./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/strreplace-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_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/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_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/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_1625b507-dfc9-4393-8c4d-d260075a50fe/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 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 00:46:49,972 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 00:46:50,037 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 00:46:50,042 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 00:46:50,042 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 00:46:50,067 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 00:46:50,067 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 00:46:50,068 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 00:46:50,069 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 00:46:50,069 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 00:46:50,070 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 00:46:50,070 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 00:46:50,071 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 00:46:50,071 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 00:46:50,072 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 00:46:50,072 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 00:46:50,073 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 00:46:50,073 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 00:46:50,074 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 00:46:50,074 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 00:46:50,075 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 00:46:50,076 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 00:46:50,076 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 00:46:50,077 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 00:46:50,077 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 00:46:50,078 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 00:46:50,078 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 00:46:50,079 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 00:46:50,079 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 00:46:50,080 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 00:46:50,080 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 00:46:50,080 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 00:46:50,080 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:46:50,081 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 00:46:50,081 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 00:46:50,081 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 00:46:50,081 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 00:46:50,081 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 00:46:50,082 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 00:46:50,082 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 00:46:50,082 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 00:46:50,082 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_1625b507-dfc9-4393-8c4d-d260075a50fe/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 961e7f6fbd61acd9d4f1771460dcf26fd486b3de35e5e0e3ca8e6e03bda0fabc [2023-11-29 00:46:50,309 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 00:46:50,330 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 00:46:50,333 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 00:46:50,334 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 00:46:50,334 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 00:46:50,336 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2023-11-29 00:46:53,064 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 00:46:53,293 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 00:46:53,294 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/sv-benchmarks/c/array-memsafety/strreplace-alloca-2.i [2023-11-29 00:46:53,308 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/data/6e88e7466/1cd37c581d6245999922fdf10b11eeb5/FLAG56b057ff5 [2023-11-29 00:46:53,322 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/data/6e88e7466/1cd37c581d6245999922fdf10b11eeb5 [2023-11-29 00:46:53,325 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 00:46:53,327 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 00:46:53,328 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 00:46:53,328 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 00:46:53,333 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 00:46:53,334 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:46:53" (1/1) ... [2023-11-29 00:46:53,335 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6485ce1e and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:46:53, skipping insertion in model container [2023-11-29 00:46:53,335 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 12:46:53" (1/1) ... [2023-11-29 00:46:53,379 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 00:46:53,640 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:46:53,652 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 00:46:53,688 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 00:46:53,718 INFO L206 MainTranslator]: Completed translation [2023-11-29 00:46:53,719 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:46:53 WrapperNode [2023-11-29 00:46:53,719 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 00:46:53,720 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 00:46:53,720 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 00:46:53,720 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 00:46:53,728 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:46:53" (1/1) ... [2023-11-29 00:46:53,741 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:46:53" (1/1) ... [2023-11-29 00:46:53,764 INFO L138 Inliner]: procedures = 117, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 66 [2023-11-29 00:46:53,764 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 00:46:53,765 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 00:46:53,765 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 00:46:53,765 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 00:46:53,776 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:46:53" (1/1) ... [2023-11-29 00:46:53,777 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:46:53" (1/1) ... [2023-11-29 00:46:53,780 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:46:53" (1/1) ... [2023-11-29 00:46:53,794 INFO L175 MemorySlicer]: Split 5 memory accesses to 1 slices as follows [5]. 100 percent of accesses are in the largest equivalence class. The 0 initializations are split as follows [0]. The 3 writes are split as follows [3]. [2023-11-29 00:46:53,794 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:46:53" (1/1) ... [2023-11-29 00:46:53,794 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:46:53" (1/1) ... [2023-11-29 00:46:53,800 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:46:53" (1/1) ... [2023-11-29 00:46:53,804 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:46:53" (1/1) ... [2023-11-29 00:46:53,805 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:46:53" (1/1) ... [2023-11-29 00:46:53,806 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:46:53" (1/1) ... [2023-11-29 00:46:53,809 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 00:46:53,810 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 00:46:53,810 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 00:46:53,811 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 00:46:53,812 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:46:53" (1/1) ... [2023-11-29 00:46:53,818 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 00:46:53,828 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:46:53,840 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 00:46:53,842 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 00:46:53,869 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 00:46:53,870 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 00:46:53,870 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 00:46:53,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 00:46:53,870 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 00:46:53,870 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 00:46:53,971 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 00:46:53,973 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 00:46:54,120 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 00:46:54,151 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 00:46:54,151 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 00:46:54,152 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:46:54 BoogieIcfgContainer [2023-11-29 00:46:54,152 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 00:46:54,155 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 00:46:54,155 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 00:46:54,158 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 00:46:54,159 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 12:46:53" (1/3) ... [2023-11-29 00:46:54,160 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43bd40b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:46:54, skipping insertion in model container [2023-11-29 00:46:54,160 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 12:46:53" (2/3) ... [2023-11-29 00:46:54,160 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@43bd40b8 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 12:46:54, skipping insertion in model container [2023-11-29 00:46:54,160 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 12:46:54" (3/3) ... [2023-11-29 00:46:54,162 INFO L112 eAbstractionObserver]: Analyzing ICFG strreplace-alloca-2.i [2023-11-29 00:46:54,182 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 00:46:54,182 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-11-29 00:46:54,230 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 00:46:54,237 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;@7734410d, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 00:46:54,237 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-29 00:46:54,242 INFO L276 IsEmpty]: Start isEmpty. Operand has 27 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 26 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 00:46:54,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 00:46:54,248 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:46:54,249 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 00:46:54,249 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:46:54,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:46:54,256 INFO L85 PathProgramCache]: Analyzing trace with hash 93433771, now seen corresponding path program 1 times [2023-11-29 00:46:54,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:46:54,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464355392] [2023-11-29 00:46:54,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:46:54,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:46:54,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:46:54,508 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 00:46:54,508 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:46:54,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464355392] [2023-11-29 00:46:54,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [464355392] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:46:54,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:46:54,510 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:46:54,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684182072] [2023-11-29 00:46:54,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:46:54,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:46:54,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:46:54,548 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:46:54,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:46:54,551 INFO L87 Difference]: Start difference. First operand has 27 states, 15 states have (on average 2.1333333333333333) internal successors, (32), 26 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) Second operand has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:54,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:46:54,620 INFO L93 Difference]: Finished difference Result 48 states and 53 transitions. [2023-11-29 00:46:54,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:46:54,623 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-29 00:46:54,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:46:54,631 INFO L225 Difference]: With dead ends: 48 [2023-11-29 00:46:54,631 INFO L226 Difference]: Without dead ends: 47 [2023-11-29 00:46:54,633 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:46:54,636 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 21 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 34 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 55 SdHoareTripleChecker+Invalid, 34 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 34 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:46:54,637 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 55 Invalid, 34 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 34 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:46:54,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 47 states. [2023-11-29 00:46:54,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 47 to 28. [2023-11-29 00:46:54,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 17 states have (on average 1.8235294117647058) internal successors, (31), 27 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 00:46:54,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 31 transitions. [2023-11-29 00:46:54,670 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 31 transitions. Word has length 5 [2023-11-29 00:46:54,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:46:54,670 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 31 transitions. [2023-11-29 00:46:54,670 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:54,671 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 31 transitions. [2023-11-29 00:46:54,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 00:46:54,671 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:46:54,671 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 00:46:54,671 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 00:46:54,672 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:46:54,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:46:54,673 INFO L85 PathProgramCache]: Analyzing trace with hash 93493353, now seen corresponding path program 1 times [2023-11-29 00:46:54,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:46:54,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820263558] [2023-11-29 00:46:54,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:46:54,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:46:54,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:46:54,762 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 00:46:54,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:46:54,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820263558] [2023-11-29 00:46:54,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [820263558] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:46:54,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:46:54,764 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:46:54,764 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [27174324] [2023-11-29 00:46:54,764 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:46:54,765 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:46:54,765 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:46:54,766 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:46:54,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:46:54,766 INFO L87 Difference]: Start difference. First operand 28 states and 31 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:54,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:46:54,793 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-11-29 00:46:54,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:46:54,793 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-29 00:46:54,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:46:54,794 INFO L225 Difference]: With dead ends: 26 [2023-11-29 00:46:54,794 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 00:46:54,795 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 00:46:54,796 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 20 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 17 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:46:54,797 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 17 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:46:54,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 00:46:54,800 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-29 00:46:54,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.7058823529411764) internal successors, (29), 25 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 00:46:54,801 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-11-29 00:46:54,801 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 5 [2023-11-29 00:46:54,802 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:46:54,802 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-11-29 00:46:54,802 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:54,802 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-11-29 00:46:54,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 00:46:54,803 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:46:54,803 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 00:46:54,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 00:46:54,803 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:46:54,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:46:54,804 INFO L85 PathProgramCache]: Analyzing trace with hash 93493354, now seen corresponding path program 1 times [2023-11-29 00:46:54,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:46:54,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287277762] [2023-11-29 00:46:54,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:46:54,805 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:46:54,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:46:54,998 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 00:46:54,998 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:46:54,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287277762] [2023-11-29 00:46:54,999 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287277762] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:46:54,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:46:54,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:46:54,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119123419] [2023-11-29 00:46:54,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:46:55,000 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:46:55,000 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:46:55,001 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:46:55,001 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:46:55,001 INFO L87 Difference]: Start difference. First operand 26 states and 29 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:55,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:46:55,081 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2023-11-29 00:46:55,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:46:55,082 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-29 00:46:55,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:46:55,082 INFO L225 Difference]: With dead ends: 29 [2023-11-29 00:46:55,082 INFO L226 Difference]: Without dead ends: 29 [2023-11-29 00:46:55,083 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 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 00:46:55,084 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 27 mSDsluCounter, 18 mSDsCounter, 0 mSdLazyCounter, 46 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 27 SdHoareTripleChecker+Valid, 34 SdHoareTripleChecker+Invalid, 47 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 46 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:46:55,085 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [27 Valid, 34 Invalid, 47 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 46 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:46:55,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-29 00:46:55,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 28. [2023-11-29 00:46:55,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 19 states have (on average 1.6842105263157894) internal successors, (32), 27 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 00:46:55,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-11-29 00:46:55,090 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 5 [2023-11-29 00:46:55,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:46:55,090 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-11-29 00:46:55,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:55,090 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-11-29 00:46:55,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 00:46:55,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:46:55,091 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 00:46:55,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 00:46:55,092 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:46:55,092 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:46:55,092 INFO L85 PathProgramCache]: Analyzing trace with hash -1398522039, now seen corresponding path program 1 times [2023-11-29 00:46:55,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:46:55,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396369104] [2023-11-29 00:46:55,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:46:55,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:46:55,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:46:55,229 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 00:46:55,229 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:46:55,229 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396369104] [2023-11-29 00:46:55,230 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396369104] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:46:55,230 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:46:55,230 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:46:55,230 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968220362] [2023-11-29 00:46:55,230 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:46:55,231 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:46:55,231 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:46:55,231 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:46:55,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:46:55,232 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:55,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:46:55,270 INFO L93 Difference]: Finished difference Result 45 states and 50 transitions. [2023-11-29 00:46:55,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:46:55,271 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-29 00:46:55,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:46:55,272 INFO L225 Difference]: With dead ends: 45 [2023-11-29 00:46:55,272 INFO L226 Difference]: Without dead ends: 45 [2023-11-29 00:46:55,273 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:46:55,274 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 34 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 31 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 23 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:46:55,275 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 31 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:46:55,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-29 00:46:55,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 30. [2023-11-29 00:46:55,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 21 states have (on average 1.619047619047619) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:55,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-11-29 00:46:55,279 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 6 [2023-11-29 00:46:55,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:46:55,280 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-11-29 00:46:55,280 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:55,280 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-11-29 00:46:55,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 00:46:55,280 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:46:55,281 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 00:46:55,281 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 00:46:55,281 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:46:55,281 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:46:55,281 INFO L85 PathProgramCache]: Analyzing trace with hash -1396674997, now seen corresponding path program 1 times [2023-11-29 00:46:55,282 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:46:55,282 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60369674] [2023-11-29 00:46:55,282 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:46:55,282 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:46:55,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:46:55,400 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 00:46:55,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:46:55,401 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60369674] [2023-11-29 00:46:55,401 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [60369674] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:46:55,401 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:46:55,401 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 00:46:55,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749358409] [2023-11-29 00:46:55,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:46:55,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:46:55,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:46:55,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:46:55,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:46:55,403 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:55,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:46:55,440 INFO L93 Difference]: Finished difference Result 29 states and 33 transitions. [2023-11-29 00:46:55,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:46:55,441 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-29 00:46:55,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:46:55,442 INFO L225 Difference]: With dead ends: 29 [2023-11-29 00:46:55,442 INFO L226 Difference]: Without dead ends: 29 [2023-11-29 00:46:55,442 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:46:55,444 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 40 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 20 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 40 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 22 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 20 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:46:55,444 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [40 Valid, 10 Invalid, 22 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 20 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:46:55,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 29 states. [2023-11-29 00:46:55,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 29 to 27. [2023-11-29 00:46:55,448 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 27 states, 19 states have (on average 1.631578947368421) internal successors, (31), 26 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 00:46:55,448 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 27 states to 27 states and 31 transitions. [2023-11-29 00:46:55,448 INFO L78 Accepts]: Start accepts. Automaton has 27 states and 31 transitions. Word has length 6 [2023-11-29 00:46:55,449 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:46:55,449 INFO L495 AbstractCegarLoop]: Abstraction has 27 states and 31 transitions. [2023-11-29 00:46:55,449 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:55,449 INFO L276 IsEmpty]: Start isEmpty. Operand 27 states and 31 transitions. [2023-11-29 00:46:55,449 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 00:46:55,450 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:46:55,450 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:46:55,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 00:46:55,450 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:46:55,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:46:55,451 INFO L85 PathProgramCache]: Analyzing trace with hash -404508848, now seen corresponding path program 1 times [2023-11-29 00:46:55,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:46:55,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192048385] [2023-11-29 00:46:55,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:46:55,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:46:55,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:46:55,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:46:55,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:46:55,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192048385] [2023-11-29 00:46:55,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192048385] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:46:55,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:46:55,508 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:46:55,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902246256] [2023-11-29 00:46:55,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:46:55,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 00:46:55,508 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:46:55,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 00:46:55,509 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 00:46:55,509 INFO L87 Difference]: Start difference. First operand 27 states and 31 transitions. Second operand has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:55,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:46:55,537 INFO L93 Difference]: Finished difference Result 24 states and 28 transitions. [2023-11-29 00:46:55,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 00:46:55,537 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-11-29 00:46:55,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:46:55,538 INFO L225 Difference]: With dead ends: 24 [2023-11-29 00:46:55,538 INFO L226 Difference]: Without dead ends: 24 [2023-11-29 00:46:55,538 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 00:46:55,539 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 10 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 18 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:46:55,540 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 18 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:46:55,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-29 00:46:55,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-29 00:46:55,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 19 states have (on average 1.4736842105263157) 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 00:46:55,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 28 transitions. [2023-11-29 00:46:55,543 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 28 transitions. Word has length 7 [2023-11-29 00:46:55,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:46:55,544 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 28 transitions. [2023-11-29 00:46:55,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 3.5) internal successors, (7), 3 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:55,544 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 28 transitions. [2023-11-29 00:46:55,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 00:46:55,544 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:46:55,544 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:46:55,545 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 00:46:55,545 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:46:55,545 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:46:55,545 INFO L85 PathProgramCache]: Analyzing trace with hash -404508847, now seen corresponding path program 1 times [2023-11-29 00:46:55,545 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:46:55,546 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [618033097] [2023-11-29 00:46:55,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:46:55,546 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:46:55,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:46:55,718 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 00:46:55,718 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:46:55,718 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [618033097] [2023-11-29 00:46:55,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [618033097] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:46:55,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:46:55,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 00:46:55,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601030921] [2023-11-29 00:46:55,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:46:55,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 00:46:55,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:46:55,720 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 00:46:55,720 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 00:46:55,721 INFO L87 Difference]: Start difference. First operand 24 states and 28 transitions. Second operand has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:55,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:46:55,792 INFO L93 Difference]: Finished difference Result 31 states and 37 transitions. [2023-11-29 00:46:55,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 00:46:55,793 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 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 7 [2023-11-29 00:46:55,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:46:55,793 INFO L225 Difference]: With dead ends: 31 [2023-11-29 00:46:55,793 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 00:46:55,794 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 00:46:55,795 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 33 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 33 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 33 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 33 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:46:55,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [33 Valid, 16 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 33 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:46:55,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 00:46:55,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 29. [2023-11-29 00:46:55,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 29 states, 24 states have (on average 1.4583333333333333) internal successors, (35), 28 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:55,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 29 states to 29 states and 35 transitions. [2023-11-29 00:46:55,800 INFO L78 Accepts]: Start accepts. Automaton has 29 states and 35 transitions. Word has length 7 [2023-11-29 00:46:55,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:46:55,800 INFO L495 AbstractCegarLoop]: Abstraction has 29 states and 35 transitions. [2023-11-29 00:46:55,800 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.75) internal successors, (7), 5 states have internal predecessors, (7), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:55,800 INFO L276 IsEmpty]: Start isEmpty. Operand 29 states and 35 transitions. [2023-11-29 00:46:55,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 00:46:55,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:46:55,801 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-29 00:46:55,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 00:46:55,801 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:46:55,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:46:55,802 INFO L85 PathProgramCache]: Analyzing trace with hash -347149503, now seen corresponding path program 1 times [2023-11-29 00:46:55,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:46:55,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1820625759] [2023-11-29 00:46:55,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:46:55,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:46:55,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:46:56,024 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 00:46:56,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:46:56,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1820625759] [2023-11-29 00:46:56,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1820625759] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:46:56,025 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [923578538] [2023-11-29 00:46:56,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:46:56,025 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:46:56,025 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:46:56,028 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:46:56,034 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 00:46:56,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:46:56,094 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 00:46:56,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:46:56,182 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 00:46:56,352 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 00:46:56,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:46:56,558 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 00:46:56,558 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [923578538] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:46:56,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:46:56,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-29 00:46:56,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566285045] [2023-11-29 00:46:56,559 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:46:56,559 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:46:56,560 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:46:56,560 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:46:56,560 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=128, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:46:56,561 INFO L87 Difference]: Start difference. First operand 29 states and 35 transitions. Second operand has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:56,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:46:56,774 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2023-11-29 00:46:56,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 00:46:56,774 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-29 00:46:56,775 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:46:56,776 INFO L225 Difference]: With dead ends: 31 [2023-11-29 00:46:56,776 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 00:46:56,777 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:46:56,778 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 56 mSDsluCounter, 24 mSDsCounter, 0 mSdLazyCounter, 91 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 56 SdHoareTripleChecker+Valid, 38 SdHoareTripleChecker+Invalid, 95 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 91 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:46:56,778 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [56 Valid, 38 Invalid, 95 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 91 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:46:56,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 00:46:56,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 26. [2023-11-29 00:46:56,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 22 states have (on average 1.4090909090909092) 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 00:46:56,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-11-29 00:46:56,782 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 7 [2023-11-29 00:46:56,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:46:56,782 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-11-29 00:46:56,783 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6153846153846154) internal successors, (21), 13 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:56,783 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-11-29 00:46:56,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 00:46:56,783 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:46:56,783 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:46:56,791 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 00:46:56,984 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:46:56,984 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:46:56,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:46:56,985 INFO L85 PathProgramCache]: Analyzing trace with hash 955153746, now seen corresponding path program 1 times [2023-11-29 00:46:56,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:46:56,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1689919180] [2023-11-29 00:46:56,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:46:56,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:46:57,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:46:57,080 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 00:46:57,080 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:46:57,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1689919180] [2023-11-29 00:46:57,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1689919180] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:46:57,081 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:46:57,081 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 00:46:57,081 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007810155] [2023-11-29 00:46:57,081 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:46:57,082 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 00:46:57,082 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:46:57,082 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 00:46:57,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 00:46:57,083 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:57,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:46:57,102 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2023-11-29 00:46:57,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 00:46:57,103 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2023-11-29 00:46:57,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:46:57,103 INFO L225 Difference]: With dead ends: 25 [2023-11-29 00:46:57,103 INFO L226 Difference]: Without dead ends: 23 [2023-11-29 00:46:57,103 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 00:46:57,104 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 12 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 26 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:46:57,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 26 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:46:57,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-29 00:46:57,107 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-29 00:46:57,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 20 states have (on average 1.35) internal successors, (27), 22 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 00:46:57,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 27 transitions. [2023-11-29 00:46:57,108 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 27 transitions. Word has length 10 [2023-11-29 00:46:57,108 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:46:57,108 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 27 transitions. [2023-11-29 00:46:57,108 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.3333333333333335) internal successors, (10), 3 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:57,108 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 27 transitions. [2023-11-29 00:46:57,109 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 00:46:57,109 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:46:57,109 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:46:57,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 00:46:57,109 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:46:57,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:46:57,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1219276140, now seen corresponding path program 1 times [2023-11-29 00:46:57,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:46:57,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562294192] [2023-11-29 00:46:57,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:46:57,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:46:57,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:46:57,281 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 00:46:57,281 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:46:57,281 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562294192] [2023-11-29 00:46:57,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [562294192] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:46:57,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:46:57,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 00:46:57,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593491815] [2023-11-29 00:46:57,282 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:46:57,282 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 00:46:57,282 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:46:57,283 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 00:46:57,283 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 00:46:57,283 INFO L87 Difference]: Start difference. First operand 23 states and 27 transitions. Second operand has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:57,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:46:57,350 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2023-11-29 00:46:57,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-29 00:46:57,351 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2023-11-29 00:46:57,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:46:57,352 INFO L225 Difference]: With dead ends: 27 [2023-11-29 00:46:57,352 INFO L226 Difference]: Without dead ends: 21 [2023-11-29 00:46:57,352 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2023-11-29 00:46:57,353 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 3 mSDsluCounter, 38 mSDsCounter, 0 mSdLazyCounter, 44 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 44 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 44 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:46:57,353 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 50 Invalid, 44 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 44 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 00:46:57,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 21 states. [2023-11-29 00:46:57,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 21 to 21. [2023-11-29 00:46:57,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 20 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 00:46:57,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 24 transitions. [2023-11-29 00:46:57,356 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 24 transitions. Word has length 12 [2023-11-29 00:46:57,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:46:57,356 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 24 transitions. [2023-11-29 00:46:57,356 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 2.0) internal successors, (12), 6 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:57,356 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 24 transitions. [2023-11-29 00:46:57,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2023-11-29 00:46:57,357 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:46:57,357 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:46:57,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 00:46:57,357 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:46:57,358 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:46:57,358 INFO L85 PathProgramCache]: Analyzing trace with hash -518211562, now seen corresponding path program 1 times [2023-11-29 00:46:57,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:46:57,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103669753] [2023-11-29 00:46:57,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:46:57,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:46:57,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:46:57,553 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 00:46:57,553 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:46:57,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103669753] [2023-11-29 00:46:57,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [103669753] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 00:46:57,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 00:46:57,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 00:46:57,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209607549] [2023-11-29 00:46:57,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 00:46:57,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 00:46:57,555 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:46:57,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 00:46:57,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 00:46:57,555 INFO L87 Difference]: Start difference. First operand 21 states and 24 transitions. Second operand has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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 00:46:57,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:46:57,628 INFO L93 Difference]: Finished difference Result 27 states and 30 transitions. [2023-11-29 00:46:57,629 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 00:46:57,629 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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 00:46:57,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:46:57,629 INFO L225 Difference]: With dead ends: 27 [2023-11-29 00:46:57,629 INFO L226 Difference]: Without dead ends: 23 [2023-11-29 00:46:57,630 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2023-11-29 00:46:57,630 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 22 mSDsluCounter, 23 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 22 SdHoareTripleChecker+Valid, 33 SdHoareTripleChecker+Invalid, 41 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:46:57,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [22 Valid, 33 Invalid, 41 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:46:57,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-29 00:46:57,632 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 22. [2023-11-29 00:46:57,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:57,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-11-29 00:46:57,633 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 12 [2023-11-29 00:46:57,633 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:46:57,633 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-11-29 00:46:57,633 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 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 00:46:57,634 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-11-29 00:46:57,634 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-29 00:46:57,634 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:46:57,634 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:46:57,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 00:46:57,634 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:46:57,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:46:57,635 INFO L85 PathProgramCache]: Analyzing trace with hash -1369647777, now seen corresponding path program 1 times [2023-11-29 00:46:57,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:46:57,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [654043356] [2023-11-29 00:46:57,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:46:57,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:46:57,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:46:57,912 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 00:46:57,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:46:57,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [654043356] [2023-11-29 00:46:57,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [654043356] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:46:57,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [626482832] [2023-11-29 00:46:57,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:46:57,913 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:46:57,913 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:46:57,916 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:46:57,920 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 00:46:57,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:46:57,988 INFO L262 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 20 conjunts are in the unsatisfiable core [2023-11-29 00:46:57,990 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:46:58,085 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 00:46:58,086 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:46:58,180 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:46:58,205 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 00:46:58,205 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [626482832] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:46:58,206 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:46:58,206 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-29 00:46:58,206 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691176211] [2023-11-29 00:46:58,206 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:46:58,206 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 00:46:58,206 