./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 0e0057cc Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/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_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/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_d776f8a6-c160-4795-97ec-bf79717e3b2b/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 382beab9cdcef42f6594628efe520684fdbc8c72ada26cb53ddf4918b8957d49 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 05:33:02,328 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 05:33:02,394 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 05:33:02,399 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 05:33:02,399 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 05:33:02,421 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 05:33:02,422 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 05:33:02,422 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 05:33:02,423 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 05:33:02,424 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 05:33:02,424 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 05:33:02,425 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 05:33:02,425 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 05:33:02,426 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 05:33:02,426 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 05:33:02,427 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 05:33:02,427 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 05:33:02,428 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 05:33:02,428 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 05:33:02,429 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 05:33:02,429 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 05:33:02,431 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 05:33:02,431 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 05:33:02,432 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 05:33:02,432 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 05:33:02,432 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 05:33:02,433 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 05:33:02,433 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 05:33:02,433 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 05:33:02,434 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 05:33:02,434 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 05:33:02,434 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 05:33:02,435 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:33:02,435 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 05:33:02,435 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 05:33:02,435 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 05:33:02,436 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 05:33:02,436 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 05:33:02,436 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 05:33:02,436 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 05:33:02,436 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 05:33:02,437 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_d776f8a6-c160-4795-97ec-bf79717e3b2b/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 382beab9cdcef42f6594628efe520684fdbc8c72ada26cb53ddf4918b8957d49 [2023-11-29 05:33:02,668 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 05:33:02,690 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 05:33:02,693 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 05:33:02,695 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 05:33:02,695 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 05:33:02,696 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2023-11-29 05:33:05,553 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 05:33:05,763 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 05:33:05,764 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/sv-benchmarks/c/array-memsafety/cstrcmp-alloca-2.i [2023-11-29 05:33:05,777 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/data/b5c0340cd/b8aa637b1f5048a1ade0298efe4f229e/FLAGc8399bb6d [2023-11-29 05:33:05,790 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/data/b5c0340cd/b8aa637b1f5048a1ade0298efe4f229e [2023-11-29 05:33:05,792 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 05:33:05,794 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 05:33:05,795 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 05:33:05,795 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 05:33:05,800 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 05:33:05,800 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:33:05" (1/1) ... [2023-11-29 05:33:05,801 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7f5c408 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:05, skipping insertion in model container [2023-11-29 05:33:05,802 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 05:33:05" (1/1) ... [2023-11-29 05:33:05,850 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 05:33:06,136 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:33:06,148 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 05:33:06,190 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 05:33:06,220 INFO L206 MainTranslator]: Completed translation [2023-11-29 05:33:06,221 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:06 WrapperNode [2023-11-29 05:33:06,221 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 05:33:06,222 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 05:33:06,222 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 05:33:06,223 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 05:33:06,230 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:06" (1/1) ... [2023-11-29 05:33:06,243 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:06" (1/1) ... [2023-11-29 05:33:06,268 INFO L138 Inliner]: procedures = 117, calls = 18, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 97 [2023-11-29 05:33:06,268 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 05:33:06,269 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 05:33:06,269 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 05:33:06,269 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 05:33:06,280 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:06" (1/1) ... [2023-11-29 05:33:06,280 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:06" (1/1) ... [2023-11-29 05:33:06,284 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:06" (1/1) ... [2023-11-29 05:33:06,299 INFO L175 MemorySlicer]: Split 9 memory accesses to 2 slices as follows [4, 5]. 56 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0, 0]. The 4 writes are split as follows [2, 2]. [2023-11-29 05:33:06,300 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:06" (1/1) ... [2023-11-29 05:33:06,300 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:06" (1/1) ... [2023-11-29 05:33:06,306 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:06" (1/1) ... [2023-11-29 05:33:06,309 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:06" (1/1) ... [2023-11-29 05:33:06,311 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:06" (1/1) ... [2023-11-29 05:33:06,312 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:06" (1/1) ... [2023-11-29 05:33:06,315 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 05:33:06,316 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 05:33:06,316 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 05:33:06,316 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 05:33:06,317 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:06" (1/1) ... [2023-11-29 05:33:06,323 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 05:33:06,334 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:06,346 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 05:33:06,349 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 05:33:06,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 05:33:06,376 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#1 [2023-11-29 05:33:06,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 05:33:06,376 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#1 [2023-11-29 05:33:06,377 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 05:33:06,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 05:33:06,377 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 05:33:06,377 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 05:33:06,469 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 05:33:06,470 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 05:33:06,719 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 05:33:06,770 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 05:33:06,770 INFO L309 CfgBuilder]: Removed 3 assume(true) statements. [2023-11-29 05:33:06,771 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:33:06 BoogieIcfgContainer [2023-11-29 05:33:06,771 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 05:33:06,774 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 05:33:06,774 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 05:33:06,777 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 05:33:06,777 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 05:33:05" (1/3) ... [2023-11-29 05:33:06,777 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e95e46c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:33:06, skipping insertion in model container [2023-11-29 05:33:06,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 05:33:06" (2/3) ... [2023-11-29 05:33:06,778 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2e95e46c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 05:33:06, skipping insertion in model container [2023-11-29 05:33:06,778 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:33:06" (3/3) ... [2023-11-29 05:33:06,780 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrcmp-alloca-2.i [2023-11-29 05:33:06,797 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 05:33:06,797 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 19 error locations. [2023-11-29 05:33:06,844 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 05:33:06,850 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;@341e1c8f, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 05:33:06,850 INFO L358 AbstractCegarLoop]: Starting to check reachability of 19 error locations. [2023-11-29 05:33:06,854 INFO L276 IsEmpty]: Start isEmpty. Operand has 40 states, 20 states have (on average 2.4) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:06,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 05:33:06,858 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:06,859 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 05:33:06,860 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:06,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:06,865 INFO L85 PathProgramCache]: Analyzing trace with hash -425071452, now seen corresponding path program 1 times [2023-11-29 05:33:06,872 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:06,872 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1512073308] [2023-11-29 05:33:06,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:06,873 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:06,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:07,086 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 05:33:07,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:07,087 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1512073308] [2023-11-29 05:33:07,087 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1512073308] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:07,088 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:07,088 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:33:07,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623942590] [2023-11-29 05:33:07,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:07,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:33:07,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:07,118 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:33:07,119 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:33:07,121 INFO L87 Difference]: Start difference. First operand has 40 states, 20 states have (on average 2.4) internal successors, (48), 39 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 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 05:33:07,213 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:07,213 INFO L93 Difference]: Finished difference Result 74 states and 83 transitions. [2023-11-29 05:33:07,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:33:07,216 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 6 [2023-11-29 05:33:07,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:07,224 INFO L225 Difference]: With dead ends: 74 [2023-11-29 05:33:07,224 INFO L226 Difference]: Without dead ends: 73 [2023-11-29 05:33:07,226 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:33:07,229 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 35 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 88 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:07,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 88 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:33:07,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-29 05:33:07,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 42. [2023-11-29 05:33:07,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 41 states have internal predecessors, (48), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:07,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 48 transitions. [2023-11-29 05:33:07,265 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 48 transitions. Word has length 6 [2023-11-29 05:33:07,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:07,266 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 48 transitions. [2023-11-29 05:33:07,266 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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 05:33:07,266 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 48 transitions. [2023-11-29 05:33:07,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 05:33:07,267 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:07,267 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 05:33:07,268 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 05:33:07,268 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:07,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:07,268 INFO L85 PathProgramCache]: Analyzing trace with hash -423224410, now seen corresponding path program 1 times [2023-11-29 05:33:07,269 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:07,269 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845917533] [2023-11-29 05:33:07,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:07,269 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:07,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:07,426 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 05:33:07,426 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:07,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845917533] [2023-11-29 05:33:07,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [845917533] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:07,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:07,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:33:07,428 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587160836] [2023-11-29 05:33:07,428 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:07,429 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:33:07,429 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:07,430 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:33:07,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:33:07,431 INFO L87 Difference]: Start difference. First operand 42 states and 48 transitions. Second operand has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 05:33:07,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:07,475 INFO L93 Difference]: Finished difference Result 40 states and 46 transitions. [2023-11-29 05:33:07,475 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:33:07,476 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 6 [2023-11-29 05:33:07,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:07,477 INFO L225 Difference]: With dead ends: 40 [2023-11-29 05:33:07,477 INFO L226 Difference]: Without dead ends: 40 [2023-11-29 05:33:07,477 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:33:07,480 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 33 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:07,480 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 27 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:33:07,482 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-29 05:33:07,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 40. [2023-11-29 05:33:07,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 23 states have (on average 2.0) internal successors, (46), 39 states have internal predecessors, (46), 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 05:33:07,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 46 transitions. [2023-11-29 05:33:07,488 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 46 transitions. Word has length 6 [2023-11-29 05:33:07,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:07,488 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 46 transitions. [2023-11-29 05:33:07,488 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.0) internal successors, (6), 3 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 05:33:07,489 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 46 transitions. [2023-11-29 05:33:07,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 05:33:07,489 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:07,490 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 05:33:07,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 05:33:07,490 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:07,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:07,491 INFO L85 PathProgramCache]: Analyzing trace with hash -423224409, now seen corresponding path program 1 times [2023-11-29 05:33:07,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:07,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2068000331] [2023-11-29 05:33:07,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:07,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:07,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:07,749 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 05:33:07,749 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:07,750 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2068000331] [2023-11-29 05:33:07,750 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2068000331] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:07,750 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:07,750 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:33:07,751 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [772319192] [2023-11-29 05:33:07,751 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:07,751 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:33:07,752 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:07,752 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:33:07,753 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:33:07,753 INFO L87 Difference]: Start difference. First operand 40 states and 46 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 05:33:07,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:07,890 INFO L93 Difference]: Finished difference Result 43 states and 50 transitions. [2023-11-29 05:33:07,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:33:07,890 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 6 [2023-11-29 05:33:07,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:07,891 INFO L225 Difference]: With dead ends: 43 [2023-11-29 05:33:07,891 INFO L226 Difference]: Without dead ends: 43 [2023-11-29 05:33:07,892 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:33:07,894 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 43 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 64 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 43 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 65 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 64 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:07,894 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [43 Valid, 61 Invalid, 65 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 64 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:33:07,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-29 05:33:07,899 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2023-11-29 05:33:07,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 25 states have (on average 1.96) internal successors, (49), 41 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:07,900 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 49 transitions. [2023-11-29 05:33:07,901 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 49 transitions. Word has length 6 [2023-11-29 05:33:07,901 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:07,901 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 49 transitions. [2023-11-29 05:33:07,901 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 05:33:07,902 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 49 transitions. [2023-11-29 05:33:07,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 05:33:07,902 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:07,902 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:07,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 05:33:07,903 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:07,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:07,904 INFO L85 PathProgramCache]: Analyzing trace with hash -471822832, now seen corresponding path program 1 times [2023-11-29 05:33:07,904 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:07,904 