:51:29,592 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 159 transitions. Word has length 68 [2023-11-29 04:51:29,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:51:29,592 INFO L495 AbstractCegarLoop]: Abstraction has 155 states and 159 transitions. [2023-11-29 04:51:29,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.046153846153846) internal successors, (133), 64 states have internal predecessors, (133), 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) [2023-11-29 04:51:29,593 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 159 transitions. [2023-11-29 04:51:29,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 133 [2023-11-29 04:51:29,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:51:29,595 INFO L195 NwaCegarLoop]: trace histogram [62, 62, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:51:29,600 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 04:51:29,795 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:29,795 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-29 04:51:29,796 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:51:29,796 INFO L85 PathProgramCache]: Analyzing trace with hash 2038501404, now seen corresponding path program 3 times [2023-11-29 04:51:29,796 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:51:29,796 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143408229] [2023-11-29 04:51:29,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:29,796 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:51:29,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:33,089 INFO L134 CoverageAnalysis]: Checked inductivity of 3845 backedges. 0 proven. 3844 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 04:51:33,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:51:33,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143408229] [2023-11-29 04:51:33,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143408229] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:51:33,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284747194] [2023-11-29 04:51:33,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 04:51:33,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:33,090 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:51:33,090 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:51:33,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 04:51:33,200 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-29 04:51:33,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:51:33,201 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-29 04:51:33,206 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:51:33,481 INFO L134 CoverageAnalysis]: Checked inductivity of 3845 backedges. 62 proven. 1 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2023-11-29 04:51:33,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:51:33,701 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 [2023-11-29 04:51:33,863 INFO L134 CoverageAnalysis]: Checked inductivity of 3845 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 3782 trivial. 0 not checked. [2023-11-29 04:51:33,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284747194] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:51:33,863 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:51:33,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [64, 5, 5] total 74 [2023-11-29 04:51:33,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133880507] [2023-11-29 04:51:33,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:51:33,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 75 states [2023-11-29 04:51:33,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:51:33,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 75 interpolants. [2023-11-29 04:51:33,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2314, Invalid=3236, Unknown=0, NotChecked=0, Total=5550 [2023-11-29 04:51:33,867 INFO L87 Difference]: Start difference. First operand 155 states and 159 transitions. Second operand has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 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) [2023-11-29 04:51:41,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:51:41,017 INFO L93 Difference]: Finished difference Result 1371 states and 1440 transitions. [2023-11-29 04:51:41,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 131 states. [2023-11-29 04:51:41,018 INFO L78 Accepts]: Start accepts. Automaton has has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 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 132 [2023-11-29 04:51:41,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:51:41,024 INFO L225 Difference]: With dead ends: 1371 [2023-11-29 04:51:41,024 INFO L226 Difference]: Without dead ends: 1371 [2023-11-29 04:51:41,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 253 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2855 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=6986, Invalid=12196, Unknown=0, NotChecked=0, Total=19182 [2023-11-29 04:51:41,031 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 8825 mSDsluCounter, 533 mSDsCounter, 0 mSdLazyCounter, 924 mSolverCounterSat, 1068 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8825 SdHoareTripleChecker+Valid, 551 SdHoareTripleChecker+Invalid, 1992 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1068 IncrementalHoareTripleChecker+Valid, 924 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 04:51:41,031 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8825 Valid, 551 Invalid, 1992 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1068 Valid, 924 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 04:51:41,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1371 states. [2023-11-29 04:51:41,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1371 to 792. [2023-11-29 04:51:41,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 792 states, 786 states have (on average 1.4147582697201018) internal successors, (1112), 791 states have internal predecessors, (1112), 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) [2023-11-29 04:51:41,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 792 states to 792 states and 1112 transitions. [2023-11-29 04:51:41,054 INFO L78 Accepts]: Start accepts. Automaton has 792 states and 1112 transitions. Word has length 132 [2023-11-29 04:51:41,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:51:41,055 INFO L495 AbstractCegarLoop]: Abstraction has 792 states and 1112 transitions. [2023-11-29 04:51:41,055 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 75 states, 75 states have (on average 2.0533333333333332) internal successors, (154), 74 states have internal predecessors, (154), 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) [2023-11-29 04:51:41,056 INFO L276 IsEmpty]: Start isEmpty. Operand 792 states and 1112 transitions. [2023-11-29 04:51:41,058 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 137 [2023-11-29 04:51:41,058 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:51:41,058 