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:46:58,207 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 00:46:58,207 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-29 00:46:58,207 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 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 00:46:58,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:46:58,379 INFO L93 Difference]: Finished difference Result 28 states and 32 transitions. [2023-11-29 00:46:58,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 00:46:58,380 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 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) Word has length 14 [2023-11-29 00:46:58,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:46:58,380 INFO L225 Difference]: With dead ends: 28 [2023-11-29 00:46:58,380 INFO L226 Difference]: Without dead ends: 28 [2023-11-29 00:46:58,381 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 18 SyntacticMatches, 2 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2023-11-29 00:46:58,382 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 65 mSDsluCounter, 34 mSDsCounter, 0 mSdLazyCounter, 105 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 43 SdHoareTripleChecker+Invalid, 112 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 105 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:46:58,382 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 43 Invalid, 112 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 105 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:46:58,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-29 00:46:58,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 22. [2023-11-29 00:46:58,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 22 states, 21 states have (on average 1.1904761904761905) internal successors, (25), 21 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:46:58,384 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-11-29 00:46:58,384 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 14 [2023-11-29 00:46:58,384 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:46:58,385 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-11-29 00:46:58,385 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.4615384615384617) internal successors, (32), 14 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 00:46:58,385 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-11-29 00:46:58,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-29 00:46:58,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:46:58,385 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:46:58,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 00:46:58,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable11 [2023-11-29 00:46:58,586 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:46:58,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:46:58,587 INFO L85 PathProgramCache]: Analyzing trace with hash 75875654, now seen corresponding path program 2 times [2023-11-29 00:46:58,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:46:58,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [525219130] [2023-11-29 00:46:58,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:46:58,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:46:58,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:46:58,927 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 5 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:46:58,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:46:58,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [525219130] [2023-11-29 00:46:58,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [525219130] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:46:58,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [767204419] [2023-11-29 00:46:58,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:46:58,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:46:58,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:46:58,928 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:46:58,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 00:46:58,995 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:46:58,995 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:46:58,996 INFO L262 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 00:46:59,000 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:46:59,047 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-29 00:46:59,272 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:46:59,272 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-11-29 00:46:59,410 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:46:59,410 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:46:59,720 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:46:59,729 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-29 00:46:59,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:46:59,762 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:46:59,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [767204419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:46:59,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:46:59,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-29 00:46:59,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019204819] [2023-11-29 00:46:59,763 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:46:59,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 00:46:59,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:46:59,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 00:46:59,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=431, Unknown=0, NotChecked=0, Total=506 [2023-11-29 00:46:59,764 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 00:47:00,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:00,492 INFO L93 Difference]: Finished difference Result 47 states and 53 transitions. [2023-11-29 00:47:00,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 00:47:00,493 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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) Word has length 19 [2023-11-29 00:47:00,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:00,494 INFO L225 Difference]: With dead ends: 47 [2023-11-29 00:47:00,494 INFO L226 Difference]: Without dead ends: 37 [2023-11-29 00:47:00,495 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 2 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=230, Invalid=1252, Unknown=0, NotChecked=0, Total=1482 [2023-11-29 00:47:00,495 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 113 mSDsluCounter, 98 mSDsCounter, 0 mSdLazyCounter, 246 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 113 SdHoareTripleChecker+Valid, 110 SdHoareTripleChecker+Invalid, 263 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 246 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:00,496 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [113 Valid, 110 Invalid, 263 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 246 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:47:00,496 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 37 states. [2023-11-29 00:47:00,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 37 to 30. [2023-11-29 00:47:00,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.1724137931034482) internal successors, (34), 29 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:00,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 34 transitions. [2023-11-29 00:47:00,499 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 34 transitions. Word has length 19 [2023-11-29 00:47:00,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:00,499 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 34 transitions. [2023-11-29 00:47:00,500 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 2.0869565217391304) internal successors, (48), 23 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 00:47:00,500 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 34 transitions. [2023-11-29 00:47:00,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-29 00:47:00,501 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:00,501 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:00,506 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 00:47:00,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:00,704 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:47:00,705 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:00,705 INFO L85 PathProgramCache]: Analyzing trace with hash 1881351560, now seen corresponding path program 3 times [2023-11-29 00:47:00,705 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:00,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082044469] [2023-11-29 00:47:00,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:00,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:00,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:01,070 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:01,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:01,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082044469] [2023-11-29 00:47:01,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2082044469] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:01,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1380221278] [2023-11-29 00:47:01,071 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:47:01,071 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:01,072 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:01,073 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:01,075 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 00:47:01,160 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 00:47:01,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:47:01,162 INFO L262 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 34 conjunts are in the unsatisfiable core [2023-11-29 00:47:01,164 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:01,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:47:01,294 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:01,295 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:01,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:47:01,336 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:47:01,394 INFO L134 CoverageAnalysis]: Checked inductivity of 22 backedges. 9 proven. 13 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:01,395 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1380221278] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:47:01,395 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:47:01,395 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-11-29 00:47:01,395 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923603119] [2023-11-29 00:47:01,395 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:47:01,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 00:47:01,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:01,396 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 00:47:01,397 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-11-29 00:47:01,397 INFO L87 Difference]: Start difference. First operand 30 states and 34 transitions. Second operand has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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 00:47:01,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:01,612 INFO L93 Difference]: Finished difference Result 49 states and 55 transitions. [2023-11-29 00:47:01,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 00:47:01,613 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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) Word has length 26 [2023-11-29 00:47:01,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:01,613 INFO L225 Difference]: With dead ends: 49 [2023-11-29 00:47:01,613 INFO L226 Difference]: Without dead ends: 33 [2023-11-29 00:47:01,614 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 61 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=109, Invalid=541, Unknown=0, NotChecked=0, Total=650 [2023-11-29 00:47:01,615 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 41 mSDsluCounter, 77 mSDsCounter, 0 mSdLazyCounter, 178 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 87 SdHoareTripleChecker+Invalid, 183 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 178 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:01,615 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 87 Invalid, 183 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 178 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 00:47:01,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-29 00:47:01,617 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2023-11-29 00:47:01,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.1612903225806452) internal successors, (36), 31 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 00:47:01,618 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 36 transitions. [2023-11-29 00:47:01,618 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 36 transitions. Word has length 26 [2023-11-29 00:47:01,618 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:01,618 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 36 transitions. [2023-11-29 00:47:01,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.210526315789474) internal successors, (42), 19 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 00:47:01,619 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 36 transitions. [2023-11-29 00:47:01,619 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2023-11-29 00:47:01,619 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:01,620 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:01,625 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 00:47:01,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 00:47:01,826 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:47:01,826 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:01,826 INFO L85 PathProgramCache]: Analyzing trace with hash -2013409519, now seen corresponding path program 4 times [2023-11-29 00:47:01,826 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:01,827 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792900395] [2023-11-29 00:47:01,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:01,827 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:01,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:02,131 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 1 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:02,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:02,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792900395] [2023-11-29 00:47:02,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792900395] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:02,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1616371672] [2023-11-29 00:47:02,132 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:47:02,132 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:02,133 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:02,134 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:02,140 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 00:47:02,215 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:47:02,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:47:02,217 INFO L262 TraceCheckSpWp]: Trace formula consists of 157 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 00:47:02,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:02,226 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 00:47:02,372 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:02,373 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:02,638 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 4 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:02,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1616371672] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:47:02,638 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:47:02,639 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2023-11-29 00:47:02,639 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [721669397] [2023-11-29 00:47:02,639 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:47:02,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 00:47:02,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:02,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 00:47:02,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2023-11-29 00:47:02,641 INFO L87 Difference]: Start difference. First operand 32 states and 36 transitions. Second operand has 25 states, 24 states have (on average 2.875) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:02,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:02,905 INFO L93 Difference]: Finished difference Result 43 states and 49 transitions. [2023-11-29 00:47:02,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 00:47:02,906 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.875) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2023-11-29 00:47:02,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:02,907 INFO L225 Difference]: With dead ends: 43 [2023-11-29 00:47:02,907 INFO L226 Difference]: Without dead ends: 43 [2023-11-29 00:47:02,907 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2023-11-29 00:47:02,908 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 66 mSDsluCounter, 97 mSDsCounter, 0 mSdLazyCounter, 269 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 66 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 270 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 269 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:02,908 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [66 Valid, 113 Invalid, 270 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 269 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:47:02,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-29 00:47:02,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 38. [2023-11-29 00:47:02,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.162162162162162) internal successors, (43), 37 states have internal predecessors, (43), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:02,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 43 transitions. [2023-11-29 00:47:02,911 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 43 transitions. Word has length 28 [2023-11-29 00:47:02,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:02,912 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 43 transitions. [2023-11-29 00:47:02,912 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.875) internal successors, (69), 25 states have internal predecessors, (69), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:02,912 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 43 transitions. [2023-11-29 00:47:02,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-29 00:47:02,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:02,914 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:02,918 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 00:47:03,114 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 00:47:03,114 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:47:03,115 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:03,115 INFO L85 PathProgramCache]: Analyzing trace with hash 1163332308, now seen corresponding path program 5 times [2023-11-29 00:47:03,115 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:03,115 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816347242] [2023-11-29 00:47:03,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:03,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:03,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:03,439 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 13 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:03,439 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:03,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816347242] [2023-11-29 00:47:03,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816347242] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:03,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320688519] [2023-11-29 00:47:03,440 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:47:03,440 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:03,440 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:03,441 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:03,448 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 00:47:03,527 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 00:47:03,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:47:03,529 INFO L262 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 44 conjunts are in the unsatisfiable core [2023-11-29 00:47:03,532 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:03,538 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 00:47:03,660 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-29 00:47:04,022 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:47:04,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2023-11-29 00:47:04,139 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:04,140 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:04,542 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:47:04,549 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:47:04,941 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 4 proven. 39 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:04,941 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320688519] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:47:04,941 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:47:04,941 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 12, 12] total 35 [2023-11-29 00:47:04,942 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [104451958] [2023-11-29 00:47:04,942 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:47:04,942 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 00:47:04,942 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:04,943 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 00:47:04,943 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=1056, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 00:47:04,944 INFO L87 Difference]: Start difference. First operand 38 states and 43 transitions. Second operand has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:07,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:07,910 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2023-11-29 00:47:07,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-29 00:47:07,911 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 33 [2023-11-29 00:47:07,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:07,911 INFO L225 Difference]: With dead ends: 75 [2023-11-29 00:47:07,911 INFO L226 Difference]: Without dead ends: 53 [2023-11-29 00:47:07,913 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 95 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 399 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=350, Invalid=2406, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 00:47:07,914 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 198 mSDsluCounter, 247 mSDsCounter, 0 mSdLazyCounter, 545 mSolverCounterSat, 18 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 265 SdHoareTripleChecker+Invalid, 565 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 545 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:07,914 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 265 Invalid, 565 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 545 Invalid, 2 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 00:47:07,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2023-11-29 00:47:07,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 46. [2023-11-29 00:47:07,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 1.1555555555555554) internal successors, (52), 45 states have internal predecessors, (52), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:07,917 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 52 transitions. [2023-11-29 00:47:07,917 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 52 transitions. Word has length 33 [2023-11-29 00:47:07,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:07,918 INFO L495 AbstractCegarLoop]: Abstraction has 46 states and 52 transitions. [2023-11-29 00:47:07,918 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.7142857142857144) internal successors, (95), 35 states have internal predecessors, (95), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:07,918 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 52 transitions. [2023-11-29 00:47:07,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-29 00:47:07,919 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:07,919 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:07,924 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2023-11-29 00:47:08,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 00:47:08,120 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:47:08,121 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:08,121 INFO L85 PathProgramCache]: Analyzing trace with hash 915363066, now seen corresponding path program 6 times [2023-11-29 00:47:08,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:08,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167946379] [2023-11-29 00:47:08,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:08,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:08,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:08,515 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:08,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:08,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167946379] [2023-11-29 00:47:08,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1167946379] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:08,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394060565] [2023-11-29 00:47:08,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:47:08,516 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:08,516 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:08,516 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:08,519 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 00:47:08,613 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2023-11-29 00:47:08,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:47:08,615 INFO L262 TraceCheckSpWp]: Trace formula consists of 206 conjuncts, 46 conjunts are in the unsatisfiable core [2023-11-29 00:47:08,618 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:08,722 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:47:08,771 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:08,771 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:08,825 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:47:08,827 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:47:08,883 INFO L134 CoverageAnalysis]: Checked inductivity of 71 backedges. 17 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:08,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [394060565] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:47:08,883 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:47:08,883 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2023-11-29 00:47:08,883 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1871772986] [2023-11-29 00:47:08,884 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:47:08,884 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 00:47:08,884 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:08,884 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 00:47:08,885 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2023-11-29 00:47:08,885 INFO L87 Difference]: Start difference. First operand 46 states and 52 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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 00:47:09,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:09,231 INFO L93 Difference]: Finished difference Result 77 states and 87 transitions. [2023-11-29 00:47:09,231 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 00:47:09,232 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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) Word has length 40 [2023-11-29 00:47:09,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:09,232 INFO L225 Difference]: With dead ends: 77 [2023-11-29 00:47:09,232 INFO L226 Difference]: Without dead ends: 49 [2023-11-29 00:47:09,233 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 104 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=147, Invalid=1113, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 00:47:09,233 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 72 mSDsluCounter, 182 mSDsCounter, 0 mSdLazyCounter, 408 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 72 SdHoareTripleChecker+Valid, 198 SdHoareTripleChecker+Invalid, 417 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:09,234 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [72 Valid, 198 Invalid, 417 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 408 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:47:09,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2023-11-29 00:47:09,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 48. [2023-11-29 00:47:09,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.148936170212766) internal successors, (54), 47 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:09,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 54 transitions. [2023-11-29 00:47:09,237 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 54 transitions. Word has length 40 [2023-11-29 00:47:09,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:09,237 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 54 transitions. [2023-11-29 00:47:09,237 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.4) internal successors, (60), 25 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 00:47:09,237 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 54 transitions. [2023-11-29 00:47:09,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-29 00:47:09,238 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:09,239 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:09,245 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 00:47:09,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 00:47:09,444 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:47:09,445 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:09,445 INFO L85 PathProgramCache]: Analyzing trace with hash 2021268163, now seen corresponding path program 7 times [2023-11-29 00:47:09,445 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:09,445 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600573947] [2023-11-29 00:47:09,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:09,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:09,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:09,878 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 9 proven. 71 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:09,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:09,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600573947] [2023-11-29 00:47:09,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600573947] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:09,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1854791777] [2023-11-29 00:47:09,878 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:47:09,879 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:09,879 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:09,880 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:09,880 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 00:47:09,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:09,960 INFO L262 TraceCheckSpWp]: Trace formula consists of 219 conjuncts, 40 conjunts are in the unsatisfiable core [2023-11-29 00:47:09,962 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:10,179 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:10,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:10,389 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:47:10,480 INFO L134 CoverageAnalysis]: Checked inductivity of 80 backedges. 16 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:10,481 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1854791777] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:47:10,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:47:10,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 28 [2023-11-29 00:47:10,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [487998158] [2023-11-29 00:47:10,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:47:10,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 00:47:10,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:10,482 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 00:47:10,482 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2023-11-29 00:47:10,482 INFO L87 Difference]: Start difference. First operand 48 states and 54 transitions. Second operand has 29 states, 28 states have (on average 3.142857142857143) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:10,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:10,875 INFO L93 Difference]: Finished difference Result 59 states and 67 transitions. [2023-11-29 00:47:10,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 00:47:10,876 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 3.142857142857143) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 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 42 [2023-11-29 00:47:10,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:10,876 INFO L225 Difference]: With dead ends: 59 [2023-11-29 00:47:10,876 INFO L226 Difference]: Without dead ends: 59 [2023-11-29 00:47:10,877 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 103 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 419 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=1132, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 00:47:10,878 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 99 mSDsluCounter, 216 mSDsCounter, 0 mSdLazyCounter, 510 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 99 SdHoareTripleChecker+Valid, 237 SdHoareTripleChecker+Invalid, 511 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 510 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:10,878 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [99 Valid, 237 Invalid, 511 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 510 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 00:47:10,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 59 states. [2023-11-29 00:47:10,880 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 59 to 54. [2023-11-29 00:47:10,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.150943396226415) internal successors, (61), 53 states have internal predecessors, (61), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:10,881 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 61 transitions. [2023-11-29 00:47:10,881 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 61 transitions. Word has length 42 [2023-11-29 00:47:10,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:10,881 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 61 transitions. [2023-11-29 00:47:10,882 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 3.142857142857143) internal successors, (88), 29 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:10,882 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 61 transitions. [2023-11-29 00:47:10,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 00:47:10,883 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:10,883 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:10,889 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2023-11-29 00:47:11,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 00:47:11,084 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:47:11,085 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:11,085 INFO L85 PathProgramCache]: Analyzing trace with hash 1838169698, now seen corresponding path program 8 times [2023-11-29 00:47:11,085 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:11,085 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [653766618] [2023-11-29 00:47:11,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:11,085 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:11,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:11,711 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 21 proven. 85 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:11,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:11,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [653766618] [2023-11-29 00:47:11,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [653766618] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:11,712 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815241891] [2023-11-29 00:47:11,712 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:47:11,712 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:11,712 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:11,713 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:11,717 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 00:47:11,817 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:47:11,817 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:47:11,820 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 00:47:11,824 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:11,954 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-29 00:47:12,644 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:47:12,644 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-11-29 00:47:12,772 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:12,772 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:13,359 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:47:13,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 00:47:13,370 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-29 00:47:13,464 INFO L134 CoverageAnalysis]: Checked inductivity of 106 backedges. 16 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:13,464 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1815241891] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:47:13,464 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:47:13,465 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 43 [2023-11-29 00:47:13,465 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079569625] [2023-11-29 00:47:13,465 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:47:13,465 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 43 states [2023-11-29 00:47:13,465 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:13,466 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 43 interpolants. [2023-11-29 00:47:13,467 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=171, Invalid=1635, Unknown=0, NotChecked=0, Total=1806 [2023-11-29 00:47:13,467 INFO L87 Difference]: Start difference. First operand 54 states and 61 transitions. Second operand has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:16,679 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.51s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:47:17,202 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:17,202 INFO L93 Difference]: Finished difference Result 111 states and 126 transitions. [2023-11-29 00:47:17,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2023-11-29 00:47:17,203 INFO L78 Accepts]: Start accepts. Automaton has has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 states have internal predecessors, (124), 0 states have call successors, (0), 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 00:47:17,203 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:17,203 INFO L225 Difference]: With dead ends: 111 [2023-11-29 00:47:17,203 INFO L226 Difference]: Without dead ends: 77 [2023-11-29 00:47:17,205 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 136 GetRequests, 62 SyntacticMatches, 6 SemanticMatches, 68 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 900 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=524, Invalid=4306, Unknown=0, NotChecked=0, Total=4830 [2023-11-29 00:47:17,205 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 199 mSDsluCounter, 496 mSDsCounter, 0 mSdLazyCounter, 1103 mSolverCounterSat, 41 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 199 SdHoareTripleChecker+Valid, 520 SdHoareTripleChecker+Invalid, 1145 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 1103 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:17,205 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [199 Valid, 520 Invalid, 1145 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 1103 Invalid, 1 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 00:47:17,206 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2023-11-29 00:47:17,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2023-11-29 00:47:17,208 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 1.1475409836065573) internal successors, (70), 61 states have internal predecessors, (70), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:17,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 70 transitions. [2023-11-29 00:47:17,208 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 70 transitions. Word has length 47 [2023-11-29 00:47:17,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:17,208 INFO L495 AbstractCegarLoop]: Abstraction has 62 states and 70 transitions. [2023-11-29 00:47:17,208 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 43 states, 43 states have (on average 2.883720930232558) internal successors, (124), 43 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:17,208 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 70 transitions. [2023-11-29 00:47:17,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-29 00:47:17,209 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:17,209 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:17,213 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 00:47:17,409 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:17,409 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:47:17,410 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:17,410 INFO L85 PathProgramCache]: Analyzing trace with hash -889854356, now seen corresponding path program 9 times [2023-11-29 00:47:17,410 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:17,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971584598] [2023-11-29 00:47:17,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:17,410 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:17,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:18,117 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 25 proven. 123 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:18,117 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:18,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971584598] [2023-11-29 00:47:18,117 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971584598] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:18,117 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421427637] [2023-11-29 00:47:18,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:47:18,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:18,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:18,119 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:18,128 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 00:47:18,283 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2023-11-29 00:47:18,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:47:18,286 INFO L262 TraceCheckSpWp]: Trace formula consists of 268 conjuncts, 53 conjunts are in the unsatisfiable core [2023-11-29 00:47:18,290 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:18,300 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 00:47:18,721 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 13 [2023-11-29 00:47:32,778 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 84 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:32,778 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:33,635 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-11-29 00:47:33,639 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-29 00:47:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 148 backedges. 100 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:34,422 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [421427637] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:47:34,422 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:47:34,422 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 21, 21] total 57 [2023-11-29 00:47:34,422 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975271483] [2023-11-29 00:47:34,422 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:47:34,423 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-29 00:47:34,423 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:34,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-29 00:47:34,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=319, Invalid=2868, Unknown=5, NotChecked=0, Total=3192 [2023-11-29 00:47:34,425 INFO L87 Difference]: Start difference. First operand 62 states and 70 transitions. Second operand has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 57 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 00:47:37,822 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.02s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:47:41,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:41,946 INFO L93 Difference]: Finished difference Result 105 states and 119 transitions. [2023-11-29 00:47:41,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 00:47:41,946 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 57 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) Word has length 54 [2023-11-29 00:47:41,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:41,947 INFO L225 Difference]: With dead ends: 105 [2023-11-29 00:47:41,947 INFO L226 Difference]: Without dead ends: 65 [2023-11-29 00:47:41,949 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 144 GetRequests, 70 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 896 ImplicationChecksByTransitivity, 15.9s TimeCoverageRelationStatistics Valid=641, Invalid=5054, Unknown=5, NotChecked=0, Total=5700 [2023-11-29 00:47:41,950 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 292 mSDsluCounter, 535 mSDsCounter, 0 mSdLazyCounter, 1233 mSolverCounterSat, 26 mSolverCounterUnsat, 6 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 292 SdHoareTripleChecker+Valid, 557 SdHoareTripleChecker+Invalid, 1265 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 1233 IncrementalHoareTripleChecker+Invalid, 6 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:41,950 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [292 Valid, 557 Invalid, 1265 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 1233 Invalid, 6 Unknown, 0 Unchecked, 6.5s Time] [2023-11-29 00:47:41,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2023-11-29 00:47:41,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 64. [2023-11-29 00:47:41,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 1.1428571428571428) internal successors, (72), 63 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 00:47:41,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 72 transitions. [2023-11-29 00:47:41,952 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 72 transitions. Word has length 54 [2023-11-29 00:47:41,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:41,952 INFO L495 AbstractCegarLoop]: Abstraction has 64 states and 72 transitions. [2023-11-29 00:47:41,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 57 states have (on average 2.6666666666666665) internal successors, (152), 57 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 00:47:41,952 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 72 transitions. [2023-11-29 00:47:41,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-29 00:47:41,953 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:41,953 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 7, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:41,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 00:47:42,153 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:42,153 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:47:42,154 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:42,154 INFO L85 PathProgramCache]: Analyzing trace with hash -781559691, now seen corresponding path program 10 times [2023-11-29 00:47:42,154 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:42,154 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [114414774] [2023-11-29 00:47:42,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:42,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:42,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:42,635 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 25 proven. 136 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:42,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:42,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [114414774] [2023-11-29 00:47:42,636 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [114414774] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:42,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2013038630] [2023-11-29 00:47:42,636 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:47:42,636 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:42,636 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:42,637 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:42,638 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 00:47:42,729 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:47:42,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:47:42,731 INFO L262 TraceCheckSpWp]: Trace formula consists of 281 conjuncts, 51 conjunts are in the unsatisfiable core [2023-11-29 00:47:42,733 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:42,737 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 00:47:43,026 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 36 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:43,026 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:43,604 INFO L134 CoverageAnalysis]: Checked inductivity of 161 backedges. 36 proven. 125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:43,604 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2013038630] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:47:43,604 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:47:43,605 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 18, 18] total 44 [2023-11-29 00:47:43,605 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294032591] [2023-11-29 00:47:43,605 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:47:43,605 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 00:47:43,605 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:43,606 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 00:47:43,607 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=283, Invalid=1697, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 00:47:43,607 INFO L87 Difference]: Start difference. First operand 64 states and 72 transitions. Second operand has 45 states, 44 states have (on average 3.022727272727273) internal successors, (133), 45 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:44,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:44,180 INFO L93 Difference]: Finished difference Result 75 states and 85 transitions. [2023-11-29 00:47:44,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 00:47:44,181 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.022727272727273) internal successors, (133), 45 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-29 00:47:44,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:44,181 INFO L225 Difference]: With dead ends: 75 [2023-11-29 00:47:44,181 INFO L226 Difference]: Without dead ends: 75 [2023-11-29 00:47:44,183 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 137 GetRequests, 84 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 831 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=409, Invalid=2561, Unknown=0, NotChecked=0, Total=2970 [2023-11-29 00:47:44,183 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 181 mSDsluCounter, 335 mSDsCounter, 0 mSdLazyCounter, 782 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 181 SdHoareTripleChecker+Valid, 363 SdHoareTripleChecker+Invalid, 783 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 782 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:44,184 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [181 Valid, 363 Invalid, 783 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 782 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:47:44,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-29 00:47:44,185 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 70. [2023-11-29 00:47:44,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 1.144927536231884) internal successors, (79), 69 states have internal predecessors, (79), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:44,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 79 transitions. [2023-11-29 00:47:44,186 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 79 transitions. Word has length 56 [2023-11-29 00:47:44,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:44,186 INFO L495 AbstractCegarLoop]: Abstraction has 70 states and 79 transitions. [2023-11-29 00:47:44,186 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.022727272727273) internal successors, (133), 45 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:44,186 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 79 transitions. [2023-11-29 00:47:44,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 62 [2023-11-29 00:47:44,187 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:44,187 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:44,192 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 00:47:44,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:44,387 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:47:44,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:44,388 INFO L85 PathProgramCache]: Analyzing trace with hash 1912389616, now seen corresponding path program 11 times [2023-11-29 00:47:44,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:44,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609052299] [2023-11-29 00:47:44,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:44,388 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:44,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:45,059 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 29 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:45,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:45,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609052299] [2023-11-29 00:47:45,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [609052299] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:45,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [181265712] [2023-11-29 00:47:45,059 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:47:45,060 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:45,060 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:45,060 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:45,061 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 00:47:45,164 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2023-11-29 00:47:45,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:47:45,167 INFO L262 TraceCheckSpWp]: Trace formula consists of 299 conjuncts, 64 conjunts are in the unsatisfiable core [2023-11-29 00:47:45,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:45,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:47:45,418 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 29 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:45,419 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:45,479 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:47:45,481 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:47:45,565 INFO L134 CoverageAnalysis]: Checked inductivity of 197 backedges. 