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856305664] [2023-11-29 05:33:07,904 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:07,905 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:07,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:07,953 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 05:33:07,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:07,954 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856305664] [2023-11-29 05:33:07,954 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856305664] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:07,954 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:07,954 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:33:07,955 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025745145] [2023-11-29 05:33:07,955 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:07,955 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:33:07,956 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:07,956 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:33:07,957 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:33:07,957 INFO L87 Difference]: Start difference. First operand 42 states and 49 transitions. Second operand has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 05:33:08,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:08,010 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2023-11-29 05:33:08,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:33:08,011 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 05:33:08,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:08,012 INFO L225 Difference]: With dead ends: 77 [2023-11-29 05:33:08,012 INFO L226 Difference]: Without dead ends: 77 [2023-11-29 05:33:08,013 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:33:08,014 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 31 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:08,015 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 81 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:33:08,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-29 05:33:08,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 51. [2023-11-29 05:33:08,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 34 states have (on average 1.7941176470588236) internal successors, (61), 50 states have internal predecessors, (61), 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 05:33:08,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 61 transitions. [2023-11-29 05:33:08,022 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 61 transitions. Word has length 8 [2023-11-29 05:33:08,022 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:08,022 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 61 transitions. [2023-11-29 05:33:08,023 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 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 05:33:08,023 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 61 transitions. [2023-11-29 05:33:08,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 05:33:08,023 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:08,024 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:08,024 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 05:33:08,024 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:08,025 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:08,025 INFO L85 PathProgramCache]: Analyzing trace with hash -414564530, now seen corresponding path program 1 times [2023-11-29 05:33:08,025 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:08,025 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1045938991] [2023-11-29 05:33:08,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:08,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:08,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:08,068 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 05:33:08,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:08,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1045938991] [2023-11-29 05:33:08,069 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1045938991] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:08,069 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:08,069 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:33:08,069 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569248316] [2023-11-29 05:33:08,069 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:08,070 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:33:08,070 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:08,071 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:33:08,071 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:33:08,071 INFO L87 Difference]: Start difference. First operand 51 states and 61 transitions. Second operand has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 05:33:08,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:08,106 INFO L93 Difference]: Finished difference Result 49 states and 59 transitions. [2023-11-29 05:33:08,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:33:08,107 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 05:33:08,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:08,108 INFO L225 Difference]: With dead ends: 49 [2023-11-29 05:33:08,108 INFO L226 Difference]: Without dead ends: 49 [2023-11-29 05:33:08,108 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:33:08,110 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 29 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 27 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:08,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 27 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:33:08,112 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-29 05:33:08,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 49. [2023-11-29 05:33:08,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 34 states have (on average 1.7352941176470589) internal successors, (59), 48 states have internal predecessors, (59), 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 05:33:08,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 59 transitions. [2023-11-29 05:33:08,116 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 59 transitions. Word has length 8 [2023-11-29 05:33:08,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:08,117 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 59 transitions. [2023-11-29 05:33:08,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 4.0) internal successors, (8), 3 states have internal predecessors, (8), 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 05:33:08,117 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 59 transitions. [2023-11-29 05:33:08,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 05:33:08,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:08,118 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:08,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 05:33:08,119 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:08,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:08,119 INFO L85 PathProgramCache]: Analyzing trace with hash -414564529, now seen corresponding path program 1 times [2023-11-29 05:33:08,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:08,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [185506939] [2023-11-29 05:33:08,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:08,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:08,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:08,287 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 05:33:08,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:08,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [185506939] [2023-11-29 05:33:08,288 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [185506939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:08,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:08,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:33:08,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1574369038] [2023-11-29 05:33:08,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:08,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:33:08,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:08,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:33:08,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:33:08,290 INFO L87 Difference]: Start difference. First operand 49 states and 59 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 05:33:08,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:08,404 INFO L93 Difference]: Finished difference Result 52 states and 63 transitions. [2023-11-29 05:33:08,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:33:08,405 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 05:33:08,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:08,406 INFO L225 Difference]: With dead ends: 52 [2023-11-29 05:33:08,406 INFO L226 Difference]: Without dead ends: 52 [2023-11-29 05:33:08,406 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:33:08,407 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 39 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 44 SdHoareTripleChecker+Invalid, 76 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:08,408 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 44 Invalid, 76 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:33:08,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-29 05:33:08,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 51. [2023-11-29 05:33:08,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 36 states have (on average 1.7222222222222223) internal successors, (62), 50 states have internal predecessors, (62), 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 05:33:08,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 62 transitions. [2023-11-29 05:33:08,414 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 62 transitions. Word has length 8 [2023-11-29 05:33:08,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:08,414 INFO L495 AbstractCegarLoop]: Abstraction has 51 states and 62 transitions. [2023-11-29 05:33:08,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 5 states have internal predecessors, (8), 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 05:33:08,415 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 62 transitions. [2023-11-29 05:33:08,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 05:33:08,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:08,415 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:08,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 05:33:08,416 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:08,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:08,416 INFO L85 PathProgramCache]: Analyzing trace with hash 1303315612, now seen corresponding path program 1 times [2023-11-29 05:33:08,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:08,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563592191] [2023-11-29 05:33:08,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:08,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:08,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:08,646 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 05:33:08,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:08,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563592191] [2023-11-29 05:33:08,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [563592191] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:08,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [925765497] [2023-11-29 05:33:08,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:08,648 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:08,648 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:08,652 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:08,654 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 05:33:08,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:08,759 INFO L262 TraceCheckSpWp]: Trace formula consists of 63 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-29 05:33:08,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:08,868 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 05:33:08,873 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-29 05:33:08,877 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 05:33:09,005 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 05:33:09,006 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:09,165 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:33:09,181 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 05:33:09,181 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [925765497] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:09,181 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:09,181 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 11 [2023-11-29 05:33:09,182 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [455127696] [2023-11-29 05:33:09,182 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:09,182 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-29 05:33:09,182 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:09,183 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-29 05:33:09,183 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2023-11-29 05:33:09,183 INFO L87 Difference]: Start difference. First operand 51 states and 62 transitions. Second operand has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:09,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:09,465 INFO L93 Difference]: Finished difference Result 52 states and 62 transitions. [2023-11-29 05:33:09,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 05:33:09,466 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-29 05:33:09,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:09,467 INFO L225 Difference]: With dead ends: 52 [2023-11-29 05:33:09,467 INFO L226 Difference]: Without dead ends: 52 [2023-11-29 05:33:09,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:33:09,469 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 40 mSDsluCounter, 105 mSDsCounter, 0 mSdLazyCounter, 183 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 130 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 183 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:09,469 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 130 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 183 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:33:09,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2023-11-29 05:33:09,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 46. [2023-11-29 05:33:09,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 32 states have (on average 1.6875) internal successors, (54), 45 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 05:33:09,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 54 transitions. [2023-11-29 05:33:09,474 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 54 transitions. Word has length 8 [2023-11-29 05:33:09,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:09,474 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 54 transitions. [2023-11-29 05:33:09,475 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 1.75) internal successors, (21), 12 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:09,475 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 54 transitions. [2023-11-29 05:33:09,475 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 05:33:09,475 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:09,475 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:09,482 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 05:33:09,679 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:09,679 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:09,680 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:09,680 INFO L85 PathProgramCache]: Analyzing trace with hash -1741607524, now seen corresponding path program 1 times [2023-11-29 05:33:09,680 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:09,680 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134787104] [2023-11-29 05:33:09,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:09,681 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:09,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:09,792 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 05:33:09,793 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:09,793 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134787104] [2023-11-29 05:33:09,793 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [134787104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:09,793 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:09,793 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:33:09,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345511429] [2023-11-29 05:33:09,793 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:09,794 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:33:09,794 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:09,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:33:09,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:33:09,795 INFO L87 Difference]: Start difference. First operand 46 states and 54 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 05:33:09,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:09,875 INFO L93 Difference]: Finished difference Result 77 states and 88 transitions. [2023-11-29 05:33:09,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:33:09,875 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 9 [2023-11-29 05:33:09,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:09,876 INFO L225 Difference]: With dead ends: 77 [2023-11-29 05:33:09,876 INFO L226 Difference]: Without dead ends: 77 [2023-11-29 05:33:09,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:33:09,877 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 27 mSDsluCounter, 40 mSDsCounter, 0 mSdLazyCounter, 56 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 60 SdHoareTripleChecker+Invalid, 56 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 56 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:09,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 60 Invalid, 56 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 56 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:33:09,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-29 05:33:09,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2023-11-29 05:33:09,882 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 41 states have (on average 1.6097560975609757) internal successors, (66), 54 states have internal predecessors, (66), 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 05:33:09,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 66 transitions. [2023-11-29 05:33:09,883 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 66 transitions. Word has length 9 [2023-11-29 05:33:09,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:09,883 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 66 transitions. [2023-11-29 05:33:09,884 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 4 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 05:33:09,884 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 66 transitions. [2023-11-29 05:33:09,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-29 05:33:09,884 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:09,884 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:09,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 05:33:09,885 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:09,885 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:09,885 INFO L85 PathProgramCache]: Analyzing trace with hash 1744013146, now seen corresponding path program 1 times [2023-11-29 05:33:09,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:09,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [957960489] [2023-11-29 05:33:09,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:09,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:09,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:10,057 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 05:33:10,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:10,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [957960489] [2023-11-29 05:33:10,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [957960489] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:10,057 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:10,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:33:10,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [789872601] [2023-11-29 05:33:10,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:10,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:33:10,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:10,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:33:10,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:33:10,059 INFO L87 Difference]: Start difference. First operand 55 states and 66 transitions. Second operand has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 05:33:10,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:10,148 INFO L93 Difference]: Finished difference Result 90 states and 106 transitions. [2023-11-29 05:33:10,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:33:10,148 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 9 [2023-11-29 05:33:10,148 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:10,149 INFO L225 Difference]: With dead ends: 90 [2023-11-29 05:33:10,149 INFO L226 Difference]: Without dead ends: 90 [2023-11-29 05:33:10,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:33:10,150 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 88 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 88 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:10,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [88 Valid, 33 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:33:10,152 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2023-11-29 05:33:10,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 57. [2023-11-29 05:33:10,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 