./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-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-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/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_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/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_32a52e6e-8887-455d-b65f-e76d7b909573/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 3a34687129125cc08371e7bb78f7bdb7a4f5274a9b22928fd388f593b6db6995 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:33:37,162 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:33:37,224 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 02:33:37,228 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:33:37,228 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:33:37,262 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:33:37,262 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:33:37,263 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:33:37,263 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:33:37,264 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:33:37,265 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:33:37,265 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:33:37,266 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:33:37,266 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:33:37,267 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:33:37,268 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:33:37,268 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:33:37,269 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:33:37,269 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:33:37,270 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:33:37,270 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 02:33:37,271 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 02:33:37,271 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 02:33:37,272 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:33:37,272 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 02:33:37,273 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 02:33:37,273 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:33:37,274 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:33:37,274 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:33:37,274 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:33:37,275 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:33:37,275 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:33:37,276 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:33:37,289 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:33:37,289 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:33:37,289 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:33:37,290 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:33:37,290 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:33:37,290 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:33:37,290 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:33:37,290 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:33:37,290 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_32a52e6e-8887-455d-b65f-e76d7b909573/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 3a34687129125cc08371e7bb78f7bdb7a4f5274a9b22928fd388f593b6db6995 [2023-11-29 02:33:37,490 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:33:37,517 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:33:37,520 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:33:37,521 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:33:37,521 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:33:37,523 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i [2023-11-29 02:33:40,270 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:33:40,511 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:33:40,511 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/sv-benchmarks/c/array-memsafety/openbsd_cmemrchr-alloca-2.i [2023-11-29 02:33:40,525 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/data/6d193231d/7c38ba3028484d83ba9ac0187c474bb2/FLAG08af89eaf [2023-11-29 02:33:40,538 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/data/6d193231d/7c38ba3028484d83ba9ac0187c474bb2 [2023-11-29 02:33:40,541 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:33:40,542 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:33:40,544 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:33:40,544 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:33:40,549 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:33:40,549 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:33:40" (1/1) ... [2023-11-29 02:33:40,550 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@18b0a5d3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:40, skipping insertion in model container [2023-11-29 02:33:40,550 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:33:40" (1/1) ... [2023-11-29 02:33:40,590 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:33:40,821 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:33:40,832 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:33:40,864 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:33:40,892 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:33:40,892 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:40 WrapperNode [2023-11-29 02:33:40,892 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:33:40,893 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:33:40,894 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:33:40,894 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:33:40,901 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:40" (1/1) ... [2023-11-29 02:33:40,912 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:40" (1/1) ... [2023-11-29 02:33:40,934 INFO L138 Inliner]: procedures = 117, calls = 8, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 70 [2023-11-29 02:33:40,934 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:33:40,935 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:33:40,935 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:33:40,935 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:33:40,946 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:40" (1/1) ... [2023-11-29 02:33:40,946 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:40" (1/1) ... [2023-11-29 02:33:40,949 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:40" (1/1) ... [2023-11-29 02:33:40,962 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 1 writes are split as follows [1]. [2023-11-29 02:33:40,962 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:40" (1/1) ... [2023-11-29 02:33:40,962 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:40" (1/1) ... [2023-11-29 02:33:40,968 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:40" (1/1) ... [2023-11-29 02:33:40,971 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:40" (1/1) ... [2023-11-29 02:33:40,973 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:40" (1/1) ... [2023-11-29 02:33:40,974 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:40" (1/1) ... [2023-11-29 02:33:40,976 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:33:40,977 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:33:40,977 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:33:40,977 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:33:40,978 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:40" (1/1) ... [2023-11-29 02:33:40,984 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:33:40,994 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:41,007 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:33:41,013 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:33:41,038 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:33:41,038 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:33:41,038 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:33:41,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:33:41,038 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:33:41,039 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:33:41,130 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:33:41,132 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:33:41,265 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:33:41,289 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:33:41,289 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 02:33:41,289 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:33:41 BoogieIcfgContainer [2023-11-29 02:33:41,290 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:33:41,292 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:33:41,292 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:33:41,295 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:33:41,295 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:33:40" (1/3) ... [2023-11-29 02:33:41,296 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e99c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:33:41, skipping insertion in model container [2023-11-29 02:33:41,296 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:33:40" (2/3) ... [2023-11-29 02:33:41,297 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67e99c9d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:33:41, skipping insertion in model container [2023-11-29 02:33:41,297 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:33:41" (3/3) ... [2023-11-29 02:33:41,298 INFO L112 eAbstractionObserver]: Analyzing ICFG openbsd_cmemrchr-alloca-2.i [2023-11-29 02:33:41,316 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:33:41,316 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 5 error locations. [2023-11-29 02:33:41,360 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:33:41,366 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;@700f5304, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:33:41,367 INFO L358 AbstractCegarLoop]: Starting to check reachability of 5 error locations. [2023-11-29 02:33:41,371 INFO L276 IsEmpty]: Start isEmpty. Operand has 21 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 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 02:33:41,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 02:33:41,376 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:41,377 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 02:33:41,378 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:33:41,382 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:41,382 INFO L85 PathProgramCache]: Analyzing trace with hash -1369833435, now seen corresponding path program 1 times [2023-11-29 02:33:41,391 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:41,391 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1932683562] [2023-11-29 02:33:41,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:41,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:41,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:41,616 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 02:33:41,616 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:41,617 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1932683562] [2023-11-29 02:33:41,617 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1932683562] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:33:41,617 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:33:41,618 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:33:41,619 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39668365] [2023-11-29 02:33:41,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:33:41,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:33:41,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:41,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:33:41,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:33:41,655 INFO L87 Difference]: Start difference. First operand has 21 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 20 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 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 02:33:41,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:41,690 INFO L93 Difference]: Finished difference Result 20 states and 25 transitions. [2023-11-29 02:33:41,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:33:41,692 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 02:33:41,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:41,699 INFO L225 Difference]: With dead ends: 20 [2023-11-29 02:33:41,699 INFO L226 Difference]: Without dead ends: 19 [2023-11-29 02:33:41,701 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 02:33:41,705 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 15 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 13 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 15 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 13 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 13 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:41,706 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [15 Valid, 20 Invalid, 13 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 13 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:33:41,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-29 02:33:41,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 19. [2023-11-29 02:33:41,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 19 states, 15 states have (on average 1.6) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 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 02:33:41,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 19 states to 19 states and 24 transitions. [2023-11-29 02:33:41,735 INFO L78 Accepts]: Start accepts. Automaton has 19 states and 24 transitions. Word has length 6 [2023-11-29 02:33:41,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:41,735 INFO L495 AbstractCegarLoop]: Abstraction has 19 states and 24 transitions. [2023-11-29 02:33:41,735 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 02:33:41,736 INFO L276 IsEmpty]: Start isEmpty. Operand 19 states and 24 transitions. [2023-11-29 02:33:41,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 02:33:41,736 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:41,736 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 02:33:41,737 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:33:41,737 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:33:41,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:41,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1369833434, now seen corresponding path program 1 times [2023-11-29 02:33:41,738 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:41,738 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1316787186] [2023-11-29 02:33:41,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:41,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:41,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:42,023 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 02:33:42,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:42,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1316787186] [2023-11-29 02:33:42,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1316787186] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:33:42,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:33:42,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:33:42,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721793863] [2023-11-29 02:33:42,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:33:42,026 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:33:42,026 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:42,027 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:33:42,027 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:33:42,028 INFO L87 Difference]: Start difference. First operand 19 states and 24 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 02:33:42,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:42,123 INFO L93 Difference]: Finished difference Result 37 states and 45 transitions. [2023-11-29 02:33:42,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:33:42,123 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 02:33:42,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:42,124 INFO L225 Difference]: With dead ends: 37 [2023-11-29 02:33:42,125 INFO L226 Difference]: Without dead ends: 37 [2023-11-29 02:33:42,125 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:33:42,127 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 22 mSDsluCounter, 61 mSDsCounter, 0 mSdLazyCounter, 52 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 93 SdHoareTripleChecker+Invalid, 53 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 52 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:42,127 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 93 Invalid, 53 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 52 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:33:42,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-29 02:33:42,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 22. [2023-11-29 02:33:42,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 18 states have (on average 1.5) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 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 02:33:42,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-11-29 02:33:42,133 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 6 [2023-11-29 02:33:42,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:42,133 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-11-29 02:33:42,133 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 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 02:33:42,134 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-11-29 02:33:42,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 02:33:42,134 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:42,134 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 02:33:42,134 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:33:42,135 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:33:42,135 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:42,136 INFO L85 PathProgramCache]: Analyzing trace with hash -1369773852, now seen corresponding path program 1 times [2023-11-29 02:33:42,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:42,136 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802593332] [2023-11-29 02:33:42,136 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:42,136 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:42,151 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:42,325 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 02:33:42,325 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:42,325 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802593332] [2023-11-29 02:33:42,325 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802593332] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:33:42,326 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:33:42,326 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:33:42,326 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755106444] [2023-11-29 02:33:42,326 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:33:42,327 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:33:42,327 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:42,327 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:33:42,328 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:33:42,328 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 02:33:42,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:42,399 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2023-11-29 02:33:42,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:33:42,399 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 02:33:42,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:42,400 INFO L225 Difference]: With dead ends: 24 [2023-11-29 02:33:42,400 INFO L226 Difference]: Without dead ends: 24 [2023-11-29 02:33:42,401 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 02:33:42,402 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 23 mSDsluCounter, 26 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 23 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:42,403 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [23 Valid, 41 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:33:42,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-29 02:33:42,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 21. [2023-11-29 02:33:42,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 17 states have (on average 1.5294117647058822) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 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 02:33:42,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 26 transitions. [2023-11-29 02:33:42,407 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 26 transitions. Word has length 6 [2023-11-29 02:33:42,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:42,407 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 26 transitions. [2023-11-29 02:33:42,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.2) internal successors, (6), 5 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 02:33:42,408 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 26 transitions. [2023-11-29 02:33:42,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 02:33:42,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:42,408 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-29 02:33:42,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:33:42,409 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:33:42,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:42,410 INFO L85 PathProgramCache]: Analyzing trace with hash 2145075704, now seen corresponding path program 1 times [2023-11-29 02:33:42,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:42,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [761540147] [2023-11-29 02:33:42,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:42,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:42,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:42,473 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 02:33:42,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:42,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [761540147] [2023-11-29 02:33:42,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [761540147] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:33:42,474 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062232334] [2023-11-29 02:33:42,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:42,474 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:42,474 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:42,476 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:42,485 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:33:42,547 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:42,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 55 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-29 02:33:42,553 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:42,612 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:42,612 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-29 02:33:42,612 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1062232334] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:33:42,612 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-29 02:33:42,613 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [5] total 7 [2023-11-29 02:33:42,613 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19999639] [2023-11-29 02:33:42,613 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:33:42,614 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:33:42,614 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:42,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:33:42,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:33:42,615 INFO L87 Difference]: Start difference. First operand 21 states and 26 transitions. Second operand has 5 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 02:33:42,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:42,639 INFO L93 Difference]: Finished difference Result 37 states and 44 transitions. [2023-11-29 02:33:42,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:33:42,639 INFO L78 Accepts]: Start accepts. Automaton has has 5 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 02:33:42,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:42,640 INFO L225 Difference]: With dead ends: 37 [2023-11-29 02:33:42,640 INFO L226 Difference]: Without dead ends: 37 [2023-11-29 02:33:42,641 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:33:42,642 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 17 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 17 SdHoareTripleChecker+Valid, 44 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 02:33:42,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [17 Valid, 44 Invalid, 20 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:33:42,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-29 02:33:42,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 25. [2023-11-29 02:33:42,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.4285714285714286) internal successors, (30), 24 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 02:33:42,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 30 transitions. [2023-11-29 02:33:42,647 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 30 transitions. Word has length 8 [2023-11-29 02:33:42,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:42,647 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 30 transitions. [2023-11-29 02:33:42,647 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 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 02:33:42,647 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 30 transitions. [2023-11-29 02:33:42,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 02:33:42,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:42,648 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1] [2023-11-29 02:33:42,655 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:33:42,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:42,849 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:33:42,850 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:42,850 INFO L85 PathProgramCache]: Analyzing trace with hash -2092633290, now seen corresponding path program 1 times [2023-11-29 02:33:42,850 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:42,850 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475238536] [2023-11-29 02:33:42,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:42,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:42,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:43,051 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 02:33:43,051 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:43,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475238536] [2023-11-29 02:33:43,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1475238536] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:33:43,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [245472440] [2023-11-29 02:33:43,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:43,052 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:43,052 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:43,054 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:43,060 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:33:43,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:43,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 54 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:33:43,112 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:43,161 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 02:33:43,337 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 02:33:43,337 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:33:43,515 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 02:33:43,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [245472440] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:33:43,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:33:43,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-11-29 02:33:43,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684545167] [2023-11-29 02:33:43,516 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:33:43,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-29 02:33:43,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:43,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-29 02:33:43,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=148, Unknown=0, NotChecked=0, Total=210 [2023-11-29 02:33:43,518 INFO L87 Difference]: Start difference. First operand 25 states and 30 transitions. Second operand has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 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 02:33:43,638 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:43,638 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2023-11-29 02:33:43,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:33:43,639 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 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 02:33:43,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:43,640 INFO L225 Difference]: With dead ends: 24 [2023-11-29 02:33:43,640 INFO L226 Difference]: Without dead ends: 24 [2023-11-29 02:33:43,640 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=98, Invalid=208, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:33:43,641 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 34 mSDsluCounter, 36 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:43,642 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 50 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:33:43,643 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-29 02:33:43,645 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 23. [2023-11-29 02:33:43,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.4) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 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 02:33:43,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 28 transitions. [2023-11-29 02:33:43,646 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 28 transitions. Word has length 8 [2023-11-29 02:33:43,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:43,646 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 28 transitions. [2023-11-29 02:33:43,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.7142857142857142) internal successors, (24), 14 states have internal predecessors, (24), 0 states have call successors, (0), 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 02:33:43,646 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 28 transitions. [2023-11-29 02:33:43,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 02:33:43,647 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:43,647 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:33:43,652 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:33:43,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:43,849 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:33:43,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:43,849 INFO L85 PathProgramCache]: Analyzing trace with hash -869701947, now seen corresponding path program 1 times [2023-11-29 02:33:43,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:43,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1613441864] [2023-11-29 02:33:43,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:43,850 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:43,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:43,919 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 02:33:43,919 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:43,919 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1613441864] [2023-11-29 02:33:43,919 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1613441864] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:33:43,919 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:33:43,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:33:43,920 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296167660] [2023-11-29 02:33:43,920 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:33:43,920 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:33:43,920 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:43,921 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:33:43,921 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:33:43,921 INFO L87 Difference]: Start difference. First operand 23 states and 28 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 02:33:43,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:43,977 INFO L93 Difference]: Finished difference Result 24 states and 29 transitions. [2023-11-29 02:33:43,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 02:33:43,978 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 02:33:43,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:43,978 INFO L225 Difference]: With dead ends: 24 [2023-11-29 02:33:43,979 INFO L226 Difference]: Without dead ends: 24 [2023-11-29 02:33:43,979 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:33:43,980 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 31 mSDsluCounter, 29 mSDsCounter, 0 mSdLazyCounter, 38 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 31 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 40 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 38 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:43,980 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [31 Valid, 42 Invalid, 40 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 38 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:33:43,981 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-29 02:33:43,983 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 22. [2023-11-29 02:33:43,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 20 states have (on average 1.35) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 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 02:33:43,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 27 transitions. [2023-11-29 02:33:43,984 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 27 transitions. Word has length 11 [2023-11-29 02:33:43,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:43,984 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 27 transitions. [2023-11-29 02:33:43,984 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 02:33:43,984 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 27 transitions. [2023-11-29 02:33:43,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 02:33:43,985 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:43,985 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:33:43,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 02:33:43,985 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:33:43,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:43,986 INFO L85 PathProgramCache]: Analyzing trace with hash -869701946, now seen corresponding path program 1 times [2023-11-29 02:33:43,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:43,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610370630] [2023-11-29 02:33:43,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:43,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:44,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:44,256 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:44,256 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:44,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610370630] [2023-11-29 02:33:44,256 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610370630] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:33:44,256 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209759819] [2023-11-29 02:33:44,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:44,257 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:44,257 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:44,258 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:44,264 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:33:44,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:44,325 INFO L262 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 02:33:44,327 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:44,348 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-29 02:33:44,466 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:44,466 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:33:44,786 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 02:33:44,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [209759819] provided 1 perfect and 1 imperfect interpolant sequences [2023-11-29 02:33:44,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 2 imperfect interpolant sequences. [2023-11-29 02:33:44,786 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [7, 7] total 15 [2023-11-29 02:33:44,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1405309760] [2023-11-29 02:33:44,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:33:44,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-29 02:33:44,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:44,788 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-29 02:33:44,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=190, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:33:44,788 INFO L87 Difference]: Start difference. First operand 22 states and 27 transitions. Second operand has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 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 02:33:45,064 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:45,064 INFO L93 Difference]: Finished difference Result 38 states and 46 transitions. [2023-11-29 02:33:45,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:33:45,065 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 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 02:33:45,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:45,066 INFO L225 Difference]: With dead ends: 38 [2023-11-29 02:33:45,066 INFO L226 Difference]: Without dead ends: 38 [2023-11-29 02:33:45,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=103, Invalid=359, Unknown=0, NotChecked=0, Total=462 [2023-11-29 02:33:45,067 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 68 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 77 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 78 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 77 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:45,067 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 64 Invalid, 78 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 77 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:33:45,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2023-11-29 02:33:45,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 26. [2023-11-29 02:33:45,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.3333333333333333) internal successors, (32), 25 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:33:45,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 32 transitions. [2023-11-29 02:33:45,071 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 32 transitions. Word has length 11 [2023-11-29 02:33:45,071 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:45,072 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 32 transitions. [2023-11-29 02:33:45,072 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 8 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 02:33:45,072 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 32 transitions. [2023-11-29 02:33:45,072 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 02:33:45,072 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:45,073 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:33:45,077 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:33:45,273 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:45,275 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:33:45,276 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:45,276 INFO L85 PathProgramCache]: Analyzing trace with hash -189643576, now seen corresponding path program 1 times [2023-11-29 02:33:45,277 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:45,277 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [814515847] [2023-11-29 02:33:45,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:45,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:45,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:45,637 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 02:33:45,638 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:45,638 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [814515847] [2023-11-29 02:33:45,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [814515847] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:33:45,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:33:45,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 02:33:45,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56657387] [2023-11-29 02:33:45,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:33:45,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-29 02:33:45,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:45,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-29 02:33:45,639 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2023-11-29 02:33:45,640 INFO L87 Difference]: Start difference. First operand 26 states and 32 transitions. Second operand has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 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 02:33:45,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:45,819 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2023-11-29 02:33:45,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-29 02:33:45,820 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 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 02:33:45,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:45,821 INFO L225 Difference]: With dead ends: 