29 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:45,566 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [181265712] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:47:45,566 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:47:45,566 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 34 [2023-11-29 00:47:45,566 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [433605752] [2023-11-29 00:47:45,566 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:47:45,566 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 34 states [2023-11-29 00:47:45,566 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:45,567 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 34 interpolants. [2023-11-29 00:47:45,568 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=1032, Unknown=0, NotChecked=0, Total=1122 [2023-11-29 00:47:45,568 INFO L87 Difference]: Start difference. First operand 70 states and 79 transitions. Second operand has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:46,311 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:46,311 INFO L93 Difference]: Finished difference Result 119 states and 135 transitions. [2023-11-29 00:47:46,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 00:47:46,311 INFO L78 Accepts]: Start accepts. Automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 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 61 [2023-11-29 00:47:46,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:46,312 INFO L225 Difference]: With dead ends: 119 [2023-11-29 00:47:46,312 INFO L226 Difference]: Without dead ends: 73 [2023-11-29 00:47:46,313 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 158 GetRequests, 109 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=204, Invalid=2346, Unknown=0, NotChecked=0, Total=2550 [2023-11-29 00:47:46,313 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 64 mSDsluCounter, 483 mSDsCounter, 0 mSdLazyCounter, 1083 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 64 SdHoareTripleChecker+Valid, 508 SdHoareTripleChecker+Invalid, 1097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 1083 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:46,314 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [64 Valid, 508 Invalid, 1097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 1083 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 00:47:46,314 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2023-11-29 00:47:46,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 72. [2023-11-29 00:47:46,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.1408450704225352) internal successors, (81), 71 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 00:47:46,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 81 transitions. [2023-11-29 00:47:46,315 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 81 transitions. Word has length 61 [2023-11-29 00:47:46,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:46,316 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 81 transitions. [2023-11-29 00:47:46,316 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 34 states, 34 states have (on average 2.5588235294117645) internal successors, (87), 34 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:46,316 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 81 transitions. [2023-11-29 00:47:46,316 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 64 [2023-11-29 00:47:46,316 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:46,317 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:46,322 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 00:47:46,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2023-11-29 00:47:46,517 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:47:46,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:46,517 INFO L85 PathProgramCache]: Analyzing trace with hash -303128121, now seen corresponding path program 12 times [2023-11-29 00:47:46,518 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:46,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1552046480] [2023-11-29 00:47:46,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:46,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:46,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:47,013 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 36 proven. 176 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:47,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:47,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1552046480] [2023-11-29 00:47:47,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1552046480] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:47,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2096413817] [2023-11-29 00:47:47,013 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:47:47,013 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:47,013 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:47,014 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:47,015 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 00:47:47,163 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-29 00:47:47,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:47:47,166 INFO L262 TraceCheckSpWp]: Trace formula consists of 312 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 00:47:47,169 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:47,173 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 00:47:47,570 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 49 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:47,570 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:48,253 INFO L134 CoverageAnalysis]: Checked inductivity of 212 backedges. 49 proven. 163 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:48,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2096413817] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:47:48,253 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:47:48,253 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 57 [2023-11-29 00:47:48,253 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1535514018] [2023-11-29 00:47:48,254 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:47:48,254 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-29 00:47:48,254 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:48,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-29 00:47:48,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=505, Invalid=2801, Unknown=0, NotChecked=0, Total=3306 [2023-11-29 00:47:48,257 INFO L87 Difference]: Start difference. First operand 72 states and 81 transitions. Second operand has 58 states, 57 states have (on average 3.245614035087719) internal successors, (185), 58 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 00:47:48,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:48,807 INFO L93 Difference]: Finished difference Result 83 states and 94 transitions. [2023-11-29 00:47:48,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 00:47:48,808 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 57 states have (on average 3.245614035087719) internal successors, (185), 58 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 63 [2023-11-29 00:47:48,808 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:48,808 INFO L225 Difference]: With dead ends: 83 [2023-11-29 00:47:48,808 INFO L226 Difference]: Without dead ends: 83 [2023-11-29 00:47:48,810 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 154 GetRequests, 87 SyntacticMatches, 0 SemanticMatches, 67 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1480 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=707, Invalid=3985, Unknown=0, NotChecked=0, Total=4692 [2023-11-29 00:47:48,810 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 306 mSDsluCounter, 340 mSDsCounter, 0 mSdLazyCounter, 752 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 306 SdHoareTripleChecker+Valid, 371 SdHoareTripleChecker+Invalid, 753 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 752 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:48,811 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [306 Valid, 371 Invalid, 753 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 752 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 00:47:48,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2023-11-29 00:47:48,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 78. [2023-11-29 00:47:48,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.1428571428571428) internal successors, (88), 77 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:48,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 88 transitions. [2023-11-29 00:47:48,813 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 88 transitions. Word has length 63 [2023-11-29 00:47:48,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:48,814 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 88 transitions. [2023-11-29 00:47:48,814 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 57 states have (on average 3.245614035087719) internal successors, (185), 58 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 00:47:48,814 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 88 transitions. [2023-11-29 00:47:48,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 69 [2023-11-29 00:47:48,815 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:48,815 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:48,820 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 00:47:49,015 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 00:47:49,015 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:47:49,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:49,016 INFO L85 PathProgramCache]: Analyzing trace with hash -1515488802, now seen corresponding path program 13 times [2023-11-29 00:47:49,016 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:49,016 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [226498923] [2023-11-29 00:47:49,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:49,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:49,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:49,714 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 33 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:49,714 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:49,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [226498923] [2023-11-29 00:47:49,714 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [226498923] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:49,714 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1736568169] [2023-11-29 00:47:49,715 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:47:49,715 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:49,715 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:49,715 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:49,716 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 00:47:49,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:49,810 INFO L262 TraceCheckSpWp]: Trace formula consists of 330 conjuncts, 70 conjunts are in the unsatisfiable core [2023-11-29 00:47:49,812 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:50,053 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:47:50,126 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 33 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:50,126 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:50,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:47:50,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:47:50,270 INFO L134 CoverageAnalysis]: Checked inductivity of 253 backedges. 33 proven. 220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:50,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1736568169] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:47:50,270 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:47:50,271 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 37 [2023-11-29 00:47:50,271 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195285461] [2023-11-29 00:47:50,271 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:47:50,271 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 37 states [2023-11-29 00:47:50,271 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:50,272 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 37 interpolants. [2023-11-29 00:47:50,272 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=1235, Unknown=0, NotChecked=0, Total=1332 [2023-11-29 00:47:50,273 INFO L87 Difference]: Start difference. First operand 78 states and 88 transitions. Second operand has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 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 00:47:51,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:51,227 INFO L93 Difference]: Finished difference Result 133 states and 151 transitions. [2023-11-29 00:47:51,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2023-11-29 00:47:51,227 INFO L78 Accepts]: Start accepts. Automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 states have internal predecessors, (96), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 68 [2023-11-29 00:47:51,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:51,228 INFO L225 Difference]: With dead ends: 133 [2023-11-29 00:47:51,228 INFO L226 Difference]: Without dead ends: 81 [2023-11-29 00:47:51,229 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 176 GetRequests, 122 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=223, Invalid=2857, Unknown=0, NotChecked=0, Total=3080 [2023-11-29 00:47:51,230 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 130 mSDsluCounter, 595 mSDsCounter, 0 mSdLazyCounter, 1312 mSolverCounterSat, 16 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 623 SdHoareTripleChecker+Invalid, 1328 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 16 IncrementalHoareTripleChecker+Valid, 1312 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:51,230 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 623 Invalid, 1328 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [16 Valid, 1312 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 00:47:51,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-29 00:47:51,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2023-11-29 00:47:51,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.139240506329114) internal successors, (90), 79 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 00:47:51,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 90 transitions. [2023-11-29 00:47:51,232 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 90 transitions. Word has length 68 [2023-11-29 00:47:51,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:51,233 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 90 transitions. [2023-11-29 00:47:51,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 37 states, 37 states have (on average 2.5945945945945947) internal successors, (96), 37 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 00:47:51,233 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 90 transitions. [2023-11-29 00:47:51,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 71 [2023-11-29 00:47:51,233 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:51,233 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 9, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:51,238 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 00:47:51,434 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-29 00:47:51,434 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:47:51,434 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:51,434 INFO L85 PathProgramCache]: Analyzing trace with hash 791095335, now seen corresponding path program 14 times [2023-11-29 00:47:51,434 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:51,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [597899887] [2023-11-29 00:47:51,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:51,435 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:51,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 49 proven. 221 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:52,170 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:52,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [597899887] [2023-11-29 00:47:52,170 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [597899887] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:52,170 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910070995] [2023-11-29 00:47:52,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:47:52,170 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:52,171 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:52,171 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:52,174 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 00:47:52,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:47:52,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:47:52,299 INFO L262 TraceCheckSpWp]: Trace formula consists of 343 conjuncts, 60 conjunts are in the unsatisfiable core [2023-11-29 00:47:52,301 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 64 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:52,718 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:53,178 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:47:53,363 INFO L134 CoverageAnalysis]: Checked inductivity of 270 backedges. 64 proven. 206 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:53,363 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1910070995] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:47:53,363 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:47:53,363 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 22, 22] total 44 [2023-11-29 00:47:53,363 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105283551] [2023-11-29 00:47:53,363 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:47:53,364 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 45 states [2023-11-29 00:47:53,364 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:53,365 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 45 interpolants. [2023-11-29 00:47:53,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=270, Invalid=1710, Unknown=0, NotChecked=0, Total=1980 [2023-11-29 00:47:53,366 INFO L87 Difference]: Start difference. First operand 80 states and 90 transitions. Second operand has 45 states, 44 states have (on average 3.272727272727273) internal successors, (144), 45 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 00:47:54,162 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:54,163 INFO L93 Difference]: Finished difference Result 91 states and 103 transitions. [2023-11-29 00:47:54,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-29 00:47:54,163 INFO L78 Accepts]: Start accepts. Automaton has has 45 states, 44 states have (on average 3.272727272727273) internal successors, (144), 45 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) Word has length 70 [2023-11-29 00:47:54,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:54,164 INFO L225 Difference]: With dead ends: 91 [2023-11-29 00:47:54,164 INFO L226 Difference]: Without dead ends: 91 [2023-11-29 00:47:54,165 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 171 GetRequests, 106 SyntacticMatches, 10 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=414, Invalid=2778, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 00:47:54,165 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 280 mSDsluCounter, 461 mSDsCounter, 0 mSdLazyCounter, 1033 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 280 SdHoareTripleChecker+Valid, 494 SdHoareTripleChecker+Invalid, 1034 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1033 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:54,165 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [280 Valid, 494 Invalid, 1034 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1033 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:47:54,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2023-11-29 00:47:54,167 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 86. [2023-11-29 00:47:54,167 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 1.1411764705882352) internal successors, (97), 85 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:54,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 97 transitions. [2023-11-29 00:47:54,167 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 97 transitions. Word has length 70 [2023-11-29 00:47:54,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:54,168 INFO L495 AbstractCegarLoop]: Abstraction has 86 states and 97 transitions. [2023-11-29 00:47:54,168 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 45 states, 44 states have (on average 3.272727272727273) internal successors, (144), 45 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 00:47:54,168 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 97 transitions. [2023-11-29 00:47:54,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 76 [2023-11-29 00:47:54,169 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:54,169 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:54,174 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 00:47:54,369 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:54,369 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:47:54,370 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:54,370 INFO L85 PathProgramCache]: Analyzing trace with hash -1264062594, now seen corresponding path program 15 times [2023-11-29 00:47:54,370 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:54,370 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536903758] [2023-11-29 00:47:54,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:54,370 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:54,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 37 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:55,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:55,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536903758] [2023-11-29 00:47:55,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536903758] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:55,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378041903] [2023-11-29 00:47:55,162 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:47:55,162 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:55,162 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:55,163 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:55,165 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 00:47:55,361 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 00:47:55,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:47:55,364 INFO L262 TraceCheckSpWp]: Trace formula consists of 361 conjuncts, 74 conjunts are in the unsatisfiable core [2023-11-29 00:47:55,367 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:55,661 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:47:55,753 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 37 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:55,753 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:55,836 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:47:55,838 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:47:55,938 INFO L134 CoverageAnalysis]: Checked inductivity of 316 backedges. 37 proven. 279 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:55,938 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [378041903] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:47:55,938 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:47:55,938 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 40 [2023-11-29 00:47:55,938 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238496270] [2023-11-29 00:47:55,939 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:47:55,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 00:47:55,939 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:55,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 00:47:55,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 00:47:55,941 INFO L87 Difference]: Start difference. First operand 86 states and 97 transitions. Second operand has 40 states, 40 states have (on average 2.625) internal successors, (105), 40 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:57,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:47:57,108 INFO L93 Difference]: Finished difference Result 147 states and 167 transitions. [2023-11-29 00:47:57,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 00:47:57,108 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 40 states have internal predecessors, (105), 0 states have call successors, (0), 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 00:47:57,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:47:57,109 INFO L225 Difference]: With dead ends: 147 [2023-11-29 00:47:57,109 INFO L226 Difference]: Without dead ends: 89 [2023-11-29 00:47:57,110 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 194 GetRequests, 135 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=242, Invalid=3418, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 00:47:57,111 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 145 mSDsluCounter, 813 mSDsCounter, 0 mSdLazyCounter, 1767 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 844 SdHoareTripleChecker+Invalid, 1785 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 1767 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:47:57,111 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 844 Invalid, 1785 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 1767 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-29 00:47:57,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2023-11-29 00:47:57,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 88. [2023-11-29 00:47:57,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 1.1379310344827587) internal successors, (99), 87 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 00:47:57,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 99 transitions. [2023-11-29 00:47:57,114 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 99 transitions. Word has length 75 [2023-11-29 00:47:57,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:47:57,114 INFO L495 AbstractCegarLoop]: Abstraction has 88 states and 99 transitions. [2023-11-29 00:47:57,114 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.625) internal successors, (105), 40 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:47:57,114 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 99 transitions. [2023-11-29 00:47:57,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-29 00:47:57,115 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:47:57,115 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:47:57,120 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 00:47:57,315 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-29 00:47:57,316 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:47:57,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:47:57,316 INFO L85 PathProgramCache]: Analyzing trace with hash 1182944533, now seen corresponding path program 16 times [2023-11-29 00:47:57,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:47:57,316 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79027361] [2023-11-29 00:47:57,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:47:57,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:47:57,335 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:47:57,982 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 64 proven. 271 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:57,983 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:47:57,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79027361] [2023-11-29 00:47:57,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79027361] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:47:57,983 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299793238] [2023-11-29 00:47:57,983 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:47:57,983 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:47:57,983 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:47:57,984 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:47:57,985 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 00:47:58,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:47:58,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:47:58,127 INFO L262 TraceCheckSpWp]: Trace formula consists of 374 conjuncts, 66 conjunts are in the unsatisfiable core [2023-11-29 00:47:58,129 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:47:58,132 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 00:47:58,551 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 81 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:58,551 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:47:59,409 INFO L134 CoverageAnalysis]: Checked inductivity of 335 backedges. 81 proven. 254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:47:59,409 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1299793238] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:47:59,409 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:47:59,409 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 59 [2023-11-29 00:47:59,409 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881130849] [2023-11-29 00:47:59,409 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:47:59,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-29 00:47:59,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:47:59,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-29 00:47:59,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=3044, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 00:47:59,412 INFO L87 Difference]: Start difference. First operand 88 states and 99 transitions. Second operand has 60 states, 59 states have (on average 3.0677966101694913) internal successors, (181), 60 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:48:00,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:00,250 INFO L93 Difference]: Finished difference Result 99 states and 112 transitions. [2023-11-29 00:48:00,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 00:48:00,250 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 3.0677966101694913) internal successors, (181), 60 states have internal predecessors, (181), 0 states have call successors, (0), 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 00:48:00,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:00,251 INFO L225 Difference]: With dead ends: 99 [2023-11-29 00:48:00,251 INFO L226 Difference]: Without dead ends: 99 [2023-11-29 00:48:00,252 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 188 GetRequests, 117 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=682, Invalid=4574, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 00:48:00,253 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 269 mSDsluCounter, 518 mSDsCounter, 0 mSdLazyCounter, 1204 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 269 SdHoareTripleChecker+Valid, 555 SdHoareTripleChecker+Invalid, 1205 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1204 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:00,253 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [269 Valid, 555 Invalid, 1205 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1204 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-29 00:48:00,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-29 00:48:00,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 94. [2023-11-29 00:48:00,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 1.1397849462365592) internal successors, (106), 93 states have internal predecessors, (106), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:48:00,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 106 transitions. [2023-11-29 00:48:00,256 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 106 transitions. Word has length 77 [2023-11-29 00:48:00,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:00,256 INFO L495 AbstractCegarLoop]: Abstraction has 94 states and 106 transitions. [2023-11-29 00:48:00,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 3.0677966101694913) internal successors, (181), 60 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:48:00,256 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 106 transitions. [2023-11-29 00:48:00,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 83 [2023-11-29 00:48:00,257 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:00,257 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:00,262 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 00:48:00,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-29 00:48:00,458 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:48:00,458 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:00,458 INFO L85 PathProgramCache]: Analyzing trace with hash 46444368, now seen corresponding path program 17 times [2023-11-29 00:48:00,458 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:00,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1967078017] [2023-11-29 00:48:00,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:00,459 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:00,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:01,242 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 41 proven. 345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:01,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:01,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1967078017] [2023-11-29 00:48:01,243 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1967078017] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:48:01,243 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1412393947] [2023-11-29 00:48:01,243 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:48:01,243 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:01,243 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:01,244 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:01,244 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 00:48:01,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-11-29 00:48:01,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:48:01,417 INFO L262 TraceCheckSpWp]: Trace formula consists of 392 conjuncts, 79 conjunts are in the unsatisfiable core [2023-11-29 00:48:01,419 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:01,425 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 00:48:01,738 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-29 00:48:02,799 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:48:02,799 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2023-11-29 00:48:02,987 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 81 proven. 305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:02,987 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:48:04,068 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:48:04,071 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:48:05,391 INFO L134 CoverageAnalysis]: Checked inductivity of 386 backedges. 81 proven. 305 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:05,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1412393947] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:48:05,391 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:48:05,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 77 [2023-11-29 00:48:05,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470568049] [2023-11-29 00:48:05,391 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:48:05,392 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-11-29 00:48:05,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:05,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-11-29 00:48:05,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=5319, Unknown=0, NotChecked=0, Total=5852 [2023-11-29 00:48:05,394 INFO L87 Difference]: Start difference. First operand 94 states and 106 transitions. Second operand has 77 states, 77 states have (on average 3.142857142857143) internal successors, (242), 77 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:48:13,457 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:13,457 INFO L93 Difference]: Finished difference Result 173 states and 197 transitions. [2023-11-29 00:48:13,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 00:48:13,457 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 3.142857142857143) internal successors, (242), 77 states have internal predecessors, (242), 0 states have call successors, (0), 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 82 [2023-11-29 00:48:13,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:13,458 INFO L225 Difference]: With dead ends: 173 [2023-11-29 00:48:13,459 INFO L226 Difference]: Without dead ends: 109 [2023-11-29 00:48:13,460 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 221 GetRequests, 114 SyntacticMatches, 0 SemanticMatches, 107 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1955 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=1064, Invalid=10708, Unknown=0, NotChecked=0, Total=11772 [2023-11-29 00:48:13,460 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 321 mSDsluCounter, 1224 mSDsCounter, 0 mSdLazyCounter, 2631 mSolverCounterSat, 76 mSolverCounterUnsat, 4 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 1263 SdHoareTripleChecker+Invalid, 2711 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 76 IncrementalHoareTripleChecker+Valid, 2631 IncrementalHoareTripleChecker+Invalid, 4 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:13,461 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 1263 Invalid, 2711 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [76 Valid, 2631 Invalid, 4 Unknown, 0 Unchecked, 3.9s Time] [2023-11-29 00:48:13,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2023-11-29 00:48:13,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 102. [2023-11-29 00:48:13,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.1386138613861385) internal successors, (115), 101 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 00:48:13,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 115 transitions. [2023-11-29 00:48:13,464 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 115 transitions. Word has length 82 [2023-11-29 00:48:13,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:13,465 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 115 transitions. [2023-11-29 00:48:13,465 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 3.142857142857143) internal successors, (242), 77 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:48:13,465 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 115 transitions. [2023-11-29 00:48:13,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 00:48:13,466 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:13,466 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:13,471 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 00:48:13,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2023-11-29 00:48:13,666 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:48:13,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:13,667 INFO L85 PathProgramCache]: Analyzing trace with hash 584920332, now seen corresponding path program 18 times [2023-11-29 00:48:13,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:13,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586726813] [2023-11-29 00:48:13,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:13,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:13,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:14,568 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 45 proven. 418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:14,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:14,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586726813] [2023-11-29 00:48:14,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1586726813] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:48:14,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [14256292] [2023-11-29 00:48:14,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:48:14,569 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:14,569 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:14,569 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:14,570 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 00:48:14,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-11-29 00:48:14,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:48:14,901 INFO L262 TraceCheckSpWp]: Trace formula consists of 423 conjuncts, 88 conjunts are in the unsatisfiable core [2023-11-29 00:48:14,904 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:15,246 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:48:15,385 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 45 proven. 418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:15,386 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:48:15,461 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:48:15,463 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:48:15,584 INFO L134 CoverageAnalysis]: Checked inductivity of 463 backedges. 45 proven. 418 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:15,584 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [14256292] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:48:15,585 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:48:15,585 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 47 [2023-11-29 00:48:15,585 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586529992] [2023-11-29 00:48:15,585 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:48:15,585 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 47 states [2023-11-29 00:48:15,585 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:15,586 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 47 interpolants. [2023-11-29 00:48:15,586 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=2040, Unknown=0, NotChecked=0, Total=2162 [2023-11-29 00:48:15,586 INFO L87 Difference]: Start difference. First operand 102 states and 115 transitions. Second operand has 47 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 47 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 00:48:17,196 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:17,196 INFO L93 Difference]: Finished difference Result 175 states and 199 transitions. [2023-11-29 00:48:17,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 00:48:17,197 INFO L78 Accepts]: Start accepts. Automaton has has 47 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 47 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 89 [2023-11-29 00:48:17,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:17,197 INFO L225 Difference]: With dead ends: 175 [2023-11-29 00:48:17,197 INFO L226 Difference]: Without dead ends: 105 [2023-11-29 00:48:17,198 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 230 GetRequests, 160 SyntacticMatches, 0 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 526 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=285, Invalid=4827, Unknown=0, NotChecked=0, Total=5112 [2023-11-29 00:48:17,198 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 253 mSDsluCounter, 1229 mSDsCounter, 0 mSdLazyCounter, 2669 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 253 SdHoareTripleChecker+Valid, 1266 SdHoareTripleChecker+Invalid, 2691 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 2669 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:17,199 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [253 Valid, 1266 Invalid, 2691 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 2669 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 00:48:17,199 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-29 00:48:17,201 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2023-11-29 00:48:17,201 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.1359223300970873) internal successors, (117), 103 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 00:48:17,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 117 transitions. [2023-11-29 00:48:17,202 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 117 transitions. Word has length 89 [2023-11-29 00:48:17,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:17,202 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 117 transitions. [2023-11-29 00:48:17,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 47 states, 47 states have (on average 2.6595744680851063) internal successors, (125), 47 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 00:48:17,202 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 117 transitions. [2023-11-29 00:48:17,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-29 00:48:17,203 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:17,203 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:17,209 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 00:48:17,403 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2023-11-29 00:48:17,403 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:48:17,404 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:17,404 INFO L85 PathProgramCache]: Analyzing trace with hash 624719459, now seen corresponding path program 19 times [2023-11-29 00:48:17,404 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:17,404 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1116131034] [2023-11-29 00:48:17,404 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:17,404 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:17,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:18,402 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 100 proven. 386 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:18,402 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:18,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1116131034] [2023-11-29 00:48:18,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1116131034] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:48:18,403 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885832337] [2023-11-29 00:48:18,403 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:48:18,403 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:18,403 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:18,404 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:18,404 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 00:48:18,507 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:18,509 INFO L262 TraceCheckSpWp]: Trace formula consists of 436 conjuncts, 75 conjunts are in the unsatisfiable core [2023-11-29 00:48:18,511 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:19,012 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 121 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:19,012 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:48:19,627 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:48:19,913 INFO L134 CoverageAnalysis]: Checked inductivity of 486 backedges. 121 proven. 365 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:19,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [885832337] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:48:19,913 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:48:19,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 56 [2023-11-29 00:48:19,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [995641541] [2023-11-29 00:48:19,914 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:48:19,914 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-29 00:48:19,914 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:19,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-29 00:48:19,915 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=2769, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 00:48:19,915 INFO L87 Difference]: Start difference. First operand 104 states and 117 transitions. Second operand has 57 states, 56 states have (on average 3.3214285714285716) internal successors, (186), 57 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 00:48:21,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:21,176 INFO L93 Difference]: Finished difference Result 115 states and 130 transitions. [2023-11-29 00:48:21,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 00:48:21,176 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 3.3214285714285716) internal successors, (186), 57 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 91 [2023-11-29 00:48:21,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:21,177 INFO L225 Difference]: With dead ends: 115 [2023-11-29 00:48:21,177 INFO L226 Difference]: Without dead ends: 115 [2023-11-29 00:48:21,178 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 222 GetRequests, 139 SyntacticMatches, 13 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2071 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=627, Invalid=4485, Unknown=0, NotChecked=0, Total=5112 [2023-11-29 00:48:21,178 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 313 mSDsluCounter, 937 mSDsCounter, 0 mSdLazyCounter, 1929 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 979 SdHoareTripleChecker+Invalid, 1930 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1929 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:21,178 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 979 Invalid, 1930 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1929 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 00:48:21,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2023-11-29 00:48:21,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 110. [2023-11-29 00:48:21,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 110 states, 109 states have (on average 1.1376146788990826) internal successors, (124), 109 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:48:21,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 124 transitions. [2023-11-29 00:48:21,181 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 124 transitions. Word has length 91 [2023-11-29 00:48:21,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:21,181 INFO L495 AbstractCegarLoop]: Abstraction has 110 states and 124 transitions. [2023-11-29 00:48:21,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 3.3214285714285716) internal successors, (186), 57 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 00:48:21,181 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 124 transitions. [2023-11-29 00:48:21,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 97 [2023-11-29 00:48:21,182 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:21,182 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:21,187 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 00:48:21,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:21,382 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:48:21,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:21,383 INFO L85 PathProgramCache]: Analyzing trace with hash -1005181246, now seen corresponding path program 20 times [2023-11-29 00:48:21,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:21,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262610945] [2023-11-29 00:48:21,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:21,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:21,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:22,450 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 49 proven. 498 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:22,450 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:22,450 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262610945] [2023-11-29 00:48:22,451 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [262610945] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:48:22,451 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [821727798] [2023-11-29 00:48:22,451 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:48:22,451 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:22,451 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:22,452 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:22,452 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 00:48:22,576 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:48:22,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:48:22,579 INFO L262 TraceCheckSpWp]: Trace formula consists of 454 conjuncts, 84 conjunts are in the unsatisfiable core [2023-11-29 00:48:22,582 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:22,924 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-29 00:48:24,580 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:48:24,580 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-11-29 00:48:24,810 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 121 proven. 