INFO L195 NwaCegarLoop]: trace histogram [63, 63, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:51:41,064 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 04:51:41,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 04:51:41,264 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-29 04:51:41,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:51:41,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1276638244, now seen corresponding path program 1 times [2023-11-29 04:51:41,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:51:41,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728329029] [2023-11-29 04:51:41,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:41,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:51:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:43,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:51:43,560 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:51:43,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728329029] [2023-11-29 04:51:43,560 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728329029] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:51:43,560 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882295420] [2023-11-29 04:51:43,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:51:43,560 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:51:43,560 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:51:43,561 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:51:43,562 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 04:51:43,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:51:43,796 INFO L262 TraceCheckSpWp]: Trace formula consists of 890 conjuncts, 65 conjunts are in the unsatisfiable core [2023-11-29 04:51:43,801 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:51:43,967 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:51:43,967 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:51:47,935 INFO L134 CoverageAnalysis]: Checked inductivity of 3969 backedges. 0 proven. 3969 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:51:47,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [882295420] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:51:47,936 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:51:47,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 130 [2023-11-29 04:51:47,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1992259923] [2023-11-29 04:51:47,936 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:51:47,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 131 states [2023-11-29 04:51:47,937 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:51:47,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 131 interpolants. [2023-11-29 04:51:47,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2023-11-29 04:51:47,945 INFO L87 Difference]: Start difference. First operand 792 states and 1112 transitions. Second operand has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 130 states have internal predecessors, (267), 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) [2023-11-29 04:52:13,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:52:13,241 INFO L93 Difference]: Finished difference Result 2836 states and 2966 transitions. [2023-11-29 04:52:13,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 130 states. [2023-11-29 04:52:13,242 INFO L78 Accepts]: Start accepts. Automaton has has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 130 states have internal predecessors, (267), 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 136 [2023-11-29 04:52:13,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:52:13,252 INFO L225 Difference]: With dead ends: 2836 [2023-11-29 04:52:13,252 INFO L226 Difference]: Without dead ends: 2836 [2023-11-29 04:52:13,255 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 335 GetRequests, 206 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 252 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=8515, Invalid=8515, Unknown=0, NotChecked=0, Total=17030 [2023-11-29 04:52:13,255 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 11096 mSDsluCounter, 1161 mSDsCounter, 0 mSdLazyCounter, 1701 mSolverCounterSat, 1502 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11096 SdHoareTripleChecker+Valid, 1173 SdHoareTripleChecker+Invalid, 3203 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1502 IncrementalHoareTripleChecker+Valid, 1701 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-29 04:52:13,256 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11096 Valid, 1173 Invalid, 3203 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1502 Valid, 1701 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-29 04:52:13,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2836 states. [2023-11-29 04:52:13,279 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2836 to 922. [2023-11-29 04:52:13,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 922 states, 916 states have (on average 1.3558951965065502) internal successors, (1242), 921 states have internal predecessors, (1242), 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) [2023-11-29 04:52:13,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 922 states to 922 states and 1242 transitions. [2023-11-29 04:52:13,283 INFO L78 Accepts]: Start accepts. Automaton has 922 states and 1242 transitions. Word has length 136 [2023-11-29 04:52:13,283 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:52:13,283 INFO L495 AbstractCegarLoop]: Abstraction has 922 states and 1242 transitions. [2023-11-29 04:52:13,284 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 131 states, 131 states have (on average 2.0381679389312977) internal successors, (267), 130 states have internal predecessors, (267), 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) [2023-11-29 04:52:13,284 INFO L276 IsEmpty]: Start isEmpty. Operand 922 states and 1242 transitions. [2023-11-29 04:52:13,288 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 267 [2023-11-29 04:52:13,288 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:52:13,289 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 04:52:13,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 04:52:13,492 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2023-11-29 04:52:13,492 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr15ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-29 04:52:13,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:52:13,493 INFO L85 PathProgramCache]: Analyzing trace with hash -1338668792, now seen corresponding path program 2 times [2023-11-29 04:52:13,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:52:13,493 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169579141] [2023-11-29 04:52:13,493 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:52:13,493 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:52:13,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:52:22,973 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 0 proven. 