31 [2023-11-29 02:33:45,821 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 02:33:45,821 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2023-11-29 02:33:45,822 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 29 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 66 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 66 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:45,822 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 38 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 66 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:33:45,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 02:33:45,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 24. [2023-11-29 02:33:45,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.3181818181818181) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 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 02:33:45,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-11-29 02:33:45,825 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 11 [2023-11-29 02:33:45,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:45,825 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-11-29 02:33:45,825 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 8 states have (on average 1.375) internal successors, (11), 8 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 02:33:45,825 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-11-29 02:33:45,826 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 02:33:45,826 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:45,826 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:33:45,826 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-29 02:33:45,826 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:33:45,827 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:45,827 INFO L85 PathProgramCache]: Analyzing trace with hash -1190219707, now seen corresponding path program 1 times [2023-11-29 02:33:45,827 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:45,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [807943853] [2023-11-29 02:33:45,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:45,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:45,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:45,884 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:33:45,884 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:45,884 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [807943853] [2023-11-29 02:33:45,885 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [807943853] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:33:45,885 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:33:45,885 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:33:45,885 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1297124487] [2023-11-29 02:33:45,885 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:33:45,885 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:33:45,885 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:45,886 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:33:45,886 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:33:45,886 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:33:45,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:45,924 INFO L93 Difference]: Finished difference Result 39 states and 46 transitions. [2023-11-29 02:33:45,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:33:45,925 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-29 02:33:45,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:45,925 INFO L225 Difference]: With dead ends: 39 [2023-11-29 02:33:45,926 INFO L226 Difference]: Without dead ends: 39 [2023-11-29 02:33:45,926 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 2 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 02:33:45,926 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 21 mSDsluCounter, 30 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 27 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:45,927 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 47 Invalid, 27 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:33:45,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-29 02:33:45,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 26. [2023-11-29 02:33:45,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 24 states have (on average 1.2916666666666667) internal successors, (31), 25 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:33:45,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-11-29 02:33:45,930 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 12 [2023-11-29 02:33:45,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:45,931 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-11-29 02:33:45,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.0) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:33:45,931 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-11-29 02:33:45,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 02:33:45,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:45,932 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:33:45,932 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 02:33:45,932 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:33:45,933 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:45,933 INFO L85 PathProgramCache]: Analyzing trace with hash -1583246717, now seen corresponding path program 1 times [2023-11-29 02:33:45,933 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:45,933 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805519131] [2023-11-29 02:33:45,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:45,933 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:45,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:46,000 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:33:46,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:46,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805519131] [2023-11-29 02:33:46,001 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805519131] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:33:46,001 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:33:46,001 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:33:46,001 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002704792] [2023-11-29 02:33:46,001 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:33:46,001 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:33:46,001 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:46,002 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:33:46,002 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:33:46,002 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:33:46,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:46,033 INFO L93 Difference]: Finished difference Result 28 states and 33 transitions. [2023-11-29 02:33:46,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:33:46,033 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-29 02:33:46,033 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:46,034 INFO L225 Difference]: With dead ends: 28 [2023-11-29 02:33:46,034 INFO L226 Difference]: Without dead ends: 28 [2023-11-29 02:33:46,034 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 02:33:46,035 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 22 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 23 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 02:33:46,035 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 23 Invalid, 21 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:33:46,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-29 02:33:46,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2023-11-29 02:33:46,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 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 02:33:46,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-29 02:33:46,038 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 12 [2023-11-29 02:33:46,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:46,038 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-29 02:33:46,039 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 2.4) internal successors, (12), 4 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:33:46,039 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-29 02:33:46,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 02:33:46,039 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:46,040 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:33:46,040 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 02:33:46,040 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:33:46,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:46,040 INFO L85 PathProgramCache]: Analyzing trace with hash -2047957140, now seen corresponding path program 1 times [2023-11-29 02:33:46,041 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:46,041 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499734165] [2023-11-29 02:33:46,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:46,041 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:46,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:46,121 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:33:46,122 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:46,122 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499734165] [2023-11-29 02:33:46,122 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1499734165] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:33:46,122 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:33:46,122 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:33:46,123 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1177616111] [2023-11-29 02:33:46,123 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:33:46,123 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:33:46,123 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:46,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:33:46,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:33:46,124 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 4 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 02:33:46,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:46,135 INFO L93 Difference]: Finished difference Result 23 states and 27 transitions. [2023-11-29 02:33:46,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:33:46,136 INFO L78 Accepts]: Start accepts. Automaton has has 4 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 02:33:46,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:46,136 INFO L225 Difference]: With dead ends: 23 [2023-11-29 02:33:46,137 INFO L226 Difference]: Without dead ends: 20 [2023-11-29 02:33:46,137 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 02:33:46,138 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 7 mSDsluCounter, 14 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 28 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:46,138 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 28 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:33:46,138 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-29 02:33:46,140 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-29 02:33:46,140 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 19 states have (on average 1.2105263157894737) internal successors, (23), 19 states have internal predecessors, (23), 0 states have call successors, (0), 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 02:33:46,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 23 transitions. [2023-11-29 02:33:46,141 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 23 transitions. Word has length 14 [2023-11-29 02:33:46,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:46,141 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 23 transitions. [2023-11-29 02:33:46,141 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 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 02:33:46,141 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 23 transitions. [2023-11-29 02:33:46,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 02:33:46,142 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:46,142 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:33:46,142 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 02:33:46,143 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:33:46,143 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:46,143 INFO L85 PathProgramCache]: Analyzing trace with hash 938543672, now seen corresponding path program 1 times [2023-11-29 02:33:46,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:46,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1726552213] [2023-11-29 02:33:46,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:46,143 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:46,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:46,242 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-29 02:33:46,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:46,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1726552213] [2023-11-29 02:33:46,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1726552213] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:33:46,243 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:33:46,243 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:33:46,243 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162095525] [2023-11-29 02:33:46,243 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:33:46,243 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:33:46,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:46,244 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:33:46,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:33:46,244 INFO L87 Difference]: Start difference. First operand 20 states and 23 transitions. Second operand has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:33:46,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:46,288 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2023-11-29 02:33:46,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:33:46,288 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-29 02:33:46,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:46,289 INFO L225 Difference]: With dead ends: 26 [2023-11-29 02:33:46,289 INFO L226 Difference]: Without dead ends: 16 [2023-11-29 02:33:46,289 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:33:46,290 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 5 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:46,290 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 30 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:33:46,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-29 02:33:46,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-29 02:33:46,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 15 states have (on average 1.2) internal successors, (18), 15 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 02:33:46,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 18 transitions. [2023-11-29 02:33:46,292 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 18 transitions. Word has length 15 [2023-11-29 02:33:46,292 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:46,293 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 18 transitions. [2023-11-29 02:33:46,293 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 3.0) internal successors, (15), 5 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:33:46,293 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 18 transitions. [2023-11-29 02:33:46,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-29 02:33:46,294 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:46,294 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:33:46,294 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 02:33:46,294 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:33:46,294 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:46,295 INFO L85 PathProgramCache]: Analyzing trace with hash 351737658, now seen corresponding path program 1 times [2023-11-29 02:33:46,295 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:46,295 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268503335] [2023-11-29 02:33:46,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:46,295 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:46,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:46,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:46,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:46,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268503335] [2023-11-29 02:33:46,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268503335] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:33:46,430 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [284732873] [2023-11-29 02:33:46,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:46,430 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:46,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:46,431 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:46,433 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:33:46,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:46,496 INFO L262 TraceCheckSpWp]: Trace formula consists of 101 conjuncts, 11 conjunts are in the unsatisfiable core [2023-11-29 02:33:46,498 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:46,539 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:46,539 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:33:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 2 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:46,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [284732873] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:33:46,667 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:33:46,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 16 [2023-11-29 02:33:46,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482721743] [2023-11-29 02:33:46,668 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:33:46,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-29 02:33:46,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:46,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-29 02:33:46,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2023-11-29 02:33:46,670 INFO L87 Difference]: Start difference. First operand 16 states and 18 transitions. Second operand has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:33:46,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:46,763 INFO L93 Difference]: Finished difference Result 25 states and 27 transitions. [2023-11-29 02:33:46,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:33:46,763 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-29 02:33:46,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:46,764 INFO L225 Difference]: With dead ends: 25 [2023-11-29 02:33:46,764 INFO L226 Difference]: Without dead ends: 19 [2023-11-29 02:33:46,764 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:33:46,765 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 41 mSDsluCounter, 33 mSDsCounter, 0 mSdLazyCounter, 58 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 40 SdHoareTripleChecker+Invalid, 60 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 58 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:46,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 40 Invalid, 60 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 58 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:33:46,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 19 states. [2023-11-29 02:33:46,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 19 to 18. [2023-11-29 02:33:46,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1764705882352942) internal successors, (20), 17 states have internal predecessors, (20), 0 states have call successors, (0), 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 02:33:46,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 20 transitions. [2023-11-29 02:33:46,768 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 20 transitions. Word has length 15 [2023-11-29 02:33:46,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:46,768 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 20 transitions. [2023-11-29 02:33:46,769 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 1.9375) internal successors, (31), 16 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:33:46,769 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 20 transitions. [2023-11-29 02:33:46,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 02:33:46,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:46,770 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:33:46,775 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-29 02:33:46,972 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:46,972 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:33:46,973 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:46,973 INFO L85 PathProgramCache]: Analyzing trace with hash 1161726248, now seen corresponding path program 2 times [2023-11-29 02:33:46,973 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:46,973 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [73107020] [2023-11-29 02:33:46,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:46,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:46,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:47,447 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:47,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:47,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [73107020] [2023-11-29 02:33:47,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [73107020] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:33:47,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1347210522] [2023-11-29 02:33:47,448 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:33:47,448 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:47,448 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:47,449 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:47,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:33:47,526 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:33:47,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:33:47,528 INFO L262 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 41 conjunts are in the unsatisfiable core [2023-11-29 02:33:47,530 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:47,540 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 02:33:47,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:47,955 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:33:48,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 4 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:48,721 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1347210522] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:33:48,721 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:33:48,721 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 9, 9] total 28 [2023-11-29 02:33:48,722 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1734115133] [2023-11-29 02:33:48,722 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:33:48,722 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:33:48,722 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:48,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:33:48,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=730, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:33:48,724 INFO L87 Difference]: Start difference. First operand 18 states and 20 transitions. Second operand has 29 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 29 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 02:33:49,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:49,820 INFO L93 Difference]: Finished difference Result 40 states and 43 transitions. [2023-11-29 02:33:49,820 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 02:33:49,820 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 29 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) Word has length 17 [2023-11-29 02:33:49,821 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:49,821 INFO L225 Difference]: With dead ends: 40 [2023-11-29 02:33:49,821 INFO L226 Difference]: Without dead ends: 40 [2023-11-29 02:33:49,822 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 325 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=301, Invalid=1861, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 02:33:49,823 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 93 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 323 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 93 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 323 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:49,823 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [93 Valid, 81 Invalid, 328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 323 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:33:49,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 40 states. [2023-11-29 02:33:49,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 40 to 22. [2023-11-29 02:33:49,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 21 states have internal predecessors, (24), 0 states have call successors, (0), 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 02:33:49,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 24 transitions. [2023-11-29 02:33:49,826 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 24 transitions. Word has length 17 [2023-11-29 02:33:49,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:49,827 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 24 transitions. [2023-11-29 02:33:49,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 1.6071428571428572) internal successors, (45), 29 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 02:33:49,827 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 24 transitions. [2023-11-29 02:33:49,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-29 02:33:49,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:49,828 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:33:49,833 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:33:50,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:50,029 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:33:50,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:50,029 INFO L85 PathProgramCache]: Analyzing trace with hash 50998170, now seen corresponding path program 3 times [2023-11-29 02:33:50,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:50,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626902230] [2023-11-29 02:33:50,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:50,030 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:50,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:50,200 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:50,200 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:50,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626902230] [2023-11-29 02:33:50,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1626902230] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:33:50,200 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271866061] [2023-11-29 02:33:50,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:33:50,201 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:50,201 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:50,202 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:50,208 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:33:50,296 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-29 02:33:50,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:33:50,297 INFO L262 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 16 conjunts are in the unsatisfiable core [2023-11-29 02:33:50,298 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:50,343 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:50,343 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:33:50,502 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 4 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:50,503 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271866061] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:33:50,503 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:33:50,503 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10, 10] total 20 [2023-11-29 02:33:50,503 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069064044] [2023-11-29 02:33:50,503 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:33:50,504 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2023-11-29 02:33:50,504 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:50,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2023-11-29 02:33:50,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=320, Unknown=0, NotChecked=0, Total=380 [2023-11-29 02:33:50,505 INFO L87 Difference]: Start difference. First operand 22 states and 24 transitions. Second operand has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 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 02:33:50,649 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:50,649 INFO L93 Difference]: Finished difference Result 35 states and 37 transitions. [2023-11-29 02:33:50,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 02:33:50,649 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 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 02:33:50,649 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:50,650 INFO L225 Difference]: With dead ends: 35 [2023-11-29 02:33:50,650 INFO L226 Difference]: Without dead ends: 25 [2023-11-29 02:33:50,650 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 32 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2023-11-29 02:33:50,651 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 20 mSDsluCounter, 108 mSDsCounter, 0 mSdLazyCounter, 143 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 118 SdHoareTripleChecker+Invalid, 146 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 143 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:50,652 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 118 Invalid, 146 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 143 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:33:50,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-29 02:33:50,653 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 24. [2023-11-29 02:33:50,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.1304347826086956) internal successors, (26), 23 states have internal predecessors, (26), 0 states have call successors, (0), 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 02:33:50,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 26 transitions. [2023-11-29 02:33:50,654 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 26 transitions. Word has length 21 [2023-11-29 02:33:50,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:50,655 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 26 transitions. [2023-11-29 02:33:50,655 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 20 states have (on average 2.05) internal successors, (41), 20 states have internal predecessors, (41), 0 states have call successors, (0), 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 02:33:50,655 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 26 transitions. [2023-11-29 02:33:50,656 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 02:33:50,656 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:50,656 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:33:50,660 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 02:33:50,860 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 02:33:50,860 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:33:50,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:50,861 INFO L85 PathProgramCache]: Analyzing trace with hash 1883501320, now seen corresponding path program 4 times [2023-11-29 02:33:50,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:50,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108249704] [2023-11-29 02:33:50,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:50,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:50,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:51,412 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:51,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:51,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108249704] [2023-11-29 02:33:51,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108249704] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:33:51,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1422518759] [2023-11-29 02:33:51,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:33:51,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:51,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:51,413 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:51,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:33:51,486 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:33:51,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:33:51,488 INFO L262 TraceCheckSpWp]: Trace formula consists of 147 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 02:33:51,491 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:51,499 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 02:33:51,987 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 0 proven. 17 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:51,988 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:33:53,030 INFO L134 CoverageAnalysis]: Checked inductivity of 17 backedges. 9 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:53,030 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1422518759] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:33:53,030 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:33:53,030 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 11, 11] total 35 [2023-11-29 02:33:53,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1034393618] [2023-11-29 02:33:53,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:33:53,031 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 02:33:53,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:53,032 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 02:33:53,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=1149, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 02:33:53,033 INFO L87 Difference]: Start difference. First operand 24 states and 26 transitions. Second operand has 36 states, 35 states have (on average 1.8) internal successors, (63), 36 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 02:33:54,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:54,207 INFO L93 Difference]: Finished difference Result 50 states and 53 transitions. [2023-11-29 02:33:54,208 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2023-11-29 02:33:54,208 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 35 states have (on average 1.8) internal successors, (63), 36 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 23 [2023-11-29 02:33:54,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:54,208 INFO L225 Difference]: With dead ends: 50 [2023-11-29 02:33:54,208 INFO L226 Difference]: Without dead ends: 50 [2023-11-29 02:33:54,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 583 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=426, Invalid=2996, Unknown=0, NotChecked=0, Total=3422 [2023-11-29 02:33:54,211 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 122 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 363 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 374 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 363 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:54,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 81 Invalid, 374 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 363 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:33:54,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2023-11-29 02:33:54,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 28. [2023-11-29 02:33:54,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 27 states have (on average 1.1111111111111112) internal successors, (30), 27 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 02:33:54,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 30 transitions. [2023-11-29 02:33:54,214 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 30 transitions. Word has length 23 [2023-11-29 02:33:54,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:54,215 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 30 transitions. [2023-11-29 02:33:54,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 35 states have (on average 1.8) internal successors, (63), 36 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 02:33:54,215 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 30 transitions. [2023-11-29 02:33:54,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2023-11-29 02:33:54,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:54,216 INFO L195 NwaCegarLoop]: trace histogram [4, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:33:54,220 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:33:54,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:54,416 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:33:54,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:54,417 INFO L85 PathProgramCache]: Analyzing trace with hash -142105222, now seen corresponding path program 5 times [2023-11-29 02:33:54,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:54,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290613585] [2023-11-29 02:33:54,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:54,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:54,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:54,657 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:54,657 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:54,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290613585] [2023-11-29 02:33:54,657 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [290613585] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:33:54,657 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086998067] [2023-11-29 02:33:54,657 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:33:54,657 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:54,658 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:54,659 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:54,666 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:33:54,850 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2023-11-29 02:33:54,850 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:33:54,851 INFO L262 TraceCheckSpWp]: Trace formula consists of 167 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 02:33:54,853 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:54,904 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:54,904 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:33:55,107 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 6 proven. 21 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:55,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2086998067] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:33:55,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:33:55,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12, 12] total 24 [2023-11-29 02:33:55,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898045295] [2023-11-29 02:33:55,107 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:33:55,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-29 02:33:55,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:55,108 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-29 02:33:55,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=482, Unknown=0, NotChecked=0, Total=552 [2023-11-29 02:33:55,109 INFO L87 Difference]: Start difference. First operand 28 states and 30 transitions. Second operand has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 02:33:55,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:55,282 INFO L93 Difference]: Finished difference Result 45 states and 47 transitions. [2023-11-29 02:33:55,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-29 02:33:55,282 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 27 [2023-11-29 02:33:55,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:55,282 INFO L225 Difference]: With dead ends: 45 [2023-11-29 02:33:55,283 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 02:33:55,283 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=120, Invalid=810, Unknown=0, NotChecked=0, Total=930 [2023-11-29 02:33:55,284 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 27 mSDsluCounter, 164 mSDsCounter, 0 mSdLazyCounter, 217 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 221 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 217 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:55,284 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 177 Invalid, 221 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 217 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:33:55,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 02:33:55,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 30. [2023-11-29 02:33:55,286 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.103448275862069) internal successors, (32), 29 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:33:55,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 32 transitions. [2023-11-29 02:33:55,286 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 32 transitions. Word has length 27 [2023-11-29 02:33:55,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:55,286 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 32 transitions. [2023-11-29 02:33:55,286 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 24 states have (on average 2.2083333333333335) internal successors, (53), 24 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 02:33:55,287 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 32 transitions. [2023-11-29 02:33:55,287 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 02:33:55,287 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:55,287 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:33:55,292 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 02:33:55,488 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 02:33:55,488 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:33:55,488 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:55,488 INFO L85 PathProgramCache]: Analyzing trace with hash -1996643736, now seen corresponding path program 6 times [2023-11-29 02:33:55,489 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:55,489 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [145590684] [2023-11-29 02:33:55,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:55,489 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:33:56,277 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 0 proven. 