426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:24,811 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:48:26,324 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:48:26,328 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 00:48:26,334 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-29 00:48:26,712 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 121 proven. 426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:26,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [821727798] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:48:26,713 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:48:26,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 78 [2023-11-29 00:48:26,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745435657] [2023-11-29 00:48:26,713 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:48:26,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-11-29 00:48:26,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:26,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-11-29 00:48:26,715 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=5548, Unknown=0, NotChecked=0, Total=6006 [2023-11-29 00:48:26,715 INFO L87 Difference]: Start difference. First operand 110 states and 124 transitions. Second operand has 78 states, 78 states have (on average 3.2948717948717947) internal successors, (257), 78 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:48:32,955 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:48:38,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:38,822 INFO L93 Difference]: Finished difference Result 251 states and 287 transitions. [2023-11-29 00:48:38,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-29 00:48:38,823 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 3.2948717948717947) internal successors, (257), 78 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 96 [2023-11-29 00:48:38,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:38,823 INFO L225 Difference]: With dead ends: 251 [2023-11-29 00:48:38,823 INFO L226 Difference]: Without dead ends: 175 [2023-11-29 00:48:38,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 283 GetRequests, 132 SyntacticMatches, 13 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4246 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1980, Invalid=17480, Unknown=0, NotChecked=0, Total=19460 [2023-11-29 00:48:38,825 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 616 mSDsluCounter, 1626 mSDsCounter, 0 mSdLazyCounter, 3498 mSolverCounterSat, 131 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 616 SdHoareTripleChecker+Valid, 1671 SdHoareTripleChecker+Invalid, 3630 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 131 IncrementalHoareTripleChecker+Valid, 3498 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:38,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [616 Valid, 1671 Invalid, 3630 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [131 Valid, 3498 Invalid, 1 Unknown, 0 Unchecked, 6.7s Time] [2023-11-29 00:48:38,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2023-11-29 00:48:38,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 118. [2023-11-29 00:48:38,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 118 states, 117 states have (on average 1.1367521367521367) internal successors, (133), 117 states have internal predecessors, (133), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:48:38,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 133 transitions. [2023-11-29 00:48:38,828 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 133 transitions. Word has length 96 [2023-11-29 00:48:38,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:38,829 INFO L495 AbstractCegarLoop]: Abstraction has 118 states and 133 transitions. [2023-11-29 00:48:38,829 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 3.2948717948717947) internal successors, (257), 78 states have internal predecessors, (257), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:48:38,829 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 133 transitions. [2023-11-29 00:48:38,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-29 00:48:38,830 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:38,830 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:38,836 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 00:48:39,030 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 00:48:39,031 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:48:39,031 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:39,031 INFO L85 PathProgramCache]: Analyzing trace with hash 1395120282, now seen corresponding path program 21 times [2023-11-29 00:48:39,031 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:39,031 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1452334673] [2023-11-29 00:48:39,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:39,031 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:39,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:40,036 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 53 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:40,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:40,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1452334673] [2023-11-29 00:48:40,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1452334673] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:48:40,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [124554371] [2023-11-29 00:48:40,036 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:48:40,036 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:40,036 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:40,037 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:40,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 00:48:40,521 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-11-29 00:48:40,522 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:48:40,526 INFO L262 TraceCheckSpWp]: Trace formula consists of 485 conjuncts, 102 conjunts are in the unsatisfiable core [2023-11-29 00:48:40,529 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:40,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:48:41,143 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 53 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:41,143 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:48:41,230 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:48:41,231 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:48:41,349 INFO L134 CoverageAnalysis]: Checked inductivity of 638 backedges. 53 proven. 585 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:41,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [124554371] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:48:41,349 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:48:41,349 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 53 [2023-11-29 00:48:41,349 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486826726] [2023-11-29 00:48:41,349 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:48:41,350 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 00:48:41,350 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:41,350 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 00:48:41,351 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=2620, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 00:48:41,351 INFO L87 Difference]: Start difference. First operand 118 states and 133 transitions. Second operand has 53 states, 53 states have (on average 2.69811320754717) internal successors, (143), 53 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:48:43,248 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:43,248 INFO L93 Difference]: Finished difference Result 203 states and 231 transitions. [2023-11-29 00:48:43,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 00:48:43,248 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.69811320754717) internal successors, (143), 53 states have internal predecessors, (143), 0 states have call successors, (0), 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 103 [2023-11-29 00:48:43,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:43,249 INFO L225 Difference]: With dead ends: 203 [2023-11-29 00:48:43,249 INFO L226 Difference]: Without dead ends: 121 [2023-11-29 00:48:43,250 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 266 GetRequests, 186 SyntacticMatches, 0 SemanticMatches, 80 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=323, Invalid=6319, Unknown=0, NotChecked=0, Total=6642 [2023-11-29 00:48:43,250 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 391 mSDsluCounter, 1435 mSDsCounter, 0 mSdLazyCounter, 3068 mSolverCounterSat, 26 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 391 SdHoareTripleChecker+Valid, 1478 SdHoareTripleChecker+Invalid, 3094 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 26 IncrementalHoareTripleChecker+Valid, 3068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:43,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [391 Valid, 1478 Invalid, 3094 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [26 Valid, 3068 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 00:48:43,251 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2023-11-29 00:48:43,252 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 120. [2023-11-29 00:48:43,252 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.134453781512605) internal successors, (135), 119 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:48:43,253 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 135 transitions. [2023-11-29 00:48:43,253 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 135 transitions. Word has length 103 [2023-11-29 00:48:43,253 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:43,253 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 135 transitions. [2023-11-29 00:48:43,253 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.69811320754717) internal successors, (143), 53 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:48:43,253 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 135 transitions. [2023-11-29 00:48:43,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 106 [2023-11-29 00:48:43,254 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:43,254 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:43,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 00:48:43,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 00:48:43,455 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:48:43,455 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:43,455 INFO L85 PathProgramCache]: Analyzing trace with hash 1579449777, now seen corresponding path program 22 times [2023-11-29 00:48:43,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:43,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128616707] [2023-11-29 00:48:43,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:43,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:43,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 144 proven. 521 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:44,659 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:44,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128616707] [2023-11-29 00:48:44,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1128616707] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:48:44,659 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696016483] [2023-11-29 00:48:44,659 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:48:44,659 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:44,659 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:44,660 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:44,661 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 00:48:44,844 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:48:44,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:48:44,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 498 conjuncts, 86 conjunts are in the unsatisfiable core [2023-11-29 00:48:44,850 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:44,853 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 00:48:45,460 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 169 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:45,460 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:48:46,851 INFO L134 CoverageAnalysis]: Checked inductivity of 665 backedges. 169 proven. 496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:46,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696016483] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:48:46,851 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:48:46,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 79 [2023-11-29 00:48:46,852 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [949562012] [2023-11-29 00:48:46,852 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:48:46,852 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-11-29 00:48:46,852 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:46,853 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-11-29 00:48:46,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=878, Invalid=5442, Unknown=0, NotChecked=0, Total=6320 [2023-11-29 00:48:46,854 INFO L87 Difference]: Start difference. First operand 120 states and 135 transitions. Second operand has 80 states, 79 states have (on average 3.1012658227848102) internal successors, (245), 80 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 00:48:48,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:48:48,499 INFO L93 Difference]: Finished difference Result 131 states and 148 transitions. [2023-11-29 00:48:48,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 00:48:48,500 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 3.1012658227848102) internal successors, (245), 80 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 105 [2023-11-29 00:48:48,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:48:48,501 INFO L225 Difference]: With dead ends: 131 [2023-11-29 00:48:48,501 INFO L226 Difference]: Without dead ends: 131 [2023-11-29 00:48:48,502 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 256 GetRequests, 161 SyntacticMatches, 0 SemanticMatches, 95 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2994 ImplicationChecksByTransitivity, 2.7s TimeCoverageRelationStatistics Valid=1158, Invalid=8154, Unknown=0, NotChecked=0, Total=9312 [2023-11-29 00:48:48,503 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 424 mSDsluCounter, 958 mSDsCounter, 0 mSdLazyCounter, 2097 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 424 SdHoareTripleChecker+Valid, 1006 SdHoareTripleChecker+Invalid, 2098 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2097 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:48:48,503 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [424 Valid, 1006 Invalid, 2098 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2097 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:48:48,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2023-11-29 00:48:48,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 126. [2023-11-29 00:48:48,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.136) internal successors, (142), 125 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:48:48,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 142 transitions. [2023-11-29 00:48:48,506 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 142 transitions. Word has length 105 [2023-11-29 00:48:48,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:48:48,507 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 142 transitions. [2023-11-29 00:48:48,507 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 3.1012658227848102) internal successors, (245), 80 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 00:48:48,507 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 142 transitions. [2023-11-29 00:48:48,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 111 [2023-11-29 00:48:48,508 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:48:48,508 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:48:48,514 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 00:48:48,708 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:48,708 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:48:48,708 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:48:48,709 INFO L85 PathProgramCache]: Analyzing trace with hash 1395949620, now seen corresponding path program 23 times [2023-11-29 00:48:48,709 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:48:48,709 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501471276] [2023-11-29 00:48:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:48:48,709 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:48:48,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:48:49,949 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 57 proven. 679 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:49,949 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:48:49,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501471276] [2023-11-29 00:48:49,950 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1501471276] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:48:49,950 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [910951096] [2023-11-29 00:48:49,950 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:48:49,950 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:48:49,950 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:48:49,951 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:48:49,951 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 00:48:50,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-11-29 00:48:50,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:48:50,208 INFO L262 TraceCheckSpWp]: Trace formula consists of 516 conjuncts, 99 conjunts are in the unsatisfiable core [2023-11-29 00:48:50,212 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:48:50,216 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 00:48:50,752 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-29 00:48:52,402 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:48:52,402 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2023-11-29 00:48:52,587 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 169 proven. 567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:52,588 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:48:54,254 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:48:54,258 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:48:56,309 INFO L134 CoverageAnalysis]: Checked inductivity of 736 backedges. 169 proven. 567 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:48:56,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [910951096] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:48:56,309 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:48:56,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 101 [2023-11-29 00:48:56,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [691711992] [2023-11-29 00:48:56,310 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:48:56,310 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-29 00:48:56,310 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:48:56,312 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-29 00:48:56,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=9207, Unknown=0, NotChecked=0, Total=10100 [2023-11-29 00:48:56,313 INFO L87 Difference]: Start difference. First operand 126 states and 142 transitions. Second operand has 101 states, 101 states have (on average 3.227722772277228) internal successors, (326), 101 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:48:58,755 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.13s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:49:05,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:05,085 INFO L93 Difference]: Finished difference Result 229 states and 261 transitions. [2023-11-29 00:49:05,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-29 00:49:05,085 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 3.227722772277228) internal successors, (326), 101 states have internal predecessors, (326), 0 states have call successors, (0), 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 110 [2023-11-29 00:49:05,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:05,086 INFO L225 Difference]: With dead ends: 229 [2023-11-29 00:49:05,086 INFO L226 Difference]: Without dead ends: 141 [2023-11-29 00:49:05,087 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 293 GetRequests, 154 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3370 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=1648, Invalid=18092, Unknown=0, NotChecked=0, Total=19740 [2023-11-29 00:49:05,087 INFO L413 NwaCegarLoop]: 51 mSDtfsCounter, 587 mSDsluCounter, 1852 mSDsCounter, 0 mSdLazyCounter, 4044 mSolverCounterSat, 143 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 587 SdHoareTripleChecker+Valid, 1903 SdHoareTripleChecker+Invalid, 4189 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 143 IncrementalHoareTripleChecker+Valid, 4044 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:05,088 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [587 Valid, 1903 Invalid, 4189 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [143 Valid, 4044 Invalid, 2 Unknown, 0 Unchecked, 3.9s Time] [2023-11-29 00:49:05,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-29 00:49:05,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 134. [2023-11-29 00:49:05,090 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 134 states, 133 states have (on average 1.1353383458646618) internal successors, (151), 133 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:05,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 151 transitions. [2023-11-29 00:49:05,090 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 151 transitions. Word has length 110 [2023-11-29 00:49:05,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:05,090 INFO L495 AbstractCegarLoop]: Abstraction has 134 states and 151 transitions. [2023-11-29 00:49:05,090 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 3.227722772277228) internal successors, (326), 101 states have internal predecessors, (326), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:05,090 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 151 transitions. [2023-11-29 00:49:05,091 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 118 [2023-11-29 00:49:05,091 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:05,091 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:05,097 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 00:49:05,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:05,292 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:49:05,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:05,292 INFO L85 PathProgramCache]: Analyzing trace with hash -1554820568, now seen corresponding path program 24 times [2023-11-29 00:49:05,292 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:05,292 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1149160301] [2023-11-29 00:49:05,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:05,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:05,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:06,698 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 61 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:06,698 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:06,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1149160301] [2023-11-29 00:49:06,699 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1149160301] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:49:06,699 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [167093928] [2023-11-29 00:49:06,699 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:49:06,699 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:06,699 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:06,700 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:06,701 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 00:49:07,427 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-11-29 00:49:07,427 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:49:07,433 INFO L262 TraceCheckSpWp]: Trace formula consists of 547 conjuncts, 112 conjunts are in the unsatisfiable core [2023-11-29 00:49:07,436 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:08,037 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:49:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 61 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:08,168 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:49:08,266 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:49:08,268 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:49:08,377 INFO L134 CoverageAnalysis]: Checked inductivity of 841 backedges. 61 proven. 780 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:08,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [167093928] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:49:08,378 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:49:08,378 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 58 [2023-11-29 00:49:08,378 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801022380] [2023-11-29 00:49:08,378 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:49:08,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-29 00:49:08,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:08,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-29 00:49:08,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3160, Unknown=0, NotChecked=0, Total=3306 [2023-11-29 00:49:08,380 INFO L87 Difference]: Start difference. First operand 134 states and 151 transitions. Second operand has 58 states, 58 states have (on average 2.7413793103448274) internal successors, (159), 58 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:10,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:10,763 INFO L93 Difference]: Finished difference Result 231 states and 263 transitions. [2023-11-29 00:49:10,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-29 00:49:10,763 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.7413793103448274) internal successors, (159), 58 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 117 [2023-11-29 00:49:10,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:10,764 INFO L225 Difference]: With dead ends: 231 [2023-11-29 00:49:10,764 INFO L226 Difference]: Without dead ends: 137 [2023-11-29 00:49:10,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 213 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=356, Invalid=7834, Unknown=0, NotChecked=0, Total=8190 [2023-11-29 00:49:10,765 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 235 mSDsluCounter, 1848 mSDsCounter, 0 mSdLazyCounter, 3948 mSolverCounterSat, 30 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 1897 SdHoareTripleChecker+Invalid, 3978 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 30 IncrementalHoareTripleChecker+Valid, 3948 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:10,766 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 1897 Invalid, 3978 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [30 Valid, 3948 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 00:49:10,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2023-11-29 00:49:10,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 136. [2023-11-29 00:49:10,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 136 states, 135 states have (on average 1.1333333333333333) internal successors, (153), 135 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 00:49:10,769 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 153 transitions. [2023-11-29 00:49:10,769 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 153 transitions. Word has length 117 [2023-11-29 00:49:10,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:10,769 INFO L495 AbstractCegarLoop]: Abstraction has 136 states and 153 transitions. [2023-11-29 00:49:10,770 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.7413793103448274) internal successors, (159), 58 states have internal predecessors, (159), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:10,770 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 153 transitions. [2023-11-29 00:49:10,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-29 00:49:10,770 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:10,770 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:10,776 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 00:49:10,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:10,971 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:49:10,971 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:10,971 INFO L85 PathProgramCache]: Analyzing trace with hash 1132577535, now seen corresponding path program 25 times [2023-11-29 00:49:10,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:10,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487202131] [2023-11-29 00:49:10,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:10,972 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:11,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:12,446 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 196 proven. 676 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:12,447 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:12,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487202131] [2023-11-29 00:49:12,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1487202131] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:49:12,447 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926403499] [2023-11-29 00:49:12,447 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:49:12,447 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:12,447 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:12,448 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:12,449 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 00:49:12,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:12,613 INFO L262 TraceCheckSpWp]: Trace formula consists of 560 conjuncts, 95 conjunts are in the unsatisfiable core [2023-11-29 00:49:12,616 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:13,371 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 225 proven. 647 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:13,371 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:49:14,335 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:49:14,791 INFO L134 CoverageAnalysis]: Checked inductivity of 872 backedges. 225 proven. 647 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:14,791 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1926403499] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:49:14,791 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:49:14,791 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 36] total 72 [2023-11-29 00:49:14,792 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [488891628] [2023-11-29 00:49:14,792 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:49:14,792 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-11-29 00:49:14,792 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:14,793 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-11-29 00:49:14,793 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=4573, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 00:49:14,793 INFO L87 Difference]: Start difference. First operand 136 states and 153 transitions. Second operand has 73 states, 72 states have (on average 3.361111111111111) internal successors, (242), 73 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:16,559 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:16,559 INFO L93 Difference]: Finished difference Result 147 states and 166 transitions. [2023-11-29 00:49:16,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 00:49:16,560 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 3.361111111111111) internal successors, (242), 73 states have internal predecessors, (242), 0 states have call successors, (0), 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 00:49:16,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:16,561 INFO L225 Difference]: With dead ends: 147 [2023-11-29 00:49:16,561 INFO L226 Difference]: Without dead ends: 147 [2023-11-29 00:49:16,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 290 GetRequests, 183 SyntacticMatches, 17 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3565 ImplicationChecksByTransitivity, 3.0s TimeCoverageRelationStatistics Valid=981, Invalid=7391, Unknown=0, NotChecked=0, Total=8372 [2023-11-29 00:49:16,562 INFO L413 NwaCegarLoop]: 54 mSDtfsCounter, 349 mSDsluCounter, 1133 mSDsCounter, 0 mSdLazyCounter, 2586 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 349 SdHoareTripleChecker+Valid, 1187 SdHoareTripleChecker+Invalid, 2587 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2586 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:16,562 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [349 Valid, 1187 Invalid, 2587 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2586 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 00:49:16,562 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-29 00:49:16,564 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 142. [2023-11-29 00:49:16,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 142 states, 141 states have (on average 1.1347517730496455) internal successors, (160), 141 states have internal predecessors, (160), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:16,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 160 transitions. [2023-11-29 00:49:16,564 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 160 transitions. Word has length 119 [2023-11-29 00:49:16,565 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:16,565 INFO L495 AbstractCegarLoop]: Abstraction has 142 states and 160 transitions. [2023-11-29 00:49:16,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 3.361111111111111) internal successors, (242), 73 states have internal predecessors, (242), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:16,565 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 160 transitions. [2023-11-29 00:49:16,565 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 125 [2023-11-29 00:49:16,565 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:16,565 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:16,570 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Ended with exit code 0 [2023-11-29 00:49:16,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:16,766 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:49:16,766 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:16,766 INFO L85 PathProgramCache]: Analyzing trace with hash -2089526362, now seen corresponding path program 26 times [2023-11-29 00:49:16,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:16,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803846867] [2023-11-29 00:49:16,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:16,767 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:16,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:18,303 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 65 proven. 888 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:18,303 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:18,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803846867] [2023-11-29 00:49:18,303 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803846867] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:49:18,303 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022612061] [2023-11-29 00:49:18,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:49:18,304 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:18,304 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:18,304 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:18,305 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 00:49:18,468 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:49:18,468 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:49:18,472 INFO L262 TraceCheckSpWp]: Trace formula consists of 578 conjuncts, 104 conjunts are in the unsatisfiable core [2023-11-29 00:49:18,475 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:19,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-29 00:49:21,409 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:49:21,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-11-29 00:49:21,650 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 225 proven. 728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:21,650 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:49:23,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:49:23,943 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 00:49:23,948 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-29 00:49:24,478 INFO L134 CoverageAnalysis]: Checked inductivity of 953 backedges. 225 proven. 728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:24,478 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1022612061] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:49:24,478 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:49:24,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 98 [2023-11-29 00:49:24,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048941882] [2023-11-29 00:49:24,479 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:49:24,479 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-11-29 00:49:24,479 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:24,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-11-29 00:49:24,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=8818, Unknown=0, NotChecked=0, Total=9506 [2023-11-29 00:49:24,481 INFO L87 Difference]: Start difference. First operand 142 states and 160 transitions. Second operand has 98 states, 98 states have (on average 3.3979591836734695) internal successors, (333), 98 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 00:49:30,190 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.09s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:49:36,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:36,816 INFO L93 Difference]: Finished difference Result 257 states and 293 transitions. [2023-11-29 00:49:36,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-29 00:49:36,817 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 3.3979591836734695) internal successors, (333), 98 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 124 [2023-11-29 00:49:36,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:36,818 INFO L225 Difference]: With dead ends: 257 [2023-11-29 00:49:36,818 INFO L226 Difference]: Without dead ends: 157 [2023-11-29 00:49:36,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 330 GetRequests, 172 SyntacticMatches, 17 SemanticMatches, 141 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4158 ImplicationChecksByTransitivity, 13.4s TimeCoverageRelationStatistics Valid=1470, Invalid=18836, Unknown=0, NotChecked=0, Total=20306 [2023-11-29 00:49:36,819 INFO L413 NwaCegarLoop]: 57 mSDtfsCounter, 533 mSDsluCounter, 2292 mSDsCounter, 0 mSdLazyCounter, 4998 mSolverCounterSat, 194 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 533 SdHoareTripleChecker+Valid, 2349 SdHoareTripleChecker+Invalid, 5193 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 194 IncrementalHoareTripleChecker+Valid, 4998 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:36,820 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [533 Valid, 2349 Invalid, 5193 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [194 Valid, 4998 Invalid, 1 Unknown, 0 Unchecked, 4.0s Time] [2023-11-29 00:49:36,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2023-11-29 00:49:36,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 150. [2023-11-29 00:49:36,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.1342281879194631) internal successors, (169), 149 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:36,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 169 transitions. [2023-11-29 00:49:36,823 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 169 transitions. Word has length 124 [2023-11-29 00:49:36,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:36,824 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 169 transitions. [2023-11-29 00:49:36,824 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 3.3979591836734695) internal successors, (333), 98 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 00:49:36,824 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 169 transitions. [2023-11-29 00:49:36,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-29 00:49:36,825 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:36,825 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:36,830 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 00:49:37,025 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 00:49:37,026 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:49:37,026 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:37,026 INFO L85 PathProgramCache]: Analyzing trace with hash 1449851318, now seen corresponding path program 27 times [2023-11-29 00:49:37,026 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:37,026 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1645857487] [2023-11-29 00:49:37,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:37,026 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:37,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:38,528 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 69 proven. 1003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:38,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:38,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1645857487] [2023-11-29 00:49:38,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1645857487] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:49:38,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1318884795] [2023-11-29 00:49:38,529 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:49:38,529 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:38,529 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:38,530 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:38,530 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 00:49:39,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2023-11-29 00:49:39,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:49:39,612 INFO L262 TraceCheckSpWp]: Trace formula consists of 609 conjuncts, 124 conjunts are in the unsatisfiable core [2023-11-29 00:49:39,615 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:40,296 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:49:40,441 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 69 proven. 1003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:40,441 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:49:40,551 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:49:40,553 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:49:40,689 INFO L134 CoverageAnalysis]: Checked inductivity of 1072 backedges. 69 proven. 1003 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:40,689 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1318884795] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:49:40,690 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:49:40,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 64 [2023-11-29 00:49:40,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586088797] [2023-11-29 00:49:40,690 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:49:40,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 64 states [2023-11-29 00:49:40,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:40,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 64 interpolants. [2023-11-29 00:49:40,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=3872, Unknown=0, NotChecked=0, Total=4032 [2023-11-29 00:49:40,692 INFO L87 Difference]: Start difference. First operand 150 states and 169 transitions. Second operand has 64 states, 64 states have (on average 2.765625) internal successors, (177), 64 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:43,527 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:43,527 INFO L93 Difference]: Finished difference Result 259 states and 295 transitions. [2023-11-29 00:49:43,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-29 00:49:43,527 INFO L78 Accepts]: Start accepts. Automaton has has 64 states, 64 states have (on average 2.765625) internal successors, (177), 64 states have internal predecessors, (177), 0 states have call successors, (0), 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 00:49:43,528 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:43,528 INFO L225 Difference]: With dead ends: 259 [2023-11-29 00:49:43,528 INFO L226 Difference]: Without dead ends: 153 [2023-11-29 00:49:43,529 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 338 GetRequests, 239 SyntacticMatches, 0 SemanticMatches, 99 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 991 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=394, Invalid=9706, Unknown=0, NotChecked=0, Total=10100 [2023-11-29 00:49:43,529 INFO L413 NwaCegarLoop]: 55 mSDtfsCounter, 143 mSDsluCounter, 2360 mSDsCounter, 0 mSdLazyCounter, 5001 mSolverCounterSat, 35 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 143 SdHoareTripleChecker+Valid, 2415 SdHoareTripleChecker+Invalid, 5036 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 35 IncrementalHoareTripleChecker+Valid, 5001 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:43,529 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [143 Valid, 2415 Invalid, 5036 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [35 Valid, 5001 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 00:49:43,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-11-29 00:49:43,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2023-11-29 00:49:43,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.1324503311258278) internal successors, (171), 151 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:43,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 171 transitions. [2023-11-29 00:49:43,533 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 171 transitions. Word has length 131 [2023-11-29 00:49:43,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:43,533 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 171 transitions. [2023-11-29 00:49:43,533 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 64 states, 64 states have (on average 2.765625) internal successors, (177), 64 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:43,533 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 171 transitions. [2023-11-29 00:49:43,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 134 [2023-11-29 00:49:43,534 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:43,534 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:43,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 00:49:43,735 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 00:49:43,735 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:49:43,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:43,735 INFO L85 PathProgramCache]: Analyzing trace with hash -2082757043, now seen corresponding path program 28 times [2023-11-29 00:49:43,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:43,735 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [842799984] [2023-11-29 00:49:43,735 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:43,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:43,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:45,580 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 256 proven. 851 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:45,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:45,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [842799984] [2023-11-29 00:49:45,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [842799984] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:49:45,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398742419] [2023-11-29 00:49:45,580 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:49:45,581 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:45,581 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:45,581 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:45,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 00:49:45,823 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:49:45,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:49:45,828 INFO L262 TraceCheckSpWp]: Trace formula consists of 622 conjuncts, 110 conjunts are in the unsatisfiable core [2023-11-29 00:49:45,831 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:45,837 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 00:49:46,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 289 proven. 818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:46,821 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:49:49,225 INFO L134 CoverageAnalysis]: Checked inductivity of 1107 backedges. 289 proven. 818 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:49,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [398742419] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:49:49,225 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:49:49,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 97 [2023-11-29 00:49:49,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [175037872] [2023-11-29 00:49:49,225 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:49:49,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-11-29 00:49:49,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:49,227 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-11-29 00:49:49,228 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1361, Invalid=8145, Unknown=0, NotChecked=0, Total=9506 [2023-11-29 00:49:49,228 INFO L87 Difference]: Start difference. First operand 152 states and 171 transitions. Second operand has 98 states, 97 states have (on average 3.185567010309278) internal successors, (309), 98 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:51,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:51,678 INFO L93 Difference]: Finished difference Result 163 states and 184 transitions. [2023-11-29 00:49:51,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-29 00:49:51,678 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 3.185567010309278) internal successors, (309), 98 states have internal predecessors, (309), 0 states have call successors, (0), 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 133 [2023-11-29 00:49:51,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:51,679 INFO L225 Difference]: With dead ends: 163 [2023-11-29 00:49:51,679 INFO L226 Difference]: Without dead ends: 163 [2023-11-29 00:49:51,680 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 325 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4617 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=2153, Invalid=12127, Unknown=0, NotChecked=0, Total=14280 [2023-11-29 00:49:51,680 INFO L413 NwaCegarLoop]: 60 mSDtfsCounter, 1569 mSDsluCounter, 1432 mSDsCounter, 0 mSdLazyCounter, 3090 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1569 SdHoareTripleChecker+Valid, 1492 SdHoareTripleChecker+Invalid, 3097 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 3090 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:51,680 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1569 Valid, 1492 Invalid, 3097 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 3090 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 00:49:51,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2023-11-29 00:49:51,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 158. [2023-11-29 00:49:51,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 158 states, 157 states have (on average 1.1337579617834395) internal successors, (178), 157 states have internal predecessors, (178), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:51,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 178 transitions. [2023-11-29 00:49:51,684 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 178 transitions. Word has length 133 [2023-11-29 00:49:51,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:51,684 INFO L495 AbstractCegarLoop]: Abstraction has 158 states and 178 transitions. [2023-11-29 00:49:51,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 97 states have (on average 3.185567010309278) internal successors, (309), 98 states have internal predecessors, (309), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:51,684 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 178 transitions. [2023-11-29 00:49:51,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 139 [2023-11-29 00:49:51,685 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:51,685 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:51,692 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Ended with exit code 0 [2023-11-29 00:49:51,885 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 00:49:51,885 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:49:51,886 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:51,886 INFO L85 PathProgramCache]: Analyzing trace with hash 1944738072, now seen corresponding path program 29 times [2023-11-29 00:49:51,886 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:51,886 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1713678246] [2023-11-29 00:49:51,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:51,886 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:51,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:49:53,601 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 73 proven. 1125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:53,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:49:53,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1713678246] [2023-11-29 00:49:53,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1713678246] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:49:53,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110320594] [2023-11-29 00:49:53,601 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:49:53,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:49:53,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:49:53,602 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:49:53,603 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 00:49:54,039 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-11-29 00:49:54,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:49:54,045 INFO L262 TraceCheckSpWp]: Trace formula consists of 640 conjuncts, 130 conjunts are in the unsatisfiable core [2023-11-29 00:49:54,049 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:49:54,826 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:49:54,990 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 73 proven. 