./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/array-memsafety/cstrchr-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_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/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_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/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_7478c25e-55a0-4039-80d8-9ec066b8bb09/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 71679b2a85162a2bf4315b62ab1893b5cfd06e20fc9e264973bd31bc9d08e300 --- Real Ultimate output --- This is Ultimate 0.2.4-dev-0e0057c [2023-11-29 02:05:46,278 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-29 02:05:46,339 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-29 02:05:46,343 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-29 02:05:46,344 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-29 02:05:46,365 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-29 02:05:46,365 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-29 02:05:46,365 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-29 02:05:46,366 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2023-11-29 02:05:46,367 INFO L153 SettingsManager]: * Use memory slicer=true [2023-11-29 02:05:46,367 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-29 02:05:46,368 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-29 02:05:46,369 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-29 02:05:46,369 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-29 02:05:46,370 INFO L153 SettingsManager]: * Use SBE=true [2023-11-29 02:05:46,370 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-29 02:05:46,371 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-29 02:05:46,371 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-29 02:05:46,372 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-29 02:05:46,372 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-29 02:05:46,373 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-29 02:05:46,373 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-29 02:05:46,374 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-29 02:05:46,374 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-29 02:05:46,374 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-29 02:05:46,374 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-29 02:05:46,375 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-29 02:05:46,375 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-29 02:05:46,376 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-29 02:05:46,376 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-29 02:05:46,376 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-29 02:05:46,377 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-29 02:05:46,377 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:05:46,377 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-29 02:05:46,378 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-29 02:05:46,378 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-29 02:05:46,378 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-29 02:05:46,378 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-29 02:05:46,378 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-29 02:05:46,378 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-29 02:05:46,379 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-29 02:05:46,379 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_7478c25e-55a0-4039-80d8-9ec066b8bb09/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 71679b2a85162a2bf4315b62ab1893b5cfd06e20fc9e264973bd31bc9d08e300 [2023-11-29 02:05:46,570 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-29 02:05:46,590 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-29 02:05:46,592 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-29 02:05:46,593 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-29 02:05:46,594 INFO L274 PluginConnector]: CDTParser initialized [2023-11-29 02:05:46,595 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/../../sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2023-11-29 02:05:49,375 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-29 02:05:49,591 INFO L384 CDTParser]: Found 1 translation units. [2023-11-29 02:05:49,592 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/sv-benchmarks/c/array-memsafety/cstrchr-alloca-2.i [2023-11-29 02:05:49,606 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/data/cf7fef05e/f74e7217af764d73a78d92a4be30abc3/FLAGba807602a [2023-11-29 02:05:49,620 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/data/cf7fef05e/f74e7217af764d73a78d92a4be30abc3 [2023-11-29 02:05:49,622 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-29 02:05:49,623 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-29 02:05:49,624 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-29 02:05:49,625 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-29 02:05:49,629 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-29 02:05:49,630 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:05:49" (1/1) ... [2023-11-29 02:05:49,631 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@ce6290f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:05:49, skipping insertion in model container [2023-11-29 02:05:49,631 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 29.11 02:05:49" (1/1) ... [2023-11-29 02:05:49,673 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-29 02:05:49,924 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:05:49,936 INFO L202 MainTranslator]: Completed pre-run [2023-11-29 02:05:49,974 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-29 02:05:50,005 INFO L206 MainTranslator]: Completed translation [2023-11-29 02:05:50,005 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:05:50 WrapperNode [2023-11-29 02:05:50,005 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-29 02:05:50,007 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-29 02:05:50,007 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-29 02:05:50,007 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-29 02:05:50,014 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:05:50" (1/1) ... [2023-11-29 02:05:50,027 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:05:50" (1/1) ... [2023-11-29 02:05:50,049 INFO L138 Inliner]: procedures = 117, calls = 11, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 61 [2023-11-29 02:05:50,049 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-29 02:05:50,050 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-29 02:05:50,050 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-29 02:05:50,050 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-29 02:05:50,060 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:05:50" (1/1) ... [2023-11-29 02:05:50,060 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:05:50" (1/1) ... [2023-11-29 02:05:50,062 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:05:50" (1/1) ... [2023-11-29 02:05:50,073 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 2 writes are split as follows [2]. [2023-11-29 02:05:50,073 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:05:50" (1/1) ... [2023-11-29 02:05:50,073 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:05:50" (1/1) ... [2023-11-29 02:05:50,078 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:05:50" (1/1) ... [2023-11-29 02:05:50,081 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:05:50" (1/1) ... [2023-11-29 02:05:50,082 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:05:50" (1/1) ... [2023-11-29 02:05:50,082 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:05:50" (1/1) ... [2023-11-29 02:05:50,084 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-29 02:05:50,085 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-29 02:05:50,085 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-29 02:05:50,085 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-29 02:05:50,086 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:05:50" (1/1) ... [2023-11-29 02:05:50,090 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2023-11-29 02:05:50,101 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:05:50,113 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2023-11-29 02:05:50,117 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2023-11-29 02:05:50,146 INFO L130 BoogieDeclarations]: Found specification of procedure read~int#0 [2023-11-29 02:05:50,147 INFO L130 BoogieDeclarations]: Found specification of procedure write~int#0 [2023-11-29 02:05:50,147 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-29 02:05:50,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-29 02:05:50,147 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-29 02:05:50,147 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-29 02:05:50,249 INFO L241 CfgBuilder]: Building ICFG [2023-11-29 02:05:50,251 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-29 02:05:50,404 INFO L282 CfgBuilder]: Performing block encoding [2023-11-29 02:05:50,444 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-29 02:05:50,444 INFO L309 CfgBuilder]: Removed 2 assume(true) statements. [2023-11-29 02:05:50,445 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:05:50 BoogieIcfgContainer [2023-11-29 02:05:50,445 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-29 02:05:50,448 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-29 02:05:50,448 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-29 02:05:50,451 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-29 02:05:50,451 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 29.11 02:05:49" (1/3) ... [2023-11-29 02:05:50,452 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7809409f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:05:50, skipping insertion in model container [2023-11-29 02:05:50,452 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 29.11 02:05:50" (2/3) ... [2023-11-29 02:05:50,453 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@7809409f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 29.11 02:05:50, skipping insertion in model container [2023-11-29 02:05:50,453 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 29.11 02:05:50" (3/3) ... [2023-11-29 02:05:50,454 INFO L112 eAbstractionObserver]: Analyzing ICFG cstrchr-alloca-2.i [2023-11-29 02:05:50,496 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-29 02:05:50,497 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 11 error locations. [2023-11-29 02:05:50,541 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-29 02:05:50,547 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;@2eaa4590, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-29 02:05:50,548 INFO L358 AbstractCegarLoop]: Starting to check reachability of 11 error locations. [2023-11-29 02:05:50,551 INFO L276 IsEmpty]: Start isEmpty. Operand has 25 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:50,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 02:05:50,556 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:50,557 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:05:50,558 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 02:05:50,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:50,563 INFO L85 PathProgramCache]: Analyzing trace with hash 92510250, now seen corresponding path program 1 times [2023-11-29 02:05:50,573 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:50,573 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [631782286] [2023-11-29 02:05:50,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:50,574 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:50,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:50,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:50,783 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:50,783 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [631782286] [2023-11-29 02:05:50,784 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [631782286] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:05:50,784 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:05:50,784 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:05:50,786 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [222507046] [2023-11-29 02:05:50,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:05:50,791 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:05:50,791 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:50,812 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:05:50,813 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:05:50,814 INFO L87 Difference]: Start difference. First operand has 25 states, 13 states have (on average 2.3076923076923075) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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 02:05:50,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:50,870 INFO L93 Difference]: Finished difference Result 44 states and 49 transitions. [2023-11-29 02:05:50,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:05:50,872 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 02:05:50,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:50,879 INFO L225 Difference]: With dead ends: 44 [2023-11-29 02:05:50,879 INFO L226 Difference]: Without dead ends: 43 [2023-11-29 02:05:50,880 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 02:05:50,883 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 20 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 45 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 29 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:05:50,884 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 45 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:05:50,896 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-29 02:05:50,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 26. [2023-11-29 02:05:50,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 15 states have (on average 1.9333333333333333) 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 02:05:50,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 29 transitions. [2023-11-29 02:05:50,911 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 29 transitions. Word has length 5 [2023-11-29 02:05:50,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:50,912 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 29 transitions. [2023-11-29 02:05:50,912 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 02:05:50,912 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 29 transitions. [2023-11-29 02:05:50,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 02:05:50,913 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:50,913 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:05:50,913 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-29 02:05:50,913 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 02:05:50,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:50,914 INFO L85 PathProgramCache]: Analyzing trace with hash 92569832, now seen corresponding path program 1 times [2023-11-29 02:05:50,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:50,915 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535615417] [2023-11-29 02:05:50,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:50,915 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:50,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:50,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:50,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:50,985 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535615417] [2023-11-29 02:05:50,985 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [535615417] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:05:50,985 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:05:50,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:05:50,986 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673555760] [2023-11-29 02:05:50,986 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:05:50,987 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:05:50,987 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:50,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:05:50,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:05:50,988 INFO L87 Difference]: Start difference. First operand 26 states and 29 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 02:05:51,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:51,012 INFO L93 Difference]: Finished difference Result 24 states and 27 transitions. [2023-11-29 02:05:51,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:05:51,013 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 02:05:51,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:51,013 INFO L225 Difference]: With dead ends: 24 [2023-11-29 02:05:51,013 INFO L226 Difference]: Without dead ends: 24 [2023-11-29 02:05:51,014 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:05:51,015 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 18 mSDsluCounter, 2 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 18 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:05:51,016 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [18 Valid, 16 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:05:51,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 24 states. [2023-11-29 02:05:51,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 24 to 24. [2023-11-29 02:05:51,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 15 states have (on average 1.8) internal successors, (27), 23 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:51,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 27 transitions. [2023-11-29 02:05:51,020 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 27 transitions. Word has length 5 [2023-11-29 02:05:51,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:51,021 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 27 transitions. [2023-11-29 02:05:51,021 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 02:05:51,021 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 27 transitions. [2023-11-29 02:05:51,022 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-29 02:05:51,022 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:51,022 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-29 02:05:51,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-29 02:05:51,023 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 02:05:51,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:51,023 INFO L85 PathProgramCache]: Analyzing trace with hash 92569833, now seen corresponding path program 1 times [2023-11-29 02:05:51,024 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:51,024 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440441198] [2023-11-29 02:05:51,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:51,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:51,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:51,218 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:51,218 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:51,219 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440441198] [2023-11-29 02:05:51,219 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1440441198] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:05:51,219 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:05:51,219 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:05:51,219 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [796143442] [2023-11-29 02:05:51,219 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:05:51,220 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:05:51,220 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:51,220 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:05:51,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:05:51,221 INFO L87 Difference]: Start difference. First operand 24 states and 27 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 02:05:51,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:51,295 INFO L93 Difference]: Finished difference Result 27 states and 31 transitions. [2023-11-29 02:05:51,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:05:51,295 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 02:05:51,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:51,296 INFO L225 Difference]: With dead ends: 27 [2023-11-29 02:05:51,296 INFO L226 Difference]: Without dead ends: 27 [2023-11-29 02:05:51,297 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 02:05:51,298 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 25 mSDsluCounter, 16 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 29 SdHoareTripleChecker+Invalid, 46 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:05:51,299 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 29 Invalid, 46 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:05:51,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-29 02:05:51,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-11-29 02:05:51,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 25 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:51,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 30 transitions. [2023-11-29 02:05:51,302 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 30 transitions. Word has length 5 [2023-11-29 02:05:51,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:51,303 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 30 transitions. [2023-11-29 02:05:51,303 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 02:05:51,303 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 30 transitions. [2023-11-29 02:05:51,303 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 02:05:51,304 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:51,304 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 02:05:51,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-29 02:05:51,304 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 02:05:51,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:51,305 INFO L85 PathProgramCache]: Analyzing trace with hash -1427151190, now seen corresponding path program 1 times [2023-11-29 02:05:51,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:51,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [270228585] [2023-11-29 02:05:51,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:51,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:51,428 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:51,428 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:51,429 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [270228585] [2023-11-29 02:05:51,429 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [270228585] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:05:51,429 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:05:51,429 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:05:51,429 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686879156] [2023-11-29 02:05:51,429 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:05:51,430 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:05:51,430 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:51,431 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:05:51,431 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:05:51,431 INFO L87 Difference]: Start difference. First operand 26 states and 30 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 02:05:51,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:51,469 INFO L93 Difference]: Finished difference Result 41 states and 46 transitions. [2023-11-29 02:05:51,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:05:51,470 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 02:05:51,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:51,470 INFO L225 Difference]: With dead ends: 41 [2023-11-29 02:05:51,471 INFO L226 Difference]: Without dead ends: 41 [2023-11-29 02:05:51,471 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 02:05:51,472 INFO L413 NwaCegarLoop]: 14 mSDtfsCounter, 30 mSDsluCounter, 13 mSDsCounter, 0 mSdLazyCounter, 23 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 30 SdHoareTripleChecker+Valid, 27 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 02:05:51,473 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [30 Valid, 27 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 23 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:05:51,474 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 41 states. [2023-11-29 02:05:51,477 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 41 to 28. [2023-11-29 02:05:51,477 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 02:05:51,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-11-29 02:05:51,478 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 6 [2023-11-29 02:05:51,478 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:51,478 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-11-29 02:05:51,478 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 02:05:51,479 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-11-29 02:05:51,479 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-29 02:05:51,479 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:51,479 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-29 02:05:51,479 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-29 02:05:51,480 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 02:05:51,480 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:51,480 INFO L85 PathProgramCache]: Analyzing trace with hash -1425304148, now seen corresponding path program 1 times [2023-11-29 02:05:51,480 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:51,480 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840206886] [2023-11-29 02:05:51,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:51,481 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:51,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:51,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:51,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:51,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840206886] [2023-11-29 02:05:51,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1840206886] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:05:51,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:05:51,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:05:51,666 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1143412691] [2023-11-29 02:05:51,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:05:51,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:05:51,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:51,667 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:05:51,667 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:05:51,667 INFO L87 