34 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:56,277 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:33:56,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [145590684] [2023-11-29 02:33:56,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [145590684] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:33:56,277 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023670813] [2023-11-29 02:33:56,277 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:33:56,277 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:33:56,277 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:33:56,278 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:33:56,280 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:33:56,476 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 02:33:56,476 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:33:56,478 INFO L262 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 54 conjunts are in the unsatisfiable core [2023-11-29 02:33:56,481 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:33:56,492 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:33:57,168 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 12 proven. 22 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:57,169 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:33:57,997 INFO L134 CoverageAnalysis]: Checked inductivity of 34 backedges. 16 proven. 18 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:33:57,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2023670813] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:33:57,997 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:33:57,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 13, 13] total 41 [2023-11-29 02:33:57,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [906049485] [2023-11-29 02:33:57,998 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:33:57,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 42 states [2023-11-29 02:33:57,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:33:57,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 42 interpolants. [2023-11-29 02:33:57,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=168, Invalid=1554, Unknown=0, NotChecked=0, Total=1722 [2023-11-29 02:33:57,999 INFO L87 Difference]: Start difference. First operand 30 states and 32 transitions. Second operand has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 42 states have internal predecessors, (81), 0 states have call successors, (0), 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 02:33:59,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:33:59,530 INFO L93 Difference]: Finished difference Result 60 states and 63 transitions. [2023-11-29 02:33:59,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 02:33:59,530 INFO L78 Accepts]: Start accepts. Automaton has has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 42 states have internal predecessors, (81), 0 states have call successors, (0), 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 29 [2023-11-29 02:33:59,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:33:59,531 INFO L225 Difference]: With dead ends: 60 [2023-11-29 02:33:59,531 INFO L226 Difference]: Without dead ends: 60 [2023-11-29 02:33:59,533 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 101 GetRequests, 33 SyntacticMatches, 0 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 771 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=607, Invalid=4223, Unknown=0, NotChecked=0, Total=4830 [2023-11-29 02:33:59,534 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 166 mSDsluCounter, 112 mSDsCounter, 0 mSdLazyCounter, 571 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 166 SdHoareTripleChecker+Valid, 119 SdHoareTripleChecker+Invalid, 585 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 571 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:33:59,534 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [166 Valid, 119 Invalid, 585 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 571 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:33:59,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2023-11-29 02:33:59,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 34. [2023-11-29 02:33:59,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 1.0909090909090908) internal successors, (36), 33 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:33:59,536 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 36 transitions. [2023-11-29 02:33:59,537 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 36 transitions. Word has length 29 [2023-11-29 02:33:59,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:33:59,537 INFO L495 AbstractCegarLoop]: Abstraction has 34 states and 36 transitions. [2023-11-29 02:33:59,537 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 42 states, 41 states have (on average 1.975609756097561) internal successors, (81), 42 states have internal predecessors, (81), 0 states have call successors, (0), 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 02:33:59,537 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 36 transitions. [2023-11-29 02:33:59,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 02:33:59,538 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:33:59,538 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:33:59,543 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:33:59,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 02:33:59,739 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:33:59,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:33:59,739 INFO L85 PathProgramCache]: Analyzing trace with hash -1290099494, now seen corresponding path program 7 times [2023-11-29 02:33:59,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:33:59,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1883638919] [2023-11-29 02:33:59,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:33:59,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:33:59,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:34:00,010 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:00,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:34:00,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1883638919] [2023-11-29 02:34:00,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1883638919] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:34:00,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1698673564] [2023-11-29 02:34:00,010 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:34:00,010 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:00,011 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:34:00,011 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:34:00,017 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:34:00,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:34:00,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 200 conjuncts, 24 conjunts are in the unsatisfiable core [2023-11-29 02:34:00,398 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:34:00,451 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:00,451 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:34:00,692 INFO L134 CoverageAnalysis]: Checked inductivity of 48 backedges. 8 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:00,692 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1698673564] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:34:00,692 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:34:00,692 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14, 14] total 28 [2023-11-29 02:34:00,692 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877919517] [2023-11-29 02:34:00,692 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:34:00,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 02:34:00,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:34:00,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 02:34:00,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=676, Unknown=0, NotChecked=0, Total=756 [2023-11-29 02:34:00,694 INFO L87 Difference]: Start difference. First operand 34 states and 36 transitions. Second operand has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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 02:34:00,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:34:00,981 INFO L93 Difference]: Finished difference Result 55 states and 57 transitions. [2023-11-29 02:34:00,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:34:00,981 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 states have internal predecessors, (65), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-29 02:34:00,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:34:00,982 INFO L225 Difference]: With dead ends: 55 [2023-11-29 02:34:00,982 INFO L226 Difference]: Without dead ends: 37 [2023-11-29 02:34:00,982 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 87 GetRequests, 52 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=143, Invalid=1189, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 02:34:00,983 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 35 mSDsluCounter, 253 mSDsCounter, 0 mSdLazyCounter, 316 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 269 SdHoareTripleChecker+Invalid, 321 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 316 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:34:00,983 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 269 Invalid, 321 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 316 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:34:00,984 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-29 02:34:00,985 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 36. [2023-11-29 02:34:00,985 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0857142857142856) 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 02:34:00,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 38 transitions. [2023-11-29 02:34:00,985 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 38 transitions. Word has length 33 [2023-11-29 02:34:00,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:34:00,985 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 38 transitions. [2023-11-29 02:34:00,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.3214285714285716) internal successors, (65), 28 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 02:34:00,985 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 38 transitions. [2023-11-29 02:34:00,986 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 02:34:00,986 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:34:00,986 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:34:00,991 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:34:01,186 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:01,187 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:34:01,187 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:34:01,187 INFO L85 PathProgramCache]: Analyzing trace with hash 1764669256, now seen corresponding path program 8 times [2023-11-29 02:34:01,187 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:34:01,187 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1835975537] [2023-11-29 02:34:01,187 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:01,187 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:34:01,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:34:01,965 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:01,966 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:34:01,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1835975537] [2023-11-29 02:34:01,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1835975537] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:34:01,966 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080920560] [2023-11-29 02:34:01,966 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:34:01,966 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:01,966 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:34:01,967 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:34:01,968 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:34:02,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:34:02,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:34:02,052 INFO L262 TraceCheckSpWp]: Trace formula consists of 213 conjuncts, 59 conjunts are in the unsatisfiable core [2023-11-29 02:34:02,054 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:34:02,062 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 02:34:02,719 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 57 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:02,720 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:34:04,109 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 25 proven. 32 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:04,109 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1080920560] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:34:04,110 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:34:04,110 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 15, 15] total 47 [2023-11-29 02:34:04,110 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944987898] [2023-11-29 02:34:04,110 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:34:04,110 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-29 02:34:04,110 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:34:04,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-29 02:34:04,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=162, Invalid=2094, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 02:34:04,112 INFO L87 Difference]: Start difference. First operand 36 states and 38 transitions. Second operand has 48 states, 47 states have (on average 2.106382978723404) internal successors, (99), 48 states have internal predecessors, (99), 0 states have call successors, (0), 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 02:34:05,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:34:05,910 INFO L93 Difference]: Finished difference Result 70 states and 73 transitions. [2023-11-29 02:34:05,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 02:34:05,911 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 47 states have (on average 2.106382978723404) internal successors, (99), 48 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 35 [2023-11-29 02:34:05,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:34:05,912 INFO L225 Difference]: With dead ends: 70 [2023-11-29 02:34:05,912 INFO L226 Difference]: Without dead ends: 70 [2023-11-29 02:34:05,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 117 GetRequests, 41 SyntacticMatches, 0 SemanticMatches, 76 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1160 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=652, Invalid=5354, Unknown=0, NotChecked=0, Total=6006 [2023-11-29 02:34:05,914 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 159 mSDsluCounter, 204 mSDsCounter, 0 mSdLazyCounter, 1007 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 159 SdHoareTripleChecker+Valid, 212 SdHoareTripleChecker+Invalid, 1013 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1007 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:34:05,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [159 Valid, 212 Invalid, 1013 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1007 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:34:05,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-29 02:34:05,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 40. [2023-11-29 02:34:05,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 1.0769230769230769) 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 02:34:05,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 42 transitions. [2023-11-29 02:34:05,916 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 42 transitions. Word has length 35 [2023-11-29 02:34:05,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:34:05,916 INFO L495 AbstractCegarLoop]: Abstraction has 40 states and 42 transitions. [2023-11-29 02:34:05,917 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 47 states have (on average 2.106382978723404) internal successors, (99), 48 states have internal predecessors, (99), 0 states have call successors, (0), 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 02:34:05,917 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 42 transitions. [2023-11-29 02:34:05,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-29 02:34:05,917 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:34:05,917 INFO L195 NwaCegarLoop]: trace histogram [6, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:34:05,922 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 02:34:06,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:06,118 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:34:06,118 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:34:06,118 INFO L85 PathProgramCache]: Analyzing trace with hash 955664826, now seen corresponding path program 9 times [2023-11-29 02:34:06,118 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:34:06,118 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116273788] [2023-11-29 02:34:06,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:06,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:34:06,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:34:06,426 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:06,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:34:06,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116273788] [2023-11-29 02:34:06,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2116273788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:34:06,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1087618776] [2023-11-29 02:34:06,427 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:34:06,427 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:06,427 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:34:06,428 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:34:06,431 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:34:06,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2023-11-29 02:34:06,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:34:06,823 INFO L262 TraceCheckSpWp]: Trace formula consists of 233 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 02:34:06,825 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:34:06,914 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 10 proven. 65 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:06,914 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:34:07,840 INFO L134 CoverageAnalysis]: Checked inductivity of 75 backedges. 22 proven. 53 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:07,841 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1087618776] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:34:07,841 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:34:07,841 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 18, 18] total 36 [2023-11-29 02:34:07,841 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264415558] [2023-11-29 02:34:07,841 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:34:07,841 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 02:34:07,841 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:34:07,842 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 02:34:07,842 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1121, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 02:34:07,842 INFO L87 Difference]: Start difference. First operand 40 states and 42 transitions. Second operand has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 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 02:34:08,488 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:34:08,488 INFO L93 Difference]: Finished difference Result 65 states and 67 transitions. [2023-11-29 02:34:08,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 02:34:08,489 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 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 02:34:08,489 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:34:08,489 INFO L225 Difference]: With dead ends: 65 [2023-11-29 02:34:08,489 INFO L226 Difference]: Without dead ends: 43 [2023-11-29 02:34:08,490 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 106 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=270, Invalid=2180, Unknown=0, NotChecked=0, Total=2450 [2023-11-29 02:34:08,491 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 44 mSDsluCounter, 221 mSDsCounter, 0 mSdLazyCounter, 343 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 238 SdHoareTripleChecker+Invalid, 348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 343 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:34:08,491 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 238 Invalid, 348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 343 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:34:08,491 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-29 02:34:08,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 42. [2023-11-29 02:34:08,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.0731707317073171) internal successors, (44), 41 states have internal predecessors, (44), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:34:08,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 44 transitions. [2023-11-29 02:34:08,493 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 44 transitions. Word has length 39 [2023-11-29 02:34:08,493 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:34:08,494 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 44 transitions. [2023-11-29 02:34:08,494 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.25) internal successors, (81), 36 states have internal predecessors, (81), 0 states have call successors, (0), 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 02:34:08,494 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 44 transitions. [2023-11-29 02:34:08,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 02:34:08,494 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:34:08,494 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:34:08,499 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:34:08,695 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:08,695 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:34:08,695 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:34:08,696 INFO L85 PathProgramCache]: Analyzing trace with hash -81636952, now seen corresponding path program 10 times [2023-11-29 02:34:08,696 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:34:08,696 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942511782] [2023-11-29 02:34:08,696 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:08,696 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:34:08,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:34:09,809 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:09,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:34:09,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942511782] [2023-11-29 02:34:09,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942511782] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:34:09,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [178203776] [2023-11-29 02:34:09,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:34:09,810 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:09,810 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:34:09,811 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:34:09,820 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:34:09,944 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:34:09,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:34:09,948 INFO L262 TraceCheckSpWp]: Trace formula consists of 246 conjuncts, 71 conjunts are in the unsatisfiable core [2023-11-29 02:34:09,950 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:34:09,961 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:34:11,127 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 0 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:11,128 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:34:12,582 INFO L134 CoverageAnalysis]: Checked inductivity of 86 backedges. 36 proven. 50 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:12,582 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [178203776] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:34:12,583 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:34:12,583 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 18, 18] total 55 [2023-11-29 02:34:12,583 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728612521] [2023-11-29 02:34:12,583 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:34:12,583 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-29 02:34:12,583 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:34:12,584 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-29 02:34:12,585 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=2830, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 02:34:12,585 INFO L87 Difference]: Start difference. First operand 42 states and 44 transitions. Second operand has 56 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 56 states have internal predecessors, (117), 0 states have call successors, (0), 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 02:34:15,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:34:15,337 INFO L93 Difference]: Finished difference Result 80 states and 83 transitions. [2023-11-29 02:34:15,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 02:34:15,339 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 56 states have internal predecessors, (117), 0 states have call successors, (0), 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 02:34:15,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:34:15,340 INFO L225 Difference]: With dead ends: 80 [2023-11-29 02:34:15,340 INFO L226 Difference]: Without dead ends: 80 [2023-11-29 02:34:15,343 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 47 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1031 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=888, Invalid=7302, Unknown=0, NotChecked=0, Total=8190 [2023-11-29 02:34:15,344 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 158 mSDsluCounter, 207 mSDsCounter, 0 mSdLazyCounter, 1052 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 158 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 1074 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1052 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:34:15,344 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [158 Valid, 216 Invalid, 1074 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1052 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:34:15,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2023-11-29 02:34:15,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 46. [2023-11-29 02:34:15,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.0666666666666667) internal successors, (48), 45 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 02:34:15,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 48 transitions. [2023-11-29 02:34:15,346 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 48 transitions. Word has length 41 [2023-11-29 02:34:15,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:34:15,346 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 48 transitions. [2023-11-29 02:34:15,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 55 states have (on average 2.1272727272727274) internal successors, (117), 56 states have internal predecessors, (117), 0 states have call successors, (0), 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 02:34:15,346 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 48 transitions. [2023-11-29 02:34:15,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 46 [2023-11-29 02:34:15,347 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:34:15,347 INFO L195 NwaCegarLoop]: trace histogram [7, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:34:15,353 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:34:15,547 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 02:34:15,547 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:34:15,548 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:34:15,548 INFO L85 PathProgramCache]: Analyzing trace with hash 416658458, now seen corresponding path program 11 times [2023-11-29 02:34:15,548 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:34:15,548 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290487513] [2023-11-29 02:34:15,548 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:15,548 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:34:15,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:34:15,855 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:15,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:34:15,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290487513] [2023-11-29 02:34:15,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290487513] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:34:15,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157937248] [2023-11-29 02:34:15,855 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:34:15,855 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:15,855 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:34:15,857 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:34:15,859 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:34:16,263 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2023-11-29 02:34:16,263 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:34:16,266 INFO L262 TraceCheckSpWp]: Trace formula consists of 266 conjuncts, 32 conjunts are in the unsatisfiable core [2023-11-29 02:34:16,267 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:34:16,333 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:16,333 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:34:16,744 INFO L134 CoverageAnalysis]: Checked inductivity of 108 backedges. 12 proven. 96 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:16,744 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157937248] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:34:16,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:34:16,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18, 18] total 36 [2023-11-29 02:34:16,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126217679] [2023-11-29 02:34:16,745 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:34:16,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 36 states [2023-11-29 02:34:16,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:34:16,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 36 interpolants. [2023-11-29 02:34:16,746 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=1160, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 02:34:16,746 INFO L87 Difference]: Start difference. First operand 46 states and 48 transitions. Second operand has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 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 02:34:17,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:34:17,174 INFO L93 Difference]: Finished difference Result 75 states and 77 transitions. [2023-11-29 02:34:17,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 02:34:17,174 INFO L78 Accepts]: Start accepts. Automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 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 45 [2023-11-29 02:34:17,174 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:34:17,175 INFO L225 Difference]: With dead ends: 75 [2023-11-29 02:34:17,175 INFO L226 Difference]: Without dead ends: 49 [2023-11-29 02:34:17,176 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 119 GetRequests, 72 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 289 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=189, Invalid=2163, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 02:34:17,176 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 76 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 525 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 76 SdHoareTripleChecker+Valid, 451 SdHoareTripleChecker+Invalid, 532 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 525 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:34:17,177 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [76 Valid, 451 Invalid, 532 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 525 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:34:17,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-29 02:34:17,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-11-29 02:34:17,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0638297872340425) internal successors, (50), 47 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 02:34:17,179 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 50 transitions. [2023-11-29 02:34:17,179 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 50 transitions. Word has length 45 [2023-11-29 02:34:17,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:34:17,179 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 50 transitions. [2023-11-29 02:34:17,179 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 36 states, 36 states have (on average 2.4722222222222223) internal successors, (89), 36 states have internal predecessors, (89), 0 states have call successors, (0), 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 02:34:17,179 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 50 transitions. [2023-11-29 02:34:17,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 02:34:17,180 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:34:17,180 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:34:17,185 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 02:34:17,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 02:34:17,381 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:34:17,381 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:34:17,381 INFO L85 PathProgramCache]: Analyzing trace with hash 61575560, now seen corresponding path program 12 times [2023-11-29 02:34:17,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:34:17,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344653109] [2023-11-29 02:34:17,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:17,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:34:17,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:34:18,447 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:18,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:34:18,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344653109] [2023-11-29 02:34:18,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344653109] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:34:18,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [285605860] [2023-11-29 02:34:18,447 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:34:18,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:18,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:34:18,448 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:34:18,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:34:18,979 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2023-11-29 02:34:18,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:34:18,982 INFO L262 TraceCheckSpWp]: Trace formula consists of 279 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-29 02:34:18,984 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:34:19,019 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:34:19,887 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:19,887 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:34:21,978 INFO L134 CoverageAnalysis]: Checked inductivity of 121 backedges. 0 proven. 121 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:21,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [285605860] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:34:21,979 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:34:21,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 21, 20] total 61 [2023-11-29 02:34:21,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [117260911] [2023-11-29 02:34:21,979 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:34:21,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 62 states [2023-11-29 02:34:21,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:34:21,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 62 interpolants. [2023-11-29 02:34:21,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=290, Invalid=3492, Unknown=0, NotChecked=0, Total=3782 [2023-11-29 02:34:21,981 INFO L87 Difference]: Start difference. First operand 48 states and 50 transitions. Second operand has 62 states, 61 states have (on average 2.2295081967213113) internal successors, (136), 62 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:34:26,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:34:26,481 INFO L93 Difference]: Finished difference Result 121 states and 125 transitions. [2023-11-29 02:34:26,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-29 02:34:26,481 INFO L78 Accepts]: Start accepts. Automaton has has 62 states, 61 states have (on average 2.2295081967213113) internal successors, (136), 62 states have internal predecessors, (136), 0 states have call successors, (0), 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 47 [2023-11-29 02:34:26,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:34:26,482 INFO L225 Difference]: With dead ends: 121 [2023-11-29 02:34:26,482 INFO L226 Difference]: Without dead ends: 121 [2023-11-29 02:34:26,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 54 SyntacticMatches, 1 SemanticMatches, 128 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3592 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=1615, Invalid=15155, Unknown=0, NotChecked=0, Total=16770 [2023-11-29 02:34:26,488 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 765 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 1726 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 765 SdHoareTripleChecker+Valid, 350 SdHoareTripleChecker+Invalid, 1752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1726 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:34:26,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [765 Valid, 350 Invalid, 1752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1726 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 02:34:26,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-29 02:34:26,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 106. [2023-11-29 02:34:26,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0952380952380953) internal successors, (115), 105 states have internal predecessors, (115), 0 states have call successors, (0), 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 02:34:26,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 115 transitions. [2023-11-29 02:34:26,492 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 115 transitions. Word has length 47 [2023-11-29 02:34:26,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:34:26,492 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 115 transitions. [2023-11-29 02:34:26,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 62 states, 61 states have (on average 2.2295081967213113) internal successors, (136), 62 states have internal predecessors, (136), 0 states have call successors, (0), 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 02:34:26,492 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 115 transitions. [2023-11-29 02:34:26,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-29 02:34:26,493 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:34:26,493 INFO L195 NwaCegarLoop]: trace histogram [8, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:34:26,498 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 02:34:26,693 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 02:34:26,694 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:34:26,694 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:34:26,694 INFO L85 PathProgramCache]: Analyzing trace with hash 956040186, now seen corresponding path program 13 times [2023-11-29 02:34:26,694 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:34:26,694 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [234518455] [2023-11-29 02:34:26,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:26,695 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:34:26,727 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:34:27,082 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:27,082 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:34:27,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [234518455] [2023-11-29 02:34:27,082 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [234518455] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:34:27,083 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798012071] [2023-11-29 02:34:27,083 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:34:27,083 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:27,083 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:34:27,084 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:34:27,086 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:34:27,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:34:27,227 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 36 conjunts are in the unsatisfiable core [2023-11-29 02:34:27,228 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:34:27,308 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:27,308 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:34:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 147 backedges. 