16384 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 04:52:22,973 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:52:22,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169579141] [2023-11-29 04:52:22,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1169579141] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:52:22,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905446510] [2023-11-29 04:52:22,974 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:52:22,974 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:52:22,974 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:52:22,975 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:52:22,976 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 04:52:23,134 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 04:52:23,135 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:52:23,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 71 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:52:23,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:52:24,541 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_ULTIMATE.start_main_~#src~0#1.base_31| Int) (|v_ULTIMATE.start_main_~#dst~0#1.base_18| Int)) (and (= (select (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_31| 1) |v_ULTIMATE.start_main_~#dst~0#1.base_18|) 0) (= |c_#valid| (store (store |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_31| 0) |v_ULTIMATE.start_main_~#dst~0#1.base_18| 0)) (= (select |c_ULTIMATE.start_main_old_#valid#1| |v_ULTIMATE.start_main_~#src~0#1.base_31|) 0))) is different from true [2023-11-29 04:52:24,549 INFO L134 CoverageAnalysis]: Checked inductivity of 16384 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 16384 trivial. 0 not checked. [2023-11-29 04:52:24,549 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 04:52:24,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1905446510] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 04:52:24,549 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 04:52:24,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [130] total 132 [2023-11-29 04:52:24,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927442232] [2023-11-29 04:52:24,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 04:52:24,550 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 04:52:24,550 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:52:24,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 04:52:24,551 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8519, Invalid=8776, Unknown=1, NotChecked=260, Total=17556 [2023-11-29 04:52:24,551 INFO L87 Difference]: Start difference. First operand 922 states and 1242 transitions. Second operand has 4 states, 3 states have (on average 4.0) 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) [2023-11-29 04:52:24,577 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:52:24,577 INFO L93 Difference]: Finished difference Result 921 states and 1241 transitions. [2023-11-29 04:52:24,578 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 04:52:24,578 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 4.0) 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 266 [2023-11-29 04:52:24,578 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:52:24,583 INFO L225 Difference]: With dead ends: 921 [2023-11-29 04:52:24,583 INFO L226 Difference]: Without dead ends: 919 [2023-11-29 04:52:24,584 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 395 GetRequests, 264 SyntacticMatches, 0 SemanticMatches, 131 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=8519, Invalid=8776, Unknown=1, NotChecked=260, Total=17556 [2023-11-29 04:52:24,585 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 15 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 12 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 25 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 04:52:24,585 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 12 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 15 Invalid, 0 Unknown, 25 Unchecked, 0.0s Time] [2023-11-29 04:52:24,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 919 states. [2023-11-29 04:52:24,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 919 to 919. [2023-11-29 04:52:24,601 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 919 states, 914 states have (on average 1.285557986870897) internal successors, (1175), 918 states have internal predecessors, (1175), 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) [2023-11-29 04:52:24,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 919 states to 919 states and 1175 transitions. [2023-11-29 04:52:24,603 INFO L78 Accepts]: Start accepts. Automaton has 919 states and 1175 transitions. Word has length 266 [2023-11-29 04:52:24,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:52:24,604 INFO L495 AbstractCegarLoop]: Abstraction has 919 states and 1175 transitions. [2023-11-29 04:52:24,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 4.0) 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) [2023-11-29 04:52:24,604 INFO L276 IsEmpty]: Start isEmpty. Operand 919 states and 1175 transitions. [2023-11-29 04:52:24,607 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 268 [2023-11-29 04:52:24,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:52:24,608 INFO L195 NwaCegarLoop]: trace histogram [128, 128, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-29 04:52:24,613 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 04:52:24,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 04:52:24,808 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-29 04:52:24,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:52:24,809 INFO L85 PathProgramCache]: Analyzing trace with hash -1315561837, now seen corresponding path program 1 times [2023-11-29 04:52:24,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:52:24,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2015189697] [2023-11-29 04:52:24,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:52:24,809 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:52:24,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:52:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 16388 backedges. 0 proven. 16384 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 04:52:33,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:52:33,925 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2015189697] [2023-11-29 04:52:33,925 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2015189697] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:52:33,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [820425759] [2023-11-29 04:52:33,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:52:33,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:52:33,926 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:52:33,927 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:52:33,928 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 04:52:34,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:52:34,254 INFO L262 TraceCheckSpWp]: Trace formula consists of 1746 conjuncts, 130 conjunts are in the unsatisfiable core [2023-11-29 04:52:34,260 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:52:34,548 INFO L134 CoverageAnalysis]: Checked inductivity of 16388 backedges. 