Difference]: Start difference. First operand 28 states and 32 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:51,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:51,724 INFO L93 Difference]: Finished difference Result 43 states and 48 transitions. [2023-11-29 02:05:51,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:05:51,724 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-29 02:05:51,725 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:51,725 INFO L225 Difference]: With dead ends: 43 [2023-11-29 02:05:51,725 INFO L226 Difference]: Without dead ends: 43 [2023-11-29 02:05:51,726 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:05:51,727 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 53 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 33 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:05:51,727 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 20 Invalid, 33 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:05:51,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2023-11-29 02:05:51,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 28. [2023-11-29 02:05:51,731 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 02:05:51,731 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 32 transitions. [2023-11-29 02:05:51,731 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 32 transitions. Word has length 6 [2023-11-29 02:05:51,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:51,732 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 32 transitions. [2023-11-29 02:05:51,732 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 5 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:51,732 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 32 transitions. [2023-11-29 02:05:51,732 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 02:05:51,732 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:51,733 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:51,733 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-29 02:05:51,733 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 02:05:51,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:51,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1292012622, now seen corresponding path program 1 times [2023-11-29 02:05:51,734 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:51,734 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1184784520] [2023-11-29 02:05:51,734 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:51,734 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:51,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:51,767 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:51,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:51,768 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1184784520] [2023-11-29 02:05:51,768 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1184784520] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:05:51,768 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:05:51,768 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:05:51,768 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805697269] [2023-11-29 02:05:51,768 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:05:51,769 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:05:51,769 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:51,769 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:05:51,769 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:05:51,770 INFO L87 Difference]: Start difference. First operand 28 states and 32 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 02:05:51,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:51,792 INFO L93 Difference]: Finished difference Result 25 states and 29 transitions. [2023-11-29 02:05:51,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:05:51,792 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 02:05:51,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:51,793 INFO L225 Difference]: With dead ends: 25 [2023-11-29 02:05:51,793 INFO L226 Difference]: Without dead ends: 25 [2023-11-29 02:05:51,794 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:05:51,795 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 8 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 8 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 18 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:05:51,795 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [8 Valid, 19 Invalid, 18 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:05:51,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-29 02:05:51,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-29 02:05:51,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 19 states have (on average 1.5263157894736843) internal successors, (29), 24 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:51,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 29 transitions. [2023-11-29 02:05:51,799 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 29 transitions. Word has length 7 [2023-11-29 02:05:51,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:51,800 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 29 transitions. [2023-11-29 02:05:51,800 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 02:05:51,800 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 29 transitions. [2023-11-29 02:05:51,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 02:05:51,801 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:51,801 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:51,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-29 02:05:51,801 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 02:05:51,802 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:51,802 INFO L85 PathProgramCache]: Analyzing trace with hash -1292012621, now seen corresponding path program 1 times [2023-11-29 02:05:51,802 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:51,802 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570123219] [2023-11-29 02:05:51,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:51,803 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:51,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:51,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:51,917 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:51,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570123219] [2023-11-29 02:05:51,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [570123219] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:05:51,917 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:05:51,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-29 02:05:51,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [31508001] [2023-11-29 02:05:51,918 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:05:51,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-29 02:05:51,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:51,918 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-29 02:05:51,919 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-29 02:05:51,919 INFO L87 Difference]: Start difference. First operand 25 states and 29 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 02:05:51,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:51,986 INFO L93 Difference]: Finished difference Result 30 states and 36 transitions. [2023-11-29 02:05:51,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:05:51,987 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 02:05:51,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:51,987 INFO L225 Difference]: With dead ends: 30 [2023-11-29 02:05:51,988 INFO L226 Difference]: Without dead ends: 30 [2023-11-29 02:05:51,988 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:05:51,989 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 51 mSDsluCounter, 7 mSDsCounter, 0 mSdLazyCounter, 32 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 51 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 35 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 32 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:05:51,989 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [51 Valid, 14 Invalid, 35 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 32 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:05:51,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 30 states. [2023-11-29 02:05:51,992 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 30 to 30. [2023-11-29 02:05:51,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 24 states have (on average 1.5) internal successors, (36), 29 states have internal predecessors, (36), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:51,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 36 transitions. [2023-11-29 02:05:51,993 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 36 transitions. Word has length 7 [2023-11-29 02:05:51,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:51,994 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 36 transitions. [2023-11-29 02:05:51,994 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 02:05:51,994 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 36 transitions. [2023-11-29 02:05:51,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-29 02:05:51,995 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:51,995 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1] [2023-11-29 02:05:51,995 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-29 02:05:51,995 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 02:05:51,996 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:51,996 INFO L85 PathProgramCache]: Analyzing trace with hash -1234650301, now seen corresponding path program 1 times [2023-11-29 02:05:51,996 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:51,996 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760483285] [2023-11-29 02:05:51,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:51,996 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:52,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:52,162 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:52,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:52,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760483285] [2023-11-29 02:05:52,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [760483285] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:05:52,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1793755840] [2023-11-29 02:05:52,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:52,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:05:52,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:05:52,166 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:05:52,177 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-29 02:05:52,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:52,238 INFO L262 TraceCheckSpWp]: Trace formula consists of 44 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-29 02:05:52,243 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:05:52,322 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-29 02:05:52,481 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 1 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:52,481 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:05:52,693 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:52,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1793755840] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:05:52,694 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:05:52,694 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 12 [2023-11-29 02:05:52,694 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [813636405] [2023-11-29 02:05:52,694 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:05:52,695 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:05:52,695 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:52,695 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:05:52,696 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:05:52,696 INFO L87 Difference]: Start difference. First operand 30 states and 36 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 02:05:52,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:52,925 INFO L93 Difference]: Finished difference Result 31 states and 38 transitions. [2023-11-29 02:05:52,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:05:52,926 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 02:05:52,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:52,926 INFO L225 Difference]: With dead ends: 31 [2023-11-29 02:05:52,926 INFO L226 Difference]: Without dead ends: 31 [2023-11-29 02:05:52,927 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2023-11-29 02:05:52,928 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 39 mSDsluCounter, 25 mSDsCounter, 0 mSdLazyCounter, 103 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 106 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 103 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:05:52,928 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 36 Invalid, 106 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 103 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:05:52,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-29 02:05:52,930 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 28. [2023-11-29 02:05:52,931 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 28 states, 23 states have (on average 1.4782608695652173) internal successors, (34), 27 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 02:05:52,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 28 states to 28 states and 34 transitions. [2023-11-29 02:05:52,931 INFO L78 Accepts]: Start accepts. Automaton has 28 states and 34 transitions. Word has length 7 [2023-11-29 02:05:52,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:52,932 INFO L495 AbstractCegarLoop]: Abstraction has 28 states and 34 transitions. [2023-11-29 02:05:52,932 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 02:05:52,932 INFO L276 IsEmpty]: Start isEmpty. Operand 28 states and 34 transitions. [2023-11-29 02:05:52,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-29 02:05:52,932 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:52,933 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:52,939 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-29 02:05:53,133 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:05:53,133 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 02:05:53,134 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:53,134 INFO L85 PathProgramCache]: Analyzing trace with hash 380544658, now seen corresponding path program 1 times [2023-11-29 02:05:53,134 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:53,134 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [163798042] [2023-11-29 02:05:53,134 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:53,134 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:53,143 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:53,311 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:53,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:53,312 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [163798042] [2023-11-29 02:05:53,312 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [163798042] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:05:53,312 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:05:53,312 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-29 02:05:53,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48204099] [2023-11-29 02:05:53,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:05:53,312 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:05:53,313 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:53,313 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:05:53,313 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:05:53,313 INFO L87 Difference]: Start difference. First operand 28 states and 34 transitions. Second operand has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:53,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:53,347 INFO L93 Difference]: Finished difference Result 27 states and 33 transitions. [2023-11-29 02:05:53,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-29 02:05:53,348 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-29 02:05:53,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:53,348 INFO L225 Difference]: With dead ends: 27 [2023-11-29 02:05:53,348 INFO L226 Difference]: Without dead ends: 27 [2023-11-29 02:05:53,349 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:05:53,349 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 25 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 21 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 25 SdHoareTripleChecker+Valid, 8 SdHoareTripleChecker+Invalid, 23 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 21 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:05:53,350 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [25 Valid, 8 Invalid, 23 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 21 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:05:53,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-29 02:05:53,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 24. [2023-11-29 02:05:53,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 20 states have (on average 1.45) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:53,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 29 transitions. [2023-11-29 02:05:53,352 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 29 transitions. Word has length 8 [2023-11-29 02:05:53,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:53,353 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 29 transitions. [2023-11-29 02:05:53,353 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 5 states have (on average 1.6) internal successors, (8), 6 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:53,353 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 29 transitions. [2023-11-29 02:05:53,353 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2023-11-29 02:05:53,353 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:53,353 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:53,353 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-29 02:05:53,354 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 02:05:53,354 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:53,354 INFO L85 PathProgramCache]: Analyzing trace with hash 1150005066, now seen corresponding path program 1 times [2023-11-29 02:05:53,354 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:53,354 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183214846] [2023-11-29 02:05:53,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:53,355 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:53,363 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:53,374 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:53,374 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:53,374 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183214846] [2023-11-29 02:05:53,375 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183214846] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:05:53,375 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:05:53,375 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-29 02:05:53,375 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1287059755] [2023-11-29 02:05:53,375 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:05:53,375 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-29 02:05:53,375 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:53,376 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-29 02:05:53,376 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:05:53,376 INFO L87 Difference]: Start difference. First operand 24 states and 29 transitions. Second operand has 3 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 02:05:53,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:53,391 INFO L93 Difference]: Finished difference Result 26 states and 31 transitions. [2023-11-29 02:05:53,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-29 02:05:53,392 INFO L78 Accepts]: Start accepts. Automaton has has 3 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 02:05:53,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:53,392 INFO L225 Difference]: With dead ends: 26 [2023-11-29 02:05:53,393 INFO L226 Difference]: Without dead ends: 26 [2023-11-29 02:05:53,393 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-29 02:05:53,394 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 0 mSDsluCounter, 10 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 23 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 02:05:53,394 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 23 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:05:53,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 26 states. [2023-11-29 02:05:53,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 26 to 26. [2023-11-29 02:05:53,396 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 02:05:53,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 31 transitions. [2023-11-29 02:05:53,397 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 31 transitions. Word has length 10 [2023-11-29 02:05:53,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:53,397 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 31 transitions. [2023-11-29 02:05:53,397 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 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 02:05:53,397 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 31 transitions. [2023-11-29 02:05:53,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 02:05:53,398 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:53,398 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:53,398 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-29 02:05:53,398 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr10ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 8 more)] === [2023-11-29 02:05:53,398 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:53,399 INFO L85 PathProgramCache]: Analyzing trace with hash 1290417999, now seen corresponding path program 1 times [2023-11-29 02:05:53,399 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:53,399 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1500619918] [2023-11-29 02:05:53,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:53,399 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:53,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:53,470 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:53,470 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:53,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1500619918] [2023-11-29 02:05:53,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1500619918] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:05:53,470 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:05:53,470 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-29 02:05:53,471 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808753922] [2023-11-29 02:05:53,471 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:05:53,471 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-29 02:05:53,471 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:53,471 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-29 02:05:53,472 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:05:53,472 INFO L87 Difference]: Start difference. First operand 26 states and 31 transitions. Second operand has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:53,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:53,487 INFO L93 Difference]: Finished difference Result 25 states and 30 transitions. [2023-11-29 02:05:53,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-29 02:05:53,488 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-29 02:05:53,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:53,488 INFO L225 Difference]: With dead ends: 25 [2023-11-29 02:05:53,488 INFO L226 Difference]: Without dead ends: 22 [2023-11-29 02:05:53,488 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-29 02:05:53,489 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 9 mSDsluCounter, 12 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 24 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:05:53,489 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 24 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:05:53,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-29 02:05:53,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 22. [2023-11-29 02:05:53,491 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 02:05:53,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 22 states to 22 states and 25 transitions. [2023-11-29 02:05:53,492 INFO L78 Accepts]: Start accepts. Automaton has 22 states and 25 transitions. Word has length 11 [2023-11-29 02:05:53,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:53,492 INFO L495 AbstractCegarLoop]: Abstraction has 22 states and 25 transitions. [2023-11-29 02:05:53,492 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.6666666666666665) internal successors, (11), 3 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:53,492 INFO L276 IsEmpty]: Start isEmpty. Operand 22 states and 25 transitions. [2023-11-29 02:05:53,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 02:05:53,493 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:53,493 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:53,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-29 02:05:53,493 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 02:05:53,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:53,494 INFO L85 PathProgramCache]: Analyzing trace with hash 1290259686, now seen corresponding path program 1 times [2023-11-29 02:05:53,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:53,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366779992] [2023-11-29 02:05:53,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:53,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:53,505 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:53,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:53,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366779992] [2023-11-29 02:05:53,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1366779992] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:05:53,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:05:53,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-29 02:05:53,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407469567] [2023-11-29 