14 proven. 133 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:27,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1798012071] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:34:27,808 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:34:27,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20, 20] total 40 [2023-11-29 02:34:27,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043076406] [2023-11-29 02:34:27,808 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:34:27,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 02:34:27,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:34:27,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 02:34:27,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=1450, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 02:34:27,810 INFO L87 Difference]: Start difference. First operand 106 states and 115 transitions. Second operand has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 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 02:34:28,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:34:28,341 INFO L93 Difference]: Finished difference Result 85 states and 87 transitions. [2023-11-29 02:34:28,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2023-11-29 02:34:28,341 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 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 51 [2023-11-29 02:34:28,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:34:28,342 INFO L225 Difference]: With dead ends: 85 [2023-11-29 02:34:28,342 INFO L226 Difference]: Without dead ends: 55 [2023-11-29 02:34:28,342 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 135 GetRequests, 82 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=212, Invalid=2758, Unknown=0, NotChecked=0, Total=2970 [2023-11-29 02:34:28,343 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 117 mSDsluCounter, 490 mSDsCounter, 0 mSdLazyCounter, 574 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 515 SdHoareTripleChecker+Invalid, 583 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 574 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:34:28,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 515 Invalid, 583 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 574 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:34:28,343 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2023-11-29 02:34:28,344 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 54. [2023-11-29 02:34:28,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0566037735849056) internal successors, (56), 53 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:34:28,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 56 transitions. [2023-11-29 02:34:28,345 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 56 transitions. Word has length 51 [2023-11-29 02:34:28,345 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:34:28,345 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 56 transitions. [2023-11-29 02:34:28,345 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.525) internal successors, (101), 40 states have internal predecessors, (101), 0 states have call successors, (0), 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 02:34:28,345 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 56 transitions. [2023-11-29 02:34:28,345 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 02:34:28,345 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:34:28,346 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:34:28,350 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 02:34:28,546 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-29 02:34:28,546 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:34:28,546 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:34:28,546 INFO L85 PathProgramCache]: Analyzing trace with hash 1814402792, now seen corresponding path program 14 times [2023-11-29 02:34:28,547 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:34:28,547 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [662983890] [2023-11-29 02:34:28,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:28,547 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:34:28,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:34:29,639 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:29,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:34:29,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [662983890] [2023-11-29 02:34:29,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [662983890] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:34:29,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [613694131] [2023-11-29 02:34:29,639 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:34:29,639 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:29,639 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:34:29,640 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:34:29,642 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 02:34:29,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:34:29,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:34:29,740 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 77 conjunts are in the unsatisfiable core [2023-11-29 02:34:29,742 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:34:29,747 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 02:34:30,784 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 0 proven. 162 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:30,784 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:34:32,845 INFO L134 CoverageAnalysis]: Checked inductivity of 162 backedges. 64 proven. 98 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:32,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [613694131] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:34:32,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:34:32,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 21, 21] total 65 [2023-11-29 02:34:32,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725431457] [2023-11-29 02:34:32,845 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:34:32,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 66 states [2023-11-29 02:34:32,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:34:32,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 66 interpolants. [2023-11-29 02:34:32,846 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=267, Invalid=4023, Unknown=0, NotChecked=0, Total=4290 [2023-11-29 02:34:32,847 INFO L87 Difference]: Start difference. First operand 54 states and 56 transitions. Second operand has 66 states, 65 states have (on average 2.353846153846154) internal successors, (153), 66 states have internal predecessors, (153), 0 states have call successors, (0), 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 02:34:35,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:34:35,429 INFO L93 Difference]: Finished difference Result 100 states and 103 transitions. [2023-11-29 02:34:35,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-29 02:34:35,430 INFO L78 Accepts]: Start accepts. Automaton has has 66 states, 65 states have (on average 2.353846153846154) internal successors, (153), 66 states have internal predecessors, (153), 0 states have call successors, (0), 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 53 [2023-11-29 02:34:35,430 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:34:35,430 INFO L225 Difference]: With dead ends: 100 [2023-11-29 02:34:35,430 INFO L226 Difference]: Without dead ends: 100 [2023-11-29 02:34:35,431 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 65 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2366 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1129, Invalid=10427, Unknown=0, NotChecked=0, Total=11556 [2023-11-29 02:34:35,431 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 230 mSDsluCounter, 366 mSDsCounter, 0 mSdLazyCounter, 1840 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 230 SdHoareTripleChecker+Valid, 377 SdHoareTripleChecker+Invalid, 1847 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1840 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:34:35,431 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [230 Valid, 377 Invalid, 1847 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1840 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:34:35,432 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2023-11-29 02:34:35,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 58. [2023-11-29 02:34:35,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 1.0526315789473684) internal successors, (60), 57 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:34:35,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 60 transitions. [2023-11-29 02:34:35,433 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 60 transitions. Word has length 53 [2023-11-29 02:34:35,434 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:34:35,434 INFO L495 AbstractCegarLoop]: Abstraction has 58 states and 60 transitions. [2023-11-29 02:34:35,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 66 states, 65 states have (on average 2.353846153846154) internal successors, (153), 66 states have internal predecessors, (153), 0 states have call successors, (0), 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 02:34:35,434 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 60 transitions. [2023-11-29 02:34:35,435 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-29 02:34:35,435 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:34:35,435 INFO L195 NwaCegarLoop]: trace histogram [9, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:34:35,439 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 02:34:35,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 02:34:35,635 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:34:35,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:34:35,636 INFO L85 PathProgramCache]: Analyzing trace with hash 540301658, now seen corresponding path program 15 times [2023-11-29 02:34:35,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:34:35,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614499816] [2023-11-29 02:34:35,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:35,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:34:35,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:34:36,079 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 16 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:36,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:34:36,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614499816] [2023-11-29 02:34:36,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [614499816] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:34:36,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169079787] [2023-11-29 02:34:36,079 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:34:36,079 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:36,080 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:34:36,080 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:34:36,081 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 02:34:36,330 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2023-11-29 02:34:36,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:34:36,333 INFO L262 TraceCheckSpWp]: Trace formula consists of 332 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 02:34:36,334 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:34:36,414 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 16 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:36,414 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:34:37,015 INFO L134 CoverageAnalysis]: Checked inductivity of 192 backedges. 16 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:37,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [169079787] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:34:37,015 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:34:37,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22, 22] total 44 [2023-11-29 02:34:37,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [997392958] [2023-11-29 02:34:37,016 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:34:37,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 44 states [2023-11-29 02:34:37,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:34:37,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 44 interpolants. [2023-11-29 02:34:37,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=1772, Unknown=0, NotChecked=0, Total=1892 [2023-11-29 02:34:37,017 INFO L87 Difference]: Start difference. First operand 58 states and 60 transitions. Second operand has 44 states, 44 states have (on average 2.5681818181818183) internal successors, (113), 44 states have internal predecessors, (113), 0 states have call successors, (0), 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 02:34:37,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:34:37,672 INFO L93 Difference]: Finished difference Result 95 states and 97 transitions. [2023-11-29 02:34:37,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 02:34:37,672 INFO L78 Accepts]: Start accepts. Automaton has has 44 states, 44 states have (on average 2.5681818181818183) internal successors, (113), 44 states have internal predecessors, (113), 0 states have call successors, (0), 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 57 [2023-11-29 02:34:37,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:34:37,673 INFO L225 Difference]: With dead ends: 95 [2023-11-29 02:34:37,673 INFO L226 Difference]: Without dead ends: 61 [2023-11-29 02:34:37,673 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 151 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=235, Invalid=3425, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 02:34:37,674 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 68 mSDsluCounter, 716 mSDsCounter, 0 mSdLazyCounter, 851 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 68 SdHoareTripleChecker+Valid, 744 SdHoareTripleChecker+Invalid, 859 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 851 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:34:37,674 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [68 Valid, 744 Invalid, 859 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 851 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:34:37,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2023-11-29 02:34:37,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 60. [2023-11-29 02:34:37,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0508474576271187) internal successors, (62), 59 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 02:34:37,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 62 transitions. [2023-11-29 02:34:37,676 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 62 transitions. Word has length 57 [2023-11-29 02:34:37,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:34:37,676 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 62 transitions. [2023-11-29 02:34:37,676 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 44 states, 44 states have (on average 2.5681818181818183) internal successors, (113), 44 states have internal predecessors, (113), 0 states have call successors, (0), 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 02:34:37,676 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 62 transitions. [2023-11-29 02:34:37,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 02:34:37,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:34:37,676 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:34:37,681 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 02:34:37,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 02:34:37,877 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:34:37,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:34:37,877 INFO L85 PathProgramCache]: Analyzing trace with hash 208896456, now seen corresponding path program 16 times [2023-11-29 02:34:37,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:34:37,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1409763558] [2023-11-29 02:34:37,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:37,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:34:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:34:39,230 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:39,230 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:34:39,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1409763558] [2023-11-29 02:34:39,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1409763558] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:34:39,230 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113892029] [2023-11-29 02:34:39,231 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:34:39,231 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:39,231 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:34:39,232 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:34:39,233 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 02:34:39,370 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:34:39,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:34:39,374 INFO L262 TraceCheckSpWp]: Trace formula consists of 345 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-29 02:34:39,377 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:34:39,383 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 02:34:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 0 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:40,903 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:34:43,375 INFO L134 CoverageAnalysis]: Checked inductivity of 209 backedges. 81 proven. 128 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:43,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2113892029] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:34:43,376 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:34:43,376 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 23, 23] total 63 [2023-11-29 02:34:43,376 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529150178] [2023-11-29 02:34:43,376 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:34:43,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-29 02:34:43,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:34:43,377 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-29 02:34:43,377 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=335, Invalid=3697, Unknown=0, NotChecked=0, Total=4032 [2023-11-29 02:34:43,378 INFO L87 Difference]: Start difference. First operand 60 states and 62 transitions. Second operand has 64 states, 63 states have (on average 2.492063492063492) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 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 02:34:47,282 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:34:47,282 INFO L93 Difference]: Finished difference Result 110 states and 113 transitions. [2023-11-29 02:34:47,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-29 02:34:47,283 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 63 states have (on average 2.492063492063492) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 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 59 [2023-11-29 02:34:47,283 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:34:47,284 INFO L225 Difference]: With dead ends: 110 [2023-11-29 02:34:47,284 INFO L226 Difference]: Without dead ends: 110 [2023-11-29 02:34:47,285 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 80 SyntacticMatches, 1 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2099 ImplicationChecksByTransitivity, 6.2s TimeCoverageRelationStatistics Valid=1364, Invalid=10408, Unknown=0, NotChecked=0, Total=11772 [2023-11-29 02:34:47,286 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 205 mSDsluCounter, 321 mSDsCounter, 0 mSdLazyCounter, 1615 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 333 SdHoareTripleChecker+Invalid, 1637 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 1615 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:34:47,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 333 Invalid, 1637 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 1615 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:34:47,286 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2023-11-29 02:34:47,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 64. [2023-11-29 02:34:47,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.0476190476190477) internal successors, (66), 63 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 02:34:47,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 66 transitions. [2023-11-29 02:34:47,288 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 66 transitions. Word has length 59 [2023-11-29 02:34:47,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:34:47,289 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 66 transitions. [2023-11-29 02:34:47,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 63 states have (on average 2.492063492063492) internal successors, (157), 64 states have internal predecessors, (157), 0 states have call successors, (0), 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 02:34:47,289 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 66 transitions. [2023-11-29 02:34:47,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 02:34:47,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:34:47,290 INFO L195 NwaCegarLoop]: trace histogram [10, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:34:47,295 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 02:34:47,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 02:34:47,490 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:34:47,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:34:47,491 INFO L85 PathProgramCache]: Analyzing trace with hash -1076767686, now seen corresponding path program 17 times [2023-11-29 02:34:47,491 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:34:47,491 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930793320] [2023-11-29 02:34:47,491 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:47,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:34:47,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:34:47,998 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 18 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:47,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:34:47,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930793320] [2023-11-29 02:34:47,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930793320] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:34:47,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124610400] [2023-11-29 02:34:47,998 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:34:47,998 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:47,998 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:34:47,999 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:34:48,000 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 02:34:49,084 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2023-11-29 02:34:49,084 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:34:49,087 INFO L262 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 02:34:49,089 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:34:49,167 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 18 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:49,167 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:34:49,864 INFO L134 CoverageAnalysis]: Checked inductivity of 243 backedges. 18 proven. 225 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:49,864 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2124610400] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:34:49,864 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:34:49,864 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [24, 24, 24] total 48 [2023-11-29 02:34:49,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562477590] [2023-11-29 02:34:49,864 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:34:49,865 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 48 states [2023-11-29 02:34:49,865 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:34:49,866 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 48 interpolants. [2023-11-29 02:34:49,866 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=2126, Unknown=0, NotChecked=0, Total=2256 [2023-11-29 02:34:49,867 INFO L87 Difference]: Start difference. First operand 64 states and 66 transitions. Second operand has 48 states, 48 states have (on average 2.6041666666666665) internal successors, (125), 48 states have internal predecessors, (125), 0 states have call successors, (0), 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 02:34:50,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:34:50,698 INFO L93 Difference]: Finished difference Result 105 states and 107 transitions. [2023-11-29 02:34:50,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 02:34:50,698 INFO L78 Accepts]: Start accepts. Automaton has has 48 states, 48 states have (on average 2.6041666666666665) internal successors, (125), 48 states have internal predecessors, (125), 0 states have call successors, (0), 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 63 [2023-11-29 02:34:50,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:34:50,698 INFO L225 Difference]: With dead ends: 105 [2023-11-29 02:34:50,699 INFO L226 Difference]: Without dead ends: 67 [2023-11-29 02:34:50,699 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 102 SyntacticMatches, 0 SemanticMatches, 65 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=258, Invalid=4164, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 02:34:50,699 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 75 mSDsluCounter, 843 mSDsCounter, 0 mSdLazyCounter, 992 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 874 SdHoareTripleChecker+Invalid, 1002 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 992 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:34:50,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 874 Invalid, 1002 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 992 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:34:50,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2023-11-29 02:34:50,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 66. [2023-11-29 02:34:50,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0461538461538462) internal successors, (68), 65 states have internal predecessors, (68), 0 states have call successors, (0), 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 02:34:50,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 68 transitions. [2023-11-29 02:34:50,701 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 68 transitions. Word has length 63 [2023-11-29 02:34:50,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:34:50,702 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 68 transitions. [2023-11-29 02:34:50,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 48 states, 48 states have (on average 2.6041666666666665) internal successors, (125), 48 states have internal predecessors, (125), 0 states have call successors, (0), 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 02:34:50,702 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 68 transitions. [2023-11-29 02:34:50,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 02:34:50,702 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:34:50,702 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:34:50,708 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 02:34:50,903 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 02:34:50,903 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:34:50,903 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:34:50,903 INFO L85 PathProgramCache]: Analyzing trace with hash -184520152, now seen corresponding path program 18 times [2023-11-29 02:34:50,903 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:34:50,903 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101634463] [2023-11-29 02:34:50,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:34:50,904 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:34:50,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:34:52,077 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 0 proven. 262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:52,077 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:34:52,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101634463] [2023-11-29 02:34:52,077 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2101634463] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:34:52,077 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237434257] [2023-11-29 02:34:52,078 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:34:52,078 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:34:52,078 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:34:52,078 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:34:52,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 02:34:52,507 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 11 check-sat command(s) [2023-11-29 02:34:52,507 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:34:52,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 378 conjuncts, 88 conjunts are in the unsatisfiable core [2023-11-29 02:34:52,513 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:34:52,522 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:34:54,269 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 86 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:54,269 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:34:57,704 INFO L134 CoverageAnalysis]: Checked inductivity of 262 backedges. 64 proven. 198 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:34:57,704 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1237434257] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:34:57,704 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:34:57,704 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 27, 27] total 81 [2023-11-29 02:34:57,704 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414752952] [2023-11-29 02:34:57,705 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:34:57,705 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-11-29 02:34:57,705 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:34:57,706 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-11-29 02:34:57,706 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=447, Invalid=6195, Unknown=0, NotChecked=0, Total=6642 [2023-11-29 02:34:57,707 INFO L87 Difference]: Start difference. First operand 66 states and 68 transitions. Second operand has 82 states, 81 states have (on average 2.3333333333333335) internal successors, (189), 82 states have internal predecessors, (189), 0 states have call successors, (0), 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 02:35:03,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:03,192 INFO L93 Difference]: Finished difference Result 120 states and 123 transitions. [2023-11-29 02:35:03,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-29 02:35:03,193 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 81 states have (on average 2.3333333333333335) internal successors, (189), 82 states have internal predecessors, (189), 0 states have call successors, (0), 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 65 [2023-11-29 02:35:03,193 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:03,193 INFO L225 Difference]: With dead ends: 120 [2023-11-29 02:35:03,193 INFO L226 Difference]: Without dead ends: 120 [2023-11-29 02:35:03,194 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 232 GetRequests, 77 SyntacticMatches, 0 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5545 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=2209, Invalid=22283, Unknown=0, NotChecked=0, Total=24492 [2023-11-29 02:35:03,195 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 236 mSDsluCounter, 465 mSDsCounter, 0 mSdLazyCounter, 2348 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 236 SdHoareTripleChecker+Valid, 478 SdHoareTripleChecker+Invalid, 2364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2348 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:03,195 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [236 Valid, 478 Invalid, 2364 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2348 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 02:35:03,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2023-11-29 02:35:03,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 70. [2023-11-29 02:35:03,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.0434782608695652) internal successors, (72), 69 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 02:35:03,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 72 transitions. [2023-11-29 02:35:03,197 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 72 transitions. Word has length 65 [2023-11-29 02:35:03,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:03,197 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 72 transitions. [2023-11-29 02:35:03,197 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 81 states have (on average 2.3333333333333335) internal successors, (189), 82 states have internal predecessors, (189), 0 states have call successors, (0), 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 02:35:03,197 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 72 transitions. [2023-11-29 02:35:03,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 70 [2023-11-29 02:35:03,198 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:03,198 INFO L195 NwaCegarLoop]: trace histogram [11, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:35:03,203 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 02:35:03,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:03,399 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:35:03,399 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:03,399 INFO L85 PathProgramCache]: Analyzing trace with hash -1112566630, now seen corresponding path program 19 times [2023-11-29 02:35:03,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:03,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1457944257] [2023-11-29 02:35:03,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:03,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:03,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:03,904 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 20 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:03,904 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:03,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1457944257] [2023-11-29 02:35:03,905 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1457944257] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:35:03,905 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [406603345] [2023-11-29 02:35:03,905 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:35:03,905 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:03,905 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:03,906 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:03,907 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 02:35:04,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:04,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 398 conjuncts, 48 conjunts are in the unsatisfiable core [2023-11-29 02:35:04,046 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:04,161 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 20 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:04,162 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:35:04,978 INFO L134 CoverageAnalysis]: Checked inductivity of 300 backedges. 20 proven. 280 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:04,978 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [406603345] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:35:04,978 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:35:04,978 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [26, 26, 26] total 52 [2023-11-29 02:35:04,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515518193] [2023-11-29 02:35:04,978 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:35:04,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-29 02:35:04,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:04,980 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-29 02:35:04,980 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=2512, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 02:35:04,980 INFO L87 Difference]: Start difference. First operand 70 states and 72 transitions. Second operand has 52 states, 52 states have (on average 2.6346153846153846) internal successors, (137), 52 states have internal predecessors, (137), 0 states have call successors, (0), 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 02:35:06,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:06,005 INFO L93 Difference]: Finished difference Result 115 states and 117 transitions. [2023-11-29 02:35:06,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 02:35:06,006 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.6346153846153846) internal successors, (137), 52 states have internal predecessors, (137), 0 states have call successors, (0), 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 69 [2023-11-29 02:35:06,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:06,006 INFO L225 Difference]: With dead ends: 115 [2023-11-29 02:35:06,006 INFO L226 Difference]: Without dead ends: 73 [2023-11-29 02:35:06,007 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 183 GetRequests, 112 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 625 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=281, Invalid=4975, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 02:35:06,007 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 125 mSDsluCounter, 1244 mSDsCounter, 0 mSdLazyCounter, 1412 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 1278 SdHoareTripleChecker+Invalid, 1423 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1412 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:06,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 1278 Invalid, 1423 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1412 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 02:35:06,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-29 02:35:06,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2023-11-29 02:35:06,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.0422535211267605) internal successors, (74), 71 states have internal predecessors, (74), 0 states have call successors, (0), 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 02:35:06,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 74 transitions. [2023-11-29 02:35:06,009 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 74 transitions. Word has length 69 [2023-11-29 02:35:06,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:06,010 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 74 transitions. [2023-11-29 02:35:06,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.6346153846153846) internal successors, (137), 52 states have internal predecessors, (137), 0 states have call successors, (0), 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 02:35:06,010 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 74 transitions. [2023-11-29 02:35:06,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-29 02:35:06,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:06,010 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:35:06,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 02:35:06,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:06,211 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:35:06,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:06,211 INFO L85 PathProgramCache]: Analyzing trace with hash 952076296, now seen corresponding path program 20 times [2023-11-29 02:35:06,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:06,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417140130] [2023-11-29 02:35:06,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:06,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:06,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:07,771 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:07,771 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:07,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417140130] [2023-11-29 02:35:07,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417140130] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:35:07,771 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1256999014] [2023-11-29 02:35:07,771 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:35:07,771 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:07,772 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:07,772 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:07,773 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 02:35:07,902 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:35:07,902 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:35:07,905 INFO L262 TraceCheckSpWp]: Trace formula consists of 411 conjuncts, 95 conjunts are in the unsatisfiable core [2023-11-29 02:35:07,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:07,915 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 02:35:09,216 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 0 proven. 