43 states have (on average 1.627906976744186) internal successors, (70), 56 states have internal predecessors, (70), 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 05:33:10,156 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 70 transitions. [2023-11-29 05:33:10,156 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 70 transitions. Word has length 9 [2023-11-29 05:33:10,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:10,156 INFO L495 AbstractCegarLoop]: Abstraction has 57 states and 70 transitions. [2023-11-29 05:33:10,157 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 2.25) internal successors, (9), 5 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 05:33:10,157 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 70 transitions. [2023-11-29 05:33:10,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 05:33:10,157 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:10,158 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:10,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 05:33:10,158 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:10,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:10,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1844741599, now seen corresponding path program 1 times [2023-11-29 05:33:10,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:10,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090136076] [2023-11-29 05:33:10,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:10,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:10,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:10,263 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 05:33:10,263 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:10,263 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090136076] [2023-11-29 05:33:10,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2090136076] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:10,264 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:10,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:33:10,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2716451] [2023-11-29 05:33:10,264 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:10,264 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:33:10,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:10,265 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:33:10,265 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:33:10,265 INFO L87 Difference]: Start difference. First operand 57 states and 70 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 05:33:10,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:10,360 INFO L93 Difference]: Finished difference Result 82 states and 96 transitions. [2023-11-29 05:33:10,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:33:10,361 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 10 [2023-11-29 05:33:10,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:10,361 INFO L225 Difference]: With dead ends: 82 [2023-11-29 05:33:10,362 INFO L226 Difference]: Without dead ends: 82 [2023-11-29 05:33:10,362 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:33:10,363 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 24 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:10,363 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 62 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:33:10,364 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-29 05:33:10,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 62. [2023-11-29 05:33:10,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 61 states have internal predecessors, (76), 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 05:33:10,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2023-11-29 05:33:10,369 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 10 [2023-11-29 05:33:10,369 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:10,369 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2023-11-29 05:33:10,369 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 4 states have internal predecessors, (10), 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 05:33:10,370 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2023-11-29 05:33:10,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 05:33:10,370 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:10,371 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:10,371 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 05:33:10,371 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:10,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:10,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1035394973, now seen corresponding path program 1 times [2023-11-29 05:33:10,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:10,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549858179] [2023-11-29 05:33:10,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:10,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:10,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:10,579 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 05:33:10,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:10,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549858179] [2023-11-29 05:33:10,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549858179] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:10,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:10,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:33:10,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [758911143] [2023-11-29 05:33:10,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:10,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:33:10,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:10,582 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:33:10,582 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:33:10,582 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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 05:33:10,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:10,676 INFO L93 Difference]: Finished difference Result 87 states and 102 transitions. [2023-11-29 05:33:10,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:33:10,676 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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 10 [2023-11-29 05:33:10,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:10,677 INFO L225 Difference]: With dead ends: 87 [2023-11-29 05:33:10,678 INFO L226 Difference]: Without dead ends: 87 [2023-11-29 05:33:10,678 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:33:10,679 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 100 mSDsluCounter, 17 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 100 SdHoareTripleChecker+Valid, 35 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:10,679 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [100 Valid, 35 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:33:10,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-29 05:33:10,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 62. [2023-11-29 05:33:10,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 48 states have (on average 1.5833333333333333) internal successors, (76), 61 states have internal predecessors, (76), 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 05:33:10,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 76 transitions. [2023-11-29 05:33:10,684 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 76 transitions. Word has length 10 [2023-11-29 05:33:10,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:10,685 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 76 transitions. [2023-11-29 05:33:10,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 6 states have internal predecessors, (10), 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 05:33:10,685 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 76 transitions. [2023-11-29 05:33:10,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 05:33:10,686 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:10,686 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:10,686 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 05:33:10,686 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:10,687 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:10,687 INFO L85 PathProgramCache]: Analyzing trace with hash 1035512822, now seen corresponding path program 1 times [2023-11-29 05:33:10,687 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:10,687 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [400874366] [2023-11-29 05:33:10,687 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:10,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:10,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:10,909 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 05:33:10,910 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:10,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [400874366] [2023-11-29 05:33:10,910 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [400874366] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:10,910 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1264440320] [2023-11-29 05:33:10,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:10,911 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:10,911 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:10,912 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:10,919 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 05:33:10,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:10,983 INFO L262 TraceCheckSpWp]: Trace formula consists of 66 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 05:33:10,986 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:11,014 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 7 [2023-11-29 05:33:11,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 2 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 05:33:11,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:11,208 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:11,432 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 05:33:11,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1264440320] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:11,432 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:11,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5, 5] total 15 [2023-11-29 05:33:11,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815279527] [2023-11-29 05:33:11,433 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:11,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 05:33:11,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:11,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 05:33:11,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:33:11,435 INFO L87 Difference]: Start difference. First operand 62 states and 76 transitions. Second operand has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 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 05:33:11,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:11,651 INFO L93 Difference]: Finished difference Result 65 states and 80 transitions. [2023-11-29 05:33:11,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:33:11,652 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 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 10 [2023-11-29 05:33:11,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:11,653 INFO L225 Difference]: With dead ends: 65 [2023-11-29 05:33:11,653 INFO L226 Difference]: Without dead ends: 65 [2023-11-29 05:33:11,653 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:33:11,654 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 131 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 112 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 131 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 112 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:11,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [131 Valid, 62 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 112 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:33:11,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-29 05:33:11,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 59. [2023-11-29 05:33:11,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 59 states, 46 states have (on average 1.565217391304348) internal successors, (72), 58 states have internal predecessors, (72), 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 05:33:11,657 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 72 transitions. [2023-11-29 05:33:11,657 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 72 transitions. Word has length 10 [2023-11-29 05:33:11,657 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:11,657 INFO L495 AbstractCegarLoop]: Abstraction has 59 states and 72 transitions. [2023-11-29 05:33:11,658 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.875) internal successors, (30), 16 states have internal predecessors, (30), 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 05:33:11,658 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 72 transitions. [2023-11-29 05:33:11,658 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 05:33:11,658 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:11,658 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:11,664 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 05:33:11,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 05:33:11,864 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:11,865 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:11,865 INFO L85 PathProgramCache]: Analyzing trace with hash 1352416211, now seen corresponding path program 1 times [2023-11-29 05:33:11,865 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:11,865 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444400886] [2023-11-29 05:33:11,865 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:11,865 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:11,907 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 05:33:11,907 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:11,907 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444400886] [2023-11-29 05:33:11,907 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1444400886] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:11,907 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:11,908 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:33:11,908 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131389322] [2023-11-29 05:33:11,908 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:11,908 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:33:11,908 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:11,909 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:33:11,909 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:33:11,909 INFO L87 Difference]: Start difference. First operand 59 states and 72 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 05:33:11,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:11,948 INFO L93 Difference]: Finished difference Result 56 states and 69 transitions. [2023-11-29 05:33:11,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:33:11,949 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 05:33:11,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:11,949 INFO L225 Difference]: With dead ends: 56 [2023-11-29 05:33:11,950 INFO L226 Difference]: Without dead ends: 56 [2023-11-29 05:33:11,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:33:11,951 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 40 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:11,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 33 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:33:11,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-29 05:33:11,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 56. [2023-11-29 05:33:11,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 46 states have (on average 1.5) internal successors, (69), 55 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 05:33:11,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 69 transitions. [2023-11-29 05:33:11,954 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 69 transitions. Word has length 11 [2023-11-29 05:33:11,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:11,955 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 69 transitions. [2023-11-29 05:33:11,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 4 states have internal predecessors, (11), 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 05:33:11,955 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 69 transitions. [2023-11-29 05:33:11,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 05:33:11,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:11,956 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:11,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 05:33:11,956 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:11,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:11,957 INFO L85 PathProgramCache]: Analyzing trace with hash 1352416212, now seen corresponding path program 1 times [2023-11-29 05:33:11,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:11,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336623237] [2023-11-29 05:33:11,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:11,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:11,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:12,052 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 05:33:12,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:12,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336623237] [2023-11-29 05:33:12,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336623237] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:12,053 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:12,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:33:12,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [343112685] [2023-11-29 05:33:12,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:12,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:33:12,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:12,056 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:33:12,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:33:12,056 INFO L87 Difference]: Start difference. First operand 56 states and 69 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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 05:33:12,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:12,135 INFO L93 Difference]: Finished difference Result 69 states and 84 transitions. [2023-11-29 05:33:12,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:33:12,136 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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 05:33:12,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:12,137 INFO L225 Difference]: With dead ends: 69 [2023-11-29 05:33:12,137 INFO L226 Difference]: Without dead ends: 69 [2023-11-29 05:33:12,137 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:33:12,138 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 128 mSDsluCounter, 28 mSDsCounter, 0 mSdLazyCounter, 59 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 128 SdHoareTripleChecker+Valid, 46 SdHoareTripleChecker+Invalid, 63 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 59 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:12,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [128 Valid, 46 Invalid, 63 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 59 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:33:12,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-29 05:33:12,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 62. [2023-11-29 05:33:12,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 52 states have (on average 1.5192307692307692) internal successors, (79), 61 states have internal predecessors, (79), 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 05:33:12,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 79 transitions. [2023-11-29 05:33:12,141 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 79 transitions. Word has length 11 [2023-11-29 05:33:12,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:12,141 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 79 transitions. [2023-11-29 05:33:12,142 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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 05:33:12,142 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 79 transitions. [2023-11-29 05:33:12,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 05:33:12,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:12,143 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:12,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-29 05:33:12,143 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:12,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:12,143 INFO L85 PathProgramCache]: Analyzing trace with hash 569441861, now seen corresponding path program 1 times [2023-11-29 05:33:12,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:12,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [918833311] [2023-11-29 05:33:12,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:12,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:12,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:12,313 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:12,313 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:12,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [918833311] [2023-11-29 05:33:12,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [918833311] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:12,314 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:12,314 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:33:12,314 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1453730625] [2023-11-29 05:33:12,314 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:12,315 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:33:12,315 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:12,315 