02:05:53,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:05:53,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-29 02:05:53,631 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:53,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-29 02:05:53,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2023-11-29 02:05:53,632 INFO L87 Difference]: Start difference. First operand 22 states and 25 transitions. Second operand has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:53,688 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:53,688 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2023-11-29 02:05:53,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-29 02:05:53,689 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-29 02:05:53,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:53,689 INFO L225 Difference]: With dead ends: 26 [2023-11-29 02:05:53,689 INFO L226 Difference]: Without dead ends: 20 [2023-11-29 02:05:53,689 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 02:05:53,690 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 5 mSDsluCounter, 20 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:05:53,700 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 30 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:05:53,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 20 states. [2023-11-29 02:05:53,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 20 to 20. [2023-11-29 02:05:53,702 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 20 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 19 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:53,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 20 states to 20 states and 22 transitions. [2023-11-29 02:05:53,702 INFO L78 Accepts]: Start accepts. Automaton has 20 states and 22 transitions. Word has length 11 [2023-11-29 02:05:53,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:53,702 INFO L495 AbstractCegarLoop]: Abstraction has 20 states and 22 transitions. [2023-11-29 02:05:53,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:53,703 INFO L276 IsEmpty]: Start isEmpty. Operand 20 states and 22 transitions. [2023-11-29 02:05:53,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-29 02:05:53,703 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:53,703 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:53,703 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-29 02:05:53,703 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 02:05:53,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:53,704 INFO L85 PathProgramCache]: Analyzing trace with hash 897232676, now seen corresponding path program 1 times [2023-11-29 02:05:53,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:53,704 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [846337458] [2023-11-29 02:05:53,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:53,704 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:53,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:53,863 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:53,863 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:53,863 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [846337458] [2023-11-29 02:05:53,863 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [846337458] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-29 02:05:53,863 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-29 02:05:53,863 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2023-11-29 02:05:53,864 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1317806806] [2023-11-29 02:05:53,864 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-29 02:05:53,864 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2023-11-29 02:05:53,864 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:53,865 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2023-11-29 02:05:53,865 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2023-11-29 02:05:53,865 INFO L87 Difference]: Start difference. First operand 20 states and 22 transitions. Second operand has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:53,935 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:53,935 INFO L93 Difference]: Finished difference Result 26 states and 28 transitions. [2023-11-29 02:05:53,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-29 02:05:53,935 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-29 02:05:53,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:53,936 INFO L225 Difference]: With dead ends: 26 [2023-11-29 02:05:53,936 INFO L226 Difference]: Without dead ends: 22 [2023-11-29 02:05:53,936 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2023-11-29 02:05:53,937 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 21 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 53 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 21 SdHoareTripleChecker+Valid, 30 SdHoareTripleChecker+Invalid, 54 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 53 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:05:53,937 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [21 Valid, 30 Invalid, 54 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 53 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-29 02:05:53,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-29 02:05:53,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 21. [2023-11-29 02:05:53,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 21 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 20 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:53,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 21 states to 21 states and 23 transitions. [2023-11-29 02:05:53,939 INFO L78 Accepts]: Start accepts. Automaton has 21 states and 23 transitions. Word has length 11 [2023-11-29 02:05:53,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:53,940 INFO L495 AbstractCegarLoop]: Abstraction has 21 states and 23 transitions. [2023-11-29 02:05:53,940 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 1.5714285714285714) internal successors, (11), 7 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:53,940 INFO L276 IsEmpty]: Start isEmpty. Operand 21 states and 23 transitions. [2023-11-29 02:05:53,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-29 02:05:53,940 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:53,940 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:53,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-29 02:05:53,941 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 02:05:53,941 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:53,941 INFO L85 PathProgramCache]: Analyzing trace with hash 1841053182, now seen corresponding path program 1 times [2023-11-29 02:05:53,941 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:53,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496836090] [2023-11-29 02:05:53,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:53,942 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:53,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:54,163 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:54,163 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:54,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496836090] [2023-11-29 02:05:54,163 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496836090] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:05:54,163 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [320068130] [2023-11-29 02:05:54,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:54,164 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:05:54,164 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:05:54,165 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:05:54,167 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-29 02:05:54,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:54,229 INFO L262 TraceCheckSpWp]: Trace formula consists of 85 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-29 02:05:54,231 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:05:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:54,309 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:05:54,394 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 02:05:54,424 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:54,424 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [320068130] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:05:54,424 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:05:54,424 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6, 6] total 13 [2023-11-29 02:05:54,424 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1330011248] [2023-11-29 02:05:54,424 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:05:54,425 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-29 02:05:54,425 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:54,425 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-29 02:05:54,425 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2023-11-29 02:05:54,426 INFO L87 Difference]: Start difference. First operand 21 states and 23 transitions. Second operand has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:54,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:54,586 INFO L93 Difference]: Finished difference Result 26 states and 29 transitions. [2023-11-29 02:05:54,587 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-29 02:05:54,587 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 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) Word has length 13 [2023-11-29 02:05:54,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:54,587 INFO L225 Difference]: With dead ends: 26 [2023-11-29 02:05:54,587 INFO L226 Difference]: Without dead ends: 22 [2023-11-29 02:05:54,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 16 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 02:05:54,588 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 49 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 107 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 49 SdHoareTripleChecker+Valid, 42 SdHoareTripleChecker+Invalid, 114 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 107 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:05:54,589 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [49 Valid, 42 Invalid, 114 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 107 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:05:54,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 22 states. [2023-11-29 02:05:54,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 22 to 18. [2023-11-29 02:05:54,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 18 states, 17 states have (on average 1.1176470588235294) internal successors, (19), 17 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:54,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 18 states to 18 states and 19 transitions. [2023-11-29 02:05:54,591 INFO L78 Accepts]: Start accepts. Automaton has 18 states and 19 transitions. Word has length 13 [2023-11-29 02:05:54,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:54,591 INFO L495 AbstractCegarLoop]: Abstraction has 18 states and 19 transitions. [2023-11-29 02:05:54,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.230769230769231) internal successors, (29), 14 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:54,591 INFO L276 IsEmpty]: Start isEmpty. Operand 18 states and 19 transitions. [2023-11-29 02:05:54,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-29 02:05:54,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:54,592 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:54,597 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-29 02:05:54,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2023-11-29 02:05:54,797 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 02:05:54,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:54,798 INFO L85 PathProgramCache]: Analyzing trace with hash -1689093711, now seen corresponding path program 2 times [2023-11-29 02:05:54,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:54,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [703784501] [2023-11-29 02:05:54,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:54,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:54,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:55,105 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 4 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:55,105 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:55,105 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [703784501] [2023-11-29 02:05:55,105 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [703784501] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:05:55,106 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30228924] [2023-11-29 02:05:55,106 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:05:55,106 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:05:55,106 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:05:55,107 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:05:55,110 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-29 02:05:55,176 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:05:55,177 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:05:55,178 INFO L262 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 27 conjunts are in the unsatisfiable core [2023-11-29 02:05:55,180 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:05:55,226 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 02:05:55,449 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:05:55,449 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 32 treesize of output 29 [2023-11-29 02:05:55,572 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:55,573 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:05:55,865 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 02:05:55,874 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 02:05:55,886 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 02:05:55,917 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:55,917 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30228924] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:05:55,917 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:05:55,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9, 9] total 23 [2023-11-29 02:05:55,918 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9112810] [2023-11-29 02:05:55,918 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:05:55,918 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 23 states [2023-11-29 02:05:55,918 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:55,919 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2023-11-29 02:05:55,920 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=430, Unknown=0, NotChecked=0, Total=506 [2023-11-29 02:05:55,920 INFO L87 Difference]: Start difference. First operand 18 states and 19 transitions. Second operand has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:56,524 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:56,524 INFO L93 Difference]: Finished difference Result 36 states and 37 transitions. [2023-11-29 02:05:56,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-29 02:05:56,524 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 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 17 [2023-11-29 02:05:56,525 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:56,525 INFO L225 Difference]: With dead ends: 36 [2023-11-29 02:05:56,525 INFO L226 Difference]: Without dead ends: 28 [2023-11-29 02:05:56,526 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 2 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 258 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=220, Invalid=1186, Unknown=0, NotChecked=0, Total=1406 [2023-11-29 02:05:56,526 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 42 mSDsluCounter, 35 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 41 SdHoareTripleChecker+Invalid, 208 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:05:56,527 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 41 Invalid, 208 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:05:56,527 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 28 states. [2023-11-29 02:05:56,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 28 to 24. [2023-11-29 02:05:56,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 24 states, 23 states have (on average 1.0869565217391304) internal successors, (25), 23 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 02:05:56,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 24 states to 24 states and 25 transitions. [2023-11-29 02:05:56,529 INFO L78 Accepts]: Start accepts. Automaton has 24 states and 25 transitions. Word has length 17 [2023-11-29 02:05:56,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:56,529 INFO L495 AbstractCegarLoop]: Abstraction has 24 states and 25 transitions. [2023-11-29 02:05:56,530 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 23 states, 23 states have (on average 1.826086956521739) internal successors, (42), 23 states have internal predecessors, (42), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:56,530 INFO L276 IsEmpty]: Start isEmpty. Operand 24 states and 25 transitions. [2023-11-29 02:05:56,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-29 02:05:56,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:56,530 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:56,536 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Ended with exit code 0 [2023-11-29 02:05:56,732 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-29 02:05:56,733 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 02:05:56,733 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:56,733 INFO L85 PathProgramCache]: Analyzing trace with hash -1743394242, now seen corresponding path program 3 times [2023-11-29 02:05:56,733 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:56,733 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [168611827] [2023-11-29 02:05:56,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:56,733 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:56,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:57,062 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:57,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:57,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [168611827] [2023-11-29 02:05:57,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [168611827] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:05:57,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417553992] [2023-11-29 02:05:57,063 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:05:57,063 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:05:57,063 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:05:57,064 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:05:57,068 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-29 02:05:57,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2023-11-29 02:05:57,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:05:57,186 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 31 conjunts are in the unsatisfiable core [2023-11-29 02:05:57,188 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:05:57,279 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 02:05:57,318 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:57,319 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:05:57,348 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 02:05:57,351 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 02:05:57,410 INFO L134 CoverageAnalysis]: Checked inductivity of 19 backedges. 7 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:57,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1417553992] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:05:57,410 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:05:57,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11, 11] total 19 [2023-11-29 02:05:57,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891152028] [2023-11-29 02:05:57,410 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:05:57,411 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-29 02:05:57,411 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:57,411 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-29 02:05:57,412 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=287, Unknown=0, NotChecked=0, Total=342 [2023-11-29 02:05:57,412 INFO L87 Difference]: Start difference. First operand 24 states and 25 transitions. Second operand has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:57,621 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:57,621 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2023-11-29 02:05:57,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:05:57,622 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2023-11-29 02:05:57,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:57,622 INFO L225 Difference]: With dead ends: 39 [2023-11-29 02:05:57,622 INFO L226 Difference]: Without dead ends: 27 [2023-11-29 02:05:57,623 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 38 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 02:05:57,624 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 34 mSDsluCounter, 44 mSDsCounter, 0 mSdLazyCounter, 185 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 34 SdHoareTripleChecker+Valid, 50 SdHoareTripleChecker+Invalid, 187 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:05:57,624 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [34 Valid, 50 Invalid, 187 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 185 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:05:57,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-29 02:05:57,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-11-29 02:05:57,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 25 states have (on average 1.08) internal successors, (27), 25 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:57,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 27 transitions. [2023-11-29 02:05:57,626 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 27 transitions. Word has length 23 [2023-11-29 02:05:57,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:57,626 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 27 transitions. [2023-11-29 02:05:57,627 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 19 states have (on average 2.0) internal successors, (38), 19 states have internal predecessors, (38), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:57,627 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 27 transitions. [2023-11-29 02:05:57,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-29 02:05:57,627 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:57,627 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:57,633 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Ended with exit code 0 [2023-11-29 02:05:57,833 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-29 02:05:57,833 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 02:05:57,833 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:57,833 INFO L85 PathProgramCache]: Analyzing trace with hash 1074135576, now seen corresponding path program 4 times [2023-11-29 02:05:57,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:57,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067171385] [2023-11-29 02:05:57,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:57,834 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:57,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:58,208 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 1 proven. 23 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:58,209 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:58,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067171385] [2023-11-29 02:05:58,209 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1067171385] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:05:58,209 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1276026692] [2023-11-29 02:05:58,209 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:05:58,209 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:05:58,209 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:05:58,212 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:05:58,214 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-29 02:05:58,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:05:58,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:05:58,305 INFO L262 TraceCheckSpWp]: Trace formula consists of 151 conjuncts, 28 conjunts are in the unsatisfiable core [2023-11-29 02:05:58,308 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:05:58,314 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:05:58,467 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:58,468 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:05:58,745 INFO L134 CoverageAnalysis]: Checked inductivity of 24 backedges. 