1125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:54,990 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:49:55,118 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:49:55,119 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:49:55,255 INFO L134 CoverageAnalysis]: Checked inductivity of 1198 backedges. 73 proven. 1125 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:49:55,255 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [110320594] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:49:55,255 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:49:55,255 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 43, 43] total 67 [2023-11-29 00:49:55,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1474265277] [2023-11-29 00:49:55,255 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:49:55,256 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 67 states [2023-11-29 00:49:55,256 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:49:55,256 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 67 interpolants. [2023-11-29 00:49:55,257 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=167, Invalid=4255, Unknown=0, NotChecked=0, Total=4422 [2023-11-29 00:49:55,257 INFO L87 Difference]: Start difference. First operand 158 states and 178 transitions. Second operand has 67 states, 67 states have (on average 2.7761194029850746) internal successors, (186), 67 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 00:49:58,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:49:58,536 INFO L93 Difference]: Finished difference Result 273 states and 311 transitions. [2023-11-29 00:49:58,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-29 00:49:58,536 INFO L78 Accepts]: Start accepts. Automaton has has 67 states, 67 states have (on average 2.7761194029850746) internal successors, (186), 67 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 138 [2023-11-29 00:49:58,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:49:58,538 INFO L225 Difference]: With dead ends: 273 [2023-11-29 00:49:58,538 INFO L226 Difference]: Without dead ends: 161 [2023-11-29 00:49:58,538 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 356 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 104 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1093 ImplicationChecksByTransitivity, 2.9s TimeCoverageRelationStatistics Valid=413, Invalid=10717, Unknown=0, NotChecked=0, Total=11130 [2023-11-29 00:49:58,539 INFO L413 NwaCegarLoop]: 58 mSDtfsCounter, 150 mSDsluCounter, 2494 mSDsCounter, 0 mSdLazyCounter, 5301 mSolverCounterSat, 36 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 2552 SdHoareTripleChecker+Invalid, 5337 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 36 IncrementalHoareTripleChecker+Valid, 5301 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:49:58,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 2552 Invalid, 5337 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [36 Valid, 5301 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 00:49:58,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2023-11-29 00:49:58,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 160. [2023-11-29 00:49:58,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 160 states, 159 states have (on average 1.1320754716981132) internal successors, (180), 159 states have internal predecessors, (180), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:49:58,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 180 transitions. [2023-11-29 00:49:58,542 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 180 transitions. Word has length 138 [2023-11-29 00:49:58,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:49:58,543 INFO L495 AbstractCegarLoop]: Abstraction has 160 states and 180 transitions. [2023-11-29 00:49:58,543 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 67 states, 67 states have (on average 2.7761194029850746) internal successors, (186), 67 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 00:49:58,543 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 180 transitions. [2023-11-29 00:49:58,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 141 [2023-11-29 00:49:58,543 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:49:58,544 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 19, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:49:58,550 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Ended with exit code 0 [2023-11-29 00:49:58,744 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 00:49:58,744 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:49:58,744 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:49:58,745 INFO L85 PathProgramCache]: Analyzing trace with hash -663640927, now seen corresponding path program 30 times [2023-11-29 00:49:58,745 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:49:58,745 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136741800] [2023-11-29 00:49:58,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:49:58,745 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:49:58,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:50:00,546 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 289 proven. 946 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:00,546 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:50:00,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136741800] [2023-11-29 00:50:00,546 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1136741800] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:50:00,546 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073004234] [2023-11-29 00:50:00,546 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:50:00,546 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:50:00,547 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:50:00,547 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:50:00,548 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 00:50:01,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 20 check-sat command(s) [2023-11-29 00:50:01,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:50:01,661 INFO L262 TraceCheckSpWp]: Trace formula consists of 653 conjuncts, 93 conjunts are in the unsatisfiable core [2023-11-29 00:50:01,664 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:50:01,668 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 00:50:03,274 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 324 proven. 911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:03,274 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:50:05,887 INFO L134 CoverageAnalysis]: Checked inductivity of 1235 backedges. 324 proven. 911 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:05,887 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2073004234] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:50:05,887 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:50:05,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 42, 42] total 123 [2023-11-29 00:50:05,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709790978] [2023-11-29 00:50:05,888 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:50:05,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2023-11-29 00:50:05,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:50:05,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2023-11-29 00:50:05,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2309, Invalid=12943, Unknown=0, NotChecked=0, Total=15252 [2023-11-29 00:50:05,891 INFO L87 Difference]: Start difference. First operand 160 states and 180 transitions. Second operand has 124 states, 123 states have (on average 3.3821138211382116) internal successors, (416), 124 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:08,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:50:08,001 INFO L93 Difference]: Finished difference Result 171 states and 193 transitions. [2023-11-29 00:50:08,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2023-11-29 00:50:08,002 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 123 states have (on average 3.3821138211382116) internal successors, (416), 124 states have internal predecessors, (416), 0 states have call successors, (0), 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 140 [2023-11-29 00:50:08,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:50:08,003 INFO L225 Difference]: With dead ends: 171 [2023-11-29 00:50:08,003 INFO L226 Difference]: Without dead ends: 171 [2023-11-29 00:50:08,004 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 341 GetRequests, 197 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7607 ImplicationChecksByTransitivity, 5.6s TimeCoverageRelationStatistics Valid=2973, Invalid=18197, Unknown=0, NotChecked=0, Total=21170 [2023-11-29 00:50:08,004 INFO L413 NwaCegarLoop]: 63 mSDtfsCounter, 518 mSDsluCounter, 947 mSDsCounter, 0 mSdLazyCounter, 2020 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 518 SdHoareTripleChecker+Valid, 1010 SdHoareTripleChecker+Invalid, 2021 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2020 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:50:08,004 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [518 Valid, 1010 Invalid, 2021 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2020 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 00:50:08,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-29 00:50:08,007 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 166. [2023-11-29 00:50:08,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 166 states, 165 states have (on average 1.1333333333333333) internal successors, (187), 165 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:08,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 187 transitions. [2023-11-29 00:50:08,008 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 187 transitions. Word has length 140 [2023-11-29 00:50:08,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:50:08,009 INFO L495 AbstractCegarLoop]: Abstraction has 166 states and 187 transitions. [2023-11-29 00:50:08,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 123 states have (on average 3.3821138211382116) internal successors, (416), 124 states have internal predecessors, (416), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:08,009 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 187 transitions. [2023-11-29 00:50:08,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 146 [2023-11-29 00:50:08,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:50:08,010 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:50:08,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 00:50:08,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:50:08,210 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:50:08,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:50:08,211 INFO L85 PathProgramCache]: Analyzing trace with hash -1296421052, now seen corresponding path program 31 times [2023-11-29 00:50:08,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:50:08,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609791584] [2023-11-29 00:50:08,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:08,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:50:08,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:50:10,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 77 proven. 1254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:10,162 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:50:10,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609791584] [2023-11-29 00:50:10,162 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1609791584] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:50:10,162 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490860071] [2023-11-29 00:50:10,162 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:50:10,163 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:50:10,163 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:50:10,163 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:50:10,164 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 00:50:10,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:50:10,349 INFO L262 TraceCheckSpWp]: Trace formula consists of 671 conjuncts, 136 conjunts are in the unsatisfiable core [2023-11-29 00:50:10,352 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:50:11,185 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:50:11,349 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 77 proven. 1254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:11,349 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:50:11,502 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:50:11,503 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:50:11,666 INFO L134 CoverageAnalysis]: Checked inductivity of 1331 backedges. 77 proven. 1254 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:11,666 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1490860071] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:50:11,666 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:50:11,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 70 [2023-11-29 00:50:11,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1472551375] [2023-11-29 00:50:11,667 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:50:11,667 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-11-29 00:50:11,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:50:11,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-11-29 00:50:11,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=4656, Unknown=0, NotChecked=0, Total=4830 [2023-11-29 00:50:11,669 INFO L87 Difference]: Start difference. First operand 166 states and 187 transitions. Second operand has 70 states, 70 states have (on average 2.7857142857142856) internal successors, (195), 70 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:15,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:50:15,302 INFO L93 Difference]: Finished difference Result 287 states and 327 transitions. [2023-11-29 00:50:15,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-29 00:50:15,303 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.7857142857142856) internal successors, (195), 70 states have internal predecessors, (195), 0 states have call successors, (0), 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 145 [2023-11-29 00:50:15,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:50:15,304 INFO L225 Difference]: With dead ends: 287 [2023-11-29 00:50:15,304 INFO L226 Difference]: Without dead ends: 169 [2023-11-29 00:50:15,304 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 374 GetRequests, 265 SyntacticMatches, 0 SemanticMatches, 109 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1200 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=432, Invalid=11778, Unknown=0, NotChecked=0, Total=12210 [2023-11-29 00:50:15,305 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 295 mSDsluCounter, 2979 mSDsCounter, 0 mSdLazyCounter, 6273 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 295 SdHoareTripleChecker+Valid, 3040 SdHoareTripleChecker+Invalid, 6311 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 6273 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:50:15,305 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [295 Valid, 3040 Invalid, 6311 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 6273 Invalid, 0 Unknown, 0 Unchecked, 2.2s Time] [2023-11-29 00:50:15,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2023-11-29 00:50:15,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 168. [2023-11-29 00:50:15,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.1317365269461077) internal successors, (189), 167 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 00:50:15,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 189 transitions. [2023-11-29 00:50:15,308 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 189 transitions. Word has length 145 [2023-11-29 00:50:15,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:50:15,308 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 189 transitions. [2023-11-29 00:50:15,308 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.7857142857142856) internal successors, (195), 70 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:15,309 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 189 transitions. [2023-11-29 00:50:15,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 148 [2023-11-29 00:50:15,309 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:50:15,309 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:50:15,315 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 00:50:15,509 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:50:15,510 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:50:15,510 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:50:15,510 INFO L85 PathProgramCache]: Analyzing trace with hash 133793691, now seen corresponding path program 32 times [2023-11-29 00:50:15,510 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:50:15,510 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319676551] [2023-11-29 00:50:15,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:15,510 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:50:15,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:50:17,340 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 324 proven. 1046 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:17,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:50:17,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319676551] [2023-11-29 00:50:17,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1319676551] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:50:17,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [69541168] [2023-11-29 00:50:17,340 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:50:17,340 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:50:17,341 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:50:17,341 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:50:17,342 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 00:50:17,532 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:50:17,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:50:17,537 INFO L262 TraceCheckSpWp]: Trace formula consists of 684 conjuncts, 115 conjunts are in the unsatisfiable core [2023-11-29 00:50:17,540 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:50:18,558 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 361 proven. 1009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:18,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:50:19,850 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:50:20,543 INFO L134 CoverageAnalysis]: Checked inductivity of 1370 backedges. 361 proven. 1009 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:20,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [69541168] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:50:20,543 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:50:20,544 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 88 [2023-11-29 00:50:20,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055409178] [2023-11-29 00:50:20,544 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:50:20,544 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-11-29 00:50:20,545 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:50:20,545 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-11-29 00:50:20,546 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=6825, Unknown=0, NotChecked=0, Total=7832 [2023-11-29 00:50:20,546 INFO L87 Difference]: Start difference. First operand 168 states and 189 transitions. Second operand has 89 states, 88 states have (on average 3.3863636363636362) internal successors, (298), 89 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:23,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:50:23,013 INFO L93 Difference]: Finished difference Result 179 states and 202 transitions. [2023-11-29 00:50:23,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 00:50:23,013 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 3.3863636363636362) internal successors, (298), 89 states have internal predecessors, (298), 0 states have call successors, (0), 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 00:50:23,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:50:23,015 INFO L225 Difference]: With dead ends: 179 [2023-11-29 00:50:23,015 INFO L226 Difference]: Without dead ends: 179 [2023-11-29 00:50:23,016 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 358 GetRequests, 227 SyntacticMatches, 21 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=1415, Invalid=11017, Unknown=0, NotChecked=0, Total=12432 [2023-11-29 00:50:23,016 INFO L413 NwaCegarLoop]: 66 mSDtfsCounter, 444 mSDsluCounter, 1627 mSDsCounter, 0 mSdLazyCounter, 3596 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 444 SdHoareTripleChecker+Valid, 1693 SdHoareTripleChecker+Invalid, 3597 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:50:23,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [444 Valid, 1693 Invalid, 3597 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3596 Invalid, 0 Unknown, 0 Unchecked, 1.5s Time] [2023-11-29 00:50:23,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2023-11-29 00:50:23,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 174. [2023-11-29 00:50:23,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.1329479768786128) internal successors, (196), 173 states have internal predecessors, (196), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:23,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 196 transitions. [2023-11-29 00:50:23,020 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 196 transitions. Word has length 147 [2023-11-29 00:50:23,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:50:23,021 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 196 transitions. [2023-11-29 00:50:23,021 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 3.3863636363636362) internal successors, (298), 89 states have internal predecessors, (298), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:23,021 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 196 transitions. [2023-11-29 00:50:23,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 153 [2023-11-29 00:50:23,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:50:23,022 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:50:23,027 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 00:50:23,222 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:50:23,223 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:50:23,223 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:50:23,223 INFO L85 PathProgramCache]: Analyzing trace with hash 1902844042, now seen corresponding path program 33 times [2023-11-29 00:50:23,223 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:50:23,223 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214393208] [2023-11-29 00:50:23,223 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:23,223 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:50:23,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:50:25,235 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 81 proven. 1390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:25,236 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:50:25,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214393208] [2023-11-29 00:50:25,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [214393208] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:50:25,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1131296770] [2023-11-29 00:50:25,236 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:50:25,236 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:50:25,236 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:50:25,237 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:50:25,238 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 00:50:27,250 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 22 check-sat command(s) [2023-11-29 00:50:27,250 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:50:27,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 702 conjuncts, 142 conjunts are in the unsatisfiable core [2023-11-29 00:50:27,263 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:50:28,177 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:50:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 81 proven. 1390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:28,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:50:28,483 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:50:28,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:50:28,640 INFO L134 CoverageAnalysis]: Checked inductivity of 1471 backedges. 81 proven. 1390 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:28,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1131296770] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:50:28,641 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:50:28,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 73 [2023-11-29 00:50:28,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220774632] [2023-11-29 00:50:28,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:50:28,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-11-29 00:50:28,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:50:28,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-11-29 00:50:28,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=181, Invalid=5075, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 00:50:28,642 INFO L87 Difference]: Start difference. First operand 174 states and 196 transitions. Second operand has 73 states, 73 states have (on average 2.7945205479452055) internal successors, (204), 73 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:32,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:50:32,683 INFO L93 Difference]: Finished difference Result 301 states and 343 transitions. [2023-11-29 00:50:32,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 68 states. [2023-11-29 00:50:32,684 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 73 states have (on average 2.7945205479452055) internal successors, (204), 73 states have internal predecessors, (204), 0 states have call successors, (0), 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 152 [2023-11-29 00:50:32,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:50:32,685 INFO L225 Difference]: With dead ends: 301 [2023-11-29 00:50:32,685 INFO L226 Difference]: Without dead ends: 177 [2023-11-29 00:50:32,686 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 278 SyntacticMatches, 0 SemanticMatches, 114 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1312 ImplicationChecksByTransitivity, 3.5s TimeCoverageRelationStatistics Valid=451, Invalid=12889, Unknown=0, NotChecked=0, Total=13340 [2023-11-29 00:50:32,686 INFO L413 NwaCegarLoop]: 64 mSDtfsCounter, 309 mSDsluCounter, 3304 mSDsCounter, 0 mSdLazyCounter, 6915 mSolverCounterSat, 41 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 309 SdHoareTripleChecker+Valid, 3368 SdHoareTripleChecker+Invalid, 6956 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 41 IncrementalHoareTripleChecker+Valid, 6915 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:50:32,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [309 Valid, 3368 Invalid, 6956 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [41 Valid, 6915 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-29 00:50:32,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-29 00:50:32,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2023-11-29 00:50:32,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.1314285714285715) internal successors, (198), 175 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:32,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 198 transitions. [2023-11-29 00:50:32,689 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 198 transitions. Word has length 152 [2023-11-29 00:50:32,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:50:32,689 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 198 transitions. [2023-11-29 00:50:32,689 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 73 states have (on average 2.7945205479452055) internal successors, (204), 73 states have internal predecessors, (204), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:32,689 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 198 transitions. [2023-11-29 00:50:32,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 155 [2023-11-29 00:50:32,690 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:50:32,690 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 21, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:50:32,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 00:50:32,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2023-11-29 00:50:32,891 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:50:32,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:50:32,891 INFO L85 PathProgramCache]: Analyzing trace with hash 1010761811, now seen corresponding path program 34 times [2023-11-29 00:50:32,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:50:32,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1656996268] [2023-11-29 00:50:32,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:32,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:50:32,936 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:50:35,014 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 361 proven. 1151 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:35,014 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:50:35,014 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1656996268] [2023-11-29 00:50:35,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1656996268] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:50:35,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1257492410] [2023-11-29 00:50:35,015 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:50:35,015 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:50:35,015 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:50:35,015 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:50:35,016 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 00:50:35,297 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:50:35,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:50:35,302 INFO L262 TraceCheckSpWp]: Trace formula consists of 715 conjuncts, 125 conjunts are in the unsatisfiable core [2023-11-29 00:50:35,305 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:50:35,309 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 00:50:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 400 proven. 1112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:36,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:50:39,733 INFO L134 CoverageAnalysis]: Checked inductivity of 1512 backedges. 400 proven. 1112 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:39,733 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1257492410] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:50:39,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:50:39,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 112 [2023-11-29 00:50:39,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1983529911] [2023-11-29 00:50:39,734 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:50:39,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2023-11-29 00:50:39,734 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:50:39,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2023-11-29 00:50:39,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1805, Invalid=10851, Unknown=0, NotChecked=0, Total=12656 [2023-11-29 00:50:39,736 INFO L87 Difference]: Start difference. First operand 176 states and 198 transitions. Second operand has 113 states, 112 states have (on average 3.1875) internal successors, (357), 113 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:43,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:50:43,047 INFO L93 Difference]: Finished difference Result 187 states and 211 transitions. [2023-11-29 00:50:43,048 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 49 states. [2023-11-29 00:50:43,048 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 112 states have (on average 3.1875) internal successors, (357), 113 states have internal predecessors, (357), 0 states have call successors, (0), 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 154 [2023-11-29 00:50:43,048 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:50:43,049 INFO L225 Difference]: With dead ends: 187 [2023-11-29 00:50:43,049 INFO L226 Difference]: Without dead ends: 187 [2023-11-29 00:50:43,050 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 376 GetRequests, 240 SyntacticMatches, 0 SemanticMatches, 136 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6240 ImplicationChecksByTransitivity, 5.8s TimeCoverageRelationStatistics Valid=2819, Invalid=16087, Unknown=0, NotChecked=0, Total=18906 [2023-11-29 00:50:43,050 INFO L413 NwaCegarLoop]: 69 mSDtfsCounter, 597 mSDsluCounter, 1873 mSDsCounter, 0 mSdLazyCounter, 4235 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 597 SdHoareTripleChecker+Valid, 1942 SdHoareTripleChecker+Invalid, 4237 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 4235 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:50:43,050 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [597 Valid, 1942 Invalid, 4237 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 4235 Invalid, 0 Unknown, 0 Unchecked, 1.9s Time] [2023-11-29 00:50:43,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2023-11-29 00:50:43,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 182. [2023-11-29 00:50:43,053 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 182 states, 181 states have (on average 1.132596685082873) internal successors, (205), 181 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 00:50:43,053 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 182 states to 182 states and 205 transitions. [2023-11-29 00:50:43,053 INFO L78 Accepts]: Start accepts. Automaton has 182 states and 205 transitions. Word has length 154 [2023-11-29 00:50:43,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:50:43,053 INFO L495 AbstractCegarLoop]: Abstraction has 182 states and 205 transitions. [2023-11-29 00:50:43,054 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 112 states have (on average 3.1875) internal successors, (357), 113 states have internal predecessors, (357), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:43,054 INFO L276 IsEmpty]: Start isEmpty. Operand 182 states and 205 transitions. [2023-11-29 00:50:43,054 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 160 [2023-11-29 00:50:43,054 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:50:43,054 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:50:43,062 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Forceful destruction successful, exit code 0 [2023-11-29 00:50:43,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-29 00:50:43,255 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:50:43,255 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:50:43,255 INFO L85 PathProgramCache]: Analyzing trace with hash 533484242, now seen corresponding path program 35 times [2023-11-29 00:50:43,255 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:50:43,255 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281062877] [2023-11-29 00:50:43,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:43,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:50:43,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:50:45,386 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 85 proven. 1533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:45,387 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:50:45,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281062877] [2023-11-29 00:50:45,387 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281062877] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:50:45,387 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501123859] [2023-11-29 00:50:45,387 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:50:45,387 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:50:45,387 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:50:45,388 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:50:45,389 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 00:50:46,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 23 check-sat command(s) [2023-11-29 00:50:46,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:50:46,078 INFO L262 TraceCheckSpWp]: Trace formula consists of 733 conjuncts, 148 conjunts are in the unsatisfiable core [2023-11-29 00:50:46,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:50:47,049 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:50:47,232 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 85 proven. 1533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:47,232 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:50:47,363 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:50:47,364 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:50:47,534 INFO L134 CoverageAnalysis]: Checked inductivity of 1618 backedges. 85 proven. 1533 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:47,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1501123859] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:50:47,534 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:50:47,534 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 76 [2023-11-29 00:50:47,534 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66779430] [2023-11-29 00:50:47,534 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:50:47,535 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-11-29 00:50:47,535 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:50:47,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-11-29 00:50:47,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=5512, Unknown=0, NotChecked=0, Total=5700 [2023-11-29 00:50:47,536 INFO L87 Difference]: Start difference. First operand 182 states and 205 transitions. Second operand has 76 states, 76 states have (on average 2.8026315789473686) internal successors, (213), 76 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:51,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:50:51,944 INFO L93 Difference]: Finished difference Result 315 states and 359 transitions. [2023-11-29 00:50:51,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-29 00:50:51,945 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.8026315789473686) internal successors, (213), 76 states have internal predecessors, (213), 0 states have call successors, (0), 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 159 [2023-11-29 00:50:51,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:50:51,946 INFO L225 Difference]: With dead ends: 315 [2023-11-29 00:50:51,946 INFO L226 Difference]: Without dead ends: 185 [2023-11-29 00:50:51,947 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 410 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 3.8s TimeCoverageRelationStatistics Valid=470, Invalid=14050, Unknown=0, NotChecked=0, Total=14520 [2023-11-29 00:50:51,947 INFO L413 NwaCegarLoop]: 67 mSDtfsCounter, 325 mSDsluCounter, 3657 mSDsCounter, 0 mSdLazyCounter, 7568 mSolverCounterSat, 43 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 3724 SdHoareTripleChecker+Invalid, 7611 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 43 IncrementalHoareTripleChecker+Valid, 7568 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:50:51,947 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 3724 Invalid, 7611 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [43 Valid, 7568 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 00:50:51,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2023-11-29 00:50:51,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 184. [2023-11-29 00:50:51,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 184 states, 183 states have (on average 1.1311475409836065) internal successors, (207), 183 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 00:50:51,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 184 states to 184 states and 207 transitions. [2023-11-29 00:50:51,950 INFO L78 Accepts]: Start accepts. Automaton has 184 states and 207 transitions. Word has length 159 [2023-11-29 00:50:51,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:50:51,950 INFO L495 AbstractCegarLoop]: Abstraction has 184 states and 207 transitions. [2023-11-29 00:50:51,950 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.8026315789473686) internal successors, (213), 76 states have internal predecessors, (213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:50:51,950 INFO L276 IsEmpty]: Start isEmpty. Operand 184 states and 207 transitions. [2023-11-29 00:50:51,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-11-29 00:50:51,951 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:50:51,951 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:50:51,958 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 00:50:52,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-29 00:50:52,152 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:50:52,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:50:52,152 INFO L85 PathProgramCache]: Analyzing trace with hash -790444311, now seen corresponding path program 36 times [2023-11-29 00:50:52,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:50:52,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [379715501] [2023-11-29 00:50:52,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:50:52,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:50:52,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:50:54,068 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 400 proven. 1261 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:54,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:50:54,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [379715501] [2023-11-29 00:50:54,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [379715501] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:50:54,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1445980853] [2023-11-29 00:50:54,068 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:50:54,069 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:50:54,069 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:50:54,069 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:50:54,070 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 00:50:57,225 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 23 check-sat command(s) [2023-11-29 00:50:57,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:50:57,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 746 conjuncts, 102 conjunts are in the unsatisfiable core [2023-11-29 00:50:57,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:50:59,247 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 441 proven. 1220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:50:59,247 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:00,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-29 00:51:01,684 INFO L134 CoverageAnalysis]: Checked inductivity of 1661 backedges. 441 proven. 1220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:01,684 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1445980853] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:51:01,684 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:51:01,684 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 48, 48] total 118 [2023-11-29 00:51:01,684 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404993276] [2023-11-29 00:51:01,684 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:51:01,685 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 119 states [2023-11-29 00:51:01,685 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:01,687 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 119 interpolants. [2023-11-29 00:51:01,687 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2247, Invalid=11795, Unknown=0, NotChecked=0, Total=14042 [2023-11-29 00:51:01,687 INFO L87 Difference]: Start difference. First operand 184 states and 207 transitions. Second operand has 119 states, 118 states have (on average 3.6610169491525424) internal successors, (432), 119 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:03,466 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:03,466 INFO L93 Difference]: Finished difference Result 195 states and 220 transitions. [2023-11-29 00:51:03,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 50 states. [2023-11-29 00:51:03,466 INFO L78 Accepts]: Start accepts. Automaton has has 119 states, 118 states have (on average 3.6610169491525424) internal successors, (432), 119 states have internal predecessors, (432), 0 states have call successors, (0), 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 161 [2023-11-29 00:51:03,466 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:03,467 INFO L225 Difference]: With dead ends: 195 [2023-11-29 00:51:03,467 INFO L226 Difference]: Without dead ends: 195 [2023-11-29 00:51:03,468 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 392 GetRequests, 227 SyntacticMatches, 23 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9084 ImplicationChecksByTransitivity, 5.3s TimeCoverageRelationStatistics Valid=3032, Invalid=17560, Unknown=0, NotChecked=0, Total=20592 [2023-11-29 00:51:03,468 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 468 mSDsluCounter, 1354 mSDsCounter, 0 mSdLazyCounter, 2715 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 1427 SdHoareTripleChecker+Invalid, 2716 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2715 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:03,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 1427 Invalid, 2716 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2715 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 00:51:03,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-29 00:51:03,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 190. [2023-11-29 00:51:03,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 190 states, 189 states have (on average 1.1322751322751323) internal successors, (214), 189 states have internal predecessors, (214), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:03,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 190 states to 190 states and 214 transitions. [2023-11-29 00:51:03,471 INFO L78 Accepts]: Start accepts. Automaton has 190 states and 214 transitions. Word has length 161 [2023-11-29 00:51:03,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:03,471 INFO L495 AbstractCegarLoop]: Abstraction has 190 states and 214 transitions. [2023-11-29 00:51:03,471 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 119 states, 118 states have (on average 3.6610169491525424) internal successors, (432), 119 states have internal predecessors, (432), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:03,471 INFO L276 IsEmpty]: Start isEmpty. Operand 190 states and 214 transitions. [2023-11-29 00:51:03,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 167 [2023-11-29 00:51:03,472 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:03,472 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:03,481 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-29 00:51:03,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2023-11-29 00:51:03,673 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:51:03,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:03,673 INFO L85 PathProgramCache]: Analyzing trace with hash -661964292, now seen corresponding path program 37 times [2023-11-29 00:51:03,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:03,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099827181] [2023-11-29 00:51:03,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:03,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:03,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:05,856 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 89 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:05,856 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:05,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099827181] [2023-11-29 00:51:05,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099827181] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:05,856 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524423199] [2023-11-29 00:51:05,856 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:51:05,857 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:05,857 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:05,857 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:05,858 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 00:51:06,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:06,083 INFO L262 TraceCheckSpWp]: Trace formula consists of 764 conjuncts, 154 conjunts are in the unsatisfiable core [2023-11-29 00:51:06,086 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:07,159 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:51:07,338 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 89 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:07,338 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:07,482 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:51:07,484 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:51:07,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1772 backedges. 89 proven. 1683 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:07,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [524423199] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:51:07,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:51:07,660 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 79 [2023-11-29 00:51:07,660 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513278672] [2023-11-29 00:51:07,660 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:51:07,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 79 states [2023-11-29 00:51:07,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:07,661 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 79 interpolants. [2023-11-29 00:51:07,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=195, Invalid=5967, Unknown=0, NotChecked=0, Total=6162 [2023-11-29 00:51:07,662 INFO L87 Difference]: Start difference. First operand 190 states and 214 transitions. Second operand has 79 states, 79 states have (on average 2.810126582278481) internal successors, (222), 79 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:12,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:12,509 INFO L93 Difference]: Finished difference Result 329 states and 375 transitions. [2023-11-29 00:51:12,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 74 states. [2023-11-29 00:51:12,510 INFO L78 Accepts]: Start accepts. Automaton has has 79 states, 79 states have (on average 2.810126582278481) internal successors, (222), 79 states have internal predecessors, (222), 0 states have call successors, (0), 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 166 [2023-11-29 00:51:12,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:12,511 INFO L225 Difference]: With dead ends: 329 [2023-11-29 00:51:12,511 INFO L226 Difference]: Without dead ends: 193 [2023-11-29 00:51:12,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 428 GetRequests, 304 SyntacticMatches, 0 SemanticMatches, 124 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1551 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=489, Invalid=15261, Unknown=0, NotChecked=0, Total=15750 [2023-11-29 00:51:12,512 INFO L413 NwaCegarLoop]: 70 mSDtfsCounter, 494 mSDsluCounter, 3895 mSDsCounter, 0 mSdLazyCounter, 8082 mSolverCounterSat, 44 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 494 SdHoareTripleChecker+Valid, 3965 SdHoareTripleChecker+Invalid, 8126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 44 IncrementalHoareTripleChecker+Valid, 8082 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:12,512 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [494 Valid, 3965 Invalid, 8126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [44 Valid, 8082 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-29 00:51:12,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2023-11-29 00:51:12,514 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 192. [2023-11-29 00:51:12,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.130890052356021) internal successors, (216), 191 states have internal predecessors, (216), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:12,515 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 216 transitions. [2023-11-29 00:51:12,515 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 216 transitions. Word has length 166 [2023-11-29 00:51:12,515 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:12,515 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 216 transitions. [2023-11-29 00:51:12,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 79 states, 79 states have (on average 2.810126582278481) internal successors, (222), 79 states have internal predecessors, (222), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:12,515 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 216 transitions. [2023-11-29 00:51:12,516 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 169 [2023-11-29 00:51:12,516 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:12,516 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 23, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:12,523 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-29 00:51:12,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2023-11-29 00:51:12,717 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:51:12,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:12,717 INFO L85 PathProgramCache]: Analyzing trace with hash 1078283781, now seen corresponding path program 38 times [2023-11-29 00:51:12,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:12,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802984051] [2023-11-29 00:51:12,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:12,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:12,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:14,674 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 441 proven. 