0 proven. 16384 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 04:52:34,548 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:52:50,280 INFO L134 CoverageAnalysis]: Checked inductivity of 16388 backedges. 0 proven. 16384 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 04:52:50,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [820425759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:52:50,281 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:52:50,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [130, 130, 130] total 260 [2023-11-29 04:52:50,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [911187002] [2023-11-29 04:52:50,281 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:52:50,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 261 states [2023-11-29 04:52:50,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:52:50,287 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 261 interpolants. [2023-11-29 04:52:50,291 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33930, Invalid=33930, Unknown=0, NotChecked=0, Total=67860 [2023-11-29 04:52:50,292 INFO L87 Difference]: Start difference. First operand 919 states and 1175 transitions. Second operand has 261 states, 261 states have (on average 2.0114942528735633) internal successors, (525), 260 states have internal predecessors, (525), 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) [2023-11-29 04:57:50,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 04:57:50,328 INFO L93 Difference]: Finished difference Result 5049 states and 5309 transitions. [2023-11-29 04:57:50,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 260 states. [2023-11-29 04:57:50,329 INFO L78 Accepts]: Start accepts. Automaton has has 261 states, 261 states have (on average 2.0114942528735633) internal successors, (525), 260 states have internal predecessors, (525), 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 267 [2023-11-29 04:57:50,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 04:57:50,348 INFO L225 Difference]: With dead ends: 5049 [2023-11-29 04:57:50,348 INFO L226 Difference]: Without dead ends: 5049 [2023-11-29 04:57:50,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 403 SyntacticMatches, 0 SemanticMatches, 259 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 512 ImplicationChecksByTransitivity, 20.6s TimeCoverageRelationStatistics Valid=33930, Invalid=33930, Unknown=0, NotChecked=0, Total=67860 [2023-11-29 04:57:50,353 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 18124 mSDsluCounter, 1548 mSDsCounter, 0 mSdLazyCounter, 3521 mSolverCounterSat, 3630 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18124 SdHoareTripleChecker+Valid, 1557 SdHoareTripleChecker+Invalid, 7151 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 3630 IncrementalHoareTripleChecker+Valid, 3521 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.1s IncrementalHoareTripleChecker+Time [2023-11-29 04:57:50,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18124 Valid, 1557 Invalid, 7151 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [3630 Valid, 3521 Invalid, 0 Unknown, 0 Unchecked, 6.1s Time] [2023-11-29 04:57:50,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5049 states. [2023-11-29 04:57:50,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5049 to 1179. [2023-11-29 04:57:50,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1174 states have (on average 1.2223168654173764) internal successors, (1435), 1178 states have internal predecessors, (1435), 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) [2023-11-29 04:57:50,399 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1435 transitions. [2023-11-29 04:57:50,399 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1435 transitions. Word has length 267 [2023-11-29 04:57:50,399 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 04:57:50,399 INFO L495 AbstractCegarLoop]: Abstraction has 1179 states and 1435 transitions. [2023-11-29 04:57:50,400 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 261 states, 261 states have (on average 2.0114942528735633) internal successors, (525), 260 states have internal predecessors, (525), 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) [2023-11-29 04:57:50,400 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1435 transitions. [2023-11-29 04:57:50,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 528 [2023-11-29 04:57:50,404 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 04:57:50,404 INFO L195 NwaCegarLoop]: trace histogram [258, 258, 2, 2, 2, 1, 1, 1, 1, 1] [2023-11-29 04:57:50,413 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 04:57:50,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 04:57:50,608 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-29 04:57:50,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 04:57:50,609 INFO L85 PathProgramCache]: Analyzing trace with hash -2034130885, now seen corresponding path program 2 times [2023-11-29 04:57:50,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 04:57:50,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944468698] [2023-11-29 04:57:50,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 04:57:50,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 04:57:51,187 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 04:58:31,253 INFO L134 CoverageAnalysis]: Checked inductivity of 66568 backedges. 0 proven. 66564 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 04:58:31,253 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 04:58:31,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944468698] [2023-11-29 04:58:31,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944468698] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 04:58:31,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1723007797] [2023-11-29 04:58:31,253 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 04:58:31,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 04:58:31,254 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 04:58:31,254 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 04:58:31,255 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 04:58:31,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 1 check-sat command(s) [2023-11-29 04:58:31,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 04:58:31,582 INFO L262 TraceCheckSpWp]: Trace formula consists of 59 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-29 04:58:31,590 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 04:58:31,597 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 [2023-11-29 04:58:31,606 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 [2023-11-29 04:58:36,402 INFO L134 CoverageAnalysis]: Checked inductivity of 66568 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 66565 trivial. 