4 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:58,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1276026692] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:05:58,745 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:05:58,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10, 10] total 24 [2023-11-29 02:05:58,746 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509441747] [2023-11-29 02:05:58,746 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:05:58,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 02:05:58,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:05:58,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 02:05:58,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=503, Unknown=0, NotChecked=0, Total=600 [2023-11-29 02:05:58,747 INFO L87 Difference]: Start difference. First operand 26 states and 27 transitions. Second operand has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:59,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:05:59,030 INFO L93 Difference]: Finished difference Result 33 states and 34 transitions. [2023-11-29 02:05:59,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-29 02:05:59,031 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2023-11-29 02:05:59,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:05:59,031 INFO L225 Difference]: With dead ends: 33 [2023-11-29 02:05:59,031 INFO L226 Difference]: Without dead ends: 33 [2023-11-29 02:05:59,032 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 34 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=157, Invalid=773, Unknown=0, NotChecked=0, Total=930 [2023-11-29 02:05:59,034 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 75 mSDsluCounter, 50 mSDsCounter, 0 mSdLazyCounter, 243 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 75 SdHoareTripleChecker+Valid, 57 SdHoareTripleChecker+Invalid, 244 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 243 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:05:59,034 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [75 Valid, 57 Invalid, 244 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 243 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:05:59,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-29 02:05:59,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 30. [2023-11-29 02:05:59,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 30 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 29 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:59,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 30 states to 30 states and 31 transitions. [2023-11-29 02:05:59,037 INFO L78 Accepts]: Start accepts. Automaton has 30 states and 31 transitions. Word has length 25 [2023-11-29 02:05:59,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:05:59,037 INFO L495 AbstractCegarLoop]: Abstraction has 30 states and 31 transitions. [2023-11-29 02:05:59,037 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 24 states have (on average 2.5833333333333335) internal successors, (62), 25 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:05:59,037 INFO L276 IsEmpty]: Start isEmpty. Operand 30 states and 31 transitions. [2023-11-29 02:05:59,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-29 02:05:59,038 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:05:59,038 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 3, 3, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:05:59,044 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Ended with exit code 0 [2023-11-29 02:05:59,240 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-29 02:05:59,240 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 02:05:59,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:05:59,241 INFO L85 PathProgramCache]: Analyzing trace with hash -326590261, now seen corresponding path program 5 times [2023-11-29 02:05:59,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:05:59,241 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608393590] [2023-11-29 02:05:59,241 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:05:59,241 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:05:59,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:05:59,680 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:59,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:05:59,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608393590] [2023-11-29 02:05:59,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [608393590] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:05:59,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975214406] [2023-11-29 02:05:59,680 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:05:59,680 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:05:59,681 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:05:59,681 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:05:59,683 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-29 02:05:59,758 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2023-11-29 02:05:59,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:05:59,760 INFO L262 TraceCheckSpWp]: Trace formula consists of 171 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 02:05:59,762 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:05:59,871 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 02:05:59,916 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:05:59,916 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:05:59,945 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 02:05:59,948 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 16 treesize of output 12 [2023-11-29 02:06:00,006 INFO L134 CoverageAnalysis]: Checked inductivity of 37 backedges. 10 proven. 27 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:00,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1975214406] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:06:00,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:06:00,007 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13, 13] total 22 [2023-11-29 02:06:00,007 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181276395] [2023-11-29 02:06:00,007 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:06:00,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 22 states [2023-11-29 02:06:00,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:00,008 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2023-11-29 02:06:00,009 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=400, Unknown=0, NotChecked=0, Total=462 [2023-11-29 02:06:00,009 INFO L87 Difference]: Start difference. First operand 30 states and 31 transitions. Second operand has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:00,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:00,296 INFO L93 Difference]: Finished difference Result 49 states and 50 transitions. [2023-11-29 02:06:00,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-29 02:06:00,296 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2023-11-29 02:06:00,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:00,297 INFO L225 Difference]: With dead ends: 49 [2023-11-29 02:06:00,297 INFO L226 Difference]: Without dead ends: 33 [2023-11-29 02:06:00,298 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 49 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=128, Invalid=802, Unknown=0, NotChecked=0, Total=930 [2023-11-29 02:06:00,298 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 35 mSDsluCounter, 70 mSDsCounter, 0 mSdLazyCounter, 307 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 35 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 310 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 307 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:00,298 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [35 Valid, 77 Invalid, 310 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 307 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:06:00,299 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 33 states. [2023-11-29 02:06:00,300 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 33 to 32. [2023-11-29 02:06:00,300 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 32 states, 31 states have (on average 1.064516129032258) internal successors, (33), 31 states have internal predecessors, (33), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:00,300 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 32 states to 32 states and 33 transitions. [2023-11-29 02:06:00,300 INFO L78 Accepts]: Start accepts. Automaton has 32 states and 33 transitions. Word has length 29 [2023-11-29 02:06:00,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:00,301 INFO L495 AbstractCegarLoop]: Abstraction has 32 states and 33 transitions. [2023-11-29 02:06:00,301 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 22 states, 22 states have (on average 2.090909090909091) internal successors, (46), 22 states have internal predecessors, (46), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:00,301 INFO L276 IsEmpty]: Start isEmpty. Operand 32 states and 33 transitions. [2023-11-29 02:06:00,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-29 02:06:00,302 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:00,302 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 4, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:00,307 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-29 02:06:00,504 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-29 02:06:00,505 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 02:06:00,505 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:00,505 INFO L85 PathProgramCache]: Analyzing trace with hash -1680216795, now seen corresponding path program 6 times [2023-11-29 02:06:00,505 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:00,505 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2061617376] [2023-11-29 02:06:00,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:00,505 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:00,521 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:00,882 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 4 proven. 40 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:00,883 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:00,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2061617376] [2023-11-29 02:06:00,883 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2061617376] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:06:00,883 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909161535] [2023-11-29 02:06:00,883 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:06:00,883 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:00,883 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:00,884 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:00,885 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-29 02:06:00,978 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2023-11-29 02:06:00,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:06:00,980 INFO L262 TraceCheckSpWp]: Trace formula consists of 184 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-29 02:06:00,982 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:01,179 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:06:01,382 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 02:06:01,454 INFO L134 CoverageAnalysis]: Checked inductivity of 44 backedges. 9 proven. 35 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:01,455 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1909161535] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:06:01,455 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:06:01,455 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 12, 12] total 28 [2023-11-29 02:06:01,455 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1625435101] [2023-11-29 02:06:01,455 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:06:01,455 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:06:01,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:01,456 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:06:01,457 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=671, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:06:01,457 INFO L87 Difference]: Start difference. First operand 32 states and 33 transitions. Second operand has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:01,706 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:01,707 INFO L93 Difference]: Finished difference Result 39 states and 40 transitions. [2023-11-29 02:06:01,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2023-11-29 02:06:01,707 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 31 [2023-11-29 02:06:01,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:01,707 INFO L225 Difference]: With dead ends: 39 [2023-11-29 02:06:01,707 INFO L226 Difference]: Without dead ends: 39 [2023-11-29 02:06:01,708 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 39 SyntacticMatches, 5 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=224, Invalid=1036, Unknown=0, NotChecked=0, Total=1260 [2023-11-29 02:06:01,709 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 38 mSDsluCounter, 53 mSDsCounter, 0 mSdLazyCounter, 283 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 38 SdHoareTripleChecker+Valid, 62 SdHoareTripleChecker+Invalid, 284 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 283 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:01,709 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [38 Valid, 62 Invalid, 284 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 283 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-29 02:06:01,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-29 02:06:01,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 36. [2023-11-29 02:06:01,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.0571428571428572) internal successors, (37), 35 states have internal predecessors, (37), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:01,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 37 transitions. [2023-11-29 02:06:01,711 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 37 transitions. Word has length 31 [2023-11-29 02:06:01,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:01,712 INFO L495 AbstractCegarLoop]: Abstraction has 36 states and 37 transitions. [2023-11-29 02:06:01,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.7857142857142856) internal successors, (78), 29 states have internal predecessors, (78), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:01,712 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 37 transitions. [2023-11-29 02:06:01,713 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-29 02:06:01,713 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:01,713 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 4, 4, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:01,719 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Ended with exit code 0 [2023-11-29 02:06:01,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:01,917 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 02:06:01,917 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:01,917 INFO L85 PathProgramCache]: Analyzing trace with hash 388382040, now seen corresponding path program 7 times [2023-11-29 02:06:01,917 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:01,917 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556240032] [2023-11-29 02:06:01,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:01,918 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:01,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:02,411 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:02,411 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:02,411 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556240032] [2023-11-29 02:06:02,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556240032] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:06:02,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [499967343] [2023-11-29 02:06:02,412 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:06:02,412 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:02,412 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:02,413 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:02,415 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-29 02:06:02,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:02,502 INFO L262 TraceCheckSpWp]: Trace formula consists of 204 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 02:06:02,505 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:02,636 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 02:06:02,686 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:02,687 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:06:02,721 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 02:06:02,723 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 02:06:02,792 INFO L134 CoverageAnalysis]: Checked inductivity of 61 backedges. 13 proven. 48 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:02,792 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [499967343] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:06:02,792 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:06:02,792 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15, 15] total 25 [2023-11-29 02:06:02,793 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949345035] [2023-11-29 02:06:02,793 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:06:02,793 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-29 02:06:02,793 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:02,794 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-29 02:06:02,794 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=531, Unknown=0, NotChecked=0, Total=600 [2023-11-29 02:06:02,794 INFO L87 Difference]: Start difference. First operand 36 states and 37 transitions. Second operand has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 02:06:03,147 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:03,148 INFO L93 Difference]: Finished difference Result 59 states and 60 transitions. [2023-11-29 02:06:03,148 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-29 02:06:03,148 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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) Word has length 35 [2023-11-29 02:06:03,149 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:03,149 INFO L225 Difference]: With dead ends: 59 [2023-11-29 02:06:03,149 INFO L226 Difference]: Without dead ends: 39 [2023-11-29 02:06:03,150 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 94 GetRequests, 60 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 02:06:03,150 INFO L413 NwaCegarLoop]: 8 mSDtfsCounter, 42 mSDsluCounter, 71 mSDsCounter, 0 mSdLazyCounter, 330 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 42 SdHoareTripleChecker+Valid, 79 SdHoareTripleChecker+Invalid, 334 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 330 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:03,151 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [42 Valid, 79 Invalid, 334 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 330 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:06:03,151 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 39 states. [2023-11-29 02:06:03,153 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 39 to 38. [2023-11-29 02:06:03,153 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 1.054054054054054) internal successors, (39), 37 states have internal predecessors, (39), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:03,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 39 transitions. [2023-11-29 02:06:03,154 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 39 transitions. Word has length 35 [2023-11-29 02:06:03,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:03,154 INFO L495 AbstractCegarLoop]: Abstraction has 38 states and 39 transitions. [2023-11-29 02:06:03,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 25 states have (on average 2.16) internal successors, (54), 25 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 02:06:03,155 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 39 transitions. [2023-11-29 02:06:03,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 38 [2023-11-29 02:06:03,155 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:03,156 INFO L195 NwaCegarLoop]: trace histogram [5, 5, 5, 5, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:03,164 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-29 02:06:03,364 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:03,365 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 02:06:03,365 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:03,365 INFO L85 PathProgramCache]: Analyzing trace with hash 943676978, now seen corresponding path program 8 times [2023-11-29 02:06:03,365 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:03,365 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670853068] [2023-11-29 02:06:03,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:03,366 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:03,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:03,927 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 9 proven. 61 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:03,927 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:03,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670853068] [2023-11-29 02:06:03,927 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [670853068] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:06:03,927 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1563350388] [2023-11-29 02:06:03,927 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:06:03,927 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:03,928 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:03,928 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:03,931 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-29 02:06:04,021 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:06:04,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:06:04,023 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 37 conjunts are in the unsatisfiable core [2023-11-29 02:06:04,026 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:04,244 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:04,244 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:06:04,492 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 02:06:04,587 INFO L134 CoverageAnalysis]: Checked inductivity of 70 backedges. 16 proven. 54 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:04,587 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1563350388] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:06:04,588 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:06:04,588 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 14, 14] total 28 [2023-11-29 02:06:04,588 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1991215051] [2023-11-29 02:06:04,588 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:06:04,588 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 29 states [2023-11-29 02:06:04,589 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:04,589 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 29 interpolants. [2023-11-29 02:06:04,590 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=122, Invalid=690, Unknown=0, NotChecked=0, Total=812 [2023-11-29 02:06:04,590 INFO L87 Difference]: Start difference. First operand 38 states and 39 transitions. Second operand has 29 states, 28 states have (on average 2.75) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:04,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:04,976 INFO L93 Difference]: Finished difference Result 45 states and 46 transitions. [2023-11-29 02:06:04,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2023-11-29 02:06:04,976 INFO L78 Accepts]: Start accepts. Automaton has has 29 states, 28 states have (on average 2.75) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 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 37 [2023-11-29 02:06:04,976 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:04,977 INFO L225 Difference]: With dead ends: 45 [2023-11-29 02:06:04,977 INFO L226 Difference]: Without dead ends: 45 [2023-11-29 02:06:04,977 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 93 GetRequests, 52 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 02:06:04,978 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 41 mSDsluCounter, 73 mSDsCounter, 0 mSdLazyCounter, 402 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 41 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 403 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 402 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:04,978 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [41 Valid, 82 Invalid, 403 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 402 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:06:04,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-29 02:06:04,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2023-11-29 02:06:04,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 1.048780487804878) internal successors, (43), 41 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 02:06:04,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 43 transitions. [2023-11-29 02:06:04,980 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 43 transitions. Word has length 37 [2023-11-29 02:06:04,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:04,981 INFO L495 AbstractCegarLoop]: Abstraction has 42 states and 43 transitions. [2023-11-29 02:06:04,981 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 29 states, 28 states have (on average 2.75) internal successors, (77), 29 states have internal predecessors, (77), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:04,981 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 43 transitions. [2023-11-29 02:06:04,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-29 02:06:04,982 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:04,982 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 5, 5, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:04,987 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Ended with exit code 0 [2023-11-29 02:06:05,183 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:05,184 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 02:06:05,184 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:05,184 INFO L85 PathProgramCache]: Analyzing trace with hash 841113573, now seen corresponding path program 9 times [2023-11-29 02:06:05,184 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:05,184 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824804397] [2023-11-29 02:06:05,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:05,184 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:05,672 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:05,672 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:05,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824804397] [2023-11-29 02:06:05,672 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1824804397] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:06:05,672 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28336530] [2023-11-29 02:06:05,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:06:05,673 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:05,673 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:05,673 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:05,680 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-29 02:06:05,810 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2023-11-29 02:06:05,810 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:06:05,812 INFO L262 TraceCheckSpWp]: Trace formula consists of 237 conjuncts, 49 conjunts are in the unsatisfiable core [2023-11-29 02:06:05,815 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:05,952 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 02:06:06,001 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:06,001 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:06:06,038 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 02:06:06,040 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 02:06:06,102 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 16 proven. 