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:33:12,315 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:33:12,315 INFO L87 Difference]: Start difference. First operand 62 states and 79 transitions. Second operand has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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 05:33:12,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:12,365 INFO L93 Difference]: Finished difference Result 61 states and 77 transitions. [2023-11-29 05:33:12,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:33:12,367 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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 05:33:12,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:12,367 INFO L225 Difference]: With dead ends: 61 [2023-11-29 05:33:12,367 INFO L226 Difference]: Without dead ends: 61 [2023-11-29 05:33:12,368 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:33:12,368 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 24 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 30 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 24 SdHoareTripleChecker+Valid, 21 SdHoareTripleChecker+Invalid, 32 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 30 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:12,369 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [24 Valid, 21 Invalid, 32 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 30 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:33:12,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-29 05:33:12,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2023-11-29 05:33:12,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 40 states have (on average 1.525) internal successors, (61), 48 states have internal predecessors, (61), 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 05:33:12,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 61 transitions. [2023-11-29 05:33:12,372 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 61 transitions. Word has length 11 [2023-11-29 05:33:12,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:12,372 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 61 transitions. [2023-11-29 05:33:12,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.2) internal successors, (11), 6 states have internal predecessors, (11), 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 05:33:12,372 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 61 transitions. [2023-11-29 05:33:12,373 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 05:33:12,373 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:12,373 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:12,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-29 05:33:12,373 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:12,374 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:12,374 INFO L85 PathProgramCache]: Analyzing trace with hash -1304641916, now seen corresponding path program 1 times [2023-11-29 05:33:12,374 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:12,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662280853] [2023-11-29 05:33:12,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:12,375 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:12,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:12,539 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:12,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:12,540 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662280853] [2023-11-29 05:33:12,540 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662280853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:12,540 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:12,540 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 05:33:12,540 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [473998959] [2023-11-29 05:33:12,541 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:12,541 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 05:33:12,541 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:12,542 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 05:33:12,542 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:33:12,542 INFO L87 Difference]: Start difference. First operand 49 states and 61 transitions. Second operand has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 05:33:12,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:12,589 INFO L93 Difference]: Finished difference Result 48 states and 60 transitions. [2023-11-29 05:33:12,589 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 05:33:12,589 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 12 [2023-11-29 05:33:12,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:12,590 INFO L225 Difference]: With dead ends: 48 [2023-11-29 05:33:12,590 INFO L226 Difference]: Without dead ends: 48 [2023-11-29 05:33:12,590 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:33:12,591 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 21 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 31 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 31 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:12,591 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 26 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 31 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:33:12,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2023-11-29 05:33:12,593 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 44. [2023-11-29 05:33:12,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 36 states have (on average 1.5277777777777777) internal successors, (55), 43 states have internal predecessors, (55), 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 05:33:12,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 55 transitions. [2023-11-29 05:33:12,594 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 55 transitions. Word has length 12 [2023-11-29 05:33:12,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:12,594 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 55 transitions. [2023-11-29 05:33:12,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 2.4) internal successors, (12), 6 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 05:33:12,594 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 55 transitions. [2023-11-29 05:33:12,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 05:33:12,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:12,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:12,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-29 05:33:12,595 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:12,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:12,596 INFO L85 PathProgramCache]: Analyzing trace with hash -1255422936, now seen corresponding path program 1 times [2023-11-29 05:33:12,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:12,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972646250] [2023-11-29 05:33:12,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:12,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:12,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:12,629 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 05:33:12,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:12,629 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972646250] [2023-11-29 05:33:12,629 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972646250] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:12,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:12,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:33:12,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1693963377] [2023-11-29 05:33:12,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:12,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:33:12,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:12,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:33:12,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:33:12,631 INFO L87 Difference]: Start difference. First operand 44 states and 55 transitions. Second operand has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:12,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:12,657 INFO L93 Difference]: Finished difference Result 42 states and 52 transitions. [2023-11-29 05:33:12,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:33:12,658 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-29 05:33:12,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:12,659 INFO L225 Difference]: With dead ends: 42 [2023-11-29 05:33:12,659 INFO L226 Difference]: Without dead ends: 42 [2023-11-29 05:33:12,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:33:12,659 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 9 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 19 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 21 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 19 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:12,660 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 29 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 19 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:33:12,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2023-11-29 05:33:12,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2023-11-29 05:33:12,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 36 states have (on average 1.4444444444444444) internal successors, (52), 41 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:12,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 52 transitions. [2023-11-29 05:33:12,661 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 52 transitions. Word has length 14 [2023-11-29 05:33:12,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:12,662 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 52 transitions. [2023-11-29 05:33:12,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.0) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:12,662 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 52 transitions. [2023-11-29 05:33:12,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 05:33:12,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:12,663 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:12,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-29 05:33:12,663 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:12,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:12,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1255422935, now seen corresponding path program 1 times [2023-11-29 05:33:12,664 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:12,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028291034] [2023-11-29 05:33:12,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:12,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:12,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:12,773 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 05:33:12,773 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:12,773 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028291034] [2023-11-29 05:33:12,773 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1028291034] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:12,773 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:12,773 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 05:33:12,773 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [150867747] [2023-11-29 05:33:12,774 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:12,774 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 05:33:12,774 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:12,774 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 05:33:12,775 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 05:33:12,775 INFO L87 Difference]: Start difference. First operand 42 states and 52 transitions. Second operand has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:12,827 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:12,827 INFO L93 Difference]: Finished difference Result 43 states and 52 transitions. [2023-11-29 05:33:12,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 05:33:12,828 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-29 05:33:12,828 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:12,828 INFO L225 Difference]: With dead ends: 43 [2023-11-29 05:33:12,828 INFO L226 Difference]: Without dead ends: 43 [2023-11-29 05:33:12,829 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 05:33:12,829 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 62 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 32 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:12,830 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 32 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:33:12,830 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-29 05:33:12,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 43. [2023-11-29 05:33:12,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 37 states have (on average 1.4054054054054055) internal successors, (52), 42 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:12,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 52 transitions. [2023-11-29 05:33:12,832 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 52 transitions. Word has length 14 [2023-11-29 05:33:12,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:12,832 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 52 transitions. [2023-11-29 05:33:12,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 3.5) internal successors, (14), 5 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:12,833 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 52 transitions. [2023-11-29 05:33:12,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 05:33:12,833 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:12,833 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:12,834 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2023-11-29 05:33:12,834 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:12,834 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:12,834 INFO L85 PathProgramCache]: Analyzing trace with hash -1255413862, now seen corresponding path program 1 times [2023-11-29 05:33:12,834 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:12,835 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1017018901] [2023-11-29 05:33:12,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:12,835 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:12,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:12,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:12,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:12,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1017018901] [2023-11-29 05:33:12,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1017018901] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:12,859 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:12,859 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 05:33:12,859 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62356854] [2023-11-29 05:33:12,860 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:12,860 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 05:33:12,860 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:12,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 05:33:12,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:33:12,861 INFO L87 Difference]: Start difference. First operand 43 states and 52 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:12,881 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:12,881 INFO L93 Difference]: Finished difference Result 45 states and 54 transitions. [2023-11-29 05:33:12,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 05:33:12,881 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-29 05:33:12,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:12,882 INFO L225 Difference]: With dead ends: 45 [2023-11-29 05:33:12,882 INFO L226 Difference]: Without dead ends: 45 [2023-11-29 05:33:12,882 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 05:33:12,883 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 0 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 20 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:12,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 41 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:33:12,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-29 05:33:12,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 45. [2023-11-29 05:33:12,885 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 39 states have (on average 1.3846153846153846) internal successors, (54), 44 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 05:33:12,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 54 transitions. [2023-11-29 05:33:12,886 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 54 transitions. Word has length 14 [2023-11-29 05:33:12,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:12,886 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 54 transitions. [2023-11-29 05:33:12,886 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 3 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:12,886 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 54 transitions. [2023-11-29 05:33:12,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 05:33:12,887 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:12,887 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:12,887 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2023-11-29 05:33:12,888 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:12,888 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:12,888 INFO L85 PathProgramCache]: Analyzing trace with hash 424406906, now seen corresponding path program 1 times [2023-11-29 05:33:12,888 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:12,888 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1734661055] [2023-11-29 05:33:12,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:12,889 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:12,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:13,046 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:13,046 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:13,046 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1734661055] [2023-11-29 05:33:13,046 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1734661055] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:13,047 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:13,047 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 05:33:13,047 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [570038434] [2023-11-29 05:33:13,047 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:13,047 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 05:33:13,047 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:13,048 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 05:33:13,048 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=30, Unknown=0, NotChecked=0, Total=42 [2023-11-29 05:33:13,048 INFO L87 Difference]: Start difference. First operand 45 states and 54 transitions. Second operand has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 05:33:13,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:13,157 INFO L93 Difference]: Finished difference Result 60 states and 69 transitions. [2023-11-29 05:33:13,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 05:33:13,157 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 16 [2023-11-29 05:33:13,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:13,158 INFO L225 Difference]: With dead ends: 60 [2023-11-29 05:33:13,158 INFO L226 Difference]: Without dead ends: 60 [2023-11-29 05:33:13,158 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 05:33:13,159 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 23 mSDsluCounter, 80 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 98 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:13,159 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 98 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:33:13,160 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-29 05:33:13,161 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2023-11-29 05:33:13,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 49 states have (on average 1.3265306122448979) internal successors, (65), 54 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:13,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 65 transitions. [2023-11-29 05:33:13,162 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 65 transitions. Word has length 16 [2023-11-29 05:33:13,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:13,163 INFO L495 AbstractCegarLoop]: Abstraction has 55 states and 65 transitions. [2023-11-29 05:33:13,163 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 2.2857142857142856) internal successors, (16), 7 states have internal predecessors, (16), 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 05:33:13,163 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 65 transitions. [2023-11-29 05:33:13,164 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 05:33:13,164 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:13,164 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:13,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2023-11-29 05:33:13,164 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:13,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:13,165 INFO L85 PathProgramCache]: Analyzing trace with hash 433075098, now seen corresponding path program 1 times [2023-11-29 05:33:13,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:13,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [784919731] [2023-11-29 05:33:13,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:13,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:13,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:13,284 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 05:33:13,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:13,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [784919731] [2023-11-29 05:33:13,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [784919731] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:13,285 