1376 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:14,674 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:14,674 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802984051] [2023-11-29 00:51:14,674 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [802984051] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:14,675 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [92026127] [2023-11-29 00:51:14,675 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:51:14,675 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:14,675 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:14,676 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:14,676 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 00:51:14,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:51:14,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:51:14,912 INFO L262 TraceCheckSpWp]: Trace formula consists of 777 conjuncts, 130 conjunts are in the unsatisfiable core [2023-11-29 00:51:14,915 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:16,067 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 484 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:16,067 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:17,555 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:51:18,344 INFO L134 CoverageAnalysis]: Checked inductivity of 1817 backedges. 484 proven. 1333 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:18,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [92026127] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:51:18,344 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:51:18,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 50, 50] total 100 [2023-11-29 00:51:18,345 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258436666] [2023-11-29 00:51:18,345 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:51:18,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-29 00:51:18,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:18,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-29 00:51:18,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1292, Invalid=8808, Unknown=0, NotChecked=0, Total=10100 [2023-11-29 00:51:18,347 INFO L87 Difference]: Start difference. First operand 192 states and 216 transitions. Second operand has 101 states, 100 states have (on average 3.4) internal successors, (340), 101 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:21,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:21,236 INFO L93 Difference]: Finished difference Result 203 states and 229 transitions. [2023-11-29 00:51:21,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-29 00:51:21,236 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 100 states have (on average 3.4) internal successors, (340), 101 states have internal predecessors, (340), 0 states have call successors, (0), 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 168 [2023-11-29 00:51:21,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:21,237 INFO L225 Difference]: With dead ends: 203 [2023-11-29 00:51:21,237 INFO L226 Difference]: Without dead ends: 203 [2023-11-29 00:51:21,238 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 260 SyntacticMatches, 24 SemanticMatches, 125 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7142 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=1793, Invalid=14209, Unknown=0, NotChecked=0, Total=16002 [2023-11-29 00:51:21,238 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 700 mSDsluCounter, 2482 mSDsCounter, 0 mSdLazyCounter, 5228 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 700 SdHoareTripleChecker+Valid, 2558 SdHoareTripleChecker+Invalid, 5229 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5228 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:21,239 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [700 Valid, 2558 Invalid, 5229 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5228 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 00:51:21,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2023-11-29 00:51:21,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 198. [2023-11-29 00:51:21,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.131979695431472) internal successors, (223), 197 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:21,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 223 transitions. [2023-11-29 00:51:21,241 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 223 transitions. Word has length 168 [2023-11-29 00:51:21,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:21,241 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 223 transitions. [2023-11-29 00:51:21,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 100 states have (on average 3.4) internal successors, (340), 101 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:21,242 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 223 transitions. [2023-11-29 00:51:21,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-29 00:51:21,242 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:21,242 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:21,248 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-29 00:51:21,442 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:21,443 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:51:21,443 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:21,443 INFO L85 PathProgramCache]: Analyzing trace with hash 1147978848, now seen corresponding path program 39 times [2023-11-29 00:51:21,443 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:21,443 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171573883] [2023-11-29 00:51:21,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:21,443 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:21,496 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:23,754 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 93 proven. 1840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:23,754 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:23,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171573883] [2023-11-29 00:51:23,754 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1171573883] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:23,754 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [466019381] [2023-11-29 00:51:23,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:51:23,755 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:23,755 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:23,755 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:23,757 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 00:51:26,149 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 25 check-sat command(s) [2023-11-29 00:51:26,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:51:26,158 INFO L262 TraceCheckSpWp]: Trace formula consists of 795 conjuncts, 160 conjunts are in the unsatisfiable core [2023-11-29 00:51:26,162 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:27,399 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:51:27,598 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 93 proven. 1840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:27,598 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:27,751 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:51:27,753 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:51:27,923 INFO L134 CoverageAnalysis]: Checked inductivity of 1933 backedges. 93 proven. 1840 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:27,924 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [466019381] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:51:27,924 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:51:27,924 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 82 [2023-11-29 00:51:27,924 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1196845975] [2023-11-29 00:51:27,924 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:51:27,925 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-11-29 00:51:27,925 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:27,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-11-29 00:51:27,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=6440, Unknown=0, NotChecked=0, Total=6642 [2023-11-29 00:51:27,926 INFO L87 Difference]: Start difference. First operand 198 states and 223 transitions. Second operand has 82 states, 82 states have (on average 2.817073170731707) internal successors, (231), 82 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:33,159 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:33,159 INFO L93 Difference]: Finished difference Result 343 states and 391 transitions. [2023-11-29 00:51:33,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-29 00:51:33,160 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.817073170731707) internal successors, (231), 82 states have internal predecessors, (231), 0 states have call successors, (0), 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 173 [2023-11-29 00:51:33,160 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:33,161 INFO L225 Difference]: With dead ends: 343 [2023-11-29 00:51:33,161 INFO L226 Difference]: Without dead ends: 201 [2023-11-29 00:51:33,162 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 446 GetRequests, 317 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=508, Invalid=16522, Unknown=0, NotChecked=0, Total=17030 [2023-11-29 00:51:33,162 INFO L413 NwaCegarLoop]: 73 mSDtfsCounter, 355 mSDsluCounter, 4424 mSDsCounter, 0 mSdLazyCounter, 9198 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 355 SdHoareTripleChecker+Valid, 4497 SdHoareTripleChecker+Invalid, 9244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 9198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:33,162 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [355 Valid, 4497 Invalid, 9244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 9198 Invalid, 0 Unknown, 0 Unchecked, 3.2s Time] [2023-11-29 00:51:33,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-29 00:51:33,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2023-11-29 00:51:33,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.1306532663316582) internal successors, (225), 199 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:33,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 225 transitions. [2023-11-29 00:51:33,165 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 225 transitions. Word has length 173 [2023-11-29 00:51:33,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:33,165 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 225 transitions. [2023-11-29 00:51:33,165 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.817073170731707) internal successors, (231), 82 states have internal predecessors, (231), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:33,165 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 225 transitions. [2023-11-29 00:51:33,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-11-29 00:51:33,166 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:33,166 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:33,173 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-29 00:51:33,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2023-11-29 00:51:33,367 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:51:33,367 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:33,367 INFO L85 PathProgramCache]: Analyzing trace with hash -706821065, now seen corresponding path program 40 times [2023-11-29 00:51:33,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:33,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182950580] [2023-11-29 00:51:33,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:33,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:33,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:36,056 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 484 proven. 1496 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:36,056 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:36,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182950580] [2023-11-29 00:51:36,056 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182950580] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:36,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1867344986] [2023-11-29 00:51:36,057 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:51:36,057 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:36,057 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:36,058 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:36,058 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-29 00:51:36,552 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:51:36,553 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:51:36,559 INFO L262 TraceCheckSpWp]: Trace formula consists of 808 conjuncts, 140 conjunts are in the unsatisfiable core [2023-11-29 00:51:36,562 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:36,568 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 00:51:38,110 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 529 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:38,110 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:41,986 INFO L134 CoverageAnalysis]: Checked inductivity of 1980 backedges. 529 proven. 1451 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:41,986 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1867344986] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:51:41,986 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:51:41,986 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 51, 51] total 127 [2023-11-29 00:51:41,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829766788] [2023-11-29 00:51:41,986 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:51:41,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 128 states [2023-11-29 00:51:41,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:41,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 128 interpolants. [2023-11-29 00:51:41,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2312, Invalid=13944, Unknown=0, NotChecked=0, Total=16256 [2023-11-29 00:51:41,989 INFO L87 Difference]: Start difference. First operand 200 states and 225 transitions. Second operand has 128 states, 127 states have (on average 3.188976377952756) internal successors, (405), 128 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:46,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:46,327 INFO L93 Difference]: Finished difference Result 211 states and 238 transitions. [2023-11-29 00:51:46,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 55 states. [2023-11-29 00:51:46,328 INFO L78 Accepts]: Start accepts. Automaton has has 128 states, 127 states have (on average 3.188976377952756) internal successors, (405), 128 states have internal predecessors, (405), 0 states have call successors, (0), 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 175 [2023-11-29 00:51:46,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:46,329 INFO L225 Difference]: With dead ends: 211 [2023-11-29 00:51:46,329 INFO L226 Difference]: Without dead ends: 211 [2023-11-29 00:51:46,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 427 GetRequests, 273 SyntacticMatches, 0 SemanticMatches, 154 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8106 ImplicationChecksByTransitivity, 7.2s TimeCoverageRelationStatistics Valid=3575, Invalid=20605, Unknown=0, NotChecked=0, Total=24180 [2023-11-29 00:51:46,330 INFO L413 NwaCegarLoop]: 78 mSDtfsCounter, 1285 mSDsluCounter, 2608 mSDsCounter, 0 mSdLazyCounter, 5446 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1285 SdHoareTripleChecker+Valid, 2686 SdHoareTripleChecker+Invalid, 5449 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 5446 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:46,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1285 Valid, 2686 Invalid, 5449 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 5446 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 00:51:46,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-29 00:51:46,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 206. [2023-11-29 00:51:46,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 205 states have (on average 1.1317073170731706) internal successors, (232), 205 states have internal predecessors, (232), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:46,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 232 transitions. [2023-11-29 00:51:46,333 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 232 transitions. Word has length 175 [2023-11-29 00:51:46,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:46,333 INFO L495 AbstractCegarLoop]: Abstraction has 206 states and 232 transitions. [2023-11-29 00:51:46,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 128 states, 127 states have (on average 3.188976377952756) internal successors, (405), 128 states have internal predecessors, (405), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:46,334 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 232 transitions. [2023-11-29 00:51:46,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 181 [2023-11-29 00:51:46,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:46,334 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:46,340 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-29 00:51:46,535 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:46,535 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:51:46,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:46,535 INFO L85 PathProgramCache]: Analyzing trace with hash -140550802, now seen corresponding path program 41 times [2023-11-29 00:51:46,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:46,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1137383976] [2023-11-29 00:51:46,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:46,536 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:46,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:49,142 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 97 proven. 2004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:49,143 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:49,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1137383976] [2023-11-29 00:51:49,143 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1137383976] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:49,143 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095387455] [2023-11-29 00:51:49,143 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:51:49,143 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:49,143 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:49,144 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:49,145 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-29 00:51:49,940 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 26 check-sat command(s) [2023-11-29 00:51:49,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:51:49,947 INFO L262 TraceCheckSpWp]: Trace formula consists of 826 conjuncts, 166 conjunts are in the unsatisfiable core [2023-11-29 00:51:49,951 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:51:51,265 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:51:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 97 proven. 2004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:51,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:51:51,637 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:51:51,638 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:51:51,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2101 backedges. 97 proven. 2004 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:51,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1095387455] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:51:51,829 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:51:51,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 85 [2023-11-29 00:51:51,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256971487] [2023-11-29 00:51:51,830 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:51:51,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 85 states [2023-11-29 00:51:51,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:51:51,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 85 interpolants. [2023-11-29 00:51:51,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=209, Invalid=6931, Unknown=0, NotChecked=0, Total=7140 [2023-11-29 00:51:51,832 INFO L87 Difference]: Start difference. First operand 206 states and 232 transitions. Second operand has 85 states, 85 states have (on average 2.823529411764706) internal successors, (240), 85 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:57,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:51:57,272 INFO L93 Difference]: Finished difference Result 357 states and 407 transitions. [2023-11-29 00:51:57,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 80 states. [2023-11-29 00:51:57,272 INFO L78 Accepts]: Start accepts. Automaton has has 85 states, 85 states have (on average 2.823529411764706) internal successors, (240), 85 states have internal predecessors, (240), 0 states have call successors, (0), 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 180 [2023-11-29 00:51:57,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:51:57,273 INFO L225 Difference]: With dead ends: 357 [2023-11-29 00:51:57,273 INFO L226 Difference]: Without dead ends: 209 [2023-11-29 00:51:57,274 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 464 GetRequests, 330 SyntacticMatches, 0 SemanticMatches, 134 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1810 ImplicationChecksByTransitivity, 4.6s TimeCoverageRelationStatistics Valid=527, Invalid=17833, Unknown=0, NotChecked=0, Total=18360 [2023-11-29 00:51:57,274 INFO L413 NwaCegarLoop]: 76 mSDtfsCounter, 370 mSDsluCounter, 4753 mSDsCounter, 0 mSdLazyCounter, 9850 mSolverCounterSat, 49 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 370 SdHoareTripleChecker+Valid, 4829 SdHoareTripleChecker+Invalid, 9899 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 49 IncrementalHoareTripleChecker+Valid, 9850 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:51:57,274 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [370 Valid, 4829 Invalid, 9899 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [49 Valid, 9850 Invalid, 0 Unknown, 0 Unchecked, 3.3s Time] [2023-11-29 00:51:57,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2023-11-29 00:51:57,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 208. [2023-11-29 00:51:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 208 states, 207 states have (on average 1.1304347826086956) internal successors, (234), 207 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 00:51:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 208 states to 208 states and 234 transitions. [2023-11-29 00:51:57,277 INFO L78 Accepts]: Start accepts. Automaton has 208 states and 234 transitions. Word has length 180 [2023-11-29 00:51:57,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:51:57,277 INFO L495 AbstractCegarLoop]: Abstraction has 208 states and 234 transitions. [2023-11-29 00:51:57,278 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 85 states, 85 states have (on average 2.823529411764706) internal successors, (240), 85 states have internal predecessors, (240), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:51:57,278 INFO L276 IsEmpty]: Start isEmpty. Operand 208 states and 234 transitions. [2023-11-29 00:51:57,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 183 [2023-11-29 00:51:57,278 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:51:57,278 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 25, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:51:57,285 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-29 00:51:57,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:57,479 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:51:57,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:51:57,479 INFO L85 PathProgramCache]: Analyzing trace with hash -1629672009, now seen corresponding path program 42 times [2023-11-29 00:51:57,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:51:57,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717676291] [2023-11-29 00:51:57,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:51:57,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:51:57,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:51:59,835 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 529 proven. 1621 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:51:59,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:51:59,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717676291] [2023-11-29 00:51:59,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717676291] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:51:59,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812471420] [2023-11-29 00:51:59,836 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:51:59,836 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:51:59,836 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:51:59,837 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:51:59,838 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-29 00:52:03,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 26 check-sat command(s) [2023-11-29 00:52:03,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:52:03,322 INFO L262 TraceCheckSpWp]: Trace formula consists of 839 conjuncts, 116 conjunts are in the unsatisfiable core [2023-11-29 00:52:03,325 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:52:05,732 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 576 proven. 1574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:05,732 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:52:07,966 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-29 00:52:08,845 INFO L134 CoverageAnalysis]: Checked inductivity of 2150 backedges. 576 proven. 1574 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:08,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812471420] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:52:08,845 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:52:08,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 54, 54] total 133 [2023-11-29 00:52:08,846 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875496952] [2023-11-29 00:52:08,846 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:52:08,846 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 134 states [2023-11-29 00:52:08,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:52:08,848 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 134 interpolants. [2023-11-29 00:52:08,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2850, Invalid=14972, Unknown=0, NotChecked=0, Total=17822 [2023-11-29 00:52:08,849 INFO L87 Difference]: Start difference. First operand 208 states and 234 transitions. Second operand has 134 states, 133 states have (on average 3.6766917293233083) internal successors, (489), 134 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:52:11,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:52:11,242 INFO L93 Difference]: Finished difference Result 219 states and 247 transitions. [2023-11-29 00:52:11,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 56 states. [2023-11-29 00:52:11,243 INFO L78 Accepts]: Start accepts. Automaton has has 134 states, 133 states have (on average 3.6766917293233083) internal successors, (489), 134 states have internal predecessors, (489), 0 states have call successors, (0), 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 182 [2023-11-29 00:52:11,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:52:11,244 INFO L225 Difference]: With dead ends: 219 [2023-11-29 00:52:11,244 INFO L226 Difference]: Without dead ends: 219 [2023-11-29 00:52:11,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 443 GetRequests, 257 SyntacticMatches, 26 SemanticMatches, 160 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11637 ImplicationChecksByTransitivity, 6.7s TimeCoverageRelationStatistics Valid=3815, Invalid=22267, Unknown=0, NotChecked=0, Total=26082 [2023-11-29 00:52:11,246 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 549 mSDsluCounter, 1677 mSDsCounter, 0 mSdLazyCounter, 3398 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 549 SdHoareTripleChecker+Valid, 1759 SdHoareTripleChecker+Invalid, 3399 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3398 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 00:52:11,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [549 Valid, 1759 Invalid, 3399 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3398 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 00:52:11,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-11-29 00:52:11,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 214. [2023-11-29 00:52:11,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 214 states, 213 states have (on average 1.1314553990610328) internal successors, (241), 213 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:52:11,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 214 states to 214 states and 241 transitions. [2023-11-29 00:52:11,250 INFO L78 Accepts]: Start accepts. Automaton has 214 states and 241 transitions. Word has length 182 [2023-11-29 00:52:11,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:52:11,250 INFO L495 AbstractCegarLoop]: Abstraction has 214 states and 241 transitions. [2023-11-29 00:52:11,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 134 states, 133 states have (on average 3.6766917293233083) internal successors, (489), 134 states have internal predecessors, (489), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:52:11,250 INFO L276 IsEmpty]: Start isEmpty. Operand 214 states and 241 transitions. [2023-11-29 00:52:11,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-29 00:52:11,251 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:52:11,251 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:52:11,261 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-11-29 00:52:11,452 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-11-29 00:52:11,452 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:52:11,452 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:52:11,452 INFO L85 PathProgramCache]: Analyzing trace with hash 614917102, now seen corresponding path program 43 times [2023-11-29 00:52:11,452 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:52:11,452 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091619536] [2023-11-29 00:52:11,452 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:11,453 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:52:11,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:14,411 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 101 proven. 2175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:14,412 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:52:14,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091619536] [2023-11-29 00:52:14,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091619536] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:52:14,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [684683555] [2023-11-29 00:52:14,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:52:14,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:14,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:52:14,413 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:52:14,414 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-29 00:52:14,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:14,688 INFO L262 TraceCheckSpWp]: Trace formula consists of 857 conjuncts, 172 conjunts are in the unsatisfiable core [2023-11-29 00:52:14,694 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:52:16,123 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:52:16,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 101 proven. 2175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:16,350 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:52:16,513 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:52:16,514 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:52:16,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2276 backedges. 101 proven. 2175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:16,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [684683555] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:52:16,700 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:52:16,700 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 88 [2023-11-29 00:52:16,700 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695021300] [2023-11-29 00:52:16,700 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:52:16,701 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-11-29 00:52:16,701 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:52:16,702 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-11-29 00:52:16,702 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=7440, Unknown=0, NotChecked=0, Total=7656 [2023-11-29 00:52:16,702 INFO L87 Difference]: Start difference. First operand 214 states and 241 transitions. Second operand has 88 states, 88 states have (on average 2.8295454545454546) internal successors, (249), 88 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:52:22,628 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:52:22,628 INFO L93 Difference]: Finished difference Result 371 states and 423 transitions. [2023-11-29 00:52:22,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-11-29 00:52:22,629 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.8295454545454546) internal successors, (249), 88 states have internal predecessors, (249), 0 states have call successors, (0), 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 187 [2023-11-29 00:52:22,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:52:22,630 INFO L225 Difference]: With dead ends: 371 [2023-11-29 00:52:22,630 INFO L226 Difference]: Without dead ends: 217 [2023-11-29 00:52:22,631 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 482 GetRequests, 343 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1947 ImplicationChecksByTransitivity, 5.2s TimeCoverageRelationStatistics Valid=546, Invalid=19194, Unknown=0, NotChecked=0, Total=19740 [2023-11-29 00:52:22,631 INFO L413 NwaCegarLoop]: 79 mSDtfsCounter, 563 mSDsluCounter, 4711 mSDsCounter, 0 mSdLazyCounter, 9810 mSolverCounterSat, 51 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 563 SdHoareTripleChecker+Valid, 4790 SdHoareTripleChecker+Invalid, 9861 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 51 IncrementalHoareTripleChecker+Valid, 9810 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:52:22,631 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [563 Valid, 4790 Invalid, 9861 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [51 Valid, 9810 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-29 00:52:22,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2023-11-29 00:52:22,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 216. [2023-11-29 00:52:22,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.130232558139535) internal successors, (243), 215 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:52:22,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 243 transitions. [2023-11-29 00:52:22,635 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 243 transitions. Word has length 187 [2023-11-29 00:52:22,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:52:22,635 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 243 transitions. [2023-11-29 00:52:22,636 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.8295454545454546) internal successors, (249), 88 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:52:22,636 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 243 transitions. [2023-11-29 00:52:22,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 190 [2023-11-29 00:52:22,637 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:52:22,637 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:52:22,643 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Forceful destruction successful, exit code 0 [2023-11-29 00:52:22,837 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-11-29 00:52:22,837 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:52:22,838 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:52:22,838 INFO L85 PathProgramCache]: Analyzing trace with hash -495657083, now seen corresponding path program 44 times [2023-11-29 00:52:22,838 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:52:22,838 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1625065296] [2023-11-29 00:52:22,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:22,838 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:52:22,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:25,512 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 576 proven. 1751 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:25,512 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:52:25,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1625065296] [2023-11-29 00:52:25,512 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1625065296] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:52:25,512 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883894831] [2023-11-29 00:52:25,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:52:25,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:25,513 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:52:25,513 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:52:25,514 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-29 00:52:25,772 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:52:25,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:52:25,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 870 conjuncts, 145 conjunts are in the unsatisfiable core [2023-11-29 00:52:25,783 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:52:27,212 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 625 proven. 1702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:27,212 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:52:29,033 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:52:29,980 INFO L134 CoverageAnalysis]: Checked inductivity of 2327 backedges. 625 proven. 1702 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:29,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1883894831] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:52:29,980 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:52:29,981 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 56, 56] total 112 [2023-11-29 00:52:29,981 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000688824] [2023-11-29 00:52:29,981 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:52:29,982 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 113 states [2023-11-29 00:52:29,982 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:52:29,983 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 113 interpolants. [2023-11-29 00:52:29,983 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1613, Invalid=11043, Unknown=0, NotChecked=0, Total=12656 [2023-11-29 00:52:29,984 INFO L87 Difference]: Start difference. First operand 216 states and 243 transitions. Second operand has 113 states, 112 states have (on average 3.4107142857142856) internal successors, (382), 113 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:52:33,314 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:52:33,314 INFO L93 Difference]: Finished difference Result 227 states and 256 transitions. [2023-11-29 00:52:33,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 58 states. [2023-11-29 00:52:33,315 INFO L78 Accepts]: Start accepts. Automaton has has 113 states, 112 states have (on average 3.4107142857142856) internal successors, (382), 113 states have internal predecessors, (382), 0 states have call successors, (0), 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 189 [2023-11-29 00:52:33,315 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:52:33,316 INFO L225 Difference]: With dead ends: 227 [2023-11-29 00:52:33,316 INFO L226 Difference]: Without dead ends: 227 [2023-11-29 00:52:33,317 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 460 GetRequests, 293 SyntacticMatches, 27 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9050 ImplicationChecksByTransitivity, 5.4s TimeCoverageRelationStatistics Valid=2216, Invalid=17806, Unknown=0, NotChecked=0, Total=20022 [2023-11-29 00:52:33,317 INFO L413 NwaCegarLoop]: 85 mSDtfsCounter, 874 mSDsluCounter, 2701 mSDsCounter, 0 mSdLazyCounter, 5686 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 874 SdHoareTripleChecker+Valid, 2786 SdHoareTripleChecker+Invalid, 5687 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:52:33,317 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [874 Valid, 2786 Invalid, 5687 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5686 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-29 00:52:33,317 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-29 00:52:33,319 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 222. [2023-11-29 00:52:33,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.1312217194570136) internal successors, (250), 221 states have internal predecessors, (250), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:52:33,320 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 250 transitions. [2023-11-29 00:52:33,320 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 250 transitions. Word has length 189 [2023-11-29 00:52:33,320 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:52:33,320 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 250 transitions. [2023-11-29 00:52:33,320 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 113 states, 112 states have (on average 3.4107142857142856) internal successors, (382), 113 states have internal predecessors, (382), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:52:33,320 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 250 transitions. [2023-11-29 00:52:33,321 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 195 [2023-11-29 00:52:33,321 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:52:33,321 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:52:33,327 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-29 00:52:33,522 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:33,522 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:52:33,522 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:52:33,522 INFO L85 PathProgramCache]: Analyzing trace with hash -256105760, now seen corresponding path program 45 times [2023-11-29 00:52:33,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:52:33,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1254455907] [2023-11-29 00:52:33,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:33,523 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:52:33,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:36,763 INFO L134 CoverageAnalysis]: Checked inductivity of 2458 backedges. 105 proven. 2353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:36,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:52:36,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1254455907] [2023-11-29 00:52:36,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1254455907] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:52:36,763 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [56640227] [2023-11-29 00:52:36,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:52:36,763 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:36,763 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:52:36,764 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:52:36,765 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-29 00:52:39,562 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 28 check-sat command(s) [2023-11-29 00:52:39,562 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:52:39,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 888 conjuncts, 176 conjunts are in the unsatisfiable core [2023-11-29 00:52:39,576 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:52:41,063 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:52:41,290 INFO L134 CoverageAnalysis]: Checked inductivity of 2458 backedges. 105 proven. 2353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:41,291 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:52:41,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:52:41,467 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:52:41,637 INFO L134 CoverageAnalysis]: Checked inductivity of 2458 backedges. 105 proven. 2353 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:41,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [56640227] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:52:41,637 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:52:41,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 59, 59] total 91 [2023-11-29 00:52:41,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723337365] [2023-11-29 00:52:41,638 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:52:41,638 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 91 states [2023-11-29 00:52:41,639 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:52:41,639 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 91 interpolants. [2023-11-29 00:52:41,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=223, Invalid=7967, Unknown=0, NotChecked=0, Total=8190 [2023-11-29 00:52:41,640 INFO L87 Difference]: Start difference. First operand 222 states and 250 transitions. Second operand has 91 states, 91 states have (on average 2.8351648351648353) internal successors, (258), 91 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:52:48,207 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:52:48,207 INFO L93 Difference]: Finished difference Result 385 states and 439 transitions. [2023-11-29 00:52:48,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 86 states. [2023-11-29 00:52:48,207 INFO L78 Accepts]: Start accepts. Automaton has has 91 states, 91 states have (on average 2.8351648351648353) internal successors, (258), 91 states have internal predecessors, (258), 0 states have call successors, (0), 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 194 [2023-11-29 00:52:48,208 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:52:48,208 INFO L225 Difference]: With dead ends: 385 [2023-11-29 00:52:48,208 INFO L226 Difference]: Without dead ends: 225 [2023-11-29 00:52:48,209 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 500 GetRequests, 356 SyntacticMatches, 0 SemanticMatches, 144 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2089 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=565, Invalid=20605, Unknown=0, NotChecked=0, Total=21170 [2023-11-29 00:52:48,210 INFO L413 NwaCegarLoop]: 82 mSDtfsCounter, 216 mSDsluCounter, 5550 mSDsCounter, 0 mSdLazyCounter, 11538 mSolverCounterSat, 52 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 216 SdHoareTripleChecker+Valid, 5632 SdHoareTripleChecker+Invalid, 11590 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 52 IncrementalHoareTripleChecker+Valid, 11538 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:52:48,210 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [216 Valid, 5632 Invalid, 11590 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [52 Valid, 11538 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-29 00:52:48,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2023-11-29 00:52:48,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 224. [2023-11-29 00:52:48,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 224 states, 223 states have (on average 1.1300448430493273) internal successors, (252), 223 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:52:48,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 224 states to 224 states and 252 transitions. [2023-11-29 00:52:48,213 INFO L78 Accepts]: Start accepts. Automaton has 224 states and 252 transitions. Word has length 194 [2023-11-29 00:52:48,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:52:48,213 INFO L495 AbstractCegarLoop]: Abstraction has 224 states and 252 transitions. [2023-11-29 00:52:48,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 91 states, 91 states have (on average 2.8351648351648353) internal successors, (258), 91 states have internal predecessors, (258), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:52:48,214 INFO L276 IsEmpty]: Start isEmpty. Operand 224 states and 252 transitions. [2023-11-29 00:52:48,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 197 [2023-11-29 00:52:48,215 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:52:48,215 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 27, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:52:48,222 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2023-11-29 00:52:48,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:48,415 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:52:48,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:52:48,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1893777559, now seen corresponding path program 46 times [2023-11-29 00:52:48,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:52:48,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065507136] [2023-11-29 00:52:48,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:52:48,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:52:48,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:52:51,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 625 proven. 1886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:51,803 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:52:51,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065507136] [2023-11-29 00:52:51,803 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065507136] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:52:51,803 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1993761607] [2023-11-29 00:52:51,803 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:52:51,803 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:52:51,803 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:52:51,804 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:52:51,805 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-29 00:52:52,319 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:52:52,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:52:52,326 INFO L262 TraceCheckSpWp]: Trace formula consists of 901 conjuncts, 155 conjunts are in the unsatisfiable core [2023-11-29 00:52:52,329 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:52:52,334 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 00:52:53,965 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 676 proven. 1835 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:53,965 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:52:58,748 INFO L134 CoverageAnalysis]: Checked inductivity of 2511 backedges. 676 proven. 1835 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:52:58,749 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1993761607] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:52:58,749 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:52:58,749 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 142 [2023-11-29 00:52:58,749 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704262264] [2023-11-29 00:52:58,749 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:52:58,750 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 143 states [2023-11-29 00:52:58,750 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:52:58,751 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 143 interpolants. [2023-11-29 00:52:58,751 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2882, Invalid=17424, Unknown=0, NotChecked=0, Total=20306 [2023-11-29 00:52:58,752 INFO L87 Difference]: Start difference. First operand 224 states and 252 transitions. Second operand has 143 states, 142 states have (on average 3.1901408450704225) internal successors, (453), 143 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:53:03,565 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:53:03,565 INFO L93 Difference]: Finished difference Result 235 states and 265 transitions. [2023-11-29 00:53:03,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 61 states. [2023-11-29 00:53:03,566 INFO L78 Accepts]: Start accepts. Automaton has has 143 states, 142 states have (on average 3.1901408450704225) internal successors, (453), 143 states have internal predecessors, (453), 0 states have call successors, (0), 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 196 [2023-11-29 00:53:03,566 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:53:03,567 INFO L225 Difference]: With dead ends: 235 [2023-11-29 00:53:03,567 INFO L226 Difference]: Without dead ends: 235 [2023-11-29 00:53:03,569 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 478 GetRequests, 306 SyntacticMatches, 0 SemanticMatches, 172 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10215 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=4421, Invalid=25681, Unknown=0, NotChecked=0, Total=30102 [2023-11-29 00:53:03,569 INFO L413 NwaCegarLoop]: 87 mSDtfsCounter, 2311 mSDsluCounter, 3031 mSDsCounter, 0 mSdLazyCounter, 6501 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2311 SdHoareTripleChecker+Valid, 3118 SdHoareTripleChecker+Invalid, 6508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 6501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.8s IncrementalHoareTripleChecker+Time [2023-11-29 00:53:03,569 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2311 Valid, 3118 Invalid, 6508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 6501 Invalid, 0 Unknown, 0 Unchecked, 2.8s Time] [2023-11-29 00:53:03,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2023-11-29 00:53:03,572 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 230. [2023-11-29 00:53:03,572 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 230 states, 229 states have (on average 1.1310043668122272) internal successors, (259), 229 states have internal predecessors, (259), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:53:03,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 230 states to 230 states and 259 transitions. [2023-11-29 00:53:03,573 INFO L78 Accepts]: Start accepts. Automaton has 230 states and 259 transitions. Word has length 196 [2023-11-29 00:53:03,573 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:53:03,573 INFO L495 AbstractCegarLoop]: Abstraction has 230 states and 259 transitions. [2023-11-29 00:53:03,573 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 143 states, 142 states have (on average 3.1901408450704225) internal successors, (453), 143 states have internal predecessors, (453), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:53:03,573 INFO L276 IsEmpty]: Start isEmpty. Operand 230 states and 259 transitions. [2023-11-29 00:53:03,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 202 [2023-11-29 00:53:03,574 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:53:03,574 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:53:03,581 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-11-29 00:53:03,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-11-29 00:53:03,775 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:53:03,775 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:53:03,775 INFO L85 PathProgramCache]: Analyzing trace with hash 1069945212, now seen corresponding path program 47 times [2023-11-29 00:53:03,775 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:53:03,775 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330526699] [2023-11-29 00:53:03,776 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:53:03,776 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:53:03,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:53:06,932 INFO L134 CoverageAnalysis]: Checked inductivity of 2647 backedges. 