321 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:09,216 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:35:12,238 INFO L134 CoverageAnalysis]: Checked inductivity of 321 backedges. 121 proven. 200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:12,238 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1256999014] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:35:12,238 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:35:12,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 27, 27] total 72 [2023-11-29 02:35:12,239 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [303866374] [2023-11-29 02:35:12,239 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:35:12,239 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-11-29 02:35:12,239 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:12,240 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-11-29 02:35:12,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=379, Invalid=4877, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 02:35:12,240 INFO L87 Difference]: Start difference. First operand 72 states and 74 transitions. Second operand has 73 states, 72 states have (on average 2.5833333333333335) internal successors, (186), 73 states have internal predecessors, (186), 0 states have call successors, (0), 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 02:35:16,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:16,762 INFO L93 Difference]: Finished difference Result 130 states and 133 transitions. [2023-11-29 02:35:16,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-29 02:35:16,762 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 2.5833333333333335) internal successors, (186), 73 states have internal predecessors, (186), 0 states have call successors, (0), 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 71 [2023-11-29 02:35:16,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:16,763 INFO L225 Difference]: With dead ends: 130 [2023-11-29 02:35:16,763 INFO L226 Difference]: Without dead ends: 130 [2023-11-29 02:35:16,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 224 GetRequests, 99 SyntacticMatches, 1 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2823 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=1678, Invalid=14072, Unknown=0, NotChecked=0, Total=15750 [2023-11-29 02:35:16,765 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 350 mSDsluCounter, 499 mSDsCounter, 0 mSdLazyCounter, 2638 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 350 SdHoareTripleChecker+Valid, 513 SdHoareTripleChecker+Invalid, 2645 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 2638 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:16,765 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [350 Valid, 513 Invalid, 2645 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 2638 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 02:35:16,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-29 02:35:16,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2023-11-29 02:35:16,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 1.04) internal successors, (78), 75 states have internal predecessors, (78), 0 states have call successors, (0), 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 02:35:16,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 78 transitions. [2023-11-29 02:35:16,768 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 78 transitions. Word has length 71 [2023-11-29 02:35:16,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:16,768 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 78 transitions. [2023-11-29 02:35:16,768 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 2.5833333333333335) internal successors, (186), 73 states have internal predecessors, (186), 0 states have call successors, (0), 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 02:35:16,769 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 78 transitions. [2023-11-29 02:35:16,769 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-29 02:35:16,769 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:16,769 INFO L195 NwaCegarLoop]: trace histogram [12, 11, 11, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:35:16,774 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 02:35:16,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:16,970 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:35:16,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:16,970 INFO L85 PathProgramCache]: Analyzing trace with hash 1043380858, now seen corresponding path program 21 times [2023-11-29 02:35:16,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:16,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1064960303] [2023-11-29 02:35:16,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:16,970 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:17,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:17,555 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 22 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:17,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:17,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1064960303] [2023-11-29 02:35:17,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1064960303] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:35:17,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [825923212] [2023-11-29 02:35:17,556 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:35:17,556 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:17,556 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:17,557 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:17,558 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 02:35:18,998 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 12 check-sat command(s) [2023-11-29 02:35:18,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:35:19,002 INFO L262 TraceCheckSpWp]: Trace formula consists of 431 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-29 02:35:19,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:19,095 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 22 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:19,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:35:20,035 INFO L134 CoverageAnalysis]: Checked inductivity of 363 backedges. 22 proven. 341 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:20,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [825923212] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:35:20,035 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:35:20,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [28, 28, 28] total 56 [2023-11-29 02:35:20,035 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1746801184] [2023-11-29 02:35:20,036 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:35:20,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 56 states [2023-11-29 02:35:20,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:20,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 56 interpolants. [2023-11-29 02:35:20,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=150, Invalid=2930, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 02:35:20,037 INFO L87 Difference]: Start difference. First operand 76 states and 78 transitions. Second operand has 56 states, 56 states have (on average 2.6607142857142856) internal successors, (149), 56 states have internal predecessors, (149), 0 states have call successors, (0), 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 02:35:21,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:21,277 INFO L93 Difference]: Finished difference Result 125 states and 127 transitions. [2023-11-29 02:35:21,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2023-11-29 02:35:21,277 INFO L78 Accepts]: Start accepts. Automaton has has 56 states, 56 states have (on average 2.6607142857142856) internal successors, (149), 56 states have internal predecessors, (149), 0 states have call successors, (0), 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 75 [2023-11-29 02:35:21,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:21,278 INFO L225 Difference]: With dead ends: 125 [2023-11-29 02:35:21,278 INFO L226 Difference]: Without dead ends: 79 [2023-11-29 02:35:21,278 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 199 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 77 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=304, Invalid=5858, Unknown=0, NotChecked=0, Total=6162 [2023-11-29 02:35:21,279 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 92 mSDsluCounter, 1438 mSDsCounter, 0 mSdLazyCounter, 1641 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 92 SdHoareTripleChecker+Valid, 1475 SdHoareTripleChecker+Invalid, 1652 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 1641 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:21,279 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [92 Valid, 1475 Invalid, 1652 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 1641 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 02:35:21,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2023-11-29 02:35:21,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 78. [2023-11-29 02:35:21,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.0389610389610389) internal successors, (80), 77 states have internal predecessors, (80), 0 states have call successors, (0), 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 02:35:21,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 80 transitions. [2023-11-29 02:35:21,281 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 80 transitions. Word has length 75 [2023-11-29 02:35:21,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:21,281 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 80 transitions. [2023-11-29 02:35:21,281 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 56 states, 56 states have (on average 2.6607142857142856) internal successors, (149), 56 states have internal predecessors, (149), 0 states have call successors, (0), 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 02:35:21,281 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 80 transitions. [2023-11-29 02:35:21,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-29 02:35:21,282 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:21,282 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 11, 11, 11, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:35:21,288 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 02:35:21,482 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:21,483 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:35:21,483 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:21,483 INFO L85 PathProgramCache]: Analyzing trace with hash 925623144, now seen corresponding path program 22 times [2023-11-29 02:35:21,483 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:21,483 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731728695] [2023-11-29 02:35:21,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:21,483 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:21,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:23,158 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:23,158 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:23,158 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731728695] [2023-11-29 02:35:23,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [731728695] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:35:23,159 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526914372] [2023-11-29 02:35:23,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:35:23,159 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:23,159 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:23,159 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:23,160 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 02:35:23,409 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:35:23,409 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:35:23,413 INFO L262 TraceCheckSpWp]: Trace formula consists of 444 conjuncts, 100 conjunts are in the unsatisfiable core [2023-11-29 02:35:23,415 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:23,420 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 02:35:25,498 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 0 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:25,498 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:35:28,918 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 144 proven. 242 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:28,918 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526914372] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:35:28,918 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:35:28,919 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 29, 29] total 78 [2023-11-29 02:35:28,919 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025942924] [2023-11-29 02:35:28,919 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:35:28,919 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-11-29 02:35:28,919 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:28,920 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-11-29 02:35:28,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=500, Invalid=5662, Unknown=0, NotChecked=0, Total=6162 [2023-11-29 02:35:28,920 INFO L87 Difference]: Start difference. First operand 78 states and 80 transitions. Second operand has 79 states, 78 states have (on average 2.628205128205128) internal successors, (205), 79 states have internal predecessors, (205), 0 states have call successors, (0), 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 02:35:34,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:34,409 INFO L93 Difference]: Finished difference Result 140 states and 143 transitions. [2023-11-29 02:35:34,409 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 73 states. [2023-11-29 02:35:34,410 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 78 states have (on average 2.628205128205128) internal successors, (205), 79 states have internal predecessors, (205), 0 states have call successors, (0), 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 77 [2023-11-29 02:35:34,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:34,411 INFO L225 Difference]: With dead ends: 140 [2023-11-29 02:35:34,411 INFO L226 Difference]: Without dead ends: 140 [2023-11-29 02:35:34,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 242 GetRequests, 107 SyntacticMatches, 1 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3359 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=2060, Invalid=16300, Unknown=0, NotChecked=0, Total=18360 [2023-11-29 02:35:34,412 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 580 mSDsluCounter, 487 mSDsCounter, 0 mSdLazyCounter, 2472 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 580 SdHoareTripleChecker+Valid, 502 SdHoareTripleChecker+Invalid, 2503 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 2472 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:34,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [580 Valid, 502 Invalid, 2503 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 2472 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 02:35:34,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2023-11-29 02:35:34,414 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 82. [2023-11-29 02:35:34,414 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 1.037037037037037) internal successors, (84), 81 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 02:35:34,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 84 transitions. [2023-11-29 02:35:34,414 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 84 transitions. Word has length 77 [2023-11-29 02:35:34,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:34,415 INFO L495 AbstractCegarLoop]: Abstraction has 82 states and 84 transitions. [2023-11-29 02:35:34,415 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 78 states have (on average 2.628205128205128) internal successors, (205), 79 states have internal predecessors, (205), 0 states have call successors, (0), 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 02:35:34,415 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 84 transitions. [2023-11-29 02:35:34,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 82 [2023-11-29 02:35:34,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:34,415 INFO L195 NwaCegarLoop]: trace histogram [13, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:35:34,420 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 02:35:34,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:34,616 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:35:34,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:34,616 INFO L85 PathProgramCache]: Analyzing trace with hash 775972314, now seen corresponding path program 23 times [2023-11-29 02:35:34,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:34,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [616805455] [2023-11-29 02:35:34,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:34,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:34,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:35,257 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 24 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:35,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:35,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [616805455] [2023-11-29 02:35:35,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [616805455] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:35:35,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [52418003] [2023-11-29 02:35:35,258 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:35:35,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:35,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:35,259 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:35,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 02:35:36,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 13 check-sat command(s) [2023-11-29 02:35:36,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:35:36,540 INFO L262 TraceCheckSpWp]: Trace formula consists of 464 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-29 02:35:36,542 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:36,653 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 24 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:36,654 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:35:37,763 INFO L134 CoverageAnalysis]: Checked inductivity of 432 backedges. 24 proven. 408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:37,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [52418003] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:35:37,764 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:35:37,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [30, 30, 30] total 60 [2023-11-29 02:35:37,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386893413] [2023-11-29 02:35:37,764 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:35:37,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-29 02:35:37,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:37,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-29 02:35:37,765 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3380, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 02:35:37,766 INFO L87 Difference]: Start difference. First operand 82 states and 84 transitions. Second operand has 60 states, 60 states have (on average 2.683333333333333) internal successors, (161), 60 states have internal predecessors, (161), 0 states have call successors, (0), 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 02:35:39,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:39,042 INFO L93 Difference]: Finished difference Result 135 states and 137 transitions. [2023-11-29 02:35:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2023-11-29 02:35:39,042 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 60 states have (on average 2.683333333333333) internal successors, (161), 60 states have internal predecessors, (161), 0 states have call successors, (0), 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 81 [2023-11-29 02:35:39,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:39,043 INFO L225 Difference]: With dead ends: 135 [2023-11-29 02:35:39,043 INFO L226 Difference]: Without dead ends: 85 [2023-11-29 02:35:39,044 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 215 GetRequests, 132 SyntacticMatches, 0 SemanticMatches, 83 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 841 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=327, Invalid=6813, Unknown=0, NotChecked=0, Total=7140 [2023-11-29 02:35:39,044 INFO L413 NwaCegarLoop]: 40 mSDtfsCounter, 197 mSDsluCounter, 1363 mSDsCounter, 0 mSdLazyCounter, 1512 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 197 SdHoareTripleChecker+Valid, 1403 SdHoareTripleChecker+Invalid, 1526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1512 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:39,044 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [197 Valid, 1403 Invalid, 1526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1512 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:35:39,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2023-11-29 02:35:39,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 84. [2023-11-29 02:35:39,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.036144578313253) internal successors, (86), 83 states have internal predecessors, (86), 0 states have call successors, (0), 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 02:35:39,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 86 transitions. [2023-11-29 02:35:39,047 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 86 transitions. Word has length 81 [2023-11-29 02:35:39,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:39,047 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 86 transitions. [2023-11-29 02:35:39,047 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 60 states have (on average 2.683333333333333) internal successors, (161), 60 states have internal predecessors, (161), 0 states have call successors, (0), 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 02:35:39,047 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 86 transitions. [2023-11-29 02:35:39,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-29 02:35:39,048 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:39,048 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:35:39,055 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-29 02:35:39,248 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:39,249 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:35:39,249 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:39,249 INFO L85 PathProgramCache]: Analyzing trace with hash 1716036680, now seen corresponding path program 24 times [2023-11-29 02:35:39,249 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:39,249 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020038108] [2023-11-29 02:35:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:39,249 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:39,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:40,722 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 0 proven. 457 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:40,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:40,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020038108] [2023-11-29 02:35:40,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2020038108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:35:40,723 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762660915] [2023-11-29 02:35:40,723 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:35:40,723 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:40,723 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:40,724 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:40,724 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 02:35:41,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 14 check-sat command(s) [2023-11-29 02:35:41,910 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:35:41,914 INFO L262 TraceCheckSpWp]: Trace formula consists of 477 conjuncts, 57 conjunts are in the unsatisfiable core [2023-11-29 02:35:41,916 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:43,482 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 144 proven. 313 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:43,483 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:35:43,595 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:35:43,595 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 02:35:46,551 INFO L134 CoverageAnalysis]: Checked inductivity of 457 backedges. 169 proven. 288 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:46,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [762660915] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:35:46,551 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:35:46,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 32, 32] total 88 [2023-11-29 02:35:46,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490995424] [2023-11-29 02:35:46,551 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:35:46,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-11-29 02:35:46,552 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:46,552 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-11-29 02:35:46,553 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=590, Invalid=7242, Unknown=0, NotChecked=0, Total=7832 [2023-11-29 02:35:46,553 INFO L87 Difference]: Start difference. First operand 84 states and 86 transitions. Second operand has 89 states, 88 states have (on average 2.352272727272727) internal successors, (207), 89 states have internal predecessors, (207), 0 states have call successors, (0), 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 02:35:51,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:51,397 INFO L93 Difference]: Finished difference Result 150 states and 153 transitions. [2023-11-29 02:35:51,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-29 02:35:51,397 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 2.352272727272727) internal successors, (207), 89 states have internal predecessors, (207), 0 states have call successors, (0), 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 83 [2023-11-29 02:35:51,397 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:51,398 INFO L225 Difference]: With dead ends: 150 [2023-11-29 02:35:51,398 INFO L226 Difference]: Without dead ends: 150 [2023-11-29 02:35:51,399 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 274 GetRequests, 101 SyntacticMatches, 11 SemanticMatches, 162 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5334 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=2836, Invalid=23896, Unknown=0, NotChecked=0, Total=26732 [2023-11-29 02:35:51,400 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 278 mSDsluCounter, 661 mSDsCounter, 0 mSdLazyCounter, 3320 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 676 SdHoareTripleChecker+Invalid, 3348 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 3320 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:51,400 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 676 Invalid, 3348 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 3320 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 02:35:51,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2023-11-29 02:35:51,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 88. [2023-11-29 02:35:51,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.0344827586206897) internal successors, (90), 87 states have internal predecessors, (90), 0 states have call successors, (0), 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 02:35:51,403 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 90 transitions. [2023-11-29 02:35:51,403 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 90 transitions. Word has length 83 [2023-11-29 02:35:51,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:51,403 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 90 transitions. [2023-11-29 02:35:51,403 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 2.352272727272727) internal successors, (207), 89 states have internal predecessors, (207), 0 states have call successors, (0), 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 02:35:51,403 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 90 transitions. [2023-11-29 02:35:51,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 88 [2023-11-29 02:35:51,403 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:51,403 INFO L195 NwaCegarLoop]: trace histogram [14, 13, 13, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:35:51,409 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 02:35:51,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:51,604 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:35:51,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:51,604 INFO L85 PathProgramCache]: Analyzing trace with hash 223459002, now seen corresponding path program 25 times [2023-11-29 02:35:51,604 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:51,604 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [738523710] [2023-11-29 02:35:51,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:51,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:51,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:52,257 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 26 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:52,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:52,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [738523710] [2023-11-29 02:35:52,258 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [738523710] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:35:52,258 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1476330599] [2023-11-29 02:35:52,258 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:35:52,258 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:52,258 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:52,259 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:52,259 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 02:35:52,404 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:52,407 INFO L262 TraceCheckSpWp]: Trace formula consists of 497 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 02:35:52,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:52,519 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 26 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:52,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:35:53,735 INFO L134 CoverageAnalysis]: Checked inductivity of 507 backedges. 26 proven. 481 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:53,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1476330599] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:35:53,735 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:35:53,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [32, 32, 32] total 64 [2023-11-29 02:35:53,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [596804949] [2023-11-29 02:35:53,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:35:53,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-29 02:35:53,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:35:53,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-29 02:35:53,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=170, Invalid=3862, Unknown=0, NotChecked=0, Total=4032 [2023-11-29 02:35:53,736 INFO L87 Difference]: Start difference. First operand 88 states and 90 transitions. Second operand has 64 states, 64 states have (on average 2.703125) internal successors, (173), 64 states have internal predecessors, (173), 0 states have call successors, (0), 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 02:35:55,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:35:55,285 INFO L93 Difference]: Finished difference Result 145 states and 147 transitions. [2023-11-29 02:35:55,285 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 02:35:55,285 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.703125) internal successors, (173), 64 states have internal predecessors, (173), 0 states have call successors, (0), 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 87 [2023-11-29 02:35:55,285 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:35:55,285 INFO L225 Difference]: With dead ends: 145 [2023-11-29 02:35:55,285 INFO L226 Difference]: Without dead ends: 91 [2023-11-29 02:35:55,286 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 142 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 961 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=350, Invalid=7840, Unknown=0, NotChecked=0, Total=8190 [2023-11-29 02:35:55,286 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 56 mSDsluCounter, 1634 mSDsCounter, 0 mSdLazyCounter, 1858 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 1677 SdHoareTripleChecker+Invalid, 1871 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 1858 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:35:55,286 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 1677 Invalid, 1871 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 1858 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:35:55,287 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-29 02:35:55,288 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 90. [2023-11-29 02:35:55,288 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0337078651685394) internal successors, (92), 89 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:35:55,288 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 92 transitions. [2023-11-29 02:35:55,288 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 92 transitions. Word has length 87 [2023-11-29 02:35:55,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:35:55,288 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 92 transitions. [2023-11-29 02:35:55,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.703125) internal successors, (173), 64 states have internal predecessors, (173), 0 states have call successors, (0), 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 02:35:55,289 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 92 transitions. [2023-11-29 02:35:55,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 02:35:55,289 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:35:55,289 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 13, 13, 13, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:35:55,294 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 02:35:55,490 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36,29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:55,490 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:35:55,490 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:35:55,490 INFO L85 PathProgramCache]: Analyzing trace with hash -1667175768, now seen corresponding path program 26 times [2023-11-29 02:35:55,490 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:35:55,490 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [434602066] [2023-11-29 02:35:55,490 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:35:55,491 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:35:55,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:35:57,251 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:57,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:35:57,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [434602066] [2023-11-29 02:35:57,252 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [434602066] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:35:57,252 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [12404642] [2023-11-29 02:35:57,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:35:57,252 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:35:57,252 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:35:57,253 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:35:57,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 02:35:57,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:35:57,417 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:35:57,422 INFO L262 TraceCheckSpWp]: Trace formula consists of 510 conjuncts, 117 conjunts are in the unsatisfiable core [2023-11-29 02:35:57,425 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:35:57,428 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 02:35:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 0 proven. 534 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:35:59,280 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:36:03,451 INFO L134 CoverageAnalysis]: Checked inductivity of 534 backedges. 196 proven. 338 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:36:03,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [12404642] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:36:03,451 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:36:03,451 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 33, 33] total 87 [2023-11-29 02:36:03,451 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [119380528] [2023-11-29 02:36:03,451 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:36:03,452 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-11-29 02:36:03,452 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:36:03,453 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-11-29 02:36:03,453 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=534, Invalid=7122, Unknown=0, NotChecked=0, Total=7656 [2023-11-29 02:36:03,454 INFO L87 Difference]: Start difference. First operand 90 states and 92 transitions. Second operand has 88 states, 87 states have (on average 2.689655172413793) internal successors, (234), 88 states have internal predecessors, (234), 0 states have call successors, (0), 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 02:36:09,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:36:09,708 INFO L93 Difference]: Finished difference Result 160 states and 163 transitions. [2023-11-29 02:36:09,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 85 states. [2023-11-29 02:36:09,709 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 87 states have (on average 2.689655172413793) internal successors, (234), 88 states have internal predecessors, (234), 0 states have call successors, (0), 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 89 [2023-11-29 02:36:09,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:36:09,709 INFO L225 Difference]: With dead ends: 160 [2023-11-29 02:36:09,709 INFO L226 Difference]: Without dead ends: 160 [2023-11-29 02:36:09,710 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 280 GetRequests, 126 SyntacticMatches, 1 SemanticMatches, 153 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4408 ImplicationChecksByTransitivity, 9.6s TimeCoverageRelationStatistics Valid=2461, Invalid=21409, Unknown=0, NotChecked=0, Total=23870 [2023-11-29 02:36:09,711 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 485 mSDsluCounter, 715 mSDsCounter, 0 mSdLazyCounter, 3650 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 485 SdHoareTripleChecker+Valid, 732 SdHoareTripleChecker+Invalid, 3660 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 3650 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:36:09,711 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [485 Valid, 732 Invalid, 3660 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 3650 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 02:36:09,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2023-11-29 02:36:09,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 94. [2023-11-29 02:36:09,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.032258064516129) internal successors, (96), 93 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 02:36:09,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 96 transitions. [2023-11-29 02:36:09,714 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 96 transitions. Word has length 89 [2023-11-29 02:36:09,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:36:09,714 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 96 transitions. [2023-11-29 02:36:09,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 87 states have (on average 2.689655172413793) internal successors, (234), 88 states have internal predecessors, (234), 0 states have call successors, (0), 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 02:36:09,715 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 96 transitions. [2023-11-29 02:36:09,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 94 [2023-11-29 02:36:09,715 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:36:09,715 INFO L195 NwaCegarLoop]: trace histogram [15, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:36:09,721 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 02:36:09,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 02:36:09,916 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:36:09,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:36:09,916 INFO L85 PathProgramCache]: Analyzing trace with hash 929025306, now seen corresponding path program 27 times [2023-11-29 02:36:09,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:36:09,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299169184] [2023-11-29 02:36:09,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:09,917 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:36:09,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:36:10,674 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 28 proven. 