75 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:06,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [28336530] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:06:06,102 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:06:06,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17, 17] total 28 [2023-11-29 02:06:06,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1373427933] [2023-11-29 02:06:06,102 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:06:06,103 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 28 states [2023-11-29 02:06:06,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:06,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 28 interpolants. [2023-11-29 02:06:06,104 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=680, Unknown=0, NotChecked=0, Total=756 [2023-11-29 02:06:06,104 INFO L87 Difference]: Start difference. First operand 42 states and 43 transitions. Second operand has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:06,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:06,529 INFO L93 Difference]: Finished difference Result 69 states and 70 transitions. [2023-11-29 02:06:06,530 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-29 02:06:06,530 INFO L78 Accepts]: Start accepts. Automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 41 [2023-11-29 02:06:06,530 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:06,531 INFO L225 Difference]: With dead ends: 69 [2023-11-29 02:06:06,531 INFO L226 Difference]: Without dead ends: 45 [2023-11-29 02:06:06,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 110 GetRequests, 71 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=166, Invalid=1474, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 02:06:06,532 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 28 mSDsluCounter, 129 mSDsCounter, 0 mSdLazyCounter, 600 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 28 SdHoareTripleChecker+Valid, 138 SdHoareTripleChecker+Invalid, 605 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 600 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:06,532 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [28 Valid, 138 Invalid, 605 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 600 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-29 02:06:06,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2023-11-29 02:06:06,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 44. [2023-11-29 02:06:06,534 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 44 states, 43 states have (on average 1.0465116279069768) internal successors, (45), 43 states have internal predecessors, (45), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:06,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 45 transitions. [2023-11-29 02:06:06,535 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 45 transitions. Word has length 41 [2023-11-29 02:06:06,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:06,535 INFO L495 AbstractCegarLoop]: Abstraction has 44 states and 45 transitions. [2023-11-29 02:06:06,535 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 28 states, 28 states have (on average 2.2142857142857144) internal successors, (62), 28 states have internal predecessors, (62), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:06,535 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 45 transitions. [2023-11-29 02:06:06,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 44 [2023-11-29 02:06:06,536 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:06,536 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 6, 6, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:06,540 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Ended with exit code 0 [2023-11-29 02:06:06,736 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:06,737 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 02:06:06,737 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:06,737 INFO L85 PathProgramCache]: Analyzing trace with hash 804386111, now seen corresponding path program 10 times [2023-11-29 02:06:06,737 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:06,737 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1539022670] [2023-11-29 02:06:06,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:06,737 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:06,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:07,344 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 16 proven. 86 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:07,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:07,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1539022670] [2023-11-29 02:06:07,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1539022670] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:06:07,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1325209750] [2023-11-29 02:06:07,344 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:06:07,344 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:07,345 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:07,345 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:07,348 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-29 02:06:07,454 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:06:07,454 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:06:07,457 INFO L262 TraceCheckSpWp]: Trace formula consists of 250 conjuncts, 43 conjunts are in the unsatisfiable core [2023-11-29 02:06:07,459 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:07,465 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:06:07,721 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 25 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:07,721 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:06:08,275 INFO L134 CoverageAnalysis]: Checked inductivity of 102 backedges. 25 proven. 77 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:08,275 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1325209750] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:06:08,276 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:06:08,276 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 16, 16] total 39 [2023-11-29 02:06:08,276 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61711801] [2023-11-29 02:06:08,276 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:06:08,276 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 02:06:08,276 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:08,277 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 02:06:08,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=226, Invalid=1334, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 02:06:08,278 INFO L87 Difference]: Start difference. First operand 44 states and 45 transitions. Second operand has 40 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 40 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:08,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:08,791 INFO L93 Difference]: Finished difference Result 51 states and 52 transitions. [2023-11-29 02:06:08,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-29 02:06:08,791 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 40 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 43 [2023-11-29 02:06:08,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:08,792 INFO L225 Difference]: With dead ends: 51 [2023-11-29 02:06:08,792 INFO L226 Difference]: Without dead ends: 51 [2023-11-29 02:06:08,793 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 108 GetRequests, 61 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 630 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=334, Invalid=2018, Unknown=0, NotChecked=0, Total=2352 [2023-11-29 02:06:08,793 INFO L413 NwaCegarLoop]: 10 mSDtfsCounter, 53 mSDsluCounter, 91 mSDsCounter, 0 mSdLazyCounter, 466 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 101 SdHoareTripleChecker+Invalid, 467 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 466 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:08,794 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 101 Invalid, 467 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 466 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:06:08,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2023-11-29 02:06:08,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 48. [2023-11-29 02:06:08,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 1.0425531914893618) internal successors, (49), 47 states have internal predecessors, (49), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:08,796 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 49 transitions. [2023-11-29 02:06:08,796 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 49 transitions. Word has length 43 [2023-11-29 02:06:08,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:08,797 INFO L495 AbstractCegarLoop]: Abstraction has 48 states and 49 transitions. [2023-11-29 02:06:08,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 39 states have (on average 2.6666666666666665) internal successors, (104), 40 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:08,797 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 49 transitions. [2023-11-29 02:06:08,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-29 02:06:08,798 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:08,798 INFO L195 NwaCegarLoop]: trace histogram [7, 7, 7, 7, 6, 6, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:08,803 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Ended with exit code 0 [2023-11-29 02:06:08,998 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-29 02:06:08,998 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 02:06:08,998 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:08,998 INFO L85 PathProgramCache]: Analyzing trace with hash 1365813362, now seen corresponding path program 11 times [2023-11-29 02:06:08,999 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:08,999 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665050463] [2023-11-29 02:06:08,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:08,999 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:09,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:09,665 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 19 proven. 108 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:09,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:09,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665050463] [2023-11-29 02:06:09,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1665050463] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:06:09,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [557502550] [2023-11-29 02:06:09,665 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:06:09,665 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:09,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:09,666 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:09,667 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-29 02:06:09,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2023-11-29 02:06:09,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:06:09,778 INFO L262 TraceCheckSpWp]: Trace formula consists of 270 conjuncts, 56 conjunts are in the unsatisfiable core [2023-11-29 02:06:09,781 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:09,786 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:06:10,006 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 02:06:10,560 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:10,560 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 32 treesize of output 25 [2023-11-29 02:06:10,692 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:10,692 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:06:11,252 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 02:06:11,257 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 02:06:11,889 INFO L134 CoverageAnalysis]: Checked inductivity of 127 backedges. 25 proven. 102 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:11,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [557502550] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:06:11,889 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:06:11,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 18, 18] total 53 [2023-11-29 02:06:11,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633656768] [2023-11-29 02:06:11,889 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:06:11,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 53 states [2023-11-29 02:06:11,890 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:11,890 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 53 interpolants. [2023-11-29 02:06:11,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=269, Invalid=2487, Unknown=0, NotChecked=0, Total=2756 [2023-11-29 02:06:11,891 INFO L87 Difference]: Start difference. First operand 48 states and 49 transitions. Second operand has 53 states, 53 states have (on average 2.5849056603773586) internal successors, (137), 53 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:16,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:16,630 INFO L93 Difference]: Finished difference Result 86 states and 87 transitions. [2023-11-29 02:06:16,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2023-11-29 02:06:16,630 INFO L78 Accepts]: Start accepts. Automaton has has 53 states, 53 states have (on average 2.5849056603773586) internal successors, (137), 53 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 47 [2023-11-29 02:06:16,630 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:16,631 INFO L225 Difference]: With dead ends: 86 [2023-11-29 02:06:16,631 INFO L226 Difference]: Without dead ends: 58 [2023-11-29 02:06:16,632 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 134 GetRequests, 60 SyntacticMatches, 0 SemanticMatches, 74 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 895 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=596, Invalid=5104, Unknown=0, NotChecked=0, Total=5700 [2023-11-29 02:06:16,633 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 127 mSDsluCounter, 180 mSDsCounter, 0 mSdLazyCounter, 1017 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 127 SdHoareTripleChecker+Valid, 191 SdHoareTripleChecker+Invalid, 1019 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1017 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:16,633 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [127 Valid, 191 Invalid, 1019 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1017 Invalid, 1 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 02:06:16,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2023-11-29 02:06:16,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 54. [2023-11-29 02:06:16,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 1.0377358490566038) internal successors, (55), 53 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:16,634 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 55 transitions. [2023-11-29 02:06:16,634 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 55 transitions. Word has length 47 [2023-11-29 02:06:16,635 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:16,635 INFO L495 AbstractCegarLoop]: Abstraction has 54 states and 55 transitions. [2023-11-29 02:06:16,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 53 states, 53 states have (on average 2.5849056603773586) internal successors, (137), 53 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:16,635 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 55 transitions. [2023-11-29 02:06:16,635 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 54 [2023-11-29 02:06:16,635 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:16,636 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 7, 7, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:16,640 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Ended with exit code 0 [2023-11-29 02:06:16,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:16,836 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 02:06:16,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:16,837 INFO L85 PathProgramCache]: Analyzing trace with hash 1620883199, now seen corresponding path program 12 times [2023-11-29 02:06:16,837 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:16,837 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1468673560] [2023-11-29 02:06:16,837 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:16,837 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:16,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:17,578 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 22 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:17,578 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:17,578 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1468673560] [2023-11-29 02:06:17,578 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1468673560] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:06:17,579 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [157229244] [2023-11-29 02:06:17,579 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:06:17,579 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:17,579 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:17,580 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:17,582 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-29 02:06:17,840 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2023-11-29 02:06:17,840 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:06:17,842 INFO L262 TraceCheckSpWp]: Trace formula consists of 303 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-29 02:06:17,845 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:18,023 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 02:06:18,095 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 22 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:18,096 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:06:18,130 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 02:06:18,131 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 02:06:18,200 INFO L134 CoverageAnalysis]: Checked inductivity of 169 backedges. 22 proven. 147 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:18,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [157229244] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:06:18,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:06:18,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21, 21] total 35 [2023-11-29 02:06:18,200 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [877498983] [2023-11-29 02:06:18,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:06:18,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 35 states [2023-11-29 02:06:18,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:18,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 35 interpolants. [2023-11-29 02:06:18,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=1096, Unknown=0, NotChecked=0, Total=1190 [2023-11-29 02:06:18,202 INFO L87 Difference]: Start difference. First operand 54 states and 55 transitions. Second operand has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:18,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:18,838 INFO L93 Difference]: Finished difference Result 89 states and 90 transitions. [2023-11-29 02:06:18,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2023-11-29 02:06:18,838 INFO L78 Accepts]: Start accepts. Automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 53 [2023-11-29 02:06:18,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:18,838 INFO L225 Difference]: With dead ends: 89 [2023-11-29 02:06:18,839 INFO L226 Difference]: Without dead ends: 57 [2023-11-29 02:06:18,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 142 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 276 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=209, Invalid=2443, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 02:06:18,840 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 65 mSDsluCounter, 205 mSDsCounter, 0 mSdLazyCounter, 977 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 65 SdHoareTripleChecker+Valid, 216 SdHoareTripleChecker+Invalid, 984 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 977 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:18,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [65 Valid, 216 Invalid, 984 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 977 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:06:18,840 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2023-11-29 02:06:18,841 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 56. [2023-11-29 02:06:18,841 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 1.0363636363636364) internal successors, (57), 55 states have internal predecessors, (57), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:18,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 57 transitions. [2023-11-29 02:06:18,842 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 57 transitions. Word has length 53 [2023-11-29 02:06:18,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:18,842 INFO L495 AbstractCegarLoop]: Abstraction has 56 states and 57 transitions. [2023-11-29 02:06:18,842 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 35 states, 35 states have (on average 2.2857142857142856) internal successors, (80), 35 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:18,842 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 57 transitions. [2023-11-29 02:06:18,842 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-29 02:06:18,842 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:18,843 INFO L195 NwaCegarLoop]: trace histogram [8, 8, 8, 8, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:18,848 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Ended with exit code 0 [2023-11-29 02:06:19,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:19,043 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 02:06:19,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:19,044 INFO L85 PathProgramCache]: Analyzing trace with hash 1019549017, now seen corresponding path program 13 times [2023-11-29 02:06:19,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:19,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1079337827] [2023-11-29 02:06:19,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:19,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:19,059 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:19,667 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 36 proven. 148 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:19,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:19,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1079337827] [2023-11-29 02:06:19,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1079337827] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:06:19,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1399057632] [2023-11-29 02:06:19,667 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:06:19,667 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:19,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:19,670 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:19,671 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-29 02:06:19,761 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:19,764 INFO L262 TraceCheckSpWp]: Trace formula consists of 316 conjuncts, 52 conjunts are in the unsatisfiable core [2023-11-29 02:06:19,765 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:20,081 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 49 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:20,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:06:20,385 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 02:06:20,528 INFO L134 CoverageAnalysis]: Checked inductivity of 184 backedges. 49 proven. 135 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:20,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1399057632] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:06:20,528 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:06:20,528 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 20, 20] total 40 [2023-11-29 02:06:20,528 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177286021] [2023-11-29 02:06:20,528 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:06:20,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 41 states [2023-11-29 02:06:20,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:20,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 41 interpolants. [2023-11-29 02:06:20,530 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=227, Invalid=1413, Unknown=0, NotChecked=0, Total=1640 [2023-11-29 02:06:20,530 INFO L87 Difference]: Start difference. First operand 56 states and 57 transitions. Second operand has 41 states, 40 states have (on average 2.825) internal successors, (113), 41 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:21,098 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:21,098 INFO L93 Difference]: Finished difference Result 63 states and 64 transitions. [2023-11-29 02:06:21,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-29 02:06:21,098 INFO L78 Accepts]: Start accepts. Automaton has has 41 states, 40 states have (on average 2.825) internal successors, (113), 41 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-29 02:06:21,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:21,099 INFO L225 Difference]: With dead ends: 63 [2023-11-29 02:06:21,099 INFO L226 Difference]: Without dead ends: 63 [2023-11-29 02:06:21,100 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 138 GetRequests, 79 SyntacticMatches, 9 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 977 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=353, Invalid=2299, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 02:06:21,101 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 57 mSDsluCounter, 120 mSDsCounter, 0 mSdLazyCounter, 680 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 57 SdHoareTripleChecker+Valid, 132 SdHoareTripleChecker+Invalid, 681 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 680 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:21,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [57 Valid, 132 Invalid, 681 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 680 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-29 02:06:21,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2023-11-29 02:06:21,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 60. [2023-11-29 02:06:21,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 1.0338983050847457) internal successors, (61), 59 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 02:06:21,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 61 transitions. [2023-11-29 02:06:21,103 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 61 transitions. Word has length 55 [2023-11-29 02:06:21,103 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:21,103 INFO L495 AbstractCegarLoop]: Abstraction has 60 states and 61 transitions. [2023-11-29 02:06:21,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 41 states, 40 states have (on average 2.825) internal successors, (113), 41 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:21,104 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 61 transitions. [2023-11-29 02:06:21,104 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-29 02:06:21,104 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:21,104 INFO L195 NwaCegarLoop]: trace histogram [9, 9, 9, 9, 8, 8, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:21,109 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Ended with exit code 0 [2023-11-29 02:06:21,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25,15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:21,305 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 02:06:21,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:21,305 INFO L85 PathProgramCache]: Analyzing trace with hash -2128991348, now seen corresponding path program 14 times [2023-11-29 02:06:21,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:21,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540309532] [2023-11-29 02:06:21,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:21,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:21,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:22,096 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 25 proven. 