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:13,285 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 05:33:13,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191491375] [2023-11-29 05:33:13,285 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:13,286 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 05:33:13,286 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:13,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 05:33:13,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:33:13,287 INFO L87 Difference]: Start difference. First operand 55 states and 65 transitions. Second operand has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 05:33:13,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:13,314 INFO L93 Difference]: Finished difference Result 54 states and 64 transitions. [2023-11-29 05:33:13,314 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 05:33:13,315 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 16 [2023-11-29 05:33:13,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:13,315 INFO L225 Difference]: With dead ends: 54 [2023-11-29 05:33:13,315 INFO L226 Difference]: Without dead ends: 35 [2023-11-29 05:33:13,315 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 05:33:13,316 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 15 mSDsluCounter, 19 mSDsCounter, 0 mSdLazyCounter, 22 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 22 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:13,316 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 38 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 22 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 05:33:13,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 35 states. [2023-11-29 05:33:13,318 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 35 to 35. [2023-11-29 05:33:13,318 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 35 states, 30 states have (on average 1.3333333333333333) internal successors, (40), 34 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 05:33:13,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 35 states to 35 states and 40 transitions. [2023-11-29 05:33:13,318 INFO L78 Accepts]: Start accepts. Automaton has 35 states and 40 transitions. Word has length 16 [2023-11-29 05:33:13,318 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:13,318 INFO L495 AbstractCegarLoop]: Abstraction has 35 states and 40 transitions. [2023-11-29 05:33:13,319 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 5.333333333333333) internal successors, (16), 3 states have internal predecessors, (16), 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 05:33:13,319 INFO L276 IsEmpty]: Start isEmpty. Operand 35 states and 40 transitions. [2023-11-29 05:33:13,319 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-29 05:33:13,319 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:13,319 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:13,319 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2023-11-29 05:33:13,320 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:13,320 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:13,320 INFO L85 PathProgramCache]: Analyzing trace with hash -855456772, now seen corresponding path program 1 times [2023-11-29 05:33:13,320 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:13,321 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772657288] [2023-11-29 05:33:13,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:13,321 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:13,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:13,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:13,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:13,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772657288] [2023-11-29 05:33:13,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1772657288] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:13,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 05:33:13,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2023-11-29 05:33:13,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076319838] [2023-11-29 05:33:13,536 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:13,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 05:33:13,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:13,537 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 05:33:13,537 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2023-11-29 05:33:13,537 INFO L87 Difference]: Start difference. First operand 35 states and 40 transitions. Second operand has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 05:33:13,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:13,645 INFO L93 Difference]: Finished difference Result 49 states and 56 transitions. [2023-11-29 05:33:13,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 05:33:13,648 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 16 [2023-11-29 05:33:13,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:13,648 INFO L225 Difference]: With dead ends: 49 [2023-11-29 05:33:13,648 INFO L226 Difference]: Without dead ends: 39 [2023-11-29 05:33:13,649 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2023-11-29 05:33:13,650 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 40 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:13,650 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 69 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:33:13,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-29 05:33:13,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 37. [2023-11-29 05:33:13,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 32 states have (on average 1.3125) internal successors, (42), 36 states have internal predecessors, (42), 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 05:33:13,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 42 transitions. [2023-11-29 05:33:13,653 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 42 transitions. Word has length 16 [2023-11-29 05:33:13,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:13,653 INFO L495 AbstractCegarLoop]: Abstraction has 37 states and 42 transitions. [2023-11-29 05:33:13,653 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 2.0) internal successors, (16), 8 states have internal predecessors, (16), 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 05:33:13,653 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 42 transitions. [2023-11-29 05:33:13,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 05:33:13,654 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:13,654 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:13,654 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2023-11-29 05:33:13,655 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:13,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:13,655 INFO L85 PathProgramCache]: Analyzing trace with hash 1925758641, now seen corresponding path program 1 times [2023-11-29 05:33:13,655 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:13,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466322754] [2023-11-29 05:33:13,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:13,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:13,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:13,850 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 05:33:13,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:13,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466322754] [2023-11-29 05:33:13,850 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466322754] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:13,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [158729585] [2023-11-29 05:33:13,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:13,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:13,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:13,853 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:13,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 05:33:13,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:13,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 127 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 05:33:13,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:14,016 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-11-29 05:33:14,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-29 05:33:14,156 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:33:14,156 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:33:14,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [158729585] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:14,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:33:14,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [9] imperfect sequences [7] total 15 [2023-11-29 05:33:14,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [448060783] [2023-11-29 05:33:14,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:14,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 05:33:14,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:14,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 05:33:14,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=177, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:33:14,158 INFO L87 Difference]: Start difference. First operand 37 states and 42 transitions. Second operand has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 05:33:14,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:14,347 INFO L93 Difference]: Finished difference Result 45 states and 49 transitions. [2023-11-29 05:33:14,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:33:14,348 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 18 [2023-11-29 05:33:14,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:14,348 INFO L225 Difference]: With dead ends: 45 [2023-11-29 05:33:14,349 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 05:33:14,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:33:14,350 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 104 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 91 SdHoareTripleChecker+Invalid, 105 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 104 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:14,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 91 Invalid, 105 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 104 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:33:14,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 05:33:14,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-29 05:33:14,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 26 states have (on average 1.3076923076923077) internal successors, (34), 30 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 05:33:14,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 34 transitions. [2023-11-29 05:33:14,352 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 34 transitions. Word has length 18 [2023-11-29 05:33:14,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:14,352 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 34 transitions. [2023-11-29 05:33:14,352 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 2.0) internal successors, (18), 9 states have internal predecessors, (18), 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 05:33:14,353 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 34 transitions. [2023-11-29 05:33:14,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-29 05:33:14,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:14,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:14,358 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 05:33:14,554 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 05:33:14,554 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:14,554 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:14,554 INFO L85 PathProgramCache]: Analyzing trace with hash 904690287, now seen corresponding path program 1 times [2023-11-29 05:33:14,555 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:14,555 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616736267] [2023-11-29 05:33:14,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:14,555 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:14,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:14,748 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 05:33:14,748 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:14,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616736267] [2023-11-29 05:33:14,748 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1616736267] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:14,748 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [708152582] [2023-11-29 05:33:14,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:14,749 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:14,749 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:14,750 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:14,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 05:33:14,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:14,835 INFO L262 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 05:33:14,837 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:14,923 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 05:33:14,923 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:15,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 05:33:15,052 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 05:33:15,053 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [708152582] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:15,053 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:15,053 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7, 7] total 16 [2023-11-29 05:33:15,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639635426] [2023-11-29 05:33:15,053 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:15,054 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-29 05:33:15,054 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:15,054 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-29 05:33:15,055 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2023-11-29 05:33:15,055 INFO L87 Difference]: Start difference. First operand 31 states and 34 transitions. Second operand has 17 states, 16 states have (on average 2.5) internal successors, (40), 17 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 05:33:15,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:15,226 INFO L93 Difference]: Finished difference Result 40 states and 44 transitions. [2023-11-29 05:33:15,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:33:15,227 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 17 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) Word has length 18 [2023-11-29 05:33:15,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:15,228 INFO L225 Difference]: With dead ends: 40 [2023-11-29 05:33:15,228 INFO L226 Difference]: Without dead ends: 40 [2023-11-29 05:33:15,228 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 24 SyntacticMatches, 2 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2023-11-29 05:33:15,229 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 144 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 52 SdHoareTripleChecker+Invalid, 110 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:15,229 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 52 Invalid, 110 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:33:15,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-29 05:33:15,230 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 30. [2023-11-29 05:33:15,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 27 states have (on average 1.2222222222222223) internal successors, (33), 29 states have internal predecessors, (33), 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 05:33:15,231 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 33 transitions. [2023-11-29 05:33:15,231 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 33 transitions. Word has length 18 [2023-11-29 05:33:15,231 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:15,231 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 33 transitions. [2023-11-29 05:33:15,232 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 2.5) internal successors, (40), 17 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 05:33:15,232 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 33 transitions. [2023-11-29 05:33:15,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-29 05:33:15,232 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:15,232 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:15,240 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 05:33:15,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 05:33:15,440 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:15,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:15,440 INFO L85 PathProgramCache]: Analyzing trace with hash 709966766, now seen corresponding path program 1 times [2023-11-29 05:33:15,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:15,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332410194] [2023-11-29 05:33:15,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:15,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:15,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:15,699 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:15,699 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:15,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332410194] [2023-11-29 05:33:15,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [332410194] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:15,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850503757] [2023-11-29 05:33:15,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:15,700 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:15,700 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:15,701 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:15,704 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 05:33:15,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:15,782 INFO L262 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 23 conjunts are in the unsatisfiable core [2023-11-29 05:33:15,784 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:15,847 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2023-11-29 05:33:15,908 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:15,908 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:15,931 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 05:33:15,933 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 16 treesize of output 12 [2023-11-29 05:33:16,015 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 2 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:16,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [850503757] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:16,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:16,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-11-29 05:33:16,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787720840] [2023-11-29 05:33:16,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:16,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:33:16,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:16,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:33:16,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:33:16,017 INFO L87 Difference]: Start difference. First operand 30 states and 33 transitions. Second operand has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 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 05:33:16,246 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:16,246 INFO L93 Difference]: Finished difference Result 50 states and 54 transitions. [2023-11-29 05:33:16,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:33:16,246 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 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) Word has length 21 [2023-11-29 05:33:16,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:16,247 INFO L225 Difference]: With dead ends: 50 [2023-11-29 05:33:16,247 INFO L226 Difference]: Without dead ends: 50 [2023-11-29 05:33:16,247 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=125, Invalid=525, Unknown=0, NotChecked=0, Total=650 [2023-11-29 05:33:16,248 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 65 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 193 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 121 SdHoareTripleChecker+Invalid, 195 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 193 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:16,248 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 121 Invalid, 195 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 193 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:33:16,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-29 05:33:16,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 45. [2023-11-29 05:33:16,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.1904761904761905) internal successors, (50), 44 states have internal predecessors, (50), 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 05:33:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 50 transitions. [2023-11-29 05:33:16,251 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 50 transitions. Word has length 21 [2023-11-29 05:33:16,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:16,251 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 50 transitions. [2023-11-29 05:33:16,252 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.0) internal successors, (40), 20 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 05:33:16,252 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 50 transitions. [2023-11-29 05:33:16,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2023-11-29 05:33:16,253 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:16,253 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:16,259 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 05:33:16,459 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 05:33:16,460 