560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:36:10,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:36:10,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299169184] [2023-11-29 02:36:10,675 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1299169184] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:36:10,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682581190] [2023-11-29 02:36:10,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:36:10,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:36:10,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:36:10,676 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:36:10,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 02:36:13,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-11-29 02:36:13,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:36:13,481 INFO L262 TraceCheckSpWp]: Trace formula consists of 530 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-29 02:36:13,483 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:36:13,605 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 28 proven. 560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:36:13,605 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:36:14,970 INFO L134 CoverageAnalysis]: Checked inductivity of 588 backedges. 28 proven. 560 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:36:14,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [682581190] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:36:14,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:36:14,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [34, 34, 34] total 68 [2023-11-29 02:36:14,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [693841019] [2023-11-29 02:36:14,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:36:14,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 68 states [2023-11-29 02:36:14,971 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:36:14,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 68 interpolants. [2023-11-29 02:36:14,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=180, Invalid=4376, Unknown=0, NotChecked=0, Total=4556 [2023-11-29 02:36:14,973 INFO L87 Difference]: Start difference. First operand 94 states and 96 transitions. Second operand has 68 states, 68 states have (on average 2.7205882352941178) internal successors, (185), 68 states have internal predecessors, (185), 0 states have call successors, (0), 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 02:36:16,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:36:16,735 INFO L93 Difference]: Finished difference Result 155 states and 157 transitions. [2023-11-29 02:36:16,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 48 states. [2023-11-29 02:36:16,735 INFO L78 Accepts]: Start accepts. Automaton has has 68 states, 68 states have (on average 2.7205882352941178) internal successors, (185), 68 states have internal predecessors, (185), 0 states have call successors, (0), 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 93 [2023-11-29 02:36:16,735 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:36:16,736 INFO L225 Difference]: With dead ends: 155 [2023-11-29 02:36:16,736 INFO L226 Difference]: Without dead ends: 97 [2023-11-29 02:36:16,737 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 247 GetRequests, 152 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1089 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=373, Invalid=8939, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 02:36:16,737 INFO L413 NwaCegarLoop]: 46 mSDtfsCounter, 228 mSDsluCounter, 2289 mSDsCounter, 0 mSdLazyCounter, 2496 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 228 SdHoareTripleChecker+Valid, 2335 SdHoareTripleChecker+Invalid, 2512 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 2496 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:36:16,737 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [228 Valid, 2335 Invalid, 2512 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 2496 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 02:36:16,738 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2023-11-29 02:36:16,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 96. [2023-11-29 02:36:16,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0315789473684212) internal successors, (98), 95 states have internal predecessors, (98), 0 states have call successors, (0), 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 02:36:16,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 98 transitions. [2023-11-29 02:36:16,740 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 98 transitions. Word has length 93 [2023-11-29 02:36:16,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:36:16,740 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 98 transitions. [2023-11-29 02:36:16,740 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 68 states, 68 states have (on average 2.7205882352941178) internal successors, (185), 68 states have internal predecessors, (185), 0 states have call successors, (0), 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 02:36:16,741 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 98 transitions. [2023-11-29 02:36:16,741 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-29 02:36:16,741 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:36:16,741 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:36:16,747 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 02:36:16,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 02:36:16,942 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:36:16,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:36:16,942 INFO L85 PathProgramCache]: Analyzing trace with hash -616049016, now seen corresponding path program 28 times [2023-11-29 02:36:16,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:36:16,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128448845] [2023-11-29 02:36:16,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:16,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:36:16,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:36:18,639 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 0 proven. 617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:36:18,639 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:36:18,639 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128448845] [2023-11-29 02:36:18,639 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128448845] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:36:18,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [112791611] [2023-11-29 02:36:18,640 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:36:18,640 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:36:18,640 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:36:18,641 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:36:18,641 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 02:36:19,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:36:19,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:36:19,139 INFO L262 TraceCheckSpWp]: Trace formula consists of 543 conjuncts, 119 conjunts are in the unsatisfiable core [2023-11-29 02:36:19,142 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:36:19,147 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 02:36:21,446 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 0 proven. 617 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:36:21,447 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:36:26,330 INFO L134 CoverageAnalysis]: Checked inductivity of 617 backedges. 225 proven. 392 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:36:26,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [112791611] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:36:26,330 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:36:26,331 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 35, 35] total 107 [2023-11-29 02:36:26,331 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790889510] [2023-11-29 02:36:26,331 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:36:26,331 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 108 states [2023-11-29 02:36:26,331 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:36:26,332 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 108 interpolants. [2023-11-29 02:36:26,333 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=617, Invalid=10939, Unknown=0, NotChecked=0, Total=11556 [2023-11-29 02:36:26,333 INFO L87 Difference]: Start difference. First operand 96 states and 98 transitions. Second operand has 108 states, 107 states have (on average 2.607476635514019) internal successors, (279), 108 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:36:32,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:36:32,259 INFO L93 Difference]: Finished difference Result 170 states and 173 transitions. [2023-11-29 02:36:32,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-11-29 02:36:32,260 INFO L78 Accepts]: Start accepts. Automaton has has 108 states, 107 states have (on average 2.607476635514019) internal successors, (279), 108 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2023-11-29 02:36:32,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:36:32,261 INFO L225 Difference]: With dead ends: 170 [2023-11-29 02:36:32,261 INFO L226 Difference]: Without dead ends: 170 [2023-11-29 02:36:32,262 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 297 GetRequests, 121 SyntacticMatches, 0 SemanticMatches, 176 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6825 ImplicationChecksByTransitivity, 9.8s TimeCoverageRelationStatistics Valid=2767, Invalid=28739, Unknown=0, NotChecked=0, Total=31506 [2023-11-29 02:36:32,263 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 643 mSDsluCounter, 1022 mSDsCounter, 0 mSdLazyCounter, 5209 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 643 SdHoareTripleChecker+Valid, 1040 SdHoareTripleChecker+Invalid, 5217 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 5209 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:36:32,263 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [643 Valid, 1040 Invalid, 5217 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 5209 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 02:36:32,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2023-11-29 02:36:32,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 100. [2023-11-29 02:36:32,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 1.0303030303030303) internal successors, (102), 99 states have internal predecessors, (102), 0 states have call successors, (0), 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 02:36:32,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 102 transitions. [2023-11-29 02:36:32,265 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 102 transitions. Word has length 95 [2023-11-29 02:36:32,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:36:32,265 INFO L495 AbstractCegarLoop]: Abstraction has 100 states and 102 transitions. [2023-11-29 02:36:32,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 108 states, 107 states have (on average 2.607476635514019) internal successors, (279), 108 states have internal predecessors, (279), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:36:32,265 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 102 transitions. [2023-11-29 02:36:32,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 100 [2023-11-29 02:36:32,265 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:36:32,266 INFO L195 NwaCegarLoop]: trace histogram [16, 15, 15, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:36:32,271 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 02:36:32,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 02:36:32,466 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:36:32,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:36:32,466 INFO L85 PathProgramCache]: Analyzing trace with hash -1360148230, now seen corresponding path program 29 times [2023-11-29 02:36:32,466 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:36:32,466 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1296971919] [2023-11-29 02:36:32,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:32,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:36:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:36:33,394 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 30 proven. 645 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:36:33,395 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:36:33,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1296971919] [2023-11-29 02:36:33,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1296971919] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:36:33,395 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453318013] [2023-11-29 02:36:33,395 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:36:33,395 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:36:33,395 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:36:33,396 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:36:33,397 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 02:36:37,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-11-29 02:36:37,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:36:37,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 563 conjuncts, 68 conjunts are in the unsatisfiable core [2023-11-29 02:36:37,454 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:36:37,598 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 30 proven. 645 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:36:37,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:36:39,085 INFO L134 CoverageAnalysis]: Checked inductivity of 675 backedges. 30 proven. 645 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:36:39,085 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453318013] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:36:39,085 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:36:39,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [36, 36, 36] total 72 [2023-11-29 02:36:39,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054343828] [2023-11-29 02:36:39,086 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:36:39,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 72 states [2023-11-29 02:36:39,086 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:36:39,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 72 interpolants. [2023-11-29 02:36:39,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=190, Invalid=4922, Unknown=0, NotChecked=0, Total=5112 [2023-11-29 02:36:39,087 INFO L87 Difference]: Start difference. First operand 100 states and 102 transitions. Second operand has 72 states, 72 states have (on average 2.736111111111111) internal successors, (197), 72 states have internal predecessors, (197), 0 states have call successors, (0), 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 02:36:41,054 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:36:41,054 INFO L93 Difference]: Finished difference Result 165 states and 167 transitions. [2023-11-29 02:36:41,054 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 02:36:41,054 INFO L78 Accepts]: Start accepts. Automaton has has 72 states, 72 states have (on average 2.736111111111111) internal successors, (197), 72 states have internal predecessors, (197), 0 states have call successors, (0), 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 99 [2023-11-29 02:36:41,055 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:36:41,055 INFO L225 Difference]: With dead ends: 165 [2023-11-29 02:36:41,055 INFO L226 Difference]: Without dead ends: 103 [2023-11-29 02:36:41,056 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 263 GetRequests, 162 SyntacticMatches, 0 SemanticMatches, 101 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1225 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=396, Invalid=10110, Unknown=0, NotChecked=0, Total=10506 [2023-11-29 02:36:41,056 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 125 mSDsluCounter, 2248 mSDsCounter, 0 mSdLazyCounter, 2478 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 125 SdHoareTripleChecker+Valid, 2297 SdHoareTripleChecker+Invalid, 2493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 2478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:36:41,056 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [125 Valid, 2297 Invalid, 2493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 2478 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 02:36:41,056 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-29 02:36:41,058 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 102. [2023-11-29 02:36:41,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0297029702970297) internal successors, (104), 101 states have internal predecessors, (104), 0 states have call successors, (0), 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 02:36:41,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 104 transitions. [2023-11-29 02:36:41,058 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 104 transitions. Word has length 99 [2023-11-29 02:36:41,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:36:41,058 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 104 transitions. [2023-11-29 02:36:41,058 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 72 states, 72 states have (on average 2.736111111111111) internal successors, (197), 72 states have internal predecessors, (197), 0 states have call successors, (0), 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 02:36:41,059 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 104 transitions. [2023-11-29 02:36:41,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-29 02:36:41,067 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:36:41,067 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 15, 15, 15, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:36:41,075 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 02:36:41,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:36:41,268 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:36:41,268 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:36:41,268 INFO L85 PathProgramCache]: Analyzing trace with hash -1747417112, now seen corresponding path program 30 times [2023-11-29 02:36:41,268 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:36:41,268 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [394626084] [2023-11-29 02:36:41,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:36:41,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:36:41,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:36:43,302 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:36:43,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:36:43,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [394626084] [2023-11-29 02:36:43,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [394626084] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:36:43,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [984728826] [2023-11-29 02:36:43,302 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:36:43,302 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:36:43,302 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:36:43,303 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:36:43,304 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 02:36:44,460 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-11-29 02:36:44,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:36:44,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 576 conjuncts, 132 conjunts are in the unsatisfiable core [2023-11-29 02:36:44,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:36:44,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:36:48,415 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:36:48,416 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:36:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 706 backedges. 0 proven. 706 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:36:54,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [984728826] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:36:54,517 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:36:54,517 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 39, 38] total 117 [2023-11-29 02:36:54,517 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1813979176] [2023-11-29 02:36:54,517 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:36:54,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2023-11-29 02:36:54,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:36:54,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2023-11-29 02:36:54,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=743, Invalid=13063, Unknown=0, NotChecked=0, Total=13806 [2023-11-29 02:36:54,519 INFO L87 Difference]: Start difference. First operand 102 states and 104 transitions. Second operand has 118 states, 117 states have (on average 2.5641025641025643) internal successors, (300), 118 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:37:08,234 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:37:08,234 INFO L93 Difference]: Finished difference Result 179 states and 182 transitions. [2023-11-29 02:37:08,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 108 states. [2023-11-29 02:37:08,235 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 117 states have (on average 2.5641025641025643) internal successors, (300), 118 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 101 [2023-11-29 02:37:08,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:37:08,235 INFO L225 Difference]: With dead ends: 179 [2023-11-29 02:37:08,235 INFO L226 Difference]: Without dead ends: 179 [2023-11-29 02:37:08,237 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 346 GetRequests, 125 SyntacticMatches, 0 SemanticMatches, 221 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11866 ImplicationChecksByTransitivity, 19.1s TimeCoverageRelationStatistics Valid=4159, Invalid=45347, Unknown=0, NotChecked=0, Total=49506 [2023-11-29 02:37:08,237 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 1318 mSDsluCounter, 1107 mSDsCounter, 0 mSdLazyCounter, 5943 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1318 SdHoareTripleChecker+Valid, 1124 SdHoareTripleChecker+Invalid, 5984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 5943 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:37:08,238 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1318 Valid, 1124 Invalid, 5984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 5943 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-29 02:37:08,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-29 02:37:08,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 106. [2023-11-29 02:37:08,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 1.0285714285714285) internal successors, (108), 105 states have internal predecessors, (108), 0 states have call successors, (0), 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 02:37:08,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 108 transitions. [2023-11-29 02:37:08,241 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 108 transitions. Word has length 101 [2023-11-29 02:37:08,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:37:08,241 INFO L495 AbstractCegarLoop]: Abstraction has 106 states and 108 transitions. [2023-11-29 02:37:08,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 117 states have (on average 2.5641025641025643) internal successors, (300), 118 states have internal predecessors, (300), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:37:08,241 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 108 transitions. [2023-11-29 02:37:08,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-29 02:37:08,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:37:08,242 INFO L195 NwaCegarLoop]: trace histogram [17, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:08,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 02:37:08,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:08,442 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:37:08,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:08,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1728498266, now seen corresponding path program 31 times [2023-11-29 02:37:08,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:08,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555459512] [2023-11-29 02:37:08,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:08,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:08,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:09,432 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 32 proven. 736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:09,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:09,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555459512] [2023-11-29 02:37:09,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555459512] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:37:09,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1232163054] [2023-11-29 02:37:09,433 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:37:09,433 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:09,433 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:09,433 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:37:09,434 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 02:37:09,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:09,836 INFO L262 TraceCheckSpWp]: Trace formula consists of 596 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-29 02:37:09,838 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:10,005 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 32 proven. 736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:10,005 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:37:11,684 INFO L134 CoverageAnalysis]: Checked inductivity of 768 backedges. 32 proven. 736 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:11,685 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1232163054] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:37:11,685 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:37:11,685 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [38, 38, 38] total 76 [2023-11-29 02:37:11,685 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2083672689] [2023-11-29 02:37:11,685 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:37:11,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-11-29 02:37:11,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:11,686 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-11-29 02:37:11,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=200, Invalid=5500, Unknown=0, NotChecked=0, Total=5700 [2023-11-29 02:37:11,687 INFO L87 Difference]: Start difference. First operand 106 states and 108 transitions. Second operand has 76 states, 76 states have (on average 2.75) internal successors, (209), 76 states have internal predecessors, (209), 0 states have call successors, (0), 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 02:37:13,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:37:13,951 INFO L93 Difference]: Finished difference Result 175 states and 177 transitions. [2023-11-29 02:37:13,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-29 02:37:13,951 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.75) internal successors, (209), 76 states have internal predecessors, (209), 0 states have call successors, (0), 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 105 [2023-11-29 02:37:13,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:37:13,952 INFO L225 Difference]: With dead ends: 175 [2023-11-29 02:37:13,952 INFO L226 Difference]: Without dead ends: 109 [2023-11-29 02:37:13,953 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 279 GetRequests, 172 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1369 ImplicationChecksByTransitivity, 3.1s TimeCoverageRelationStatistics Valid=419, Invalid=11353, Unknown=0, NotChecked=0, Total=11772 [2023-11-29 02:37:13,953 INFO L413 NwaCegarLoop]: 52 mSDtfsCounter, 196 mSDsluCounter, 2806 mSDsCounter, 0 mSdLazyCounter, 3012 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 196 SdHoareTripleChecker+Valid, 2858 SdHoareTripleChecker+Invalid, 3029 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 3012 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:37:13,953 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [196 Valid, 2858 Invalid, 3029 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 3012 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 02:37:13,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-29 02:37:13,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 108. [2023-11-29 02:37:13,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.02803738317757) internal successors, (110), 107 states have internal predecessors, (110), 0 states have call successors, (0), 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 02:37:13,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 110 transitions. [2023-11-29 02:37:13,956 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 110 transitions. Word has length 105 [2023-11-29 02:37:13,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:37:13,956 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 110 transitions. [2023-11-29 02:37:13,957 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.75) internal successors, (209), 76 states have internal predecessors, (209), 0 states have call successors, (0), 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 02:37:13,957 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 110 transitions. [2023-11-29 02:37:13,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-29 02:37:13,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:37:13,957 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:13,964 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 02:37:14,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2023-11-29 02:37:14,158 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:37:14,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:14,158 INFO L85 PathProgramCache]: Analyzing trace with hash -2039079224, now seen corresponding path program 32 times [2023-11-29 02:37:14,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:14,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839370843] [2023-11-29 02:37:14,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:14,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:14,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:16,203 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:16,204 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:16,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839370843] [2023-11-29 02:37:16,204 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839370843] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:37:16,204 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581175690] [2023-11-29 02:37:16,204 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:37:16,204 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:16,204 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:16,205 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:37:16,206 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 02:37:16,364 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:37:16,364 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:37:16,369 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 131 conjunts are in the unsatisfiable core [2023-11-29 02:37:16,372 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:16,378 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 02:37:19,117 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 0 proven. 801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:19,117 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:37:24,832 INFO L134 CoverageAnalysis]: Checked inductivity of 801 backedges. 289 proven. 512 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:24,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581175690] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:37:24,832 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:37:24,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 39, 39] total 119 [2023-11-29 02:37:24,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40480238] [2023-11-29 02:37:24,833 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:37:24,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 120 states [2023-11-29 02:37:24,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:24,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 120 interpolants. [2023-11-29 02:37:24,835 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=744, Invalid=13536, Unknown=0, NotChecked=0, Total=14280 [2023-11-29 02:37:24,835 INFO L87 Difference]: Start difference. First operand 108 states and 110 transitions. Second operand has 120 states, 119 states have (on average 2.6470588235294117) internal successors, (315), 120 states have internal predecessors, (315), 0 states have call successors, (0), 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 02:37:31,644 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:37:31,644 INFO L93 Difference]: Finished difference Result 190 states and 193 transitions. [2023-11-29 02:37:31,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-11-29 02:37:31,645 INFO L78 Accepts]: Start accepts. Automaton has has 120 states, 119 states have (on average 2.6470588235294117) internal successors, (315), 120 states have internal predecessors, (315), 0 states have call successors, (0), 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 107 [2023-11-29 02:37:31,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:37:31,646 INFO L225 Difference]: With dead ends: 190 [2023-11-29 02:37:31,646 INFO L226 Difference]: Without dead ends: 190 [2023-11-29 02:37:31,648 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 333 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8522 ImplicationChecksByTransitivity, 11.7s TimeCoverageRelationStatistics Valid=3370, Invalid=35636, Unknown=0, NotChecked=0, Total=39006 [2023-11-29 02:37:31,648 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 869 mSDsluCounter, 1206 mSDsCounter, 0 mSdLazyCounter, 6171 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 869 SdHoareTripleChecker+Valid, 1226 SdHoareTripleChecker+Invalid, 6181 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 6171 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:37:31,648 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [869 Valid, 1226 Invalid, 6181 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 6171 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-29 02:37:31,648 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-11-29 02:37:31,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 112. [2023-11-29 02:37:31,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 112 states, 111 states have (on average 1.027027027027027) internal successors, (114), 111 states have internal predecessors, (114), 0 states have call successors, (0), 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 02:37:31,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 114 transitions. [2023-11-29 02:37:31,651 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 114 transitions. Word has length 107 [2023-11-29 02:37:31,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:37:31,651 INFO L495 AbstractCegarLoop]: Abstraction has 112 states and 114 transitions. [2023-11-29 02:37:31,651 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 120 states, 119 states have (on average 2.6470588235294117) internal successors, (315), 120 states have internal predecessors, (315), 0 states have call successors, (0), 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 02:37:31,652 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 114 transitions. [2023-11-29 02:37:31,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 112 [2023-11-29 02:37:31,652 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:37:31,652 INFO L195 NwaCegarLoop]: trace histogram [18, 17, 17, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:31,657 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 02:37:31,853 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-29 02:37:31,853 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:37:31,853 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:31,853 INFO L85 PathProgramCache]: Analyzing trace with hash 222163258, now seen corresponding path program 33 times [2023-11-29 02:37:31,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:31,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424282980] [2023-11-29 02:37:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:31,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:31,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:32,847 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 34 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:32,847 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:32,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424282980] [2023-11-29 02:37:32,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424282980] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:37:32,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679161686] [2023-11-29 02:37:32,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:37:32,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:32,848 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:32,848 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:37:32,849 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 02:37:38,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 18 check-sat command(s) [2023-11-29 02:37:38,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:37:38,880 INFO L262 TraceCheckSpWp]: Trace formula consists of 629 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-29 02:37:38,882 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:39,023 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 34 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:39,023 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:37:40,879 INFO L134 CoverageAnalysis]: Checked inductivity of 867 backedges. 34 proven. 833 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:40,880 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [679161686] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:37:40,880 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:37:40,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [40, 40, 40] total 80 [2023-11-29 02:37:40,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670244507] [2023-11-29 02:37:40,880 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:37:40,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-11-29 02:37:40,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:40,881 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-11-29 02:37:40,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=210, Invalid=6110, Unknown=0, NotChecked=0, Total=6320 [2023-11-29 02:37:40,882 INFO L87 Difference]: Start difference. First operand 112 states and 114 transitions. Second operand has 80 states, 80 states have (on average 2.7625) internal successors, (221), 80 states have internal predecessors, (221), 0 states have call successors, (0), 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 02:37:43,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:37:43,355 INFO L93 Difference]: Finished difference Result 185 states and 187 transitions. [2023-11-29 02:37:43,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-29 02:37:43,356 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 80 states have (on average 2.7625) internal successors, (221), 80 states have internal predecessors, (221), 0 states have call successors, (0), 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 111 [2023-11-29 02:37:43,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:37:43,357 INFO L225 Difference]: With dead ends: 185 [2023-11-29 02:37:43,357 INFO L226 Difference]: Without dead ends: 115 [2023-11-29 02:37:43,357 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 182 SyntacticMatches, 0 SemanticMatches, 113 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1521 ImplicationChecksByTransitivity, 3.4s TimeCoverageRelationStatistics Valid=442, Invalid=12668, Unknown=0, NotChecked=0, Total=13110 [2023-11-29 02:37:43,358 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 209 mSDsluCounter, 3020 mSDsCounter, 0 mSdLazyCounter, 3220 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 209 SdHoareTripleChecker+Valid, 3075 SdHoareTripleChecker+Invalid, 3238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3220 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:37:43,358 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [209 Valid, 3075 Invalid, 3238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3220 Invalid, 0 Unknown, 0 Unchecked, 1.2s Time] [2023-11-29 02:37:43,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-29 02:37:43,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 114. [2023-11-29 02:37:43,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0265486725663717) internal successors, (116), 113 states have internal predecessors, (116), 0 states have call successors, (0), 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 02:37:43,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 116 transitions. [2023-11-29 02:37:43,360 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 116 transitions. Word has length 111 [2023-11-29 02:37:43,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:37:43,360 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 116 transitions. [2023-11-29 02:37:43,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 80 states have (on average 2.7625) internal successors, (221), 80 states have internal predecessors, (221), 0 states have call successors, (0), 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 02:37:43,360 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 116 transitions. [2023-11-29 02:37:43,360 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-29 02:37:43,361 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:37:43,361 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 17, 17, 17, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:37:43,367 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 02:37:43,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-29 02:37:43,561 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:37:43,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:37:43,562 INFO L85 PathProgramCache]: Analyzing trace with hash -473187544, now seen corresponding path program 34 times [2023-11-29 02:37:43,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:37:43,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108991319] [2023-11-29 02:37:43,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:37:43,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:37:43,609 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:37:46,014 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:46,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:37:46,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108991319] [2023-11-29 02:37:46,014 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2108991319] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:37:46,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327130654] [2023-11-29 02:37:46,014 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:37:46,014 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:37:46,014 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:37:46,015 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:37:46,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 02:37:46,502 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:37:46,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:37:46,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 642 conjuncts, 142 conjunts are in the unsatisfiable core [2023-11-29 02:37:46,512 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:37:46,519 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:37:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 0 proven. 