192 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:22,096 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:22,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540309532] [2023-11-29 02:06:22,096 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540309532] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:06:22,096 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453517856] [2023-11-29 02:06:22,097 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:06:22,097 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:22,097 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:22,098 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:22,101 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-29 02:06:22,217 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:06:22,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:06:22,219 INFO L262 TraceCheckSpWp]: Trace formula consists of 336 conjuncts, 62 conjunts are in the unsatisfiable core [2023-11-29 02:06:22,221 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:22,401 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 02:06:23,368 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:23,368 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 32 treesize of output 29 [2023-11-29 02:06:23,519 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 49 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:23,519 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:06:24,348 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 02:06:24,352 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 02:06:24,357 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 02:06:24,515 INFO L134 CoverageAnalysis]: Checked inductivity of 217 backedges. 49 proven. 168 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:24,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [453517856] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:06:24,515 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:06:24,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 23, 23] total 58 [2023-11-29 02:06:24,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471335570] [2023-11-29 02:06:24,515 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:06:24,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-29 02:06:24,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:24,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-29 02:06:24,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=276, Invalid=3030, Unknown=0, NotChecked=0, Total=3306 [2023-11-29 02:06:24,518 INFO L87 Difference]: Start difference. First operand 60 states and 61 transitions. Second operand has 58 states, 58 states have (on average 2.6551724137931036) internal successors, (154), 58 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:30,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:30,138 INFO L93 Difference]: Finished difference Result 106 states and 107 transitions. [2023-11-29 02:06:30,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2023-11-29 02:06:30,139 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.6551724137931036) internal successors, (154), 58 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-29 02:06:30,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:30,140 INFO L225 Difference]: With dead ends: 106 [2023-11-29 02:06:30,140 INFO L226 Difference]: Without dead ends: 70 [2023-11-29 02:06:30,143 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 167 GetRequests, 74 SyntacticMatches, 9 SemanticMatches, 84 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1401 ImplicationChecksByTransitivity, 4.0s TimeCoverageRelationStatistics Valid=647, Invalid=6663, Unknown=0, NotChecked=0, Total=7310 [2023-11-29 02:06:30,143 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 105 mSDsluCounter, 273 mSDsCounter, 0 mSdLazyCounter, 1586 mSolverCounterSat, 7 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 105 SdHoareTripleChecker+Valid, 286 SdHoareTripleChecker+Invalid, 1594 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 1586 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:30,144 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [105 Valid, 286 Invalid, 1594 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 1586 Invalid, 1 Unknown, 0 Unchecked, 3.5s Time] [2023-11-29 02:06:30,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2023-11-29 02:06:30,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2023-11-29 02:06:30,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 1.0307692307692307) internal successors, (67), 65 states have internal predecessors, (67), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:30,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 67 transitions. [2023-11-29 02:06:30,146 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 67 transitions. Word has length 59 [2023-11-29 02:06:30,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:30,146 INFO L495 AbstractCegarLoop]: Abstraction has 66 states and 67 transitions. [2023-11-29 02:06:30,146 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.6551724137931036) internal successors, (154), 58 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:30,146 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 67 transitions. [2023-11-29 02:06:30,147 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 66 [2023-11-29 02:06:30,147 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:30,147 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 9, 9, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:30,152 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Ended with exit code 0 [2023-11-29 02:06:30,347 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:30,348 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 02:06:30,348 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:30,348 INFO L85 PathProgramCache]: Analyzing trace with hash -403397095, now seen corresponding path program 15 times [2023-11-29 02:06:30,348 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:30,348 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2115740812] [2023-11-29 02:06:30,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:30,348 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:30,372 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:31,176 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 28 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:31,177 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:31,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2115740812] [2023-11-29 02:06:31,177 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2115740812] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:06:31,177 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785436260] [2023-11-29 02:06:31,177 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:06:31,177 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:31,177 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:31,178 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:31,181 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-29 02:06:31,397 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 11 check-sat command(s) [2023-11-29 02:06:31,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:06:31,400 INFO L262 TraceCheckSpWp]: Trace formula consists of 369 conjuncts, 73 conjunts are in the unsatisfiable core [2023-11-29 02:06:31,402 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:31,677 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 02:06:31,749 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 28 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:31,750 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:06:31,811 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 02:06:31,813 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 02:06:31,898 INFO L134 CoverageAnalysis]: Checked inductivity of 271 backedges. 28 proven. 243 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:31,898 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1785436260] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:06:31,898 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:06:31,899 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [25, 25, 25] total 40 [2023-11-29 02:06:31,899 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982405272] [2023-11-29 02:06:31,899 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:06:31,899 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 40 states [2023-11-29 02:06:31,899 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:31,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 40 interpolants. [2023-11-29 02:06:31,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=1456, Unknown=0, NotChecked=0, Total=1560 [2023-11-29 02:06:31,901 INFO L87 Difference]: Start difference. First operand 66 states and 67 transitions. Second operand has 40 states, 40 states have (on average 2.35) internal successors, (94), 40 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:32,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:32,937 INFO L93 Difference]: Finished difference Result 109 states and 110 transitions. [2023-11-29 02:06:32,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-29 02:06:32,937 INFO L78 Accepts]: Start accepts. Automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 40 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 65 [2023-11-29 02:06:32,937 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:32,938 INFO L225 Difference]: With dead ends: 109 [2023-11-29 02:06:32,938 INFO L226 Difference]: Without dead ends: 69 [2023-11-29 02:06:32,940 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 174 GetRequests, 115 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 355 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=242, Invalid=3418, Unknown=0, NotChecked=0, Total=3660 [2023-11-29 02:06:32,940 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 80 mSDsluCounter, 338 mSDsCounter, 0 mSdLazyCounter, 1632 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 80 SdHoareTripleChecker+Valid, 351 SdHoareTripleChecker+Invalid, 1641 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 1632 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:32,940 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [80 Valid, 351 Invalid, 1641 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 1632 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:06:32,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2023-11-29 02:06:32,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 68. [2023-11-29 02:06:32,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 1.0298507462686568) internal successors, (69), 67 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 02:06:32,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 69 transitions. [2023-11-29 02:06:32,942 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 69 transitions. Word has length 65 [2023-11-29 02:06:32,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:32,942 INFO L495 AbstractCegarLoop]: Abstraction has 68 states and 69 transitions. [2023-11-29 02:06:32,942 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 40 states, 40 states have (on average 2.35) internal successors, (94), 40 states have internal predecessors, (94), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:32,942 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 69 transitions. [2023-11-29 02:06:32,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 68 [2023-11-29 02:06:32,943 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:32,943 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 10, 10, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:32,948 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2023-11-29 02:06:33,143 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:33,143 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 02:06:33,144 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:33,144 INFO L85 PathProgramCache]: Analyzing trace with hash -1097839245, now seen corresponding path program 16 times [2023-11-29 02:06:33,144 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:33,144 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999948775] [2023-11-29 02:06:33,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:33,144 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:33,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:33,822 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 64 proven. 226 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:33,822 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:33,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999948775] [2023-11-29 02:06:33,822 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999948775] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:06:33,822 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [180691230] [2023-11-29 02:06:33,822 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:06:33,822 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:33,823 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:33,823 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:33,825 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-29 02:06:33,982 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:06:33,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:06:33,985 INFO L262 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 63 conjunts are in the unsatisfiable core [2023-11-29 02:06:33,988 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:33,991 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:06:34,355 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 81 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:34,355 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:06:35,320 INFO L134 CoverageAnalysis]: Checked inductivity of 290 backedges. 81 proven. 209 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:35,320 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [180691230] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:06:35,320 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:06:35,320 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [23, 24, 24] total 59 [2023-11-29 02:06:35,320 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150559204] [2023-11-29 02:06:35,321 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:06:35,321 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 60 states [2023-11-29 02:06:35,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:35,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 60 interpolants. [2023-11-29 02:06:35,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=496, Invalid=3044, Unknown=0, NotChecked=0, Total=3540 [2023-11-29 02:06:35,324 INFO L87 Difference]: Start difference. First operand 68 states and 69 transitions. Second operand has 60 states, 59 states have (on average 2.711864406779661) internal successors, (160), 60 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 02:06:36,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:36,004 INFO L93 Difference]: Finished difference Result 75 states and 76 transitions. [2023-11-29 02:06:36,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-29 02:06:36,004 INFO L78 Accepts]: Start accepts. Automaton has has 60 states, 59 states have (on average 2.711864406779661) internal successors, (160), 60 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) Word has length 67 [2023-11-29 02:06:36,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:36,004 INFO L225 Difference]: With dead ends: 75 [2023-11-29 02:06:36,005 INFO L226 Difference]: Without dead ends: 75 [2023-11-29 02:06:36,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 168 GetRequests, 97 SyntacticMatches, 0 SemanticMatches, 71 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1596 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=682, Invalid=4574, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 02:06:36,007 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 114 mSDsluCounter, 161 mSDsCounter, 0 mSdLazyCounter, 910 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 114 SdHoareTripleChecker+Valid, 176 SdHoareTripleChecker+Invalid, 911 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 910 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:36,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [114 Valid, 176 Invalid, 911 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 910 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-29 02:06:36,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2023-11-29 02:06:36,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 72. [2023-11-29 02:06:36,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 1.028169014084507) internal successors, (73), 71 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:36,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 73 transitions. [2023-11-29 02:06:36,009 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 73 transitions. Word has length 67 [2023-11-29 02:06:36,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:36,010 INFO L495 AbstractCegarLoop]: Abstraction has 72 states and 73 transitions. [2023-11-29 02:06:36,010 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 60 states, 59 states have (on average 2.711864406779661) internal successors, (160), 60 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 02:06:36,010 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 73 transitions. [2023-11-29 02:06:36,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 72 [2023-11-29 02:06:36,010 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:36,010 INFO L195 NwaCegarLoop]: trace histogram [11, 11, 11, 11, 10, 10, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:36,015 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Ended with exit code 0 [2023-11-29 02:06:36,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28,18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:36,211 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 02:06:36,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:36,211 INFO L85 PathProgramCache]: Analyzing trace with hash 1006093990, now seen corresponding path program 17 times [2023-11-29 02:06:36,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:36,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [968698129] [2023-11-29 02:06:36,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:36,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:36,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:37,038 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 31 proven. 300 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:37,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:37,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [968698129] [2023-11-29 02:06:37,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [968698129] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:06:37,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [597366457] [2023-11-29 02:06:37,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:06:37,039 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:37,039 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:37,039 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:37,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-29 02:06:37,213 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 12 check-sat command(s) [2023-11-29 02:06:37,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:06:37,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 402 conjuncts, 76 conjunts are in the unsatisfiable core [2023-11-29 02:06:37,218 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:37,224 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:06:37,543 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 02:06:38,549 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:38,550 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 32 treesize of output 25 [2023-11-29 02:06:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 81 proven. 250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:38,723 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:06:39,766 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 02:06:39,770 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 02:06:41,157 INFO L134 CoverageAnalysis]: Checked inductivity of 331 backedges. 81 proven. 250 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:41,158 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [597366457] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:06:41,158 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:06:41,158 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 26, 26] total 77 [2023-11-29 02:06:41,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156435190] [2023-11-29 02:06:41,158 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:06:41,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 77 states [2023-11-29 02:06:41,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:41,159 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 77 interpolants. [2023-11-29 02:06:41,160 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=533, Invalid=5319, Unknown=0, NotChecked=0, Total=5852 [2023-11-29 02:06:41,161 INFO L87 Difference]: Start difference. First operand 72 states and 73 transitions. Second operand has 77 states, 77 states have (on average 2.7142857142857144) internal successors, (209), 77 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:49,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:49,960 INFO L93 Difference]: Finished difference Result 126 states and 127 transitions. [2023-11-29 02:06:49,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2023-11-29 02:06:49,960 INFO L78 Accepts]: Start accepts. Automaton has has 77 states, 77 states have (on average 2.7142857142857144) internal successors, (209), 77 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 71 [2023-11-29 02:06:49,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:49,961 INFO L225 Difference]: With dead ends: 126 [2023-11-29 02:06:49,961 INFO L226 Difference]: Without dead ends: 82 [2023-11-29 02:06:49,962 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 92 SyntacticMatches, 0 SemanticMatches, 106 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1912 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=1052, Invalid=10504, Unknown=0, NotChecked=0, Total=11556 [2023-11-29 02:06:49,962 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 120 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 1950 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 120 SdHoareTripleChecker+Valid, 366 SdHoareTripleChecker+Invalid, 1953 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1950 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:49,963 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [120 Valid, 366 Invalid, 1953 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1950 Invalid, 2 Unknown, 0 Unchecked, 2.5s Time] [2023-11-29 02:06:49,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2023-11-29 02:06:49,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 78. [2023-11-29 02:06:49,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 1.025974025974026) internal successors, (79), 77 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 02:06:49,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 79 transitions. [2023-11-29 02:06:49,965 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 79 transitions. Word has length 71 [2023-11-29 02:06:49,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:49,965 INFO L495 AbstractCegarLoop]: Abstraction has 78 states and 79 transitions. [2023-11-29 02:06:49,965 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 77 states, 77 states have (on average 2.7142857142857144) internal successors, (209), 77 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:49,965 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 79 transitions. [2023-11-29 02:06:49,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 78 [2023-11-29 02:06:49,966 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:49,966 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 11, 11, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:49,973 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Ended with exit code 0 [2023-11-29 02:06:50,166 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:50,166 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 02:06:50,167 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:50,167 INFO L85 PathProgramCache]: Analyzing trace with hash 1940335923, now seen corresponding path program 18 times [2023-11-29 02:06:50,167 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:50,167 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087917819] [2023-11-29 02:06:50,167 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:50,167 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:50,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:51,030 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 34 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:51,030 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:51,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087917819] [2023-11-29 02:06:51,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2087917819] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:06:51,031 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [210412047] [2023-11-29 02:06:51,031 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:06:51,031 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:51,031 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:51,032 INFO L229 MonitoredProcess]: Starting monitored process 20 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:51,038 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2023-11-29 02:06:51,384 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 13 check-sat command(s) [2023-11-29 02:06:51,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:06:51,388 INFO L262 TraceCheckSpWp]: Trace formula consists of 435 conjuncts, 85 conjunts are in the unsatisfiable core [2023-11-29 02:06:51,391 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:51,736 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 02:06:51,834 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 34 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:51,834 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:06:51,892 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 02:06:51,893 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 02:06:51,984 INFO L134 CoverageAnalysis]: Checked inductivity of 397 backedges. 