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:16,460 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:16,460 INFO L85 PathProgramCache]: Analyzing trace with hash 534414065, now seen corresponding path program 1 times [2023-11-29 05:33:16,460 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:16,460 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1385318951] [2023-11-29 05:33:16,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:16,460 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:16,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:16,850 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 05:33:16,851 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:16,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1385318951] [2023-11-29 05:33:16,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1385318951] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:16,851 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [391736035] [2023-11-29 05:33:16,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:16,851 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:16,851 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:16,852 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:16,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 05:33:16,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:16,938 INFO L262 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 26 conjunts are in the unsatisfiable core [2023-11-29 05:33:16,940 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:17,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 11 treesize of output 7 [2023-11-29 05:33:17,196 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-29 05:33:17,246 INFO L173 IndexEqualityManager]: detected equality via solver [2023-11-29 05:33:17,249 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:33:17,249 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 29 treesize of output 20 [2023-11-29 05:33:17,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:33:17,268 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 05:33:17,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [391736035] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 05:33:17,268 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 05:33:17,268 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [11] imperfect sequences [9] total 18 [2023-11-29 05:33:17,269 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303565219] [2023-11-29 05:33:17,269 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 05:33:17,269 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 11 states [2023-11-29 05:33:17,269 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:17,269 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2023-11-29 05:33:17,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=263, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:33:17,270 INFO L87 Difference]: Start difference. First operand 45 states and 50 transitions. Second operand has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 05:33:17,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:17,518 INFO L93 Difference]: Finished difference Result 65 states and 70 transitions. [2023-11-29 05:33:17,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:33:17,519 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 22 [2023-11-29 05:33:17,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:17,519 INFO L225 Difference]: With dead ends: 65 [2023-11-29 05:33:17,519 INFO L226 Difference]: Without dead ends: 49 [2023-11-29 05:33:17,520 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2023-11-29 05:33:17,521 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 38 mSDsluCounter, 49 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 61 SdHoareTripleChecker+Invalid, 92 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:17,521 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 61 Invalid, 92 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:33:17,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-29 05:33:17,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 47. [2023-11-29 05:33:17,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.1818181818181819) internal successors, (52), 46 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:17,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 52 transitions. [2023-11-29 05:33:17,523 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 52 transitions. Word has length 22 [2023-11-29 05:33:17,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:17,523 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 52 transitions. [2023-11-29 05:33:17,523 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 11 states, 11 states have (on average 2.0) internal successors, (22), 11 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 05:33:17,523 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 52 transitions. [2023-11-29 05:33:17,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-29 05:33:17,524 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:17,524 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:17,530 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 05:33:17,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 05:33:17,730 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:17,731 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:17,731 INFO L85 PathProgramCache]: Analyzing trace with hash 1199569752, now seen corresponding path program 1 times [2023-11-29 05:33:17,731 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:17,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [293140029] [2023-11-29 05:33:17,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:17,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:17,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:17,976 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:33:17,977 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:17,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [293140029] [2023-11-29 05:33:17,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [293140029] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:17,977 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [760032869] [2023-11-29 05:33:17,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:17,977 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:17,977 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:17,978 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:17,981 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 05:33:18,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:18,064 INFO L262 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 05:33:18,065 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:18,141 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:33:18,141 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:18,238 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 05:33:18,264 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:33:18,264 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [760032869] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:18,264 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:18,264 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 14 [2023-11-29 05:33:18,264 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167797548] [2023-11-29 05:33:18,265 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:18,265 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 05:33:18,265 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:18,266 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 05:33:18,266 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2023-11-29 05:33:18,266 INFO L87 Difference]: Start difference. First operand 47 states and 52 transitions. Second operand has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 15 states have internal predecessors, (51), 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 05:33:18,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:18,459 INFO L93 Difference]: Finished difference Result 58 states and 63 transitions. [2023-11-29 05:33:18,460 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 05:33:18,460 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 15 states have internal predecessors, (51), 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 24 [2023-11-29 05:33:18,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:18,461 INFO L225 Difference]: With dead ends: 58 [2023-11-29 05:33:18,461 INFO L226 Difference]: Without dead ends: 38 [2023-11-29 05:33:18,461 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 38 SyntacticMatches, 2 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 89 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=82, Invalid=260, Unknown=0, NotChecked=0, Total=342 [2023-11-29 05:33:18,462 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 62 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 121 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 62 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 125 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 121 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:18,462 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [62 Valid, 64 Invalid, 125 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 121 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:33:18,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-29 05:33:18,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 36. [2023-11-29 05:33:18,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 33 states have (on average 1.1515151515151516) internal successors, (38), 35 states have internal predecessors, (38), 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 05:33:18,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2023-11-29 05:33:18,465 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 24 [2023-11-29 05:33:18,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:18,465 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2023-11-29 05:33:18,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.642857142857143) internal successors, (51), 15 states have internal predecessors, (51), 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 05:33:18,466 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2023-11-29 05:33:18,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 05:33:18,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:18,466 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:18,473 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 05:33:18,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 05:33:18,667 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:18,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:18,668 INFO L85 PathProgramCache]: Analyzing trace with hash -1808214365, now seen corresponding path program 1 times [2023-11-29 05:33:18,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:18,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065858697] [2023-11-29 05:33:18,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:18,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:18,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:18,915 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 11 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:33:18,915 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:18,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065858697] [2023-11-29 05:33:18,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065858697] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:18,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35214723] [2023-11-29 05:33:18,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:18,916 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:18,916 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:18,917 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:18,918 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 05:33:19,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:19,019 INFO L262 TraceCheckSpWp]: Trace formula consists of 181 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 05:33:19,021 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:19,151 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:33:19,151 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:19,311 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 05:33:19,360 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 1 proven. 10 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 05:33:19,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [35214723] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:19,361 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:19,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 9, 9] total 19 [2023-11-29 05:33:19,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355545756] [2023-11-29 05:33:19,361 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:19,362 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 05:33:19,362 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:19,363 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 05:33:19,363 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=318, Unknown=0, NotChecked=0, Total=380 [2023-11-29 05:33:19,364 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:19,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:19,595 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2023-11-29 05:33:19,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:33:19,595 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2023-11-29 05:33:19,595 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:19,596 INFO L225 Difference]: With dead ends: 47 [2023-11-29 05:33:19,596 INFO L226 Difference]: Without dead ends: 47 [2023-11-29 05:33:19,596 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 39 SyntacticMatches, 3 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=124, Invalid=526, Unknown=0, NotChecked=0, Total=650 [2023-11-29 05:33:19,597 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 118 mSDsluCounter, 85 mSDsCounter, 0 mSdLazyCounter, 215 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 118 SdHoareTripleChecker+Valid, 97 SdHoareTripleChecker+Invalid, 217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 215 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:19,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [118 Valid, 97 Invalid, 217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 215 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:33:19,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-29 05:33:19,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 38. [2023-11-29 05:33:19,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 35 states have (on average 1.1428571428571428) internal successors, (40), 37 states have internal predecessors, (40), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:19,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 40 transitions. [2023-11-29 05:33:19,600 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 40 transitions. Word has length 27 [2023-11-29 05:33:19,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:19,600 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 40 transitions. [2023-11-29 05:33:19,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 3.0526315789473686) internal successors, (58), 20 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:19,600 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 40 transitions. [2023-11-29 05:33:19,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-29 05:33:19,601 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:19,601 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:19,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 05:33:19,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 05:33:19,802 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:19,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:19,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1032912134, now seen corresponding path program 1 times [2023-11-29 05:33:19,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:19,803 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1392405409] [2023-11-29 05:33:19,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:19,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:19,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:20,155 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:33:20,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:20,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1392405409] [2023-11-29 05:33:20,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1392405409] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:20,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2012137279] [2023-11-29 05:33:20,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:20,156 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:20,156 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:20,158 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:20,163 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 05:33:20,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:20,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 195 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 05:33:20,247 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:20,307 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2023-11-29 05:33:20,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-29 05:33:20,440 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:33:20,440 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:20,506 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-29 05:33:20,520 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 05:33:20,522 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 16 treesize of output 12 [2023-11-29 05:33:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 18 backedges. 8 proven. 6 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:33:20,583 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2012137279] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:20,584 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:20,584 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 28 [2023-11-29 05:33:20,584 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997293913] [2023-11-29 05:33:20,584 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:20,584 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 05:33:20,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:20,585 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 05:33:20,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=658, Unknown=0, NotChecked=0, Total=756 [2023-11-29 05:33:20,586 INFO L87 Difference]: Start difference. First operand 38 states and 40 transitions. Second operand has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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 05:33:21,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:21,001 INFO L93 Difference]: Finished difference Result 54 states and 56 transitions. [2023-11-29 05:33:21,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:33:21,002 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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) Word has length 30 [2023-11-29 05:33:21,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:21,002 INFO L225 Difference]: With dead ends: 54 [2023-11-29 05:33:21,002 INFO L226 Difference]: Without dead ends: 41 [2023-11-29 05:33:21,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 45 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=232, Invalid=1174, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 05:33:21,004 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 48 mSDsluCounter, 162 mSDsCounter, 0 mSdLazyCounter, 296 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 48 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 299 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 296 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:21,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [48 Valid, 176 Invalid, 299 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 296 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:33:21,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-29 05:33:21,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 40. [2023-11-29 05:33:21,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 37 states have (on average 1.135135135135135) internal successors, (42), 39 states have internal predecessors, (42), 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 05:33:21,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-11-29 05:33:21,007 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 30 [2023-11-29 05:33:21,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:21,007 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-11-29 05:33:21,007 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.0) internal successors, (56), 28 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 05:33:21,008 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-11-29 05:33:21,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 33 [2023-11-29 05:33:21,008 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:21,008 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:21,016 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-29 05:33:21,216 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 05:33:21,216 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:21,217 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:21,217 INFO L85 PathProgramCache]: Analyzing trace with hash 170670305, now seen corresponding path program 2 times [2023-11-29 05:33:21,217 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:21,217 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284971304] [2023-11-29 05:33:21,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:21,217 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:21,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:21,442 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:33:21,442 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:21,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284971304] [2023-11-29 05:33:21,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [284971304] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:21,443 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563725982] [2023-11-29 05:33:21,443 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:33:21,443 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:21,443 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:21,444 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:21,459 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 05:33:21,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:33:21,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:33:21,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 208 conjuncts, 22 conjunts are in the unsatisfiable core [2023-11-29 05:33:21,566 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:21,684 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:33:21,684 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:21,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 05:33:21,838 INFO L134 CoverageAnalysis]: Checked inductivity of 21 backedges. 