902 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:49,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:37:56,130 INFO L134 CoverageAnalysis]: Checked inductivity of 902 backedges. 324 proven. 578 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:37:56,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [327130654] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:37:56,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:37:56,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 41, 41] total 125 [2023-11-29 02:37:56,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205111556] [2023-11-29 02:37:56,130 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:37:56,131 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 126 states [2023-11-29 02:37:56,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:37:56,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 126 interpolants. [2023-11-29 02:37:56,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1004, Invalid=14746, Unknown=0, NotChecked=0, Total=15750 [2023-11-29 02:37:56,133 INFO L87 Difference]: Start difference. First operand 114 states and 116 transitions. Second operand has 126 states, 125 states have (on average 2.664) internal successors, (333), 126 states have internal predecessors, (333), 0 states have call successors, (0), 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 02:38:04,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:38:04,620 INFO L93 Difference]: Finished difference Result 200 states and 203 transitions. [2023-11-29 02:38:04,620 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-11-29 02:38:04,620 INFO L78 Accepts]: Start accepts. Automaton has has 126 states, 125 states have (on average 2.664) internal successors, (333), 126 states have internal predecessors, (333), 0 states have call successors, (0), 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 113 [2023-11-29 02:38:04,621 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:38:04,622 INFO L225 Difference]: With dead ends: 200 [2023-11-29 02:38:04,622 INFO L226 Difference]: Without dead ends: 200 [2023-11-29 02:38:04,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 352 GetRequests, 145 SyntacticMatches, 0 SemanticMatches, 207 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7808 ImplicationChecksByTransitivity, 14.3s TimeCoverageRelationStatistics Valid=3877, Invalid=39595, Unknown=0, NotChecked=0, Total=43472 [2023-11-29 02:38:04,624 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 603 mSDsluCounter, 1387 mSDsCounter, 0 mSdLazyCounter, 7184 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 603 SdHoareTripleChecker+Valid, 1408 SdHoareTripleChecker+Invalid, 7192 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 7184 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:38:04,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [603 Valid, 1408 Invalid, 7192 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 7184 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-29 02:38:04,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-11-29 02:38:04,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 118. [2023-11-29 02:38:04,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.0256410256410255) internal successors, (120), 117 states have internal predecessors, (120), 0 states have call successors, (0), 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 02:38:04,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 120 transitions. [2023-11-29 02:38:04,627 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 120 transitions. Word has length 113 [2023-11-29 02:38:04,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:38:04,627 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 120 transitions. [2023-11-29 02:38:04,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 126 states, 125 states have (on average 2.664) internal successors, (333), 126 states have internal predecessors, (333), 0 states have call successors, (0), 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 02:38:04,627 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 120 transitions. [2023-11-29 02:38:04,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-29 02:38:04,628 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:38:04,628 INFO L195 NwaCegarLoop]: trace histogram [19, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:38:04,634 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-29 02:38:04,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-29 02:38:04,829 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:38:04,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:38:04,829 INFO L85 PathProgramCache]: Analyzing trace with hash 1403936154, now seen corresponding path program 35 times [2023-11-29 02:38:04,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:38:04,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2052050374] [2023-11-29 02:38:04,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:38:04,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:38:04,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:38:05,895 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 36 proven. 936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:38:05,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:38:05,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2052050374] [2023-11-29 02:38:05,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2052050374] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:38:05,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2140299966] [2023-11-29 02:38:05,895 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:38:05,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:38:05,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:38:05,896 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:38:05,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 02:38:10,899 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 19 check-sat command(s) [2023-11-29 02:38:10,899 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:38:10,909 INFO L262 TraceCheckSpWp]: Trace formula consists of 662 conjuncts, 80 conjunts are in the unsatisfiable core [2023-11-29 02:38:10,911 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:38:11,096 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 36 proven. 936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:38:11,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:38:13,136 INFO L134 CoverageAnalysis]: Checked inductivity of 972 backedges. 36 proven. 936 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:38:13,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2140299966] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:38:13,136 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:38:13,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [42, 42, 42] total 84 [2023-11-29 02:38:13,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1022799875] [2023-11-29 02:38:13,136 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:38:13,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 84 states [2023-11-29 02:38:13,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:38:13,138 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 84 interpolants. [2023-11-29 02:38:13,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=220, Invalid=6752, Unknown=0, NotChecked=0, Total=6972 [2023-11-29 02:38:13,138 INFO L87 Difference]: Start difference. First operand 118 states and 120 transitions. Second operand has 84 states, 84 states have (on average 2.7738095238095237) internal successors, (233), 84 states have internal predecessors, (233), 0 states have call successors, (0), 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 02:38:15,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:38:15,800 INFO L93 Difference]: Finished difference Result 195 states and 197 transitions. [2023-11-29 02:38:15,800 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 60 states. [2023-11-29 02:38:15,800 INFO L78 Accepts]: Start accepts. Automaton has has 84 states, 84 states have (on average 2.7738095238095237) internal successors, (233), 84 states have internal predecessors, (233), 0 states have call successors, (0), 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 117 [2023-11-29 02:38:15,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:38:15,801 INFO L225 Difference]: With dead ends: 195 [2023-11-29 02:38:15,801 INFO L226 Difference]: Without dead ends: 121 [2023-11-29 02:38:15,802 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 311 GetRequests, 192 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1681 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=465, Invalid=14055, Unknown=0, NotChecked=0, Total=14520 [2023-11-29 02:38:15,802 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 75 mSDsluCounter, 3149 mSDsCounter, 0 mSdLazyCounter, 3439 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 3207 SdHoareTripleChecker+Invalid, 3457 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 3439 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:38:15,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 3207 Invalid, 3457 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 3439 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 02:38:15,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-29 02:38:15,804 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2023-11-29 02:38:15,804 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0252100840336134) internal successors, (122), 119 states have internal predecessors, (122), 0 states have call successors, (0), 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 02:38:15,804 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 122 transitions. [2023-11-29 02:38:15,804 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 122 transitions. Word has length 117 [2023-11-29 02:38:15,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:38:15,804 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 122 transitions. [2023-11-29 02:38:15,805 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 84 states, 84 states have (on average 2.7738095238095237) internal successors, (233), 84 states have internal predecessors, (233), 0 states have call successors, (0), 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 02:38:15,805 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 122 transitions. [2023-11-29 02:38:15,805 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-29 02:38:15,805 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:38:15,805 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:38:15,813 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-29 02:38:16,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-29 02:38:16,006 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:38:16,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:38:16,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1057783048, now seen corresponding path program 36 times [2023-11-29 02:38:16,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:38:16,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948077763] [2023-11-29 02:38:16,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:38:16,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:38:16,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:38:18,788 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 0 proven. 1009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:38:18,788 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:38:18,788 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948077763] [2023-11-29 02:38:18,789 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [948077763] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:38:18,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [914658261] [2023-11-29 02:38:18,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:38:18,789 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:38:18,789 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:38:18,790 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:38:18,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 02:38:23,387 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2023-11-29 02:38:23,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:38:23,396 INFO L262 TraceCheckSpWp]: Trace formula consists of 675 conjuncts, 69 conjunts are in the unsatisfiable core [2023-11-29 02:38:23,399 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:38:26,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 324 proven. 685 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:38:26,284 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:38:26,440 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:38:26,441 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 02:38:31,742 INFO L134 CoverageAnalysis]: Checked inductivity of 1009 backedges. 361 proven. 648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:38:31,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [914658261] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:38:31,742 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:38:31,743 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 44, 44] total 118 [2023-11-29 02:38:31,743 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2069978195] [2023-11-29 02:38:31,743 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:38:31,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2023-11-29 02:38:31,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:38:31,744 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2023-11-29 02:38:31,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1058, Invalid=12984, Unknown=0, NotChecked=0, Total=14042 [2023-11-29 02:38:31,746 INFO L87 Difference]: Start difference. First operand 120 states and 122 transitions. Second operand has 119 states, 118 states have (on average 2.4661016949152543) internal successors, (291), 119 states have internal predecessors, (291), 0 states have call successors, (0), 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 02:38:40,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:38:40,780 INFO L93 Difference]: Finished difference Result 210 states and 213 transitions. [2023-11-29 02:38:40,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-11-29 02:38:40,780 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 118 states have (on average 2.4661016949152543) internal successors, (291), 119 states have internal predecessors, (291), 0 states have call successors, (0), 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 119 [2023-11-29 02:38:40,780 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:38:40,781 INFO L225 Difference]: With dead ends: 210 [2023-11-29 02:38:40,781 INFO L226 Difference]: Without dead ends: 210 [2023-11-29 02:38:40,783 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 388 GetRequests, 149 SyntacticMatches, 17 SemanticMatches, 222 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10242 ImplicationChecksByTransitivity, 14.9s TimeCoverageRelationStatistics Valid=5080, Invalid=44872, Unknown=0, NotChecked=0, Total=49952 [2023-11-29 02:38:40,783 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 997 mSDsluCounter, 1105 mSDsCounter, 0 mSdLazyCounter, 5805 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 997 SdHoareTripleChecker+Valid, 1125 SdHoareTripleChecker+Invalid, 5851 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 5805 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:38:40,783 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [997 Valid, 1125 Invalid, 5851 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 5805 Invalid, 0 Unknown, 0 Unchecked, 2.5s Time] [2023-11-29 02:38:40,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2023-11-29 02:38:40,785 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 124. [2023-11-29 02:38:40,785 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 124 states, 123 states have (on average 1.024390243902439) internal successors, (126), 123 states have internal predecessors, (126), 0 states have call successors, (0), 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 02:38:40,785 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 126 transitions. [2023-11-29 02:38:40,786 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 126 transitions. Word has length 119 [2023-11-29 02:38:40,786 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:38:40,786 INFO L495 AbstractCegarLoop]: Abstraction has 124 states and 126 transitions. [2023-11-29 02:38:40,786 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 118 states have (on average 2.4661016949152543) internal successors, (291), 119 states have internal predecessors, (291), 0 states have call successors, (0), 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 02:38:40,786 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 126 transitions. [2023-11-29 02:38:40,786 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 124 [2023-11-29 02:38:40,786 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:38:40,787 INFO L195 NwaCegarLoop]: trace histogram [20, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:38:40,794 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-29 02:38:40,987 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-29 02:38:40,987 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:38:40,987 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:38:40,987 INFO L85 PathProgramCache]: Analyzing trace with hash -1157943430, now seen corresponding path program 37 times [2023-11-29 02:38:40,987 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:38:40,988 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568655534] [2023-11-29 02:38:40,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:38:40,988 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:38:41,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:38:42,196 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 38 proven. 1045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:38:42,196 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:38:42,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568655534] [2023-11-29 02:38:42,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568655534] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:38:42,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527152697] [2023-11-29 02:38:42,197 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:38:42,197 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:38:42,197 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:38:42,198 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:38:42,198 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 02:38:42,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:38:42,771 INFO L262 TraceCheckSpWp]: Trace formula consists of 695 conjuncts, 84 conjunts are in the unsatisfiable core [2023-11-29 02:38:42,773 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:38:42,938 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 38 proven. 1045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:38:42,939 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:38:45,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1083 backedges. 38 proven. 1045 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:38:45,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1527152697] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:38:45,107 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:38:45,107 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [44, 44, 44] total 88 [2023-11-29 02:38:45,107 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144672057] [2023-11-29 02:38:45,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:38:45,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-11-29 02:38:45,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:38:45,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-11-29 02:38:45,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=7426, Unknown=0, NotChecked=0, Total=7656 [2023-11-29 02:38:45,109 INFO L87 Difference]: Start difference. First operand 124 states and 126 transitions. Second operand has 88 states, 88 states have (on average 2.784090909090909) internal successors, (245), 88 states have internal predecessors, (245), 0 states have call successors, (0), 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 02:38:48,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:38:48,067 INFO L93 Difference]: Finished difference Result 205 states and 207 transitions. [2023-11-29 02:38:48,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 63 states. [2023-11-29 02:38:48,068 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.784090909090909) internal successors, (245), 88 states have internal predecessors, (245), 0 states have call successors, (0), 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 123 [2023-11-29 02:38:48,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:38:48,069 INFO L225 Difference]: With dead ends: 205 [2023-11-29 02:38:48,069 INFO L226 Difference]: Without dead ends: 127 [2023-11-29 02:38:48,070 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 327 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1849 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=488, Invalid=15514, Unknown=0, NotChecked=0, Total=16002 [2023-11-29 02:38:48,070 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 80 mSDsluCounter, 3416 mSDsCounter, 0 mSdLazyCounter, 3733 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 3477 SdHoareTripleChecker+Invalid, 3752 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 3733 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:38:48,070 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 3477 Invalid, 3752 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 3733 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 02:38:48,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2023-11-29 02:38:48,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 126. [2023-11-29 02:38:48,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.024) internal successors, (128), 125 states have internal predecessors, (128), 0 states have call successors, (0), 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 02:38:48,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 128 transitions. [2023-11-29 02:38:48,073 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 128 transitions. Word has length 123 [2023-11-29 02:38:48,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:38:48,073 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 128 transitions. [2023-11-29 02:38:48,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.784090909090909) internal successors, (245), 88 states have internal predecessors, (245), 0 states have call successors, (0), 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 02:38:48,073 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 128 transitions. [2023-11-29 02:38:48,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-29 02:38:48,074 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:38:48,074 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:38:48,080 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-29 02:38:48,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-29 02:38:48,275 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:38:48,275 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:38:48,275 INFO L85 PathProgramCache]: Analyzing trace with hash -1007451032, now seen corresponding path program 38 times [2023-11-29 02:38:48,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:38:48,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057255850] [2023-11-29 02:38:48,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:38:48,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:38:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:38:51,048 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:38:51,048 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:38:51,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057255850] [2023-11-29 02:38:51,048 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057255850] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:38:51,048 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [618844629] [2023-11-29 02:38:51,049 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:38:51,049 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:38:51,049 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:38:51,049 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:38:51,052 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-29 02:38:51,269 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:38:51,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:38:51,274 INFO L262 TraceCheckSpWp]: Trace formula consists of 708 conjuncts, 149 conjunts are in the unsatisfiable core [2023-11-29 02:38:51,278 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:38:51,284 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 02:38:54,882 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 0 proven. 1122 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:38:54,882 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:39:01,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1122 backedges. 400 proven. 722 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:39:01,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [618844629] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:39:01,895 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:39:01,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 45, 45] total 137 [2023-11-29 02:39:01,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [621976977] [2023-11-29 02:39:01,895 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:39:01,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2023-11-29 02:39:01,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:39:01,897 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2023-11-29 02:39:01,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=957, Invalid=17949, Unknown=0, NotChecked=0, Total=18906 [2023-11-29 02:39:01,898 INFO L87 Difference]: Start difference. First operand 126 states and 128 transitions. Second operand has 138 states, 137 states have (on average 2.6934306569343067) internal successors, (369), 138 states have internal predecessors, (369), 0 states have call successors, (0), 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 02:39:10,970 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:39:10,970 INFO L93 Difference]: Finished difference Result 220 states and 223 transitions. [2023-11-29 02:39:10,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-11-29 02:39:10,971 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 137 states have (on average 2.6934306569343067) internal successors, (369), 138 states have internal predecessors, (369), 0 states have call successors, (0), 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 125 [2023-11-29 02:39:10,971 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:39:10,972 INFO L225 Difference]: With dead ends: 220 [2023-11-29 02:39:10,972 INFO L226 Difference]: Without dead ends: 220 [2023-11-29 02:39:10,973 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 387 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 226 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11420 ImplicationChecksByTransitivity, 15.2s TimeCoverageRelationStatistics Valid=4387, Invalid=47369, Unknown=0, NotChecked=0, Total=51756 [2023-11-29 02:39:10,974 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 662 mSDsluCounter, 1671 mSDsCounter, 0 mSdLazyCounter, 8551 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 662 SdHoareTripleChecker+Valid, 1694 SdHoareTripleChecker+Invalid, 8558 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 8551 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:39:10,974 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [662 Valid, 1694 Invalid, 8558 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 8551 Invalid, 0 Unknown, 0 Unchecked, 3.4s Time] [2023-11-29 02:39:10,974 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-29 02:39:10,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 130. [2023-11-29 02:39:10,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 130 states, 129 states have (on average 1.0232558139534884) internal successors, (132), 129 states have internal predecessors, (132), 0 states have call successors, (0), 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 02:39:10,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 132 transitions. [2023-11-29 02:39:10,977 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 132 transitions. Word has length 125 [2023-11-29 02:39:10,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:39:10,978 INFO L495 AbstractCegarLoop]: Abstraction has 130 states and 132 transitions. [2023-11-29 02:39:10,978 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 137 states have (on average 2.6934306569343067) internal successors, (369), 138 states have internal predecessors, (369), 0 states have call successors, (0), 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 02:39:10,978 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 132 transitions. [2023-11-29 02:39:10,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 130 [2023-11-29 02:39:10,979 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:39:10,979 INFO L195 NwaCegarLoop]: trace histogram [21, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:39:10,984 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-29 02:39:11,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-29 02:39:11,179 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:39:11,179 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:39:11,179 INFO L85 PathProgramCache]: Analyzing trace with hash -598767910, now seen corresponding path program 39 times [2023-11-29 02:39:11,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:39:11,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713983363] [2023-11-29 02:39:11,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:39:11,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:39:11,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:39:12,481 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 40 proven. 1160 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:39:12,481 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:39:12,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713983363] [2023-11-29 02:39:12,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713983363] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:39:12,481 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [123305286] [2023-11-29 02:39:12,481 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:39:12,481 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:39:12,481 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:39:12,482 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:39:12,483 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-29 02:39:20,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 21 check-sat command(s) [2023-11-29 02:39:20,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:39:20,136 INFO L262 TraceCheckSpWp]: Trace formula consists of 728 conjuncts, 139 conjunts are in the unsatisfiable core [2023-11-29 02:39:20,139 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:39:25,230 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 59 proven. 1141 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:39:25,230 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:39:25,605 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:39:25,606 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 02:39:34,996 INFO L134 CoverageAnalysis]: Checked inductivity of 1200 backedges. 0 proven. 1200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:39:34,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [123305286] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:39:34,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:39:34,997 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [46, 69, 70] total 182 [2023-11-29 02:39:34,997 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1835436879] [2023-11-29 02:39:34,997 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:39:34,997 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 182 states [2023-11-29 02:39:34,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:39:34,999 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 182 interpolants. [2023-11-29 02:39:35,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2156, Invalid=30786, Unknown=0, NotChecked=0, Total=32942 [2023-11-29 02:39:35,000 INFO L87 Difference]: Start difference. First operand 130 states and 132 transitions. Second operand has 182 states, 182 states have (on average 2.0934065934065935) internal successors, (381), 182 states have internal predecessors, (381), 0 states have call successors, (0), 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 02:39:50,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:39:50,078 INFO L93 Difference]: Finished difference Result 215 states and 217 transitions. [2023-11-29 02:39:50,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-11-29 02:39:50,079 INFO L78 Accepts]: Start accepts. Automaton has has 182 states, 182 states have (on average 2.0934065934065935) internal successors, (381), 182 states have internal predecessors, (381), 0 states have call successors, (0), 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 129 [2023-11-29 02:39:50,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:39:50,080 INFO L225 Difference]: With dead ends: 215 [2023-11-29 02:39:50,080 INFO L226 Difference]: Without dead ends: 133 [2023-11-29 02:39:50,082 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 408 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 286 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17151 ImplicationChecksByTransitivity, 25.7s TimeCoverageRelationStatistics Valid=8062, Invalid=74594, Unknown=0, NotChecked=0, Total=82656 [2023-11-29 02:39:50,083 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 397 mSDsluCounter, 2835 mSDsCounter, 0 mSdLazyCounter, 7075 mSolverCounterSat, 64 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 397 SdHoareTripleChecker+Valid, 2876 SdHoareTripleChecker+Invalid, 7139 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 64 IncrementalHoareTripleChecker+Valid, 7075 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:39:50,083 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [397 Valid, 2876 Invalid, 7139 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [64 Valid, 7075 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-29 02:39:50,083 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2023-11-29 02:39:50,084 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 132. [2023-11-29 02:39:50,084 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.0229007633587786) internal successors, (134), 131 states have internal predecessors, (134), 0 states have call successors, (0), 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 02:39:50,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 134 transitions. [2023-11-29 02:39:50,085 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 134 transitions. Word has length 129 [2023-11-29 02:39:50,085 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:39:50,085 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 134 transitions. [2023-11-29 02:39:50,085 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 182 states, 182 states have (on average 2.0934065934065935) internal successors, (381), 182 states have internal predecessors, (381), 0 states have call successors, (0), 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 02:39:50,085 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 134 transitions. [2023-11-29 02:39:50,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-29 02:39:50,086 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:39:50,086 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:39:50,093 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-29 02:39:50,286 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:39:50,286 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:39:50,286 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:39:50,287 INFO L85 PathProgramCache]: Analyzing trace with hash 79950152, now seen corresponding path program 40 times [2023-11-29 02:39:50,287 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:39:50,287 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501392370] [2023-11-29 02:39:50,287 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:39:50,287 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:39:50,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:39:53,208 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 0 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:39:53,208 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:39:53,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501392370] [2023-11-29 02:39:53,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501392370] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:39:53,208 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526315323] [2023-11-29 02:39:53,208 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:39:53,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:39:53,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:39:53,209 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:39:53,210 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-29 02:39:53,701 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:39:53,701 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:39:53,707 INFO L262 TraceCheckSpWp]: Trace formula consists of 741 conjuncts, 160 conjunts are in the unsatisfiable core [2023-11-29 02:39:53,710 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:39:53,718 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:39:57,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 0 proven. 1241 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:39:57,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:40:04,897 INFO L134 CoverageAnalysis]: Checked inductivity of 1241 backedges. 441 proven. 