34 proven. 363 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:51,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [210412047] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:06:51,984 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:06:51,985 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [29, 29, 29] total 46 [2023-11-29 02:06:51,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385227271] [2023-11-29 02:06:51,985 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:06:51,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 46 states [2023-11-29 02:06:51,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:51,986 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 46 interpolants. [2023-11-29 02:06:51,986 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=1952, Unknown=0, NotChecked=0, Total=2070 [2023-11-29 02:06:51,987 INFO L87 Difference]: Start difference. First operand 78 states and 79 transitions. Second operand has 46 states, 46 states have (on average 2.391304347826087) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:53,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:53,328 INFO L93 Difference]: Finished difference Result 129 states and 130 transitions. [2023-11-29 02:06:53,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2023-11-29 02:06:53,328 INFO L78 Accepts]: Start accepts. Automaton has has 46 states, 46 states have (on average 2.391304347826087) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 77 [2023-11-29 02:06:53,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:53,329 INFO L225 Difference]: With dead ends: 129 [2023-11-29 02:06:53,329 INFO L226 Difference]: Without dead ends: 81 [2023-11-29 02:06:53,329 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 206 GetRequests, 137 SyntacticMatches, 0 SemanticMatches, 69 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 484 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=280, Invalid=4690, Unknown=0, NotChecked=0, Total=4970 [2023-11-29 02:06:53,330 INFO L413 NwaCegarLoop]: 15 mSDtfsCounter, 52 mSDsluCounter, 418 mSDsCounter, 0 mSdLazyCounter, 2065 mSolverCounterSat, 11 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 52 SdHoareTripleChecker+Valid, 433 SdHoareTripleChecker+Invalid, 2076 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 11 IncrementalHoareTripleChecker+Valid, 2065 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:53,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [52 Valid, 433 Invalid, 2076 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [11 Valid, 2065 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:06:53,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2023-11-29 02:06:53,331 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 80. [2023-11-29 02:06:53,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 1.0253164556962024) internal successors, (81), 79 states have internal predecessors, (81), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:53,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 81 transitions. [2023-11-29 02:06:53,331 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 81 transitions. Word has length 77 [2023-11-29 02:06:53,332 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:53,332 INFO L495 AbstractCegarLoop]: Abstraction has 80 states and 81 transitions. [2023-11-29 02:06:53,332 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 46 states, 46 states have (on average 2.391304347826087) internal successors, (110), 46 states have internal predecessors, (110), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:53,332 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 81 transitions. [2023-11-29 02:06:53,332 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 80 [2023-11-29 02:06:53,332 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:53,333 INFO L195 NwaCegarLoop]: trace histogram [12, 12, 12, 12, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:53,338 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Ended with exit code 0 [2023-11-29 02:06:53,533 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2023-11-29 02:06:53,533 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 02:06:53,533 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:53,533 INFO L85 PathProgramCache]: Analyzing trace with hash -1928290931, now seen corresponding path program 19 times [2023-11-29 02:06:53,534 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:53,534 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471443918] [2023-11-29 02:06:53,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:53,534 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:54,437 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 100 proven. 320 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:54,437 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:54,437 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471443918] [2023-11-29 02:06:54,437 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [471443918] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:06:54,438 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2061060167] [2023-11-29 02:06:54,438 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:06:54,438 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:54,438 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:54,439 INFO L229 MonitoredProcess]: Starting monitored process 21 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:54,439 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2023-11-29 02:06:54,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:54,589 INFO L262 TraceCheckSpWp]: Trace formula consists of 448 conjuncts, 72 conjunts are in the unsatisfiable core [2023-11-29 02:06:54,592 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:55,027 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 121 proven. 299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:55,027 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:06:55,583 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 02:06:55,860 INFO L134 CoverageAnalysis]: Checked inductivity of 420 backedges. 121 proven. 299 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:55,861 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2061060167] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:06:55,861 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:06:55,861 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [27, 28, 28] total 56 [2023-11-29 02:06:55,861 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682221425] [2023-11-29 02:06:55,861 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:06:55,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 57 states [2023-11-29 02:06:55,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:06:55,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 57 interpolants. [2023-11-29 02:06:55,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=423, Invalid=2769, Unknown=0, NotChecked=0, Total=3192 [2023-11-29 02:06:55,862 INFO L87 Difference]: Start difference. First operand 80 states and 81 transitions. Second operand has 57 states, 56 states have (on average 2.875) internal successors, (161), 57 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:56,864 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:06:56,864 INFO L93 Difference]: Finished difference Result 87 states and 88 transitions. [2023-11-29 02:06:56,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2023-11-29 02:06:56,865 INFO L78 Accepts]: Start accepts. Automaton has has 57 states, 56 states have (on average 2.875) internal successors, (161), 57 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 79 [2023-11-29 02:06:56,865 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:06:56,865 INFO L225 Difference]: With dead ends: 87 [2023-11-29 02:06:56,865 INFO L226 Difference]: Without dead ends: 87 [2023-11-29 02:06:56,866 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 198 GetRequests, 115 SyntacticMatches, 13 SemanticMatches, 70 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2071 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=627, Invalid=4485, Unknown=0, NotChecked=0, Total=5112 [2023-11-29 02:06:56,866 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 130 mSDsluCounter, 289 mSDsCounter, 0 mSdLazyCounter, 1507 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 130 SdHoareTripleChecker+Valid, 305 SdHoareTripleChecker+Invalid, 1508 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1507 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:06:56,867 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [130 Valid, 305 Invalid, 1508 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1507 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-29 02:06:56,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2023-11-29 02:06:56,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 84. [2023-11-29 02:06:56,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 84 states, 83 states have (on average 1.0240963855421688) internal successors, (85), 83 states have internal predecessors, (85), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:56,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 85 transitions. [2023-11-29 02:06:56,868 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 85 transitions. Word has length 79 [2023-11-29 02:06:56,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:06:56,869 INFO L495 AbstractCegarLoop]: Abstraction has 84 states and 85 transitions. [2023-11-29 02:06:56,869 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 57 states, 56 states have (on average 2.875) internal successors, (161), 57 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:06:56,869 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 85 transitions. [2023-11-29 02:06:56,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 84 [2023-11-29 02:06:56,869 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:06:56,869 INFO L195 NwaCegarLoop]: trace histogram [13, 13, 13, 13, 12, 12, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:06:56,875 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2023-11-29 02:06:57,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2023-11-29 02:06:57,070 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 02:06:57,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:06:57,070 INFO L85 PathProgramCache]: Analyzing trace with hash 859732416, now seen corresponding path program 20 times [2023-11-29 02:06:57,070 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:06:57,070 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966300801] [2023-11-29 02:06:57,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:06:57,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:06:57,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:06:58,089 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 37 proven. 432 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:06:58,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:06:58,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966300801] [2023-11-29 02:06:58,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966300801] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:06:58,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504655541] [2023-11-29 02:06:58,089 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:06:58,089 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:06:58,089 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:06:58,090 INFO L229 MonitoredProcess]: Starting monitored process 22 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:06:58,091 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2023-11-29 02:06:58,213 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:06:58,213 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:06:58,216 INFO L262 TraceCheckSpWp]: Trace formula consists of 468 conjuncts, 82 conjunts are in the unsatisfiable core [2023-11-29 02:06:58,219 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:06:58,536 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 02:06:59,983 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:06:59,984 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 32 treesize of output 29 [2023-11-29 02:07:00,197 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 121 proven. 348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:00,197 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:07:01,587 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 02:07:01,591 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 02:07:01,596 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 02:07:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 469 backedges. 121 proven. 348 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:01,932 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [504655541] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:07:01,932 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:07:01,932 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 31, 31] total 78 [2023-11-29 02:07:01,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256357030] [2023-11-29 02:07:01,932 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:07:01,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 78 states [2023-11-29 02:07:01,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:07:01,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 78 interpolants. [2023-11-29 02:07:01,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=458, Invalid=5548, Unknown=0, NotChecked=0, Total=6006 [2023-11-29 02:07:01,935 INFO L87 Difference]: Start difference. First operand 84 states and 85 transitions. Second operand has 78 states, 78 states have (on average 2.7948717948717947) internal successors, (218), 78 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:09,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:07:09,683 INFO L93 Difference]: Finished difference Result 146 states and 147 transitions. [2023-11-29 02:07:09,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 52 states. [2023-11-29 02:07:09,683 INFO L78 Accepts]: Start accepts. Automaton has has 78 states, 78 states have (on average 2.7948717948717947) internal successors, (218), 78 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 83 [2023-11-29 02:07:09,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:07:09,684 INFO L225 Difference]: With dead ends: 146 [2023-11-29 02:07:09,684 INFO L226 Difference]: Without dead ends: 94 [2023-11-29 02:07:09,685 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 231 GetRequests, 106 SyntacticMatches, 13 SemanticMatches, 112 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2573 ImplicationChecksByTransitivity, 9.2s TimeCoverageRelationStatistics Valid=1012, Invalid=11869, Unknown=1, NotChecked=0, Total=12882 [2023-11-29 02:07:09,685 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 185 mSDsluCounter, 522 mSDsCounter, 0 mSdLazyCounter, 2659 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 185 SdHoareTripleChecker+Valid, 539 SdHoareTripleChecker+Invalid, 2661 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 2659 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:07:09,686 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [185 Valid, 539 Invalid, 2661 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 2659 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 02:07:09,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2023-11-29 02:07:09,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2023-11-29 02:07:09,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 1.0224719101123596) internal successors, (91), 89 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:09,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 91 transitions. [2023-11-29 02:07:09,688 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 91 transitions. Word has length 83 [2023-11-29 02:07:09,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:07:09,688 INFO L495 AbstractCegarLoop]: Abstraction has 90 states and 91 transitions. [2023-11-29 02:07:09,688 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 78 states, 78 states have (on average 2.7948717948717947) internal successors, (218), 78 states have internal predecessors, (218), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:09,689 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 91 transitions. [2023-11-29 02:07:09,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 90 [2023-11-29 02:07:09,689 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:07:09,689 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 13, 13, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:07:09,695 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2023-11-29 02:07:09,890 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2023-11-29 02:07:09,890 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 02:07:09,890 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:07:09,890 INFO L85 PathProgramCache]: Analyzing trace with hash -1431221171, now seen corresponding path program 21 times [2023-11-29 02:07:09,890 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:07:09,890 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234347835] [2023-11-29 02:07:09,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:09,890 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:07:09,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:11,020 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 40 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:11,020 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:07:11,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234347835] [2023-11-29 02:07:11,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234347835] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:07:11,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [792948824] [2023-11-29 02:07:11,021 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:07:11,021 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:07:11,021 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:07:11,022 INFO L229 MonitoredProcess]: Starting monitored process 23 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:07:11,024 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2023-11-29 02:07:11,464 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 15 check-sat command(s) [2023-11-29 02:07:11,464 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:07:11,468 INFO L262 TraceCheckSpWp]: Trace formula consists of 501 conjuncts, 97 conjunts are in the unsatisfiable core [2023-11-29 02:07:11,471 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:07:11,906 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 02:07:12,013 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 40 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:12,013 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:07:12,088 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 02:07:12,090 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 02:07:12,200 INFO L134 CoverageAnalysis]: Checked inductivity of 547 backedges. 40 proven. 507 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:12,200 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [792948824] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:07:12,200 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:07:12,200 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [33, 33, 33] total 52 [2023-11-29 02:07:12,201 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483126571] [2023-11-29 02:07:12,201 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:07:12,201 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 52 states [2023-11-29 02:07:12,201 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:07:12,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 52 interpolants. [2023-11-29 02:07:12,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=2520, Unknown=0, NotChecked=0, Total=2652 [2023-11-29 02:07:12,202 INFO L87 Difference]: Start difference. First operand 90 states and 91 transitions. Second operand has 52 states, 52 states have (on average 2.423076923076923) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:14,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:07:14,004 INFO L93 Difference]: Finished difference Result 149 states and 150 transitions. [2023-11-29 02:07:14,004 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 47 states. [2023-11-29 02:07:14,004 INFO L78 Accepts]: Start accepts. Automaton has has 52 states, 52 states have (on average 2.423076923076923) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 89 [2023-11-29 02:07:14,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:07:14,005 INFO L225 Difference]: With dead ends: 149 [2023-11-29 02:07:14,005 INFO L226 Difference]: Without dead ends: 93 [2023-11-29 02:07:14,006 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 238 GetRequests, 159 SyntacticMatches, 0 SemanticMatches, 79 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=318, Invalid=6162, Unknown=0, NotChecked=0, Total=6480 [2023-11-29 02:07:14,007 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 115 mSDsluCounter, 565 mSDsCounter, 0 mSdLazyCounter, 2775 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 115 SdHoareTripleChecker+Valid, 582 SdHoareTripleChecker+Invalid, 2788 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 2775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:07:14,007 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [115 Valid, 582 Invalid, 2788 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 2775 Invalid, 0 Unknown, 0 Unchecked, 1.0s Time] [2023-11-29 02:07:14,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2023-11-29 02:07:14,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 92. [2023-11-29 02:07:14,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 1.021978021978022) internal successors, (93), 91 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:14,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 93 transitions. [2023-11-29 02:07:14,009 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 93 transitions. Word has length 89 [2023-11-29 02:07:14,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:07:14,009 INFO L495 AbstractCegarLoop]: Abstraction has 92 states and 93 transitions. [2023-11-29 02:07:14,009 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 52 states, 52 states have (on average 2.423076923076923) internal successors, (126), 52 states have internal predecessors, (126), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:14,009 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 93 transitions. [2023-11-29 02:07:14,009 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 92 [2023-11-29 02:07:14,009 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:07:14,010 INFO L195 NwaCegarLoop]: trace histogram [14, 14, 14, 14, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:07:14,016 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Ended with exit code 0 [2023-11-29 02:07:14,210 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,23 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:07:14,210 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 02:07:14,210 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:07:14,210 INFO L85 PathProgramCache]: Analyzing trace with hash 461571495, now seen corresponding path program 22 times [2023-11-29 02:07:14,210 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:07:14,211 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [342019120] [2023-11-29 02:07:14,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:14,211 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:07:14,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:15,511 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 144 proven. 430 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:15,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:07:15,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [342019120] [2023-11-29 02:07:15,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [342019120] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:07:15,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220968895] [2023-11-29 02:07:15,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:07:15,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:07:15,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:07:15,512 INFO L229 MonitoredProcess]: Starting monitored process 24 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:07:15,515 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2023-11-29 02:07:15,776 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:07:15,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:07:15,780 INFO L262 TraceCheckSpWp]: Trace formula consists of 514 conjuncts, 83 conjunts are in the unsatisfiable core [2023-11-29 02:07:15,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:07:15,785 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:07:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 169 proven. 