1 proven. 16 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:33:21,839 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [563725982] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:21,839 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:21,839 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 17 [2023-11-29 05:33:21,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061346445] [2023-11-29 05:33:21,839 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:21,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-29 05:33:21,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:21,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-29 05:33:21,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2023-11-29 05:33:21,841 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 18 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 05:33:22,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:22,044 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2023-11-29 05:33:22,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2023-11-29 05:33:22,044 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 18 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) Word has length 32 [2023-11-29 05:33:22,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:22,045 INFO L225 Difference]: With dead ends: 47 [2023-11-29 05:33:22,045 INFO L226 Difference]: Without dead ends: 44 [2023-11-29 05:33:22,046 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 51 SyntacticMatches, 3 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=102, Invalid=404, Unknown=0, NotChecked=0, Total=506 [2023-11-29 05:33:22,046 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 96 mSDsluCounter, 104 mSDsCounter, 0 mSdLazyCounter, 219 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 96 SdHoareTripleChecker+Valid, 120 SdHoareTripleChecker+Invalid, 222 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 219 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:22,047 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [96 Valid, 120 Invalid, 222 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 219 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:33:22,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-29 05:33:22,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 43. [2023-11-29 05:33:22,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 40 states have (on average 1.125) internal successors, (45), 42 states have internal predecessors, (45), 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 05:33:22,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 45 transitions. [2023-11-29 05:33:22,049 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 45 transitions. Word has length 32 [2023-11-29 05:33:22,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:22,049 INFO L495 AbstractCegarLoop]: Abstraction has 43 states and 45 transitions. [2023-11-29 05:33:22,050 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 3.7058823529411766) internal successors, (63), 18 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 05:33:22,050 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 45 transitions. [2023-11-29 05:33:22,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-29 05:33:22,050 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:22,050 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:22,056 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 05:33:22,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:22,251 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:22,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:22,251 INFO L85 PathProgramCache]: Analyzing trace with hash 805443122, now seen corresponding path program 2 times [2023-11-29 05:33:22,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:22,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857443283] [2023-11-29 05:33:22,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:22,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:22,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:22,621 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:33:22,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:22,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857443283] [2023-11-29 05:33:22,621 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857443283] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:22,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090339715] [2023-11-29 05:33:22,622 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 05:33:22,622 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:22,622 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:22,623 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:22,649 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 05:33:22,754 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 05:33:22,754 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:33:22,756 INFO L262 TraceCheckSpWp]: Trace formula consists of 224 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 05:33:22,759 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:22,840 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2023-11-29 05:33:22,891 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:33:22,891 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:22,917 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 05:33:22,919 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 16 treesize of output 12 [2023-11-29 05:33:22,978 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:33:22,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1090339715] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:22,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:22,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 21 [2023-11-29 05:33:22,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085879321] [2023-11-29 05:33:22,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:22,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-29 05:33:22,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:22,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-29 05:33:22,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=360, Unknown=0, NotChecked=0, Total=420 [2023-11-29 05:33:22,980 INFO L87 Difference]: Start difference. First operand 43 states and 45 transitions. Second operand has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 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 05:33:23,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:23,204 INFO L93 Difference]: Finished difference Result 67 states and 70 transitions. [2023-11-29 05:33:23,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 05:33:23,205 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 34 [2023-11-29 05:33:23,205 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:23,205 INFO L225 Difference]: With dead ends: 67 [2023-11-29 05:33:23,205 INFO L226 Difference]: Without dead ends: 46 [2023-11-29 05:33:23,206 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 59 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=134, Invalid=678, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:33:23,206 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 44 mSDsluCounter, 141 mSDsCounter, 0 mSdLazyCounter, 267 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 154 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 267 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:23,207 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 154 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 267 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 05:33:23,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2023-11-29 05:33:23,208 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 45. [2023-11-29 05:33:23,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 42 states have (on average 1.119047619047619) internal successors, (47), 44 states have internal predecessors, (47), 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 05:33:23,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 47 transitions. [2023-11-29 05:33:23,209 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 47 transitions. Word has length 34 [2023-11-29 05:33:23,209 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:23,209 INFO L495 AbstractCegarLoop]: Abstraction has 45 states and 47 transitions. [2023-11-29 05:33:23,209 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.5238095238095237) internal successors, (53), 21 states have internal predecessors, (53), 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 05:33:23,209 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 47 transitions. [2023-11-29 05:33:23,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 37 [2023-11-29 05:33:23,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:23,209 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:23,215 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-29 05:33:23,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:23,410 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:23,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:23,411 INFO L85 PathProgramCache]: Analyzing trace with hash 89372199, now seen corresponding path program 3 times [2023-11-29 05:33:23,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:23,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110750751] [2023-11-29 05:33:23,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:23,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:23,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:23,685 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:33:23,686 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:23,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110750751] [2023-11-29 05:33:23,686 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110750751] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:23,686 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1051587401] [2023-11-29 05:33:23,686 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:33:23,686 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:23,687 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:23,688 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:23,690 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 05:33:23,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 05:33:23,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:33:23,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-29 05:33:23,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:23,983 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:33:23,983 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:24,201 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 05:33:24,261 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-29 05:33:24,261 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1051587401] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:24,262 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:24,262 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 11, 11] total 26 [2023-11-29 05:33:24,262 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [377294425] [2023-11-29 05:33:24,262 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:24,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-29 05:33:24,263 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:24,263 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-29 05:33:24,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=593, Unknown=0, NotChecked=0, Total=702 [2023-11-29 05:33:24,264 INFO L87 Difference]: Start difference. First operand 45 states and 47 transitions. Second operand has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 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 05:33:24,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:24,541 INFO L93 Difference]: Finished difference Result 56 states and 58 transitions. [2023-11-29 05:33:24,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2023-11-29 05:33:24,541 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 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 05:33:24,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:24,542 INFO L225 Difference]: With dead ends: 56 [2023-11-29 05:33:24,542 INFO L226 Difference]: Without dead ends: 56 [2023-11-29 05:33:24,543 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 51 SyntacticMatches, 4 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=923, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 05:33:24,544 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 172 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 288 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 172 SdHoareTripleChecker+Valid, 111 SdHoareTripleChecker+Invalid, 289 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 288 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:24,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [172 Valid, 111 Invalid, 289 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 288 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:33:24,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 56 states. [2023-11-29 05:33:24,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 56 to 47. [2023-11-29 05:33:24,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 47 states, 44 states have (on average 1.1136363636363635) internal successors, (49), 46 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 05:33:24,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 49 transitions. [2023-11-29 05:33:24,547 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 49 transitions. Word has length 36 [2023-11-29 05:33:24,547 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:24,547 INFO L495 AbstractCegarLoop]: Abstraction has 47 states and 49 transitions. [2023-11-29 05:33:24,547 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 26 states have (on average 3.1923076923076925) internal successors, (83), 27 states have internal predecessors, (83), 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 05:33:24,548 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 49 transitions. [2023-11-29 05:33:24,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 05:33:24,548 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:24,548 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:24,554 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 05:33:24,754 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:24,754 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:24,755 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:24,755 INFO L85 PathProgramCache]: Analyzing trace with hash -391133962, now seen corresponding path program 3 times [2023-11-29 05:33:24,755 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:24,755 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422331436] [2023-11-29 05:33:24,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:24,755 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:24,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:25,460 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 05:33:25,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:25,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422331436] [2023-11-29 05:33:25,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [422331436] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:25,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1765457628] [2023-11-29 05:33:25,461 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 05:33:25,461 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:25,461 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:25,462 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:25,465 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 05:33:25,679 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 05:33:25,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:33:25,681 INFO L262 TraceCheckSpWp]: Trace formula consists of 251 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 05:33:25,682 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:25,765 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 13 treesize of output 9 [2023-11-29 05:33:25,863 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 8 [2023-11-29 05:33:25,892 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:33:25,892 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:25,905 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 20 treesize of output 12 [2023-11-29 05:33:25,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 05:33:25,926 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 16 treesize of output 12 [2023-11-29 05:33:25,988 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 12 proven. 19 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:33:25,988 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1765457628] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:25,989 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:25,989 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 14, 14] total 29 [2023-11-29 05:33:25,989 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731580526] [2023-11-29 05:33:25,989 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:25,989 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 05:33:25,989 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:25,990 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 05:33:25,990 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=719, Unknown=0, NotChecked=0, Total=812 [2023-11-29 05:33:25,990 INFO L87 Difference]: Start difference. First operand 47 states and 49 transitions. Second operand has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 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 05:33:26,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:26,374 INFO L93 Difference]: Finished difference Result 69 states and 71 transitions. [2023-11-29 05:33:26,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 05:33:26,375 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 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 39 [2023-11-29 05:33:26,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:26,375 INFO L225 Difference]: With dead ends: 69 [2023-11-29 05:33:26,375 INFO L226 Difference]: Without dead ends: 51 [2023-11-29 05:33:26,376 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 107 GetRequests, 67 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=245, Invalid=1477, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 05:33:26,376 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 47 mSDsluCounter, 142 mSDsCounter, 0 mSdLazyCounter, 390 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 47 SdHoareTripleChecker+Valid, 156 SdHoareTripleChecker+Invalid, 397 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 390 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:26,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [47 Valid, 156 Invalid, 397 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 390 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 05:33:26,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-29 05:33:26,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 49. [2023-11-29 05:33:26,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 46 states have (on average 1.108695652173913) internal successors, (51), 48 states have internal predecessors, (51), 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 05:33:26,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 51 transitions. [2023-11-29 05:33:26,378 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 51 transitions. Word has length 39 [2023-11-29 05:33:26,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:26,379 INFO L495 AbstractCegarLoop]: Abstraction has 49 states and 51 transitions. [2023-11-29 05:33:26,379 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 29 states have (on average 2.206896551724138) internal successors, (64), 29 states have internal predecessors, (64), 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 05:33:26,379 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 51 transitions. [2023-11-29 05:33:26,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 05:33:26,379 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:26,379 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:26,385 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 05:33:26,580 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:26,580 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:26,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:26,580 INFO L85 PathProgramCache]: Analyzing trace with hash -520872337, now seen corresponding path program 4 times [2023-11-29 05:33:26,581 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:26,581 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645102462] [2023-11-29 05:33:26,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:26,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:26,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:26,874 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:33:26,874 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:26,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645102462] [2023-11-29 05:33:26,874 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645102462] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:26,874 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181508787] [2023-11-29 05:33:26,874 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:33:26,875 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:26,875 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:26,876 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:26,879 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 05:33:27,015 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:33:27,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:33:27,018 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 05:33:27,020 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:27,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2023-11-29 05:33:29,122 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:33:29,122 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 58 treesize of output 70 [2023-11-29 05:33:29,283 INFO L349 Elim1Store]: treesize reduction 8, result has 76.5 percent of original size [2023-11-29 05:33:29,283 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 4 select indices, 4 select index equivalence classes, 3 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 3 case distinctions, treesize of input 52 treesize of output 50 [2023-11-29 05:33:29,383 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 10 proven. 