800 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:40:04,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1526315323] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:40:04,897 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:40:04,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 47, 47] total 143 [2023-11-29 02:40:04,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281355686] [2023-11-29 02:40:04,897 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:40:04,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 144 states [2023-11-29 02:40:04,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:40:04,899 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 144 interpolants. [2023-11-29 02:40:04,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1057, Invalid=19535, Unknown=0, NotChecked=0, Total=20592 [2023-11-29 02:40:04,900 INFO L87 Difference]: Start difference. First operand 132 states and 134 transitions. Second operand has 144 states, 143 states have (on average 2.7062937062937062) internal successors, (387), 144 states have internal predecessors, (387), 0 states have call successors, (0), 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 02:40:14,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:40:14,747 INFO L93 Difference]: Finished difference Result 230 states and 233 transitions. [2023-11-29 02:40:14,747 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 120 states. [2023-11-29 02:40:14,747 INFO L78 Accepts]: Start accepts. Automaton has has 144 states, 143 states have (on average 2.7062937062937062) internal successors, (387), 144 states have internal predecessors, (387), 0 states have call successors, (0), 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 131 [2023-11-29 02:40:14,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:40:14,749 INFO L225 Difference]: With dead ends: 230 [2023-11-29 02:40:14,749 INFO L226 Difference]: Without dead ends: 230 [2023-11-29 02:40:14,751 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 407 GetRequests, 169 SyntacticMatches, 0 SemanticMatches, 238 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12605 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=4840, Invalid=52520, Unknown=0, NotChecked=0, Total=57360 [2023-11-29 02:40:14,751 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 693 mSDsluCounter, 1834 mSDsCounter, 0 mSdLazyCounter, 9182 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 1858 SdHoareTripleChecker+Invalid, 9190 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 9182 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:40:14,751 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 1858 Invalid, 9190 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 9182 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-29 02:40:14,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2023-11-29 02:40:14,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 136. [2023-11-29 02:40:14,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.0222222222222221) internal successors, (138), 135 states have internal predecessors, (138), 0 states have call successors, (0), 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 02:40:14,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 138 transitions. [2023-11-29 02:40:14,754 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 138 transitions. Word has length 131 [2023-11-29 02:40:14,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:40:14,755 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 138 transitions. [2023-11-29 02:40:14,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 144 states, 143 states have (on average 2.7062937062937062) internal successors, (387), 144 states have internal predecessors, (387), 0 states have call successors, (0), 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 02:40:14,755 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 138 transitions. [2023-11-29 02:40:14,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 136 [2023-11-29 02:40:14,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:40:14,756 INFO L195 NwaCegarLoop]: trace histogram [22, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:40:14,761 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-11-29 02:40:14,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-11-29 02:40:14,956 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:40:14,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:40:14,957 INFO L85 PathProgramCache]: Analyzing trace with hash 861832122, now seen corresponding path program 41 times [2023-11-29 02:40:14,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:40:14,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413575404] [2023-11-29 02:40:14,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:14,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:40:15,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:16,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 42 proven. 1281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:40:16,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:40:16,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413575404] [2023-11-29 02:40:16,338 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [413575404] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:16,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1121654666] [2023-11-29 02:40:16,338 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:40:16,338 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:16,338 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:40:16,339 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:40:16,340 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-29 02:40:27,795 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 22 check-sat command(s) [2023-11-29 02:40:27,795 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:40:27,808 INFO L262 TraceCheckSpWp]: Trace formula consists of 761 conjuncts, 92 conjunts are in the unsatisfiable core [2023-11-29 02:40:27,810 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:40:27,982 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 42 proven. 1281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:40:27,982 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:40:30,774 INFO L134 CoverageAnalysis]: Checked inductivity of 1323 backedges. 42 proven. 1281 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:40:30,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1121654666] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:40:30,774 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:40:30,774 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [48, 48, 48] total 96 [2023-11-29 02:40:30,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391999944] [2023-11-29 02:40:30,775 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:40:30,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 96 states [2023-11-29 02:40:30,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:40:30,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 96 interpolants. [2023-11-29 02:40:30,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=250, Invalid=8870, Unknown=0, NotChecked=0, Total=9120 [2023-11-29 02:40:30,777 INFO L87 Difference]: Start difference. First operand 136 states and 138 transitions. Second operand has 96 states, 96 states have (on average 2.8020833333333335) internal successors, (269), 96 states have internal predecessors, (269), 0 states have call successors, (0), 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 02:40:34,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:40:34,411 INFO L93 Difference]: Finished difference Result 225 states and 227 transitions. [2023-11-29 02:40:34,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-29 02:40:34,411 INFO L78 Accepts]: Start accepts. Automaton has has 96 states, 96 states have (on average 2.8020833333333335) internal successors, (269), 96 states have internal predecessors, (269), 0 states have call successors, (0), 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 135 [2023-11-29 02:40:34,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:40:34,412 INFO L225 Difference]: With dead ends: 225 [2023-11-29 02:40:34,412 INFO L226 Difference]: Without dead ends: 139 [2023-11-29 02:40:34,413 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 222 SyntacticMatches, 0 SemanticMatches, 137 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2209 ImplicationChecksByTransitivity, 5.1s TimeCoverageRelationStatistics Valid=534, Invalid=18648, Unknown=0, NotChecked=0, Total=19182 [2023-11-29 02:40:34,414 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 256 mSDsluCounter, 4531 mSDsCounter, 0 mSdLazyCounter, 4879 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 256 SdHoareTripleChecker+Valid, 4598 SdHoareTripleChecker+Invalid, 4901 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 4879 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:40:34,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [256 Valid, 4598 Invalid, 4901 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 4879 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 02:40:34,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2023-11-29 02:40:34,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 138. [2023-11-29 02:40:34,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0218978102189782) internal successors, (140), 137 states have internal predecessors, (140), 0 states have call successors, (0), 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 02:40:34,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 140 transitions. [2023-11-29 02:40:34,416 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 140 transitions. Word has length 135 [2023-11-29 02:40:34,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:40:34,416 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 140 transitions. [2023-11-29 02:40:34,416 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 96 states, 96 states have (on average 2.8020833333333335) internal successors, (269), 96 states have internal predecessors, (269), 0 states have call successors, (0), 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 02:40:34,417 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 140 transitions. [2023-11-29 02:40:34,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-29 02:40:34,417 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:40:34,417 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:40:34,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-11-29 02:40:34,617 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-11-29 02:40:34,618 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:40:34,618 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:40:34,618 INFO L85 PathProgramCache]: Analyzing trace with hash 1145627560, now seen corresponding path program 42 times [2023-11-29 02:40:34,618 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:40:34,618 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371868641] [2023-11-29 02:40:34,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:40:34,618 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:40:34,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:40:37,975 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 0 proven. 1366 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:40:37,975 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:40:37,975 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371868641] [2023-11-29 02:40:37,976 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1371868641] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:40:37,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171263406] [2023-11-29 02:40:37,976 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:40:37,976 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:40:37,976 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:40:37,977 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:40:37,977 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-29 02:40:49,402 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2023-11-29 02:40:49,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:40:49,415 INFO L262 TraceCheckSpWp]: Trace formula consists of 774 conjuncts, 85 conjunts are in the unsatisfiable core [2023-11-29 02:40:49,418 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:40:53,054 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 441 proven. 925 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:40:53,054 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:40:53,245 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:40:53,245 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 17 treesize of output 21 [2023-11-29 02:40:59,942 INFO L134 CoverageAnalysis]: Checked inductivity of 1366 backedges. 484 proven. 882 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:40:59,942 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [171263406] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:40:59,942 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:40:59,942 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 50, 50] total 133 [2023-11-29 02:40:59,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [851483700] [2023-11-29 02:40:59,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:40:59,943 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2023-11-29 02:40:59,943 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:40:59,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2023-11-29 02:40:59,945 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1346, Invalid=16476, Unknown=0, NotChecked=0, Total=17822 [2023-11-29 02:40:59,945 INFO L87 Difference]: Start difference. First operand 138 states and 140 transitions. Second operand has 134 states, 133 states have (on average 2.5037593984962405) internal successors, (333), 134 states have internal predecessors, (333), 0 states have call successors, (0), 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 02:41:10,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:41:10,952 INFO L93 Difference]: Finished difference Result 240 states and 243 transitions. [2023-11-29 02:41:10,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 125 states. [2023-11-29 02:41:10,953 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 133 states have (on average 2.5037593984962405) internal successors, (333), 134 states have internal predecessors, (333), 0 states have call successors, (0), 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 137 [2023-11-29 02:41:10,953 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:41:10,954 INFO L225 Difference]: With dead ends: 240 [2023-11-29 02:41:10,954 INFO L226 Difference]: Without dead ends: 240 [2023-11-29 02:41:10,956 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 445 GetRequests, 173 SyntacticMatches, 20 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13290 ImplicationChecksByTransitivity, 18.5s TimeCoverageRelationStatistics Valid=6445, Invalid=57817, Unknown=0, NotChecked=0, Total=64262 [2023-11-29 02:41:10,957 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 857 mSDsluCounter, 1403 mSDsCounter, 0 mSdLazyCounter, 7261 mSolverCounterSat, 88 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 1426 SdHoareTripleChecker+Invalid, 7349 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 88 IncrementalHoareTripleChecker+Valid, 7261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:41:10,957 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 1426 Invalid, 7349 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [88 Valid, 7261 Invalid, 0 Unknown, 0 Unchecked, 3.0s Time] [2023-11-29 02:41:10,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 240 states. [2023-11-29 02:41:10,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 240 to 142. [2023-11-29 02:41:10,959 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.0212765957446808) internal successors, (144), 141 states have internal predecessors, (144), 0 states have call successors, (0), 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 02:41:10,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 144 transitions. [2023-11-29 02:41:10,959 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 144 transitions. Word has length 137 [2023-11-29 02:41:10,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:41:10,959 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 144 transitions. [2023-11-29 02:41:10,960 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 133 states have (on average 2.5037593984962405) internal successors, (333), 134 states have internal predecessors, (333), 0 states have call successors, (0), 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 02:41:10,960 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 144 transitions. [2023-11-29 02:41:10,960 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 142 [2023-11-29 02:41:10,960 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:41:10,960 INFO L195 NwaCegarLoop]: trace histogram [23, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:41:10,971 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-29 02:41:11,161 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:41:11,161 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:41:11,161 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:41:11,161 INFO L85 PathProgramCache]: Analyzing trace with hash 1751336474, now seen corresponding path program 43 times [2023-11-29 02:41:11,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:41:11,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546685862] [2023-11-29 02:41:11,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:41:11,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:41:11,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:41:12,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 44 proven. 1408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:41:12,666 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:41:12,666 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546685862] [2023-11-29 02:41:12,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546685862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:41:12,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380384381] [2023-11-29 02:41:12,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:41:12,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:41:12,667 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:41:12,668 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:41:12,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-29 02:41:13,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:41:13,111 INFO L262 TraceCheckSpWp]: Trace formula consists of 794 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-29 02:41:13,113 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:41:13,295 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 44 proven. 1408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:41:13,296 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:41:16,107 INFO L134 CoverageAnalysis]: Checked inductivity of 1452 backedges. 44 proven. 1408 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:41:16,107 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [380384381] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:41:16,108 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:41:16,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [50, 50, 50] total 100 [2023-11-29 02:41:16,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1415867153] [2023-11-29 02:41:16,108 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:41:16,108 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-11-29 02:41:16,108 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:41:16,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-11-29 02:41:16,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=260, Invalid=9640, Unknown=0, NotChecked=0, Total=9900 [2023-11-29 02:41:16,110 INFO L87 Difference]: Start difference. First operand 142 states and 144 transitions. Second operand has 100 states, 100 states have (on average 2.81) internal successors, (281), 100 states have internal predecessors, (281), 0 states have call successors, (0), 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 02:41:20,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:41:20,027 INFO L93 Difference]: Finished difference Result 235 states and 237 transitions. [2023-11-29 02:41:20,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-29 02:41:20,028 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.81) internal successors, (281), 100 states have internal predecessors, (281), 0 states have call successors, (0), 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 141 [2023-11-29 02:41:20,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:41:20,029 INFO L225 Difference]: With dead ends: 235 [2023-11-29 02:41:20,029 INFO L226 Difference]: Without dead ends: 145 [2023-11-29 02:41:20,030 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 375 GetRequests, 232 SyntacticMatches, 0 SemanticMatches, 143 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2401 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=557, Invalid=20323, Unknown=0, NotChecked=0, Total=20880 [2023-11-29 02:41:20,030 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 179 mSDsluCounter, 4694 mSDsCounter, 0 mSdLazyCounter, 4962 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 4764 SdHoareTripleChecker+Invalid, 4985 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 4962 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:41:20,030 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 4764 Invalid, 4985 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 4962 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 02:41:20,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2023-11-29 02:41:20,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 144. [2023-11-29 02:41:20,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.020979020979021) internal successors, (146), 143 states have internal predecessors, (146), 0 states have call successors, (0), 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 02:41:20,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 146 transitions. [2023-11-29 02:41:20,033 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 146 transitions. Word has length 141 [2023-11-29 02:41:20,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:41:20,033 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 146 transitions. [2023-11-29 02:41:20,033 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.81) internal successors, (281), 100 states have internal predecessors, (281), 0 states have call successors, (0), 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 02:41:20,033 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 146 transitions. [2023-11-29 02:41:20,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-29 02:41:20,034 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:41:20,034 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:41:20,040 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-29 02:41:20,234 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:41:20,234 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:41:20,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:41:20,234 INFO L85 PathProgramCache]: Analyzing trace with hash 1070955400, now seen corresponding path program 44 times [2023-11-29 02:41:20,235 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:41:20,235 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268707865] [2023-11-29 02:41:20,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:41:20,235 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:41:20,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:41:23,895 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 0 proven. 1497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:41:23,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:41:23,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268707865] [2023-11-29 02:41:23,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268707865] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:41:23,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660248754] [2023-11-29 02:41:23,895 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:41:23,895 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:41:23,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:41:23,896 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:41:23,897 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-29 02:41:24,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:41:24,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:41:24,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 807 conjuncts, 167 conjunts are in the unsatisfiable core [2023-11-29 02:41:24,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:41:24,134 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 02:41:27,573 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 0 proven. 1497 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:41:27,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:41:36,382 INFO L134 CoverageAnalysis]: Checked inductivity of 1497 backedges. 529 proven. 968 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:41:36,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [660248754] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:41:36,382 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:41:36,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 51, 51] total 132 [2023-11-29 02:41:36,382 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590857728] [2023-11-29 02:41:36,382 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:41:36,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 133 states [2023-11-29 02:41:36,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:41:36,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 133 interpolants. [2023-11-29 02:41:36,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1153, Invalid=16403, Unknown=0, NotChecked=0, Total=17556 [2023-11-29 02:41:36,384 INFO L87 Difference]: Start difference. First operand 144 states and 146 transitions. Second operand has 133 states, 132 states have (on average 2.8636363636363638) internal successors, (378), 133 states have internal predecessors, (378), 0 states have call successors, (0), 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 02:41:49,400 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:41:49,400 INFO L93 Difference]: Finished difference Result 250 states and 253 transitions. [2023-11-29 02:41:49,400 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 128 states. [2023-11-29 02:41:49,400 INFO L78 Accepts]: Start accepts. Automaton has has 133 states, 132 states have (on average 2.8636363636363638) internal successors, (378), 133 states have internal predecessors, (378), 0 states have call successors, (0), 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 143 [2023-11-29 02:41:49,400 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:41:49,401 INFO L225 Difference]: With dead ends: 250 [2023-11-29 02:41:49,401 INFO L226 Difference]: Without dead ends: 250 [2023-11-29 02:41:49,403 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 440 GetRequests, 207 SyntacticMatches, 1 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10227 ImplicationChecksByTransitivity, 19.9s TimeCoverageRelationStatistics Valid=5416, Invalid=49106, Unknown=0, NotChecked=0, Total=54522 [2023-11-29 02:41:49,403 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 560 mSDsluCounter, 1812 mSDsCounter, 0 mSdLazyCounter, 9231 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 560 SdHoareTripleChecker+Valid, 1838 SdHoareTripleChecker+Invalid, 9238 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 9231 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:41:49,404 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [560 Valid, 1838 Invalid, 9238 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 9231 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-29 02:41:49,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2023-11-29 02:41:49,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 148. [2023-11-29 02:41:49,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 148 states, 147 states have (on average 1.0204081632653061) internal successors, (150), 147 states have internal predecessors, (150), 0 states have call successors, (0), 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 02:41:49,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 150 transitions. [2023-11-29 02:41:49,407 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 150 transitions. Word has length 143 [2023-11-29 02:41:49,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:41:49,407 INFO L495 AbstractCegarLoop]: Abstraction has 148 states and 150 transitions. [2023-11-29 02:41:49,407 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 133 states, 132 states have (on average 2.8636363636363638) internal successors, (378), 133 states have internal predecessors, (378), 0 states have call successors, (0), 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 02:41:49,408 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 150 transitions. [2023-11-29 02:41:49,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-29 02:41:49,408 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:41:49,408 INFO L195 NwaCegarLoop]: trace histogram [24, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:41:49,414 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-11-29 02:41:49,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2023-11-29 02:41:49,609 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:41:49,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:41:49,609 INFO L85 PathProgramCache]: Analyzing trace with hash 438365690, now seen corresponding path program 45 times [2023-11-29 02:41:49,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:41:49,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1224556814] [2023-11-29 02:41:49,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:41:49,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:41:49,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:41:51,216 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 46 proven. 1541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:41:51,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:41:51,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1224556814] [2023-11-29 02:41:51,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1224556814] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:41:51,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074642831] [2023-11-29 02:41:51,217 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:41:51,217 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:41:51,217 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:41:51,218 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:41:51,219 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-29 02:42:05,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 24 check-sat command(s) [2023-11-29 02:42:05,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:42:05,858 INFO L262 TraceCheckSpWp]: Trace formula consists of 827 conjuncts, 100 conjunts are in the unsatisfiable core [2023-11-29 02:42:05,860 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:42:06,051 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 46 proven. 1541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:42:06,051 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:42:09,292 INFO L134 CoverageAnalysis]: Checked inductivity of 1587 backedges. 46 proven. 1541 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:42:09,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2074642831] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:42:09,293 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:42:09,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [52, 52, 52] total 104 [2023-11-29 02:42:09,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134836944] [2023-11-29 02:42:09,293 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:42:09,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 104 states [2023-11-29 02:42:09,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:42:09,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 104 interpolants. [2023-11-29 02:42:09,295 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=10442, Unknown=0, NotChecked=0, Total=10712 [2023-11-29 02:42:09,295 INFO L87 Difference]: Start difference. First operand 148 states and 150 transitions. Second operand has 104 states, 104 states have (on average 2.8173076923076925) internal successors, (293), 104 states have internal predecessors, (293), 0 states have call successors, (0), 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 02:42:13,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:42:13,587 INFO L93 Difference]: Finished difference Result 245 states and 247 transitions. [2023-11-29 02:42:13,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-11-29 02:42:13,587 INFO L78 Accepts]: Start accepts. Automaton has has 104 states, 104 states have (on average 2.8173076923076925) internal successors, (293), 104 states have internal predecessors, (293), 0 states have call successors, (0), 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 147 [2023-11-29 02:42:13,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:42:13,588 INFO L225 Difference]: With dead ends: 245 [2023-11-29 02:42:13,588 INFO L226 Difference]: Without dead ends: 151 [2023-11-29 02:42:13,589 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 391 GetRequests, 242 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2601 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=580, Invalid=22070, Unknown=0, NotChecked=0, Total=22650 [2023-11-29 02:42:13,589 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 187 mSDsluCounter, 5066 mSDsCounter, 0 mSdLazyCounter, 5509 mSolverCounterSat, 24 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 187 SdHoareTripleChecker+Valid, 5139 SdHoareTripleChecker+Invalid, 5533 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 24 IncrementalHoareTripleChecker+Valid, 5509 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:42:13,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [187 Valid, 5139 Invalid, 5533 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [24 Valid, 5509 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 02:42:13,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2023-11-29 02:42:13,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 150. [2023-11-29 02:42:13,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0201342281879195) internal successors, (152), 149 states have internal predecessors, (152), 0 states have call successors, (0), 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 02:42:13,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 152 transitions. [2023-11-29 02:42:13,592 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 152 transitions. Word has length 147 [2023-11-29 02:42:13,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:42:13,592 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 152 transitions. [2023-11-29 02:42:13,592 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 104 states, 104 states have (on average 2.8173076923076925) internal successors, (293), 104 states have internal predecessors, (293), 0 states have call successors, (0), 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 02:42:13,592 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 152 transitions. [2023-11-29 02:42:13,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-29 02:42:13,593 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:42:13,593 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:42:13,604 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-11-29 02:42:13,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:42:13,793 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:42:13,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:42:13,794 INFO L85 PathProgramCache]: Analyzing trace with hash 2034555112, now seen corresponding path program 46 times [2023-11-29 02:42:13,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:42:13,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523691000] [2023-11-29 02:42:13,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:42:13,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:42:13,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:42:17,732 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 1634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:42:17,732 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:42:17,732 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523691000] [2023-11-29 02:42:17,732 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [523691000] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:42:17,733 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265178606] [2023-11-29 02:42:17,733 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:42:17,733 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:42:17,733 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:42:17,734 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:42:17,734 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-29 02:42:18,444 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:42:18,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:42:18,452 INFO L262 TraceCheckSpWp]: Trace formula consists of 840 conjuncts, 173 conjunts are in the unsatisfiable core [2023-11-29 02:42:18,455 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:42:18,460 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 02:42:23,468 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 0 proven. 1634 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:42:23,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:42:33,284 INFO L134 CoverageAnalysis]: Checked inductivity of 1634 backedges. 576 proven. 1058 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:42:33,284 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [265178606] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:42:33,284 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:42:33,284 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 53, 53] total 137 [2023-11-29 02:42:33,285 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1555047639] [2023-11-29 02:42:33,285 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:42:33,285 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2023-11-29 02:42:33,285 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:42:33,286 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2023-11-29 02:42:33,287 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1354, Invalid=17552, Unknown=0, NotChecked=0, Total=18906 [2023-11-29 02:42:33,287 INFO L87 Difference]: Start difference. First operand 150 states and 152 transitions. Second operand has 138 states, 137 states have (on average 2.875912408759124) internal successors, (394), 138 states have internal predecessors, (394), 0 states have call successors, (0), 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 02:42:49,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:42:49,945 INFO L93 Difference]: Finished difference Result 260 states and 263 transitions. [2023-11-29 02:42:49,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 133 states. [2023-11-29 02:42:49,946 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 137 states have (on average 2.875912408759124) internal successors, (394), 138 states have internal predecessors, (394), 0 states have call successors, (0), 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 149 [2023-11-29 02:42:49,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:42:49,947 INFO L225 Difference]: With dead ends: 260 [2023-11-29 02:42:49,947 INFO L226 Difference]: Without dead ends: 260 [2023-11-29 02:42:49,950 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 458 GetRequests, 216 SyntacticMatches, 1 SemanticMatches, 241 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11207 ImplicationChecksByTransitivity, 25.4s TimeCoverageRelationStatistics Valid=6086, Invalid=52720, Unknown=0, NotChecked=0, Total=58806 [2023-11-29 02:42:49,951 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 678 mSDsluCounter, 1613 mSDsCounter, 0 mSdLazyCounter, 8073 mSolverCounterSat, 53 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1640 SdHoareTripleChecker+Invalid, 8126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 53 IncrementalHoareTripleChecker+Valid, 8073 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:42:49,951 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 1640 Invalid, 8126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [53 Valid, 8073 Invalid, 0 Unknown, 0 Unchecked, 4.1s Time] [2023-11-29 02:42:49,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-29 02:42:49,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 154. [2023-11-29 02:42:49,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 154 states, 153 states have (on average 1.0196078431372548) internal successors, (156), 153 states have internal predecessors, (156), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:42:49,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 156 transitions. [2023-11-29 02:42:49,954 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 156 transitions. Word has length 149 [2023-11-29 02:42:49,955 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:42:49,955 INFO L495 AbstractCegarLoop]: Abstraction has 154 states and 156 transitions. [2023-11-29 02:42:49,955 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 137 states have (on average 2.875912408759124) internal successors, (394), 138 states have internal predecessors, (394), 0 states have call successors, (0), 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 02:42:49,955 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 156 transitions. [2023-11-29 02:42:49,956 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 154 [2023-11-29 02:42:49,956 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:42:49,956 INFO L195 NwaCegarLoop]: trace histogram [25, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:42:49,963 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2023-11-29 02:42:50,156 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:42:50,156 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 2 more)] === [2023-11-29 02:42:50,157 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:42:50,157 INFO L85 PathProgramCache]: Analyzing trace with hash 669162330, now seen corresponding path program 47 times [2023-11-29 02:42:50,157 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:42:50,157 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696078486] [2023-11-29 02:42:50,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:42:50,157 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:42:50,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:42:51,891 INFO L134 CoverageAnalysis]: Checked inductivity of 1728 backedges. 48 proven. 1680 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:42:51,891 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:42:51,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696078486] [2023-11-29 02:42:51,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696078486] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:42:51,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761198831] [2023-11-29 02:42:51,892 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:42:51,892 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:42:51,892 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:42:51,893 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:42:51,893 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_32a52e6e-8887-455d-b65f-e76d7b909573/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process