109 proven. 2538 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:53:06,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:53:06,932 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330526699] [2023-11-29 00:53:06,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1330526699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:53:06,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987164883] [2023-11-29 00:53:06,933 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:53:06,933 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:53:06,933 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:53:06,933 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:53:06,934 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-29 00:53:07,844 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 29 check-sat command(s) [2023-11-29 00:53:07,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:53:07,852 INFO L262 TraceCheckSpWp]: Trace formula consists of 919 conjuncts, 164 conjunts are in the unsatisfiable core [2023-11-29 00:53:07,857 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:53:07,863 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 00:53:09,586 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-29 00:53:27,830 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:53:27,831 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 15 [2023-11-29 00:53:28,177 INFO L134 CoverageAnalysis]: Checked inductivity of 2647 backedges. 676 proven. 1967 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:53:28,177 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:53:32,911 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:53:32,914 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:53:39,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2647 backedges. 676 proven. 1971 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:53:39,251 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [987164883] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:53:39,251 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:53:39,251 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 60, 60] total 179 [2023-11-29 00:53:39,251 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [161322943] [2023-11-29 00:53:39,251 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:53:39,252 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 179 states [2023-11-29 00:53:39,252 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:53:39,254 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 179 interpolants. [2023-11-29 00:53:39,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2726, Invalid=29132, Unknown=4, NotChecked=0, Total=31862 [2023-11-29 00:53:39,256 INFO L87 Difference]: Start difference. First operand 230 states and 259 transitions. Second operand has 179 states, 179 states have (on average 3.346368715083799) internal successors, (599), 179 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:53:58,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:53:58,913 INFO L93 Difference]: Finished difference Result 411 states and 469 transitions. [2023-11-29 00:53:58,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 97 states. [2023-11-29 00:53:58,914 INFO L78 Accepts]: Start accepts. Automaton has has 179 states, 179 states have (on average 3.346368715083799) internal successors, (599), 179 states have internal predecessors, (599), 0 states have call successors, (0), 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 201 [2023-11-29 00:53:58,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:53:58,915 INFO L225 Difference]: With dead ends: 411 [2023-11-29 00:53:58,915 INFO L226 Difference]: Without dead ends: 245 [2023-11-29 00:53:58,918 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 527 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 243 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10624 ImplicationChecksByTransitivity, 41.1s TimeCoverageRelationStatistics Valid=4430, Invalid=55346, Unknown=4, NotChecked=0, Total=59780 [2023-11-29 00:53:58,918 INFO L413 NwaCegarLoop]: 90 mSDtfsCounter, 1682 mSDsluCounter, 5499 mSDsCounter, 0 mSdLazyCounter, 11973 mSolverCounterSat, 502 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1682 SdHoareTripleChecker+Valid, 5589 SdHoareTripleChecker+Invalid, 12476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 502 IncrementalHoareTripleChecker+Valid, 11973 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:53:58,918 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1682 Valid, 5589 Invalid, 12476 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [502 Valid, 11973 Invalid, 1 Unknown, 0 Unchecked, 8.0s Time] [2023-11-29 00:53:58,919 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-11-29 00:53:58,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 238. [2023-11-29 00:53:58,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 237 states have (on average 1.130801687763713) internal successors, (268), 237 states have internal predecessors, (268), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:53:58,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 268 transitions. [2023-11-29 00:53:58,921 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 268 transitions. Word has length 201 [2023-11-29 00:53:58,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:53:58,921 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 268 transitions. [2023-11-29 00:53:58,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 179 states, 179 states have (on average 3.346368715083799) internal successors, (599), 179 states have internal predecessors, (599), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:53:58,922 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 268 transitions. [2023-11-29 00:53:58,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 209 [2023-11-29 00:53:58,922 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:53:58,922 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 29, 29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:53:58,930 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Ended with exit code 0 [2023-11-29 00:53:59,123 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-11-29 00:53:59,123 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:53:59,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:53:59,123 INFO L85 PathProgramCache]: Analyzing trace with hash -1682560430, now seen corresponding path program 48 times [2023-11-29 00:53:59,123 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:53:59,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919196075] [2023-11-29 00:53:59,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:53:59,124 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:53:59,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:54:02,538 INFO L134 CoverageAnalysis]: Checked inductivity of 2843 backedges. 113 proven. 2730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:54:02,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:54:02,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919196075] [2023-11-29 00:54:02,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [919196075] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:54:02,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26793291] [2023-11-29 00:54:02,539 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:54:02,539 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:54:02,539 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:54:02,540 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:54:02,541 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-29 00:54:08,870 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 30 check-sat command(s) [2023-11-29 00:54:08,870 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:54:08,882 INFO L262 TraceCheckSpWp]: Trace formula consists of 950 conjuncts, 194 conjunts are in the unsatisfiable core [2023-11-29 00:54:08,887 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:54:09,099 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:54:11,170 INFO L134 CoverageAnalysis]: Checked inductivity of 2843 backedges. 113 proven. 2730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:54:11,170 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:54:11,401 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:54:11,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:54:13,434 INFO L134 CoverageAnalysis]: Checked inductivity of 2843 backedges. 113 proven. 2730 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:54:13,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26793291] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:54:13,434 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:54:13,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 124 [2023-11-29 00:54:13,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817327725] [2023-11-29 00:54:13,434 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:54:13,435 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 124 states [2023-11-29 00:54:13,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:54:13,436 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 124 interpolants. [2023-11-29 00:54:13,437 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=318, Invalid=14934, Unknown=0, NotChecked=0, Total=15252 [2023-11-29 00:54:13,438 INFO L87 Difference]: Start difference. First operand 238 states and 268 transitions. Second operand has 124 states, 124 states have (on average 3.3225806451612905) internal successors, (412), 124 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:54:21,560 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:54:21,560 INFO L93 Difference]: Finished difference Result 413 states and 471 transitions. [2023-11-29 00:54:21,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 92 states. [2023-11-29 00:54:21,560 INFO L78 Accepts]: Start accepts. Automaton has has 124 states, 124 states have (on average 3.3225806451612905) internal successors, (412), 124 states have internal predecessors, (412), 0 states have call successors, (0), 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 208 [2023-11-29 00:54:21,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:54:21,562 INFO L225 Difference]: With dead ends: 413 [2023-11-29 00:54:21,562 INFO L226 Difference]: Without dead ends: 241 [2023-11-29 00:54:21,564 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 535 GetRequests, 355 SyntacticMatches, 0 SemanticMatches, 180 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5255 ImplicationChecksByTransitivity, 8.2s TimeCoverageRelationStatistics Valid=702, Invalid=32240, Unknown=0, NotChecked=0, Total=32942 [2023-11-29 00:54:21,564 INFO L413 NwaCegarLoop]: 88 mSDtfsCounter, 242 mSDsluCounter, 7318 mSDsCounter, 0 mSdLazyCounter, 15180 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 242 SdHoareTripleChecker+Valid, 7406 SdHoareTripleChecker+Invalid, 15249 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 15180 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:54:21,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [242 Valid, 7406 Invalid, 15249 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [69 Valid, 15180 Invalid, 0 Unknown, 0 Unchecked, 5.2s Time] [2023-11-29 00:54:21,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 241 states. [2023-11-29 00:54:21,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 241 to 240. [2023-11-29 00:54:21,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 239 states have (on average 1.1297071129707112) internal successors, (270), 239 states have internal predecessors, (270), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:54:21,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 270 transitions. [2023-11-29 00:54:21,567 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 270 transitions. Word has length 208 [2023-11-29 00:54:21,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:54:21,567 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 270 transitions. [2023-11-29 00:54:21,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 124 states, 124 states have (on average 3.3225806451612905) internal successors, (412), 124 states have internal predecessors, (412), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:54:21,567 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 270 transitions. [2023-11-29 00:54:21,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 211 [2023-11-29 00:54:21,568 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:54:21,568 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 29, 29, 29, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:54:21,578 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-11-29 00:54:21,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-29 00:54:21,769 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:54:21,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:54:21,769 INFO L85 PathProgramCache]: Analyzing trace with hash -421256421, now seen corresponding path program 49 times [2023-11-29 00:54:21,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:54:21,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612867275] [2023-11-29 00:54:21,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:54:21,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:54:21,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:54:24,853 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 729 proven. 2171 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:54:24,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:54:24,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612867275] [2023-11-29 00:54:24,853 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612867275] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:54:24,853 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461643346] [2023-11-29 00:54:24,853 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:54:24,853 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:54:24,853 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:54:24,854 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:54:24,855 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-29 00:54:25,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:54:25,125 INFO L262 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 160 conjunts are in the unsatisfiable core [2023-11-29 00:54:25,128 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:54:26,837 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 784 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:54:26,837 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:54:29,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:54:30,237 INFO L134 CoverageAnalysis]: Checked inductivity of 2900 backedges. 784 proven. 2116 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:54:30,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1461643346] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:54:30,237 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:54:30,238 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 62, 62] total 124 [2023-11-29 00:54:30,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166232186] [2023-11-29 00:54:30,238 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:54:30,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2023-11-29 00:54:30,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:54:30,239 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2023-11-29 00:54:30,240 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1970, Invalid=13530, Unknown=0, NotChecked=0, Total=15500 [2023-11-29 00:54:30,240 INFO L87 Difference]: Start difference. First operand 240 states and 270 transitions. Second operand has 125 states, 124 states have (on average 3.4193548387096775) internal successors, (424), 125 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:54:34,402 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:54:34,402 INFO L93 Difference]: Finished difference Result 251 states and 283 transitions. [2023-11-29 00:54:34,403 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-29 00:54:34,403 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 124 states have (on average 3.4193548387096775) internal successors, (424), 125 states have internal predecessors, (424), 0 states have call successors, (0), 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 210 [2023-11-29 00:54:34,403 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:54:34,404 INFO L225 Difference]: With dead ends: 251 [2023-11-29 00:54:34,404 INFO L226 Difference]: Without dead ends: 251 [2023-11-29 00:54:34,405 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 511 GetRequests, 326 SyntacticMatches, 30 SemanticMatches, 155 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11183 ImplicationChecksByTransitivity, 6.6s TimeCoverageRelationStatistics Valid=2684, Invalid=21808, Unknown=0, NotChecked=0, Total=24492 [2023-11-29 00:54:34,406 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 704 mSDsluCounter, 3409 mSDsCounter, 0 mSdLazyCounter, 7168 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 704 SdHoareTripleChecker+Valid, 3503 SdHoareTripleChecker+Invalid, 7169 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-29 00:54:34,406 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [704 Valid, 3503 Invalid, 7169 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7168 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-29 00:54:34,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2023-11-29 00:54:34,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 246. [2023-11-29 00:54:34,408 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 246 states, 245 states have (on average 1.1306122448979592) internal successors, (277), 245 states have internal predecessors, (277), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:54:34,408 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 246 states to 246 states and 277 transitions. [2023-11-29 00:54:34,408 INFO L78 Accepts]: Start accepts. Automaton has 246 states and 277 transitions. Word has length 210 [2023-11-29 00:54:34,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:54:34,409 INFO L495 AbstractCegarLoop]: Abstraction has 246 states and 277 transitions. [2023-11-29 00:54:34,409 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 124 states have (on average 3.4193548387096775) internal successors, (424), 125 states have internal predecessors, (424), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:54:34,409 INFO L276 IsEmpty]: Start isEmpty. Operand 246 states and 277 transitions. [2023-11-29 00:54:34,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-11-29 00:54:34,410 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:54:34,410 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:54:34,416 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-11-29 00:54:34,610 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-11-29 00:54:34,610 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:54:34,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:54:34,611 INFO L85 PathProgramCache]: Analyzing trace with hash -1370116854, now seen corresponding path program 50 times [2023-11-29 00:54:34,611 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:54:34,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089325835] [2023-11-29 00:54:34,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:54:34,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:54:34,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:54:38,429 INFO L134 CoverageAnalysis]: Checked inductivity of 3046 backedges. 117 proven. 2929 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:54:38,429 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:54:38,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089325835] [2023-11-29 00:54:38,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2089325835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:54:38,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649093236] [2023-11-29 00:54:38,429 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:54:38,429 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:54:38,430 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:54:38,430 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:54:38,432 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-29 00:54:38,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:54:38,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:54:38,723 INFO L262 TraceCheckSpWp]: Trace formula consists of 981 conjuncts, 169 conjunts are in the unsatisfiable core [2023-11-29 00:54:38,727 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:54:40,318 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-29 00:54:46,431 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 00:54:46,431 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-11-29 00:54:46,811 INFO L134 CoverageAnalysis]: Checked inductivity of 3046 backedges. 784 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:54:46,812 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:54:52,275 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:54:52,278 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-29 00:54:52,285 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 24 treesize of output 20 [2023-11-29 00:54:53,856 INFO L134 CoverageAnalysis]: Checked inductivity of 3046 backedges. 784 proven. 2262 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:54:53,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [649093236] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:54:53,857 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:54:53,857 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 163 [2023-11-29 00:54:53,857 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944658273] [2023-11-29 00:54:53,857 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:54:53,858 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2023-11-29 00:54:53,858 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:54:53,860 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2023-11-29 00:54:53,861 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1767, Invalid=24639, Unknown=0, NotChecked=0, Total=26406 [2023-11-29 00:54:53,861 INFO L87 Difference]: Start difference. First operand 246 states and 277 transitions. Second operand has 163 states, 163 states have (on average 3.558282208588957) internal successors, (580), 163 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:02,442 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 3.08s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:55:11,900 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.18s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:55:15,162 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.96s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:55:18,905 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.39s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:55:22,911 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 00:55:25,206 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:25,206 INFO L93 Difference]: Finished difference Result 439 states and 501 transitions. [2023-11-29 00:55:25,207 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-11-29 00:55:25,207 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 163 states have (on average 3.558282208588957) internal successors, (580), 163 states have internal predecessors, (580), 0 states have call successors, (0), 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 215 [2023-11-29 00:55:25,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:25,208 INFO L225 Difference]: With dead ends: 439 [2023-11-29 00:55:25,208 INFO L226 Difference]: Without dead ends: 261 [2023-11-29 00:55:25,210 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 564 GetRequests, 302 SyntacticMatches, 30 SemanticMatches, 232 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11580 ImplicationChecksByTransitivity, 24.1s TimeCoverageRelationStatistics Valid=3472, Invalid=51050, Unknown=0, NotChecked=0, Total=54522 [2023-11-29 00:55:25,210 INFO L413 NwaCegarLoop]: 96 mSDtfsCounter, 1276 mSDsluCounter, 6193 mSDsCounter, 0 mSdLazyCounter, 13655 mSolverCounterSat, 477 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 20.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1276 SdHoareTripleChecker+Valid, 6289 SdHoareTripleChecker+Invalid, 14134 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 477 IncrementalHoareTripleChecker+Valid, 13655 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 21.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:25,211 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1276 Valid, 6289 Invalid, 14134 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [477 Valid, 13655 Invalid, 2 Unknown, 0 Unchecked, 21.2s Time] [2023-11-29 00:55:25,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 261 states. [2023-11-29 00:55:25,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 261 to 254. [2023-11-29 00:55:25,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 254 states, 253 states have (on average 1.1304347826086956) internal successors, (286), 253 states have internal predecessors, (286), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:25,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 254 states to 254 states and 286 transitions. [2023-11-29 00:55:25,214 INFO L78 Accepts]: Start accepts. Automaton has 254 states and 286 transitions. Word has length 215 [2023-11-29 00:55:25,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:25,215 INFO L495 AbstractCegarLoop]: Abstraction has 254 states and 286 transitions. [2023-11-29 00:55:25,215 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 163 states have (on average 3.558282208588957) internal successors, (580), 163 states have internal predecessors, (580), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:25,215 INFO L276 IsEmpty]: Start isEmpty. Operand 254 states and 286 transitions. [2023-11-29 00:55:25,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 223 [2023-11-29 00:55:25,216 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:25,216 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:25,223 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-11-29 00:55:25,416 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2023-11-29 00:55:25,416 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:55:25,417 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:25,417 INFO L85 PathProgramCache]: Analyzing trace with hash 1747063748, now seen corresponding path program 51 times [2023-11-29 00:55:25,417 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:25,417 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1344883108] [2023-11-29 00:55:25,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:25,417 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:25,482 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:29,117 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 121 proven. 3135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:55:29,118 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:29,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1344883108] [2023-11-29 00:55:29,118 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1344883108] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:29,118 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90761365] [2023-11-29 00:55:29,118 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:55:29,118 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:29,118 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:29,119 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:29,120 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-29 00:55:34,222 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 32 check-sat command(s) [2023-11-29 00:55:34,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:55:34,234 INFO L262 TraceCheckSpWp]: Trace formula consists of 1012 conjuncts, 202 conjunts are in the unsatisfiable core [2023-11-29 00:55:34,238 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:36,114 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:55:36,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 121 proven. 3135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:55:36,352 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:36,532 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:55:36,533 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:55:36,752 INFO L134 CoverageAnalysis]: Checked inductivity of 3256 backedges. 121 proven. 3135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:55:36,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [90761365] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:55:36,753 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:55:36,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 67, 67] total 103 [2023-11-29 00:55:36,753 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87146214] [2023-11-29 00:55:36,753 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:55:36,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 103 states [2023-11-29 00:55:36,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:36,755 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 103 interpolants. [2023-11-29 00:55:36,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=251, Invalid=10255, Unknown=0, NotChecked=0, Total=10506 [2023-11-29 00:55:36,755 INFO L87 Difference]: Start difference. First operand 254 states and 286 transitions. Second operand has 103 states, 103 states have (on average 2.854368932038835) internal successors, (294), 103 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:45,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:55:45,333 INFO L93 Difference]: Finished difference Result 441 states and 503 transitions. [2023-11-29 00:55:45,333 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 98 states. [2023-11-29 00:55:45,333 INFO L78 Accepts]: Start accepts. Automaton has has 103 states, 103 states have (on average 2.854368932038835) internal successors, (294), 103 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 222 [2023-11-29 00:55:45,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:55:45,335 INFO L225 Difference]: With dead ends: 441 [2023-11-29 00:55:45,335 INFO L226 Difference]: Without dead ends: 257 [2023-11-29 00:55:45,336 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 572 GetRequests, 408 SyntacticMatches, 0 SemanticMatches, 164 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2707 ImplicationChecksByTransitivity, 6.9s TimeCoverageRelationStatistics Valid=641, Invalid=26749, Unknown=0, NotChecked=0, Total=27390 [2023-11-29 00:55:45,336 INFO L413 NwaCegarLoop]: 94 mSDtfsCounter, 247 mSDsluCounter, 7569 mSDsCounter, 0 mSdLazyCounter, 15563 mSolverCounterSat, 61 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 247 SdHoareTripleChecker+Valid, 7663 SdHoareTripleChecker+Invalid, 15624 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 61 IncrementalHoareTripleChecker+Valid, 15563 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.3s IncrementalHoareTripleChecker+Time [2023-11-29 00:55:45,336 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [247 Valid, 7663 Invalid, 15624 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [61 Valid, 15563 Invalid, 0 Unknown, 0 Unchecked, 5.3s Time] [2023-11-29 00:55:45,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 257 states. [2023-11-29 00:55:45,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 257 to 256. [2023-11-29 00:55:45,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 256 states, 255 states have (on average 1.1294117647058823) internal successors, (288), 255 states have internal predecessors, (288), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:45,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 256 states to 256 states and 288 transitions. [2023-11-29 00:55:45,339 INFO L78 Accepts]: Start accepts. Automaton has 256 states and 288 transitions. Word has length 222 [2023-11-29 00:55:45,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:55:45,340 INFO L495 AbstractCegarLoop]: Abstraction has 256 states and 288 transitions. [2023-11-29 00:55:45,340 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 103 states, 103 states have (on average 2.854368932038835) internal successors, (294), 103 states have internal predecessors, (294), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:55:45,340 INFO L276 IsEmpty]: Start isEmpty. Operand 256 states and 288 transitions. [2023-11-29 00:55:45,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 225 [2023-11-29 00:55:45,341 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:55:45,341 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 31, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:55:45,349 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2023-11-29 00:55:45,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:45,541 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:55:45,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:55:45,542 INFO L85 PathProgramCache]: Analyzing trace with hash 1019508941, now seen corresponding path program 52 times [2023-11-29 00:55:45,542 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:55:45,542 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273787520] [2023-11-29 00:55:45,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:55:45,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:55:45,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:55:48,831 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 841 proven. 2476 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:55:48,831 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:55:48,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273787520] [2023-11-29 00:55:48,831 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1273787520] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:55:48,831 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818156057] [2023-11-29 00:55:48,831 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:55:48,832 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:55:48,832 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:55:48,832 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:55:48,835 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-29 00:55:49,504 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:55:49,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:55:49,511 INFO L262 TraceCheckSpWp]: Trace formula consists of 1025 conjuncts, 175 conjunts are in the unsatisfiable core [2023-11-29 00:55:49,515 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:55:49,519 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 00:55:51,633 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 900 proven. 2417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:55:51,633 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:55:57,356 INFO L134 CoverageAnalysis]: Checked inductivity of 3317 backedges. 900 proven. 2417 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:55:57,356 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [818156057] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:55:57,356 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:55:57,357 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 162 [2023-11-29 00:55:57,357 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797347021] [2023-11-29 00:55:57,357 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:55:57,358 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 163 states [2023-11-29 00:55:57,358 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:55:57,360 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 163 interpolants. [2023-11-29 00:55:57,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3740, Invalid=22666, Unknown=0, NotChecked=0, Total=26406 [2023-11-29 00:55:57,361 INFO L87 Difference]: Start difference. First operand 256 states and 288 transitions. Second operand has 163 states, 162 states have (on average 3.191358024691358) internal successors, (517), 163 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:02,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:56:02,841 INFO L93 Difference]: Finished difference Result 267 states and 301 transitions. [2023-11-29 00:56:02,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-29 00:56:02,842 INFO L78 Accepts]: Start accepts. Automaton has has 163 states, 162 states have (on average 3.191358024691358) internal successors, (517), 163 states have internal predecessors, (517), 0 states have call successors, (0), 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 224 [2023-11-29 00:56:02,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:56:02,844 INFO L225 Difference]: With dead ends: 267 [2023-11-29 00:56:02,844 INFO L226 Difference]: Without dead ends: 267 [2023-11-29 00:56:02,846 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 546 GetRequests, 350 SyntacticMatches, 0 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13405 ImplicationChecksByTransitivity, 9.5s TimeCoverageRelationStatistics Valid=5689, Invalid=33317, Unknown=0, NotChecked=0, Total=39006 [2023-11-29 00:56:02,846 INFO L413 NwaCegarLoop]: 99 mSDtfsCounter, 2219 mSDsluCounter, 3709 mSDsCounter, 0 mSdLazyCounter, 8078 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2219 SdHoareTripleChecker+Valid, 3808 SdHoareTripleChecker+Invalid, 8084 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 8078 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:56:02,847 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2219 Valid, 3808 Invalid, 8084 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 8078 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-29 00:56:02,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-11-29 00:56:02,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 262. [2023-11-29 00:56:02,850 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 262 states, 261 states have (on average 1.1302681992337165) internal successors, (295), 261 states have internal predecessors, (295), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:02,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 262 states to 262 states and 295 transitions. [2023-11-29 00:56:02,850 INFO L78 Accepts]: Start accepts. Automaton has 262 states and 295 transitions. Word has length 224 [2023-11-29 00:56:02,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:56:02,850 INFO L495 AbstractCegarLoop]: Abstraction has 262 states and 295 transitions. [2023-11-29 00:56:02,851 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 163 states, 162 states have (on average 3.191358024691358) internal successors, (517), 163 states have internal predecessors, (517), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:02,851 INFO L276 IsEmpty]: Start isEmpty. Operand 262 states and 295 transitions. [2023-11-29 00:56:02,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 230 [2023-11-29 00:56:02,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:56:02,852 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:56:02,860 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-11-29 00:56:03,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:56:03,052 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:56:03,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:56:03,053 INFO L85 PathProgramCache]: Analyzing trace with hash 1075910296, now seen corresponding path program 53 times [2023-11-29 00:56:03,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:56:03,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216436663] [2023-11-29 00:56:03,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:56:03,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:56:03,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:56:07,252 INFO L134 CoverageAnalysis]: Checked inductivity of 3473 backedges. 125 proven. 3348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:56:07,252 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:56:07,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216436663] [2023-11-29 00:56:07,253 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216436663] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:56:07,253 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [471397529] [2023-11-29 00:56:07,253 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:56:07,253 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:56:07,253 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:56:07,254 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:56:07,254 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-29 00:56:15,009 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 33 check-sat command(s) [2023-11-29 00:56:15,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:56:15,025 INFO L262 TraceCheckSpWp]: Trace formula consists of 1043 conjuncts, 208 conjunts are in the unsatisfiable core [2023-11-29 00:56:15,029 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:56:16,986 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:56:17,224 INFO L134 CoverageAnalysis]: Checked inductivity of 3473 backedges. 125 proven. 3348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:56:17,224 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:56:17,419 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:56:17,421 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:56:17,640 INFO L134 CoverageAnalysis]: Checked inductivity of 3473 backedges. 125 proven. 3348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:56:17,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [471397529] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:56:17,640 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:56:17,640 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 106 [2023-11-29 00:56:17,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267371292] [2023-11-29 00:56:17,641 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:56:17,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2023-11-29 00:56:17,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:56:17,642 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2023-11-29 00:56:17,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=10872, Unknown=0, NotChecked=0, Total=11130 [2023-11-29 00:56:17,643 INFO L87 Difference]: Start difference. First operand 262 states and 295 transitions. Second operand has 106 states, 106 states have (on average 2.858490566037736) internal successors, (303), 106 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:26,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:56:26,797 INFO L93 Difference]: Finished difference Result 455 states and 519 transitions. [2023-11-29 00:56:26,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-11-29 00:56:26,798 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.858490566037736) internal successors, (303), 106 states have internal predecessors, (303), 0 states have call successors, (0), 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 229 [2023-11-29 00:56:26,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:56:26,799 INFO L225 Difference]: With dead ends: 455 [2023-11-29 00:56:26,799 INFO L226 Difference]: Without dead ends: 265 [2023-11-29 00:56:26,801 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 590 GetRequests, 421 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 7.4s TimeCoverageRelationStatistics Valid=660, Invalid=28410, Unknown=0, NotChecked=0, Total=29070 [2023-11-29 00:56:26,801 INFO L413 NwaCegarLoop]: 97 mSDtfsCounter, 692 mSDsluCounter, 8181 mSDsCounter, 0 mSdLazyCounter, 16792 mSolverCounterSat, 62 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 692 SdHoareTripleChecker+Valid, 8278 SdHoareTripleChecker+Invalid, 16854 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 62 IncrementalHoareTripleChecker+Valid, 16792 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:56:26,802 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [692 Valid, 8278 Invalid, 16854 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [62 Valid, 16792 Invalid, 0 Unknown, 0 Unchecked, 5.7s Time] [2023-11-29 00:56:26,802 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 265 states. [2023-11-29 00:56:26,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 265 to 264. [2023-11-29 00:56:26,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 264 states, 263 states have (on average 1.129277566539924) internal successors, (297), 263 states have internal predecessors, (297), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:26,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 264 states to 264 states and 297 transitions. [2023-11-29 00:56:26,806 INFO L78 Accepts]: Start accepts. Automaton has 264 states and 297 transitions. Word has length 229 [2023-11-29 00:56:26,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:56:26,806 INFO L495 AbstractCegarLoop]: Abstraction has 264 states and 297 transitions. [2023-11-29 00:56:26,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.858490566037736) internal successors, (303), 106 states have internal predecessors, (303), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:26,806 INFO L276 IsEmpty]: Start isEmpty. Operand 264 states and 297 transitions. [2023-11-29 00:56:26,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 232 [2023-11-29 00:56:26,807 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:56:26,807 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:56:26,817 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-11-29 00:56:27,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:56:27,008 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:56:27,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:56:27,008 INFO L85 PathProgramCache]: Analyzing trace with hash -824334993, now seen corresponding path program 54 times [2023-11-29 00:56:27,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:56:27,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [880509475] [2023-11-29 00:56:27,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:56:27,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:56:27,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:56:31,336 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 900 proven. 2636 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:56:31,336 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:56:31,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [880509475] [2023-11-29 00:56:31,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [880509475] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:56:31,336 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262361045] [2023-11-29 00:56:31,336 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:56:31,336 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:56:31,336 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:56:31,337 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:56:31,338 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2023-11-29 00:56:43,953 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2023-11-29 00:56:43,953 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:56:43,969 INFO L262 TraceCheckSpWp]: Trace formula consists of 1056 conjuncts, 144 conjunts are in the unsatisfiable core [2023-11-29 00:56:43,972 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:56:48,003 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 961 proven. 2575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:56:48,003 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:56:51,416 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-29 00:56:53,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3536 backedges. 961 proven. 2575 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:56:53,028 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1262361045] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:56:53,028 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:56:53,028 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 68, 68] total 168 [2023-11-29 00:56:53,028 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1394689626] [2023-11-29 00:56:53,028 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:56:53,029 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 169 states [2023-11-29 00:56:53,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:56:53,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 169 interpolants. [2023-11-29 00:56:53,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4537, Invalid=23855, Unknown=0, NotChecked=0, Total=28392 [2023-11-29 00:56:53,033 INFO L87 Difference]: Start difference. First operand 264 states and 297 transitions. Second operand has 169 states, 168 states have (on average 3.7023809523809526) internal successors, (622), 169 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:57,037 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:56:57,037 INFO L93 Difference]: Finished difference Result 275 states and 310 transitions. [2023-11-29 00:56:57,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-29 00:56:57,037 INFO L78 Accepts]: Start accepts. Automaton has has 169 states, 168 states have (on average 3.7023809523809526) internal successors, (622), 169 states have internal predecessors, (622), 0 states have call successors, (0), 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 231 [2023-11-29 00:56:57,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:56:57,038 INFO L225 Difference]: With dead ends: 275 [2023-11-29 00:56:57,038 INFO L226 Difference]: Without dead ends: 275 [2023-11-29 00:56:57,040 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 562 GetRequests, 327 SyntacticMatches, 33 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18819 ImplicationChecksByTransitivity, 12.2s TimeCoverageRelationStatistics Valid=5992, Invalid=35420, Unknown=0, NotChecked=0, Total=41412 [2023-11-29 00:56:57,040 INFO L413 NwaCegarLoop]: 102 mSDtfsCounter, 857 mSDsluCounter, 2658 mSDsCounter, 0 mSdLazyCounter, 4795 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 857 SdHoareTripleChecker+Valid, 2760 SdHoareTripleChecker+Invalid, 4796 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:56:57,041 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [857 Valid, 2760 Invalid, 4796 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4795 Invalid, 0 Unknown, 0 Unchecked, 2.0s Time] [2023-11-29 00:56:57,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 275 states. [2023-11-29 00:56:57,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 275 to 270. [2023-11-29 00:56:57,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 270 states, 269 states have (on average 1.1301115241635689) internal successors, (304), 269 states have internal predecessors, (304), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:57,043 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 270 states to 270 states and 304 transitions. [2023-11-29 00:56:57,043 INFO L78 Accepts]: Start accepts. Automaton has 270 states and 304 transitions. Word has length 231 [2023-11-29 00:56:57,043 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:56:57,043 INFO L495 AbstractCegarLoop]: Abstraction has 270 states and 304 transitions. [2023-11-29 00:56:57,044 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 169 states, 168 states have (on average 3.7023809523809526) internal successors, (622), 169 states have internal predecessors, (622), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:56:57,044 INFO L276 IsEmpty]: Start isEmpty. Operand 270 states and 304 transitions. [2023-11-29 00:56:57,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 237 [2023-11-29 00:56:57,045 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:56:57,045 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:56:57,054 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2023-11-29 00:56:57,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,56 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:56:57,245 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:56:57,245 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:56:57,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1062502198, now seen corresponding path program 55 times [2023-11-29 00:56:57,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:56:57,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [82155500] [2023-11-29 00:56:57,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:56:57,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:56:57,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:57:01,462 INFO L134 CoverageAnalysis]: Checked inductivity of 3697 backedges. 129 proven. 