16 refuted. 1 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 05:33:29,383 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:30,497 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 05:33:30,498 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 3 select indices, 3 select index equivalence classes, 0 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 3 case distinctions, treesize of input 62 treesize of output 71 [2023-11-29 05:33:30,584 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 44 treesize of output 38 [2023-11-29 05:33:30,594 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 3 select indices, 3 select index equivalence classes, 3 disjoint index pairs (out of 3 index pairs), introduced 3 new quantified variables, introduced 0 case distinctions, treesize of input 68 treesize of output 58 [2023-11-29 05:33:30,603 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 05:33:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 45 backedges. 0 proven. 27 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 05:33:30,633 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181508787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:30,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:30,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 18, 18] total 42 [2023-11-29 05:33:30,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117969739] [2023-11-29 05:33:30,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:30,634 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 05:33:30,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:30,635 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 05:33:30,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=246, Invalid=1559, Unknown=1, NotChecked=0, Total=1806 [2023-11-29 05:33:30,637 INFO L87 Difference]: Start difference. First operand 49 states and 51 transitions. Second operand has 43 states, 42 states have (on average 2.0) internal successors, (84), 43 states have internal predecessors, (84), 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 05:33:34,994 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 05:33:37,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:37,462 INFO L93 Difference]: Finished difference Result 47 states and 49 transitions. [2023-11-29 05:33:37,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 05:33:37,463 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 42 states have (on average 2.0) internal successors, (84), 43 states have internal predecessors, (84), 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 41 [2023-11-29 05:33:37,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:37,463 INFO L225 Difference]: With dead ends: 47 [2023-11-29 05:33:37,463 INFO L226 Difference]: Without dead ends: 44 [2023-11-29 05:33:37,464 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 116 GetRequests, 48 SyntacticMatches, 1 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1043 ImplicationChecksByTransitivity, 4.9s TimeCoverageRelationStatistics Valid=865, Invalid=3826, Unknown=1, NotChecked=0, Total=4692 [2023-11-29 05:33:37,465 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 73 mSDsluCounter, 137 mSDsCounter, 0 mSdLazyCounter, 629 mSolverCounterSat, 4 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 73 SdHoareTripleChecker+Valid, 144 SdHoareTripleChecker+Invalid, 634 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 629 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:37,465 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [73 Valid, 144 Invalid, 634 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 629 Invalid, 1 Unknown, 0 Unchecked, 4.6s Time] [2023-11-29 05:33:37,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 44 states. [2023-11-29 05:33:37,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 44 to 44. [2023-11-29 05:33:37,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.069767441860465) internal successors, (46), 43 states have internal predecessors, (46), 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 05:33:37,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 46 transitions. [2023-11-29 05:33:37,466 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 46 transitions. Word has length 41 [2023-11-29 05:33:37,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:37,466 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 46 transitions. [2023-11-29 05:33:37,467 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 42 states have (on average 2.0) internal successors, (84), 43 states have internal predecessors, (84), 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 05:33:37,467 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 46 transitions. [2023-11-29 05:33:37,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 05:33:37,467 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 05:33:37,467 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:37,472 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 05:33:37,667 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:37,668 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 16 more)] === [2023-11-29 05:33:37,668 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 05:33:37,668 INFO L85 PathProgramCache]: Analyzing trace with hash 1952895040, now seen corresponding path program 4 times [2023-11-29 05:33:37,668 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 05:33:37,668 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963519294] [2023-11-29 05:33:37,668 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 05:33:37,668 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 05:33:37,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 05:33:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 9 trivial. 0 not checked. [2023-11-29 05:33:38,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 05:33:38,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963519294] [2023-11-29 05:33:38,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1963519294] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 05:33:38,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [456557146] [2023-11-29 05:33:38,016 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 05:33:38,016 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 05:33:38,016 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 05:33:38,017 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 05:33:38,018 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 05:33:38,114 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 05:33:38,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 05:33:38,116 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 05:33:38,118 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 05:33:38,157 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 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 14 treesize of output 10 [2023-11-29 05:33:39,197 INFO L349 Elim1Store]: treesize reduction 12, result has 73.3 percent of original size [2023-11-29 05:33:39,198 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 5 select indices, 5 select index equivalence classes, 6 disjoint index pairs (out of 10 index pairs), introduced 5 new quantified variables, introduced 4 case distinctions, treesize of input 62 treesize of output 61 [2023-11-29 05:33:39,335 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 18 proven. 16 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 05:33:39,335 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 05:33:40,141 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 59 treesize of output 51 [2023-11-29 05:33:40,154 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 4 select indices, 4 select index equivalence classes, 6 disjoint index pairs (out of 6 index pairs), introduced 4 new quantified variables, introduced 0 case distinctions, treesize of input 91 treesize of output 77 [2023-11-29 05:33:40,165 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 05:33:40,198 INFO L134 CoverageAnalysis]: Checked inductivity of 52 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 18 trivial. 0 not checked. [2023-11-29 05:33:40,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [456557146] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 05:33:40,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 05:33:40,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 16, 16] total 43 [2023-11-29 05:33:40,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893977516] [2023-11-29 05:33:40,199 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 05:33:40,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 05:33:40,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 05:33:40,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 05:33:40,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=237, Invalid=1569, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 05:33:40,201 INFO L87 Difference]: Start difference. First operand 44 states and 46 transitions. Second operand has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 43 states have internal predecessors, (96), 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 05:33:53,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 05:33:53,455 INFO L93 Difference]: Finished difference Result 78 states and 81 transitions. [2023-11-29 05:33:53,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 05:33:53,455 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 43 states have internal predecessors, (96), 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 43 [2023-11-29 05:33:53,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 05:33:53,456 INFO L225 Difference]: With dead ends: 78 [2023-11-29 05:33:53,456 INFO L226 Difference]: Without dead ends: 0 [2023-11-29 05:33:53,458 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 139 GetRequests, 56 SyntacticMatches, 1 SemanticMatches, 82 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1253 ImplicationChecksByTransitivity, 14.2s TimeCoverageRelationStatistics Valid=1258, Invalid=5714, Unknown=0, NotChecked=0, Total=6972 [2023-11-29 05:33:53,458 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 86 mSDsluCounter, 136 mSDsCounter, 0 mSdLazyCounter, 758 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 86 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 762 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 758 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 05:33:53,458 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [86 Valid, 142 Invalid, 762 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 758 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 05:33:53,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-29 05:33:53,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-29 05:33:53,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 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 05:33:53,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-29 05:33:53,459 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 43 [2023-11-29 05:33:53,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 05:33:53,459 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-29 05:33:53,459 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.2325581395348837) internal successors, (96), 43 states have internal predecessors, (96), 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 05:33:53,459 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-29 05:33:53,459 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-29 05:33:53,461 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 19 remaining) [2023-11-29 05:33:53,461 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 19 remaining) [2023-11-29 05:33:53,461 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (16 of 19 remaining) [2023-11-29 05:33:53,461 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (15 of 19 remaining) [2023-11-29 05:33:53,461 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (14 of 19 remaining) [2023-11-29 05:33:53,461 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (13 of 19 remaining) [2023-11-29 05:33:53,461 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 19 remaining) [2023-11-29 05:33:53,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 19 remaining) [2023-11-29 05:33:53,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 19 remaining) [2023-11-29 05:33:53,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 19 remaining) [2023-11-29 05:33:53,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr10REQUIRES_VIOLATIONMEMORY_DEREFERENCE (8 of 19 remaining) [2023-11-29 05:33:53,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr11REQUIRES_VIOLATIONMEMORY_DEREFERENCE (7 of 19 remaining) [2023-11-29 05:33:53,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr12REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 19 remaining) [2023-11-29 05:33:53,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr13REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 19 remaining) [2023-11-29 05:33:53,462 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr14REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 19 remaining) [2023-11-29 05:33:53,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr15REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 19 remaining) [2023-11-29 05:33:53,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr16REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 19 remaining) [2023-11-29 05:33:53,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr17REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 19 remaining) [2023-11-29 05:33:53,463 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr18ASSERT_VIOLATIONMEMORY_LEAK (0 of 19 remaining) [2023-11-29 05:33:53,467 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 05:33:53,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 05:33:53,666 INFO L445 BasicCegarLoop]: Path program histogram: [4, 4, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 05:33:53,667 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-29 05:33:53,670 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 29.11 05:33:53 BoogieIcfgContainer [2023-11-29 05:33:53,670 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-29 05:33:53,670 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-29 05:33:53,670 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-29 05:33:53,670 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-29 05:33:53,671 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 05:33:06" (3/4) ... [2023-11-29 05:33:53,672 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-29 05:33:53,678 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 19 nodes and edges [2023-11-29 05:33:53,678 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 5 nodes and edges [2023-11-29 05:33:53,679 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-29 05:33:53,679 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-29 05:33:53,761 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/witness.graphml [2023-11-29 05:33:53,762 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/witness.yml [2023-11-29 05:33:53,762 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-29 05:33:53,762 INFO L158 Benchmark]: Toolchain (without parser) took 47968.75ms. Allocated memory was 159.4MB in the beginning and 337.6MB in the end (delta: 178.3MB). Free memory was 113.6MB in the beginning and 214.3MB in the end (delta: -100.7MB). Peak memory consumption was 79.5MB. Max. memory is 16.1GB. [2023-11-29 05:33:53,763 INFO L158 Benchmark]: CDTParser took 0.18ms. Allocated memory is still 104.9MB. Free memory is still 55.4MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-29 05:33:53,763 INFO L158 Benchmark]: CACSL2BoogieTranslator took 426.63ms. Allocated memory is still 159.4MB. Free memory was 113.2MB in the beginning and 96.8MB in the end (delta: 16.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-29 05:33:53,763 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.11ms. Allocated memory is still 159.4MB. Free memory was 96.8MB in the beginning and 94.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 05:33:53,764 INFO L158 Benchmark]: Boogie Preprocessor took 46.38ms. Allocated memory is still 159.4MB. Free memory was 94.7MB in the beginning and 92.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-29 05:33:53,764 INFO L158 Benchmark]: RCFGBuilder took 455.26ms. Allocated memory is still 159.4MB. Free memory was 92.3MB in the beginning and 124.1MB in the end (delta: -31.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-29 05:33:53,764 INFO L158 Benchmark]: TraceAbstraction took 46896.16ms. Allocated memory was 159.4MB in the beginning and 337.6MB in the end (delta: 178.3MB). Free memory was 123.4MB in the beginning and 219.8MB in the end (delta: -96.4MB). Peak memory consumption was 84.2MB. Max. memory is 16.1GB. [2023-11-29 05:33:53,765 INFO L158 Benchmark]: Witness Printer took 91.75ms. Allocated memory is still 337.6MB. Free memory was 219.8MB in the beginning and 214.3MB in the end (delta: 5.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. [2023-11-29 05:33:53,766 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.18ms. Allocated memory is still 104.9MB. Free memory is still 55.4MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 426.63ms. Allocated memory is still 159.4MB. Free memory was 113.2MB in the beginning and 96.8MB in the end (delta: 16.5MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.11ms. Allocated memory is still 159.4MB. Free memory was 96.8MB in the beginning and 94.7MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 46.38ms. Allocated memory is still 159.4MB. Free memory was 94.7MB in the beginning and 92.3MB in the end (delta: 2.4MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 455.26ms. Allocated memory is still 159.4MB. Free memory was 92.3MB in the beginning and 124.1MB in the end (delta: -31.9MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * TraceAbstraction took 46896.16ms. Allocated memory was 159.4MB in the beginning and 337.6MB in the end (delta: 178.3MB). Free memory was 123.4MB in the beginning and 219.8MB in the end (delta: -96.4MB). Peak memory consumption was 84.2MB. Max. memory is 16.1GB. * Witness Printer took 91.75ms. Allocated memory is still 337.6MB. Free memory was 219.8MB in the beginning and 214.3MB in the end (delta: 5.5MB). Peak memory consumption was 6.3MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 525]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 40 locations, 19 error locations. Started 1 CEGAR loops. OverallTime: 46.8s, OverallIterations: 35, TraceHistogramMax: 4, PathProgramHistogramMax: 4, EmptinessCheckTime: 0.0s, AutomataDifference: 24.9s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 1 mSolverCounterUnknown, 1990 SdHoareTripleChecker+Valid, 7.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 1990 mSDsluCounter, 2632 SdHoareTripleChecker+Invalid, 7.4s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 2026 mSDsCounter, 73 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 4835 IncrementalHoareTripleChecker+Invalid, 4909 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 73 mSolverCounterUnsat, 606 mSDtfsCounter, 4835 mSolverCounterSat, 0.1s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1125 GetRequests, 573 SyntacticMatches, 17 SemanticMatches, 535 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4116 ImplicationChecksByTransitivity, 24.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=62occurred in iteration=10, InterpolantAutomatonStates: 336, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 35 MinimizatonAttempts, 243 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.8s SatisfiabilityAnalysisTime, 16.2s InterpolantComputationTime, 1021 NumberOfCodeBlocks, 1005 NumberOfCodeBlocksAsserted, 58 NumberOfCheckSat, 1321 ConstructedInterpolants, 46 QuantifiedInterpolants, 11984 SizeOfPredicates, 223 NumberOfNonLiveVariables, 2537 ConjunctsInSsa, 408 ConjunctsInUnsatCore, 63 InterpolantComputations, 22 PerfectInterpolantSequences, 323/800 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 19 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-29 05:33:53,834 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_d776f8a6-c160-4795-97ec-bf79717e3b2b/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Ended with exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Writing output log to file Ultimate.log Result: TRUE