0 not checked. [2023-11-29 04:58:36,402 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 04:58:45,249 INFO L134 CoverageAnalysis]: Checked inductivity of 66568 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 66565 trivial. 0 not checked. [2023-11-29 04:58:45,250 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1723007797] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 04:58:45,250 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 04:58:45,250 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [260, 2, 2] total 264 [2023-11-29 04:58:45,250 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903224884] [2023-11-29 04:58:45,250 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 04:58:45,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 265 states [2023-11-29 04:58:45,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 04:58:45,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 265 interpolants. [2023-11-29 04:58:45,258 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33940, Invalid=36020, Unknown=0, NotChecked=0, Total=69960 [2023-11-29 04:58:45,259 INFO L87 Difference]: Start difference. First operand 1179 states and 1435 transitions. Second operand has 265 states, 265 states have (on average 2.0754716981132075) internal successors, (550), 264 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) [2023-11-29 04:58:49,293 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 05:04:26,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:04:26,601 INFO L93 Difference]: Finished difference Result 4559 states and 4821 transitions. [2023-11-29 05:04:26,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 523 states. [2023-11-29 05:04:26,602 INFO L78 Accepts]: Start accepts. Automaton has has 265 states, 265 states have (on average 2.0754716981132075) internal successors, (550), 264 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) Word has length 527 [2023-11-29 05:04:26,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:04:26,616 INFO L225 Difference]: With dead ends: 4559 [2023-11-29 05:04:26,616 INFO L226 Difference]: Without dead ends: 4559 [2023-11-29 05:04:26,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1832 GetRequests, 1049 SyntacticMatches, 0 SemanticMatches, 783 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135713 ImplicationChecksByTransitivity, 132.5s TimeCoverageRelationStatistics Valid=205410, Invalid=410030, Unknown=0, NotChecked=0, Total=615440 [2023-11-29 05:04:26,650 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 21850 mSDsluCounter, 1554 mSDsCounter, 0 mSdLazyCounter, 3019 mSolverCounterSat, 5485 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 10.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21850 SdHoareTripleChecker+Valid, 1562 SdHoareTripleChecker+Invalid, 8505 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 5485 IncrementalHoareTripleChecker+Valid, 3019 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 12.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:04:26,651 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21850 Valid, 1562 Invalid, 8505 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [5485 Valid, 3019 Invalid, 1 Unknown, 0 Unchecked, 12.0s Time] [2023-11-29 05:04:26,654 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 4559 states. [2023-11-29 05:04:26,672 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 4559 to 1179. [2023-11-29 05:04:26,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1179 states, 1176 states have (on average 1.1130952380952381) internal successors, (1309), 1178 states have internal predecessors, (1309), 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) [2023-11-29 05:04:26,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1179 states to 1179 states and 1309 transitions. [2023-11-29 05:04:26,674 INFO L78 Accepts]: Start accepts. Automaton has 1179 states and 1309 transitions. Word has length 527 [2023-11-29 05:04:26,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:04:26,675 INFO L495 AbstractCegarLoop]: Abstraction has 1179 states and 1309 transitions. [2023-11-29 05:04:26,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 265 states, 265 states have (on average 2.0754716981132075) internal successors, (550), 264 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) [2023-11-29 05:04:26,676 INFO L276 IsEmpty]: Start isEmpty. Operand 1179 states and 1309 transitions. [2023-11-29 05:04:26,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 532 [2023-11-29 05:04:26,678 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:04:26,678 INFO L195 NwaCegarLoop]: trace histogram [259, 259, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:04:26,683 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-29 05:04:26,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 05:04:26,879 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr14ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 13 more)] === [2023-11-29 05:04:26,879 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:04:26,879 INFO L85 PathProgramCache]: Analyzing trace with hash -2141811633, now seen corresponding path program 1 times [2023-11-29 05:04:26,879 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:04:26,879 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [371680993] [2023-11-29 05:04:26,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:04:26,880 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:04:27,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:06,951 INFO L134 CoverageAnalysis]: Checked inductivity of 67081 backedges. 0 proven. 67081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:05:06,952 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:05:06,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [371680993] [2023-11-29 05:05:06,952 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [371680993] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:05:06,952 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593685773] [2023-11-29 05:05:06,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:05:06,952 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:05:06,952 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:05:06,953 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:05:06,953 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1f1aa12a-7a8e-486e-93a4-ddc7e9fd9dfc/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:05:07,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:05:07,694 INFO L262 TraceCheckSpWp]: Trace formula consists of 3449 conjuncts, 261 conjunts are in the unsatisfiable core [2023-11-29 05:05:07,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:05:08,257 INFO L134 CoverageAnalysis]: Checked inductivity of 67081 backedges. 0 proven. 67081 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:05:08,257 INFO L327 TraceCheckSpWp]: Computing backward predicates...