3568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:57:01,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:57:01,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [82155500] [2023-11-29 00:57:01,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [82155500] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:57:01,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [507966756] [2023-11-29 00:57:01,462 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:57:01,462 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:57:01,462 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:57:01,463 INFO L229 MonitoredProcess]: Starting monitored process 57 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:57:01,464 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2023-11-29 00:57:01,806 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:57:01,814 INFO L262 TraceCheckSpWp]: Trace formula consists of 1074 conjuncts, 214 conjunts are in the unsatisfiable core [2023-11-29 00:57:01,818 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:57:03,874 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:57:04,116 INFO L134 CoverageAnalysis]: Checked inductivity of 3697 backedges. 129 proven. 3568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:57:04,116 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:57:04,299 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:57:04,301 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:57:04,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3697 backedges. 129 proven. 3568 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:57:04,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [507966756] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:57:04,541 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:57:04,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 109 [2023-11-29 00:57:04,541 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1706965090] [2023-11-29 00:57:04,541 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:57:04,542 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 109 states [2023-11-29 00:57:04,542 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:57:04,543 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 109 interpolants. [2023-11-29 00:57:04,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=265, Invalid=11507, Unknown=0, NotChecked=0, Total=11772 [2023-11-29 00:57:04,544 INFO L87 Difference]: Start difference. First operand 270 states and 304 transitions. Second operand has 109 states, 109 states have (on average 2.8623853211009176) internal successors, (312), 109 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:57:13,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:57:13,685 INFO L93 Difference]: Finished difference Result 469 states and 535 transitions. [2023-11-29 00:57:13,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 104 states. [2023-11-29 00:57:13,685 INFO L78 Accepts]: Start accepts. Automaton has has 109 states, 109 states have (on average 2.8623853211009176) internal successors, (312), 109 states have internal predecessors, (312), 0 states have call successors, (0), 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 236 [2023-11-29 00:57:13,685 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:57:13,686 INFO L225 Difference]: With dead ends: 469 [2023-11-29 00:57:13,686 INFO L226 Difference]: Without dead ends: 273 [2023-11-29 00:57:13,687 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 608 GetRequests, 434 SyntacticMatches, 0 SemanticMatches, 174 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3046 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=679, Invalid=30121, Unknown=0, NotChecked=0, Total=30800 [2023-11-29 00:57:13,688 INFO L413 NwaCegarLoop]: 100 mSDtfsCounter, 489 mSDsluCounter, 7948 mSDsCounter, 0 mSdLazyCounter, 16299 mSolverCounterSat, 65 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 489 SdHoareTripleChecker+Valid, 8048 SdHoareTripleChecker+Invalid, 16364 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 65 IncrementalHoareTripleChecker+Valid, 16299 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.5s IncrementalHoareTripleChecker+Time [2023-11-29 00:57:13,688 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [489 Valid, 8048 Invalid, 16364 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [65 Valid, 16299 Invalid, 0 Unknown, 0 Unchecked, 5.5s Time] [2023-11-29 00:57:13,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 273 states. [2023-11-29 00:57:13,690 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 273 to 272. [2023-11-29 00:57:13,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 272 states, 271 states have (on average 1.1291512915129152) internal successors, (306), 271 states have internal predecessors, (306), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:57:13,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 272 states to 272 states and 306 transitions. [2023-11-29 00:57:13,691 INFO L78 Accepts]: Start accepts. Automaton has 272 states and 306 transitions. Word has length 236 [2023-11-29 00:57:13,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:57:13,691 INFO L495 AbstractCegarLoop]: Abstraction has 272 states and 306 transitions. [2023-11-29 00:57:13,691 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 109 states, 109 states have (on average 2.8623853211009176) internal successors, (312), 109 states have internal predecessors, (312), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:57:13,691 INFO L276 IsEmpty]: Start isEmpty. Operand 272 states and 306 transitions. [2023-11-29 00:57:13,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 239 [2023-11-29 00:57:13,692 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:57:13,692 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 33, 33, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:57:13,699 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2023-11-29 00:57:13,892 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 57 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2023-11-29 00:57:13,893 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:57:13,893 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:57:13,893 INFO L85 PathProgramCache]: Analyzing trace with hash 169402495, now seen corresponding path program 56 times [2023-11-29 00:57:13,893 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:57:13,893 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1596840135] [2023-11-29 00:57:13,893 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:57:13,893 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:57:13,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:57:18,372 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 961 proven. 2801 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:57:18,372 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:57:18,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1596840135] [2023-11-29 00:57:18,372 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1596840135] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:57:18,372 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [671475598] [2023-11-29 00:57:18,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:57:18,372 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:57:18,372 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:57:18,373 INFO L229 MonitoredProcess]: Starting monitored process 58 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:57:18,374 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2023-11-29 00:57:18,690 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:57:18,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:57:18,697 INFO L262 TraceCheckSpWp]: Trace formula consists of 1087 conjuncts, 180 conjunts are in the unsatisfiable core [2023-11-29 00:57:18,700 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:57:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 1024 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:57:20,973 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:57:23,877 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:57:25,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3762 backedges. 1024 proven. 2738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:57:25,525 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [671475598] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:57:25,525 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:57:25,526 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 70, 70] total 140 [2023-11-29 00:57:25,526 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719073750] [2023-11-29 00:57:25,526 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:57:25,526 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 141 states [2023-11-29 00:57:25,526 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:57:25,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 141 interpolants. [2023-11-29 00:57:25,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2502, Invalid=17238, Unknown=0, NotChecked=0, Total=19740 [2023-11-29 00:57:25,528 INFO L87 Difference]: Start difference. First operand 272 states and 306 transitions. Second operand has 141 states, 140 states have (on average 3.4285714285714284) internal successors, (480), 141 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:57:31,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:57:31,453 INFO L93 Difference]: Finished difference Result 283 states and 319 transitions. [2023-11-29 00:57:31,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 72 states. [2023-11-29 00:57:31,453 INFO L78 Accepts]: Start accepts. Automaton has has 141 states, 140 states have (on average 3.4285714285714284) internal successors, (480), 141 states have internal predecessors, (480), 0 states have call successors, (0), 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 238 [2023-11-29 00:57:31,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:57:31,454 INFO L225 Difference]: With dead ends: 283 [2023-11-29 00:57:31,454 INFO L226 Difference]: Without dead ends: 283 [2023-11-29 00:57:31,456 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 579 GetRequests, 370 SyntacticMatches, 34 SemanticMatches, 175 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14377 ImplicationChecksByTransitivity, 9.9s TimeCoverageRelationStatistics Valid=3378, Invalid=27774, Unknown=0, NotChecked=0, Total=31152 [2023-11-29 00:57:31,456 INFO L413 NwaCegarLoop]: 105 mSDtfsCounter, 1014 mSDsluCounter, 4178 mSDsCounter, 0 mSdLazyCounter, 8837 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1014 SdHoareTripleChecker+Valid, 4283 SdHoareTripleChecker+Invalid, 8838 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8837 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-29 00:57:31,456 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1014 Valid, 4283 Invalid, 8838 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8837 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-29 00:57:31,456 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2023-11-29 00:57:31,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 278. [2023-11-29 00:57:31,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 278 states, 277 states have (on average 1.1299638989169676) internal successors, (313), 277 states have internal predecessors, (313), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:57:31,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 278 states to 278 states and 313 transitions. [2023-11-29 00:57:31,460 INFO L78 Accepts]: Start accepts. Automaton has 278 states and 313 transitions. Word has length 238 [2023-11-29 00:57:31,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:57:31,460 INFO L495 AbstractCegarLoop]: Abstraction has 278 states and 313 transitions. [2023-11-29 00:57:31,460 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 141 states, 140 states have (on average 3.4285714285714284) internal successors, (480), 141 states have internal predecessors, (480), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:57:31,460 INFO L276 IsEmpty]: Start isEmpty. Operand 278 states and 313 transitions. [2023-11-29 00:57:31,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 244 [2023-11-29 00:57:31,461 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:57:31,461 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:57:31,468 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2023-11-29 00:57:31,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 58 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2023-11-29 00:57:31,661 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:57:31,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:57:31,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1707889114, now seen corresponding path program 57 times [2023-11-29 00:57:31,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:57:31,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [590729779] [2023-11-29 00:57:31,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:57:31,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:57:31,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:57:36,000 INFO L134 CoverageAnalysis]: Checked inductivity of 3928 backedges. 133 proven. 3795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:57:36,000 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:57:36,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [590729779] [2023-11-29 00:57:36,000 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [590729779] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:57:36,000 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1043063799] [2023-11-29 00:57:36,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:57:36,000 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:57:36,001 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:57:36,001 INFO L229 MonitoredProcess]: Starting monitored process 59 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:57:36,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2023-11-29 00:57:43,994 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2023-11-29 00:57:43,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:57:44,008 INFO L262 TraceCheckSpWp]: Trace formula consists of 1105 conjuncts, 226 conjunts are in the unsatisfiable core [2023-11-29 00:57:44,012 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:57:44,223 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 11 treesize of output 7 [2023-11-29 00:57:47,136 INFO L134 CoverageAnalysis]: Checked inductivity of 3928 backedges. 133 proven. 3795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:57:47,136 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:57:47,409 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:57:47,410 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:57:50,060 INFO L134 CoverageAnalysis]: Checked inductivity of 3928 backedges. 133 proven. 3795 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:57:50,060 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1043063799] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:57:50,060 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:57:50,060 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 145 [2023-11-29 00:57:50,060 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004996498] [2023-11-29 00:57:50,060 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:57:50,061 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 145 states [2023-11-29 00:57:50,061 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:57:50,062 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 145 interpolants. [2023-11-29 00:57:50,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=373, Invalid=20507, Unknown=0, NotChecked=0, Total=20880 [2023-11-29 00:57:50,063 INFO L87 Difference]: Start difference. First operand 278 states and 313 transitions. Second operand has 145 states, 145 states have (on average 3.331034482758621) internal successors, (483), 145 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:58:00,942 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:58:00,942 INFO L93 Difference]: Finished difference Result 483 states and 551 transitions. [2023-11-29 00:58:00,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-11-29 00:58:00,942 INFO L78 Accepts]: Start accepts. Automaton has has 145 states, 145 states have (on average 3.331034482758621) internal successors, (483), 145 states have internal predecessors, (483), 0 states have call successors, (0), 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 243 [2023-11-29 00:58:00,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:58:00,944 INFO L225 Difference]: With dead ends: 483 [2023-11-29 00:58:00,944 INFO L226 Difference]: Without dead ends: 281 [2023-11-29 00:58:00,945 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 625 GetRequests, 414 SyntacticMatches, 0 SemanticMatches, 211 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7318 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=823, Invalid=44333, Unknown=0, NotChecked=0, Total=45156 [2023-11-29 00:58:00,946 INFO L413 NwaCegarLoop]: 103 mSDtfsCounter, 752 mSDsluCounter, 10183 mSDsCounter, 0 mSdLazyCounter, 20874 mSolverCounterSat, 83 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 752 SdHoareTripleChecker+Valid, 10286 SdHoareTripleChecker+Invalid, 20957 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 83 IncrementalHoareTripleChecker+Valid, 20874 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:58:00,946 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [752 Valid, 10286 Invalid, 20957 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [83 Valid, 20874 Invalid, 0 Unknown, 0 Unchecked, 7.0s Time] [2023-11-29 00:58:00,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-11-29 00:58:00,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 280. [2023-11-29 00:58:00,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 280 states, 279 states have (on average 1.1290322580645162) internal successors, (315), 279 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 00:58:00,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 280 states to 280 states and 315 transitions. [2023-11-29 00:58:00,948 INFO L78 Accepts]: Start accepts. Automaton has 280 states and 315 transitions. Word has length 243 [2023-11-29 00:58:00,949 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:58:00,949 INFO L495 AbstractCegarLoop]: Abstraction has 280 states and 315 transitions. [2023-11-29 00:58:00,949 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 145 states, 145 states have (on average 3.331034482758621) internal successors, (483), 145 states have internal predecessors, (483), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:58:00,949 INFO L276 IsEmpty]: Start isEmpty. Operand 280 states and 315 transitions. [2023-11-29 00:58:00,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 246 [2023-11-29 00:58:00,950 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:58:00,950 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:58:00,959 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2023-11-29 00:58:01,150 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2023-11-29 00:58:01,150 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:58:01,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:58:01,151 INFO L85 PathProgramCache]: Analyzing trace with hash -601491267, now seen corresponding path program 58 times [2023-11-29 00:58:01,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:58:01,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595411738] [2023-11-29 00:58:01,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:58:01,151 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:58:01,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:58:05,830 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 1024 proven. 2971 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:58:05,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:58:05,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595411738] [2023-11-29 00:58:05,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595411738] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:58:05,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113737735] [2023-11-29 00:58:05,830 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 00:58:05,830 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:58:05,830 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:58:05,831 INFO L229 MonitoredProcess]: Starting monitored process 60 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:58:05,832 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2023-11-29 00:58:07,529 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 00:58:07,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:58:07,539 INFO L262 TraceCheckSpWp]: Trace formula consists of 1118 conjuncts, 190 conjunts are in the unsatisfiable core [2023-11-29 00:58:07,543 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:58:07,548 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 00:58:10,118 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 1089 proven. 2906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:58:10,118 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:58:17,297 INFO L134 CoverageAnalysis]: Checked inductivity of 3995 backedges. 1089 proven. 2906 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:58:17,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [113737735] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:58:17,298 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:58:17,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 177 [2023-11-29 00:58:17,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721224564] [2023-11-29 00:58:17,298 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:58:17,299 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 178 states [2023-11-29 00:58:17,299 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:58:17,301 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2023-11-29 00:58:17,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4457, Invalid=27049, Unknown=0, NotChecked=0, Total=31506 [2023-11-29 00:58:17,303 INFO L87 Difference]: Start difference. First operand 280 states and 315 transitions. Second operand has 178 states, 177 states have (on average 3.1920903954802258) internal successors, (565), 178 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:58:24,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:58:24,410 INFO L93 Difference]: Finished difference Result 291 states and 328 transitions. [2023-11-29 00:58:24,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-11-29 00:58:24,411 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 177 states have (on average 3.1920903954802258) internal successors, (565), 178 states have internal predecessors, (565), 0 states have call successors, (0), 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 245 [2023-11-29 00:58:24,411 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:58:24,412 INFO L225 Difference]: With dead ends: 291 [2023-11-29 00:58:24,412 INFO L226 Difference]: Without dead ends: 291 [2023-11-29 00:58:24,414 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 597 GetRequests, 383 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16081 ImplicationChecksByTransitivity, 13.3s TimeCoverageRelationStatistics Valid=6745, Invalid=39695, Unknown=0, NotChecked=0, Total=46440 [2023-11-29 00:58:24,414 INFO L413 NwaCegarLoop]: 108 mSDtfsCounter, 2513 mSDsluCounter, 4262 mSDsCounter, 0 mSdLazyCounter, 9038 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 2513 SdHoareTripleChecker+Valid, 4370 SdHoareTripleChecker+Invalid, 9044 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 9038 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.0s IncrementalHoareTripleChecker+Time [2023-11-29 00:58:24,414 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [2513 Valid, 4370 Invalid, 9044 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 9038 Invalid, 0 Unknown, 0 Unchecked, 4.0s Time] [2023-11-29 00:58:24,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2023-11-29 00:58:24,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 286. [2023-11-29 00:58:24,417 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 286 states, 285 states have (on average 1.1298245614035087) internal successors, (322), 285 states have internal predecessors, (322), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:58:24,417 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 286 states to 286 states and 322 transitions. [2023-11-29 00:58:24,417 INFO L78 Accepts]: Start accepts. Automaton has 286 states and 322 transitions. Word has length 245 [2023-11-29 00:58:24,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:58:24,417 INFO L495 AbstractCegarLoop]: Abstraction has 286 states and 322 transitions. [2023-11-29 00:58:24,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 178 states, 177 states have (on average 3.1920903954802258) internal successors, (565), 178 states have internal predecessors, (565), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:58:24,417 INFO L276 IsEmpty]: Start isEmpty. Operand 286 states and 322 transitions. [2023-11-29 00:58:24,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 251 [2023-11-29 00:58:24,418 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:58:24,418 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 35, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:58:24,427 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Ended with exit code 0 [2023-11-29 00:58:24,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,60 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:58:24,619 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:58:24,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:58:24,619 INFO L85 PathProgramCache]: Analyzing trace with hash 1717701800, now seen corresponding path program 59 times [2023-11-29 00:58:24,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:58:24,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855421788] [2023-11-29 00:58:24,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:58:24,619 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:58:24,710 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:58:29,393 INFO L134 CoverageAnalysis]: Checked inductivity of 4166 backedges. 137 proven. 4029 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:58:29,394 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:58:29,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855421788] [2023-11-29 00:58:29,394 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1855421788] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:58:29,394 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1280094798] [2023-11-29 00:58:29,394 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 00:58:29,394 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:58:29,394 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:58:29,395 INFO L229 MonitoredProcess]: Starting monitored process 61 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:58:29,396 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2023-11-29 00:58:31,234 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2023-11-29 00:58:31,235 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:58:31,245 INFO L262 TraceCheckSpWp]: Trace formula consists of 1136 conjuncts, 226 conjunts are in the unsatisfiable core [2023-11-29 00:58:31,249 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:58:33,460 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:58:33,723 INFO L134 CoverageAnalysis]: Checked inductivity of 4166 backedges. 137 proven. 4029 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:58:33,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:58:33,922 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:58:33,923 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:58:34,178 INFO L134 CoverageAnalysis]: Checked inductivity of 4166 backedges. 137 proven. 4029 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:58:34,178 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1280094798] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:58:34,178 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:58:34,178 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 75, 75] total 115 [2023-11-29 00:58:34,178 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354235377] [2023-11-29 00:58:34,178 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:58:34,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 115 states [2023-11-29 00:58:34,179 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:58:34,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 115 interpolants. [2023-11-29 00:58:34,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=279, Invalid=12831, Unknown=0, NotChecked=0, Total=13110 [2023-11-29 00:58:34,180 INFO L87 Difference]: Start difference. First operand 286 states and 322 transitions. Second operand has 115 states, 115 states have (on average 2.869565217391304) internal successors, (330), 115 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:58:44,408 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:58:44,408 INFO L93 Difference]: Finished difference Result 497 states and 567 transitions. [2023-11-29 00:58:44,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 110 states. [2023-11-29 00:58:44,408 INFO L78 Accepts]: Start accepts. Automaton has has 115 states, 115 states have (on average 2.869565217391304) internal successors, (330), 115 states have internal predecessors, (330), 0 states have call successors, (0), 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 250 [2023-11-29 00:58:44,408 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:58:44,409 INFO L225 Difference]: With dead ends: 497 [2023-11-29 00:58:44,409 INFO L226 Difference]: Without dead ends: 289 [2023-11-29 00:58:44,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 644 GetRequests, 460 SyntacticMatches, 0 SemanticMatches, 184 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3405 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=717, Invalid=33693, Unknown=0, NotChecked=0, Total=34410 [2023-11-29 00:58:44,411 INFO L413 NwaCegarLoop]: 106 mSDtfsCounter, 519 mSDsluCounter, 9058 mSDsCounter, 0 mSdLazyCounter, 18580 mSolverCounterSat, 68 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 519 SdHoareTripleChecker+Valid, 9164 SdHoareTripleChecker+Invalid, 18648 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 68 IncrementalHoareTripleChecker+Valid, 18580 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 6.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:58:44,411 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [519 Valid, 9164 Invalid, 18648 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [68 Valid, 18580 Invalid, 0 Unknown, 0 Unchecked, 6.2s Time] [2023-11-29 00:58:44,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 289 states. [2023-11-29 00:58:44,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 289 to 288. [2023-11-29 00:58:44,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 288 states, 287 states have (on average 1.1289198606271778) internal successors, (324), 287 states have internal predecessors, (324), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:58:44,414 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 288 states to 288 states and 324 transitions. [2023-11-29 00:58:44,414 INFO L78 Accepts]: Start accepts. Automaton has 288 states and 324 transitions. Word has length 250 [2023-11-29 00:58:44,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:58:44,414 INFO L495 AbstractCegarLoop]: Abstraction has 288 states and 324 transitions. [2023-11-29 00:58:44,414 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 115 states, 115 states have (on average 2.869565217391304) internal successors, (330), 115 states have internal predecessors, (330), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:58:44,414 INFO L276 IsEmpty]: Start isEmpty. Operand 288 states and 324 transitions. [2023-11-29 00:58:44,415 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 253 [2023-11-29 00:58:44,415 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:58:44,415 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 35, 35, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:58:44,424 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2023-11-29 00:58:44,616 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,61 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:58:44,616 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:58:44,616 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:58:44,616 INFO L85 PathProgramCache]: Analyzing trace with hash -856032719, now seen corresponding path program 60 times [2023-11-29 00:58:44,616 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:58:44,616 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144575891] [2023-11-29 00:58:44,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:58:44,617 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:58:44,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:58:48,821 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 1089 proven. 3146 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:58:48,821 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:58:48,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144575891] [2023-11-29 00:58:48,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1144575891] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:58:48,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1930908581] [2023-11-29 00:58:48,822 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 00:58:48,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:58:48,822 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:58:48,823 INFO L229 MonitoredProcess]: Starting monitored process 62 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:58:48,823 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2023-11-29 00:58:58,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 36 check-sat command(s) [2023-11-29 00:58:58,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:58:58,347 INFO L262 TraceCheckSpWp]: Trace formula consists of 1149 conjuncts, 154 conjunts are in the unsatisfiable core [2023-11-29 00:58:58,351 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:59:02,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 1156 proven. 3079 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:59:02,587 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:59:06,140 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 7 treesize of output 5 [2023-11-29 00:59:07,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4235 backedges. 1156 proven. 3079 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:59:07,762 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1930908581] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:59:07,762 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:59:07,762 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 74, 74] total 183 [2023-11-29 00:59:07,762 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390215392] [2023-11-29 00:59:07,762 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:59:07,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 184 states [2023-11-29 00:59:07,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:59:07,765 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 184 interpolants. [2023-11-29 00:59:07,766 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5380, Invalid=28292, Unknown=0, NotChecked=0, Total=33672 [2023-11-29 00:59:07,766 INFO L87 Difference]: Start difference. First operand 288 states and 324 transitions. Second operand has 184 states, 183 states have (on average 3.710382513661202) internal successors, (679), 184 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:59:11,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:59:11,588 INFO L93 Difference]: Finished difference Result 299 states and 337 transitions. [2023-11-29 00:59:11,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-29 00:59:11,588 INFO L78 Accepts]: Start accepts. Automaton has has 184 states, 183 states have (on average 3.710382513661202) internal successors, (679), 184 states have internal predecessors, (679), 0 states have call successors, (0), 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 252 [2023-11-29 00:59:11,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:59:11,589 INFO L225 Difference]: With dead ends: 299 [2023-11-29 00:59:11,589 INFO L226 Difference]: Without dead ends: 299 [2023-11-29 00:59:11,592 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 613 GetRequests, 357 SyntacticMatches, 36 SemanticMatches, 220 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22422 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=7075, Invalid=41987, Unknown=0, NotChecked=0, Total=49062 [2023-11-29 00:59:11,592 INFO L413 NwaCegarLoop]: 112 mSDtfsCounter, 987 mSDsluCounter, 3078 mSDsCounter, 0 mSdLazyCounter, 5408 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 3190 SdHoareTripleChecker+Invalid, 5409 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5408 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 00:59:11,592 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [987 Valid, 3190 Invalid, 5409 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5408 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 00:59:11,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 299 states. [2023-11-29 00:59:11,594 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 299 to 294. [2023-11-29 00:59:11,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 294 states, 293 states have (on average 1.129692832764505) internal successors, (331), 293 states have internal predecessors, (331), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:59:11,595 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 294 states to 294 states and 331 transitions. [2023-11-29 00:59:11,595 INFO L78 Accepts]: Start accepts. Automaton has 294 states and 331 transitions. Word has length 252 [2023-11-29 00:59:11,595 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:59:11,595 INFO L495 AbstractCegarLoop]: Abstraction has 294 states and 331 transitions. [2023-11-29 00:59:11,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 184 states, 183 states have (on average 3.710382513661202) internal successors, (679), 184 states have internal predecessors, (679), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:59:11,595 INFO L276 IsEmpty]: Start isEmpty. Operand 294 states and 331 transitions. [2023-11-29 00:59:11,596 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 258 [2023-11-29 00:59:11,596 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:59:11,596 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 36, 36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:59:11,607 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2023-11-29 00:59:11,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,62 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:59:11,797 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:59:11,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:59:11,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1423496116, now seen corresponding path program 61 times [2023-11-29 00:59:11,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:59:11,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110322804] [2023-11-29 00:59:11,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:59:11,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:59:11,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:59:16,599 INFO L134 CoverageAnalysis]: Checked inductivity of 4411 backedges. 141 proven. 4270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:59:16,599 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:59:16,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110322804] [2023-11-29 00:59:16,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [110322804] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:59:16,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1838066314] [2023-11-29 00:59:16,599 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 00:59:16,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:59:16,600 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:59:16,600 INFO L229 MonitoredProcess]: Starting monitored process 63 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:59:16,601 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2023-11-29 00:59:16,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:59:17,005 INFO L262 TraceCheckSpWp]: Trace formula consists of 1167 conjuncts, 232 conjunts are in the unsatisfiable core [2023-11-29 00:59:17,009 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:59:19,529 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 9 [2023-11-29 00:59:19,815 INFO L134 CoverageAnalysis]: Checked inductivity of 4411 backedges. 141 proven. 4270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:59:19,816 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:59:20,021 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 13 [2023-11-29 00:59:20,022 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 16 treesize of output 12 [2023-11-29 00:59:20,259 INFO L134 CoverageAnalysis]: Checked inductivity of 4411 backedges. 141 proven. 4270 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:59:20,259 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1838066314] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:59:20,259 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:59:20,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [77, 77, 77] total 118 [2023-11-29 00:59:20,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2070469848] [2023-11-29 00:59:20,260 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:59:20,261 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2023-11-29 00:59:20,261 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:59:20,262 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2023-11-29 00:59:20,263 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=286, Invalid=13520, Unknown=0, NotChecked=0, Total=13806 [2023-11-29 00:59:20,263 INFO L87 Difference]: Start difference. First operand 294 states and 331 transitions. Second operand has 118 states, 118 states have (on average 2.8728813559322033) internal successors, (339), 118 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:59:31,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:59:31,663 INFO L93 Difference]: Finished difference Result 511 states and 583 transitions. [2023-11-29 00:59:31,663 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 113 states. [2023-11-29 00:59:31,663 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.8728813559322033) internal successors, (339), 118 states have internal predecessors, (339), 0 states have call successors, (0), 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 257 [2023-11-29 00:59:31,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:59:31,665 INFO L225 Difference]: With dead ends: 511 [2023-11-29 00:59:31,665 INFO L226 Difference]: Without dead ends: 297 [2023-11-29 00:59:31,666 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 662 GetRequests, 473 SyntacticMatches, 0 SemanticMatches, 189 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3592 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=736, Invalid=35554, Unknown=0, NotChecked=0, Total=36290 [2023-11-29 00:59:31,666 INFO L413 NwaCegarLoop]: 109 mSDtfsCounter, 781 mSDsluCounter, 10390 mSDsCounter, 0 mSdLazyCounter, 21260 mSolverCounterSat, 70 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 6.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 781 SdHoareTripleChecker+Valid, 10499 SdHoareTripleChecker+Invalid, 21330 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 70 IncrementalHoareTripleChecker+Valid, 21260 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 7.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:59:31,666 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [781 Valid, 10499 Invalid, 21330 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [70 Valid, 21260 Invalid, 0 Unknown, 0 Unchecked, 7.2s Time] [2023-11-29 00:59:31,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2023-11-29 00:59:31,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 296. [2023-11-29 00:59:31,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 296 states, 295 states have (on average 1.1288135593220339) internal successors, (333), 295 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 00:59:31,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 296 states to 296 states and 333 transitions. [2023-11-29 00:59:31,669 INFO L78 Accepts]: Start accepts. Automaton has 296 states and 333 transitions. Word has length 257 [2023-11-29 00:59:31,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:59:31,669 INFO L495 AbstractCegarLoop]: Abstraction has 296 states and 333 transitions. [2023-11-29 00:59:31,669 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.8728813559322033) internal successors, (339), 118 states have internal predecessors, (339), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:59:31,669 INFO L276 IsEmpty]: Start isEmpty. Operand 296 states and 333 transitions. [2023-11-29 00:59:31,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 260 [2023-11-29 00:59:31,670 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:59:31,670 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 36, 36, 36, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:59:31,677 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Ended with exit code 0 [2023-11-29 00:59:31,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,63 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:59:31,871 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:59:31,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:59:31,871 INFO L85 PathProgramCache]: Analyzing trace with hash -1267906037, now seen corresponding path program 62 times [2023-11-29 00:59:31,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:59:31,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1775892078] [2023-11-29 00:59:31,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:59:31,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:59:31,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:59:36,270 INFO L134 CoverageAnalysis]: Checked inductivity of 4482 backedges. 1156 proven. 3326 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:59:36,270 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:59:36,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1775892078] [2023-11-29 00:59:36,270 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1775892078] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:59:36,270 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104498866] [2023-11-29 00:59:36,270 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 00:59:36,270 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:59:36,270 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:59:36,271 INFO L229 MonitoredProcess]: Starting monitored process 64 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:59:36,283 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2023-11-29 00:59:36,642 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 00:59:36,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 00:59:36,649 INFO L262 TraceCheckSpWp]: Trace formula consists of 1180 conjuncts, 195 conjunts are in the unsatisfiable core [2023-11-29 00:59:36,653 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 00:59:38,994 INFO L134 CoverageAnalysis]: Checked inductivity of 4482 backedges. 1225 proven. 3257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:59:38,995 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 00:59:42,024 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 5 treesize of output 3 [2023-11-29 00:59:43,739 INFO L134 CoverageAnalysis]: Checked inductivity of 4482 backedges. 1225 proven. 3257 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:59:43,739 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1104498866] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 00:59:43,739 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 00:59:43,740 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 76, 76] total 152 [2023-11-29 00:59:43,740 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528708161] [2023-11-29 00:59:43,740 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 00:59:43,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 153 states [2023-11-29 00:59:43,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 00:59:43,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 153 interpolants. [2023-11-29 00:59:43,744 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2943, Invalid=20313, Unknown=0, NotChecked=0, Total=23256 [2023-11-29 00:59:43,744 INFO L87 Difference]: Start difference. First operand 296 states and 333 transitions. Second operand has 153 states, 152 states have (on average 3.4342105263157894) internal successors, (522), 153 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:59:49,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 00:59:49,789 INFO L93 Difference]: Finished difference Result 307 states and 346 transitions. [2023-11-29 00:59:49,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 78 states. [2023-11-29 00:59:49,790 INFO L78 Accepts]: Start accepts. Automaton has has 153 states, 152 states have (on average 3.4342105263157894) internal successors, (522), 153 states have internal predecessors, (522), 0 states have call successors, (0), 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 259 [2023-11-29 00:59:49,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 00:59:49,791 INFO L225 Difference]: With dead ends: 307 [2023-11-29 00:59:49,791 INFO L226 Difference]: Without dead ends: 307 [2023-11-29 00:59:49,792 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 630 GetRequests, 403 SyntacticMatches, 37 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17035 ImplicationChecksByTransitivity, 9.3s TimeCoverageRelationStatistics Valid=3951, Invalid=32721, Unknown=0, NotChecked=0, Total=36672 [2023-11-29 00:59:49,792 INFO L413 NwaCegarLoop]: 115 mSDtfsCounter, 1037 mSDsluCounter, 5212 mSDsCounter, 0 mSdLazyCounter, 10925 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1037 SdHoareTripleChecker+Valid, 5327 SdHoareTripleChecker+Invalid, 10926 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 10925 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.2s IncrementalHoareTripleChecker+Time [2023-11-29 00:59:49,792 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1037 Valid, 5327 Invalid, 10926 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 10925 Invalid, 0 Unknown, 0 Unchecked, 4.2s Time] [2023-11-29 00:59:49,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 307 states. [2023-11-29 00:59:49,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 307 to 302. [2023-11-29 00:59:49,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 302 states, 301 states have (on average 1.1295681063122924) internal successors, (340), 301 states have internal predecessors, (340), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:59:49,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 302 states to 302 states and 340 transitions. [2023-11-29 00:59:49,795 INFO L78 Accepts]: Start accepts. Automaton has 302 states and 340 transitions. Word has length 259 [2023-11-29 00:59:49,795 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 00:59:49,795 INFO L495 AbstractCegarLoop]: Abstraction has 302 states and 340 transitions. [2023-11-29 00:59:49,795 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 153 states, 152 states have (on average 3.4342105263157894) internal successors, (522), 153 states have internal predecessors, (522), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 00:59:49,795 INFO L276 IsEmpty]: Start isEmpty. Operand 302 states and 340 transitions. [2023-11-29 00:59:49,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 265 [2023-11-29 00:59:49,796 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 00:59:49,796 INFO L195 NwaCegarLoop]: trace histogram [37, 37, 37, 37, 37, 36, 36, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 00:59:49,802 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Ended with exit code 0 [2023-11-29 00:59:49,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,64 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:59:49,997 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 00:59:49,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 00:59:49,997 INFO L85 PathProgramCache]: Analyzing trace with hash 1612667930, now seen corresponding path program 63 times [2023-11-29 00:59:49,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 00:59:49,997 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1530860471] [2023-11-29 00:59:49,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 00:59:49,997 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 00:59:50,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 00:59:55,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4663 backedges. 145 proven. 4518 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 00:59:55,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 00:59:55,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1530860471] [2023-11-29 00:59:55,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1530860471] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 00:59:55,061 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1042473879] [2023-11-29 00:59:55,061 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 00:59:55,061 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 00:59:55,061 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 00:59:55,062 INFO L229 MonitoredProcess]: Starting monitored process 65 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 00:59:55,063 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_1625b507-dfc9-4393-8c4d-d260075a50fe/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (65)] Waiting until timeout for monitored process [2023-11-29 01:00:06,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 38 check-sat command(s) [2023-11-29 01:00:06,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 01:00:06,964 INFO L262 TraceCheckSpWp]: Trace formula consists of 1198 conjuncts, 168 conjunts are in the unsatisfiable core [2023-11-29 01:00:06,970 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 01:00:09,351 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10