405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:16,365 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:07:17,734 INFO L134 CoverageAnalysis]: Checked inductivity of 574 backedges. 169 proven. 405 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:17,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220968895] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:07:17,734 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:07:17,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [31, 32, 32] total 79 [2023-11-29 02:07:17,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709738021] [2023-11-29 02:07:17,735 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:07:17,735 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 80 states [2023-11-29 02:07:17,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:07:17,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 80 interpolants. [2023-11-29 02:07:17,737 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=878, Invalid=5442, Unknown=0, NotChecked=0, Total=6320 [2023-11-29 02:07:17,737 INFO L87 Difference]: Start difference. First operand 92 states and 93 transitions. Second operand has 80 states, 79 states have (on average 2.7341772151898733) internal successors, (216), 80 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 02:07:19,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:07:19,218 INFO L93 Difference]: Finished difference Result 99 states and 100 transitions. [2023-11-29 02:07:19,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2023-11-29 02:07:19,218 INFO L78 Accepts]: Start accepts. Automaton has has 80 states, 79 states have (on average 2.7341772151898733) internal successors, (216), 80 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) Word has length 91 [2023-11-29 02:07:19,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:07:19,219 INFO L225 Difference]: With dead ends: 99 [2023-11-29 02:07:19,219 INFO L226 Difference]: Without dead ends: 99 [2023-11-29 02:07:19,220 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 228 GetRequests, 133 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 02:07:19,220 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 144 mSDsluCounter, 360 mSDsCounter, 0 mSdLazyCounter, 1914 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 144 SdHoareTripleChecker+Valid, 378 SdHoareTripleChecker+Invalid, 1915 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 1914 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:07:19,220 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [144 Valid, 378 Invalid, 1915 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 1914 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-29 02:07:19,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2023-11-29 02:07:19,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 96. [2023-11-29 02:07:19,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 1.0210526315789474) internal successors, (97), 95 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 02:07:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 97 transitions. [2023-11-29 02:07:19,222 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 97 transitions. Word has length 91 [2023-11-29 02:07:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:07:19,222 INFO L495 AbstractCegarLoop]: Abstraction has 96 states and 97 transitions. [2023-11-29 02:07:19,223 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 80 states, 79 states have (on average 2.7341772151898733) internal successors, (216), 80 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 02:07:19,223 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 97 transitions. [2023-11-29 02:07:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 96 [2023-11-29 02:07:19,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:07:19,223 INFO L195 NwaCegarLoop]: trace histogram [15, 15, 15, 15, 14, 14, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:07:19,230 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Ended with exit code 0 [2023-11-29 02:07:19,424 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2023-11-29 02:07:19,424 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 02:07:19,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:07:19,424 INFO L85 PathProgramCache]: Analyzing trace with hash -206879526, now seen corresponding path program 23 times [2023-11-29 02:07:19,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:07:19,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [649347152] [2023-11-29 02:07:19,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:19,425 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:07:19,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:20,727 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 43 proven. 588 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:20,727 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:07:20,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [649347152] [2023-11-29 02:07:20,727 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [649347152] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:07:20,727 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581075984] [2023-11-29 02:07:20,727 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:07:20,727 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:07:20,727 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:07:20,728 INFO L229 MonitoredProcess]: Starting monitored process 25 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:07:20,730 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2023-11-29 02:07:20,988 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 16 check-sat command(s) [2023-11-29 02:07:20,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:07:20,992 INFO L262 TraceCheckSpWp]: Trace formula consists of 534 conjuncts, 96 conjunts are in the unsatisfiable core [2023-11-29 02:07:20,994 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:07:20,998 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:07:21,537 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 02:07:23,045 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:07:23,045 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 32 treesize of output 25 [2023-11-29 02:07:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 169 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:23,251 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:07:24,951 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 02:07:24,955 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 02:07:26,945 INFO L134 CoverageAnalysis]: Checked inductivity of 631 backedges. 169 proven. 462 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:26,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [581075984] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:07:26,945 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:07:26,946 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 34, 34] total 101 [2023-11-29 02:07:26,946 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [885485436] [2023-11-29 02:07:26,946 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:07:26,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 101 states [2023-11-29 02:07:26,947 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:07:26,948 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 101 interpolants. [2023-11-29 02:07:26,948 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=893, Invalid=9207, Unknown=0, NotChecked=0, Total=10100 [2023-11-29 02:07:26,948 INFO L87 Difference]: Start difference. First operand 96 states and 97 transitions. Second operand has 101 states, 101 states have (on average 2.782178217821782) internal successors, (281), 101 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:32,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:07:32,956 INFO L93 Difference]: Finished difference Result 166 states and 167 transitions. [2023-11-29 02:07:32,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 57 states. [2023-11-29 02:07:32,957 INFO L78 Accepts]: Start accepts. Automaton has has 101 states, 101 states have (on average 2.782178217821782) internal successors, (281), 101 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 95 [2023-11-29 02:07:32,957 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:07:32,957 INFO L225 Difference]: With dead ends: 166 [2023-11-29 02:07:32,958 INFO L226 Difference]: Without dead ends: 106 [2023-11-29 02:07:32,959 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 262 GetRequests, 124 SyntacticMatches, 0 SemanticMatches, 138 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3316 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=1636, Invalid=17824, Unknown=0, NotChecked=0, Total=19460 [2023-11-29 02:07:32,959 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 339 mSDsluCounter, 623 mSDsCounter, 0 mSdLazyCounter, 3185 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 339 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 3186 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3185 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:07:32,959 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [339 Valid, 642 Invalid, 3186 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3185 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-29 02:07:32,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2023-11-29 02:07:32,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 102. [2023-11-29 02:07:32,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 1.0198019801980198) internal successors, (103), 101 states have internal predecessors, (103), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:32,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 103 transitions. [2023-11-29 02:07:32,962 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 103 transitions. Word has length 95 [2023-11-29 02:07:32,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:07:32,962 INFO L495 AbstractCegarLoop]: Abstraction has 102 states and 103 transitions. [2023-11-29 02:07:32,963 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 101 states, 101 states have (on average 2.782178217821782) internal successors, (281), 101 states have internal predecessors, (281), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:32,963 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 103 transitions. [2023-11-29 02:07:32,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 102 [2023-11-29 02:07:32,963 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:07:32,963 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 15, 15, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:07:32,969 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Ended with exit code 0 [2023-11-29 02:07:33,164 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2023-11-29 02:07:33,164 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 02:07:33,164 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:07:33,164 INFO L85 PathProgramCache]: Analyzing trace with hash -275774617, now seen corresponding path program 24 times [2023-11-29 02:07:33,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:07:33,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267849862] [2023-11-29 02:07:33,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:33,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:07:33,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:34,549 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 46 proven. 675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:34,549 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:07:34,549 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267849862] [2023-11-29 02:07:34,549 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [267849862] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:07:34,550 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [932416210] [2023-11-29 02:07:34,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:07:34,550 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:07:34,550 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:07:34,550 INFO L229 MonitoredProcess]: Starting monitored process 26 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:07:34,551 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2023-11-29 02:07:35,266 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 17 check-sat command(s) [2023-11-29 02:07:35,266 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:07:35,272 INFO L262 TraceCheckSpWp]: Trace formula consists of 567 conjuncts, 109 conjunts are in the unsatisfiable core [2023-11-29 02:07:35,275 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:07:35,856 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 02:07:35,974 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 46 proven. 675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:35,974 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:07:36,053 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 02:07:36,054 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 02:07:36,170 INFO L134 CoverageAnalysis]: Checked inductivity of 721 backedges. 46 proven. 675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:36,171 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [932416210] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:07:36,171 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:07:36,171 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [37, 37, 37] total 58 [2023-11-29 02:07:36,171 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1097117244] [2023-11-29 02:07:36,171 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:07:36,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 58 states [2023-11-29 02:07:36,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:07:36,172 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 58 interpolants. [2023-11-29 02:07:36,172 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=146, Invalid=3160, Unknown=0, NotChecked=0, Total=3306 [2023-11-29 02:07:36,173 INFO L87 Difference]: Start difference. First operand 102 states and 103 transitions. Second operand has 58 states, 58 states have (on average 2.4482758620689653) internal successors, (142), 58 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 02:07:38,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:07:38,539 INFO L93 Difference]: Finished difference Result 169 states and 170 transitions. [2023-11-29 02:07:38,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 53 states. [2023-11-29 02:07:38,539 INFO L78 Accepts]: Start accepts. Automaton has has 58 states, 58 states have (on average 2.4482758620689653) internal successors, (142), 58 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) Word has length 101 [2023-11-29 02:07:38,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:07:38,540 INFO L225 Difference]: With dead ends: 169 [2023-11-29 02:07:38,540 INFO L226 Difference]: Without dead ends: 105 [2023-11-29 02:07:38,541 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 270 GetRequests, 181 SyntacticMatches, 0 SemanticMatches, 89 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 802 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=356, Invalid=7834, Unknown=0, NotChecked=0, Total=8190 [2023-11-29 02:07:38,541 INFO L413 NwaCegarLoop]: 19 mSDtfsCounter, 193 mSDsluCounter, 754 mSDsCounter, 0 mSdLazyCounter, 3710 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 193 SdHoareTripleChecker+Valid, 773 SdHoareTripleChecker+Invalid, 3725 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 3710 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:07:38,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [193 Valid, 773 Invalid, 3725 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 3710 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-29 02:07:38,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2023-11-29 02:07:38,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 104. [2023-11-29 02:07:38,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 1.0194174757281553) internal successors, (105), 103 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 02:07:38,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 105 transitions. [2023-11-29 02:07:38,544 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 105 transitions. Word has length 101 [2023-11-29 02:07:38,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:07:38,544 INFO L495 AbstractCegarLoop]: Abstraction has 104 states and 105 transitions. [2023-11-29 02:07:38,544 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 58 states, 58 states have (on average 2.4482758620689653) internal successors, (142), 58 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 02:07:38,544 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 105 transitions. [2023-11-29 02:07:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 104 [2023-11-29 02:07:38,545 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:07:38,545 INFO L195 NwaCegarLoop]: trace histogram [16, 16, 16, 16, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:07:38,551 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Ended with exit code 0 [2023-11-29 02:07:38,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2023-11-29 02:07:38,746 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 02:07:38,746 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:07:38,746 INFO L85 PathProgramCache]: Analyzing trace with hash 950306241, now seen corresponding path program 25 times [2023-11-29 02:07:38,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:07:38,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502533733] [2023-11-29 02:07:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:38,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:07:38,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:40,220 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 196 proven. 556 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:40,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:07:40,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502533733] [2023-11-29 02:07:40,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502533733] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:07:40,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800132881] [2023-11-29 02:07:40,221 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:07:40,221 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:07:40,221 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:07:40,222 INFO L229 MonitoredProcess]: Starting monitored process 27 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:07:40,222 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2023-11-29 02:07:40,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:40,372 INFO L262 TraceCheckSpWp]: Trace formula consists of 580 conjuncts, 92 conjunts are in the unsatisfiable core [2023-11-29 02:07:40,375 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:07:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 225 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:41,081 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:07:41,949 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 02:07:42,411 INFO L134 CoverageAnalysis]: Checked inductivity of 752 backedges. 225 proven. 527 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:42,411 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1800132881] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:07:42,411 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:07:42,411 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [35, 36, 36] total 72 [2023-11-29 02:07:42,412 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2053386366] [2023-11-29 02:07:42,412 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:07:42,412 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 73 states [2023-11-29 02:07:42,412 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:07:42,413 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 73 interpolants. [2023-11-29 02:07:42,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=683, Invalid=4573, Unknown=0, NotChecked=0, Total=5256 [2023-11-29 02:07:42,414 INFO L87 Difference]: Start difference. First operand 104 states and 105 transitions. Second operand has 73 states, 72 states have (on average 2.9027777777777777) internal successors, (209), 73 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:43,902 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:07:43,903 INFO L93 Difference]: Finished difference Result 111 states and 112 transitions. [2023-11-29 02:07:43,903 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2023-11-29 02:07:43,903 INFO L78 Accepts]: Start accepts. Automaton has has 73 states, 72 states have (on average 2.9027777777777777) internal successors, (209), 73 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 103 [2023-11-29 02:07:43,903 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:07:43,904 INFO L225 Difference]: With dead ends: 111 [2023-11-29 02:07:43,904 INFO L226 Difference]: Without dead ends: 111 [2023-11-29 02:07:43,905 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 258 GetRequests, 151 SyntacticMatches, 17 SemanticMatches, 90 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3565 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=981, Invalid=7391, Unknown=0, NotChecked=0, Total=8372 [2023-11-29 02:07:43,905 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 84 mSDsluCounter, 374 mSDsCounter, 0 mSdLazyCounter, 2039 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 84 SdHoareTripleChecker+Valid, 394 SdHoareTripleChecker+Invalid, 2040 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 2039 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:07:43,905 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [84 Valid, 394 Invalid, 2040 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 2039 Invalid, 0 Unknown, 0 Unchecked, 0.9s Time] [2023-11-29 02:07:43,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2023-11-29 02:07:43,907 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 108. [2023-11-29 02:07:43,907 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 1.0186915887850467) internal successors, (109), 107 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:43,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 109 transitions. [2023-11-29 02:07:43,908 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 109 transitions. Word has length 103 [2023-11-29 02:07:43,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:07:43,908 INFO L495 AbstractCegarLoop]: Abstraction has 108 states and 109 transitions. [2023-11-29 02:07:43,908 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 73 states, 72 states have (on average 2.9027777777777777) internal successors, (209), 73 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:43,908 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 109 transitions. [2023-11-29 02:07:43,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 108 [2023-11-29 02:07:43,909 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:07:43,909 INFO L195 NwaCegarLoop]: trace histogram [17, 17, 17, 17, 16, 16, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:07:43,914 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2023-11-29 02:07:44,109 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2023-11-29 02:07:44,109 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 02:07:44,110 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:07:44,110 INFO L85 PathProgramCache]: Analyzing trace with hash -1518655500, now seen corresponding path program 26 times [2023-11-29 02:07:44,110 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:07:44,110 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [931108638] [2023-11-29 02:07:44,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:44,110 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:07:44,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:07:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 49 proven. 768 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:45,570 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:07:45,570 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [931108638] [2023-11-29 02:07:45,570 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [931108638] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:07:45,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956806412] [2023-11-29 02:07:45,571 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:07:45,571 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:07:45,571 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:07:45,572 INFO L229 MonitoredProcess]: Starting monitored process 28 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:07:45,573 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2023-11-29 02:07:45,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:07:45,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:07:45,743 INFO L262 TraceCheckSpWp]: Trace formula consists of 600 conjuncts, 102 conjunts are in the unsatisfiable core [2023-11-29 02:07:45,746 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:07:46,382 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 02:07:48,713 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:07:48,714 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 32 treesize of output 29 [2023-11-29 02:07:49,000 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 225 proven. 592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:49,000 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:07:51,113 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 02:07:51,118 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 02:07:51,123 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 02:07:51,634 INFO L134 CoverageAnalysis]: Checked inductivity of 817 backedges. 225 proven. 592 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:07:51,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [956806412] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:07:51,634 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:07:51,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 98 [2023-11-29 02:07:51,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095324465] [2023-11-29 02:07:51,634 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:07:51,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-11-29 02:07:51,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:07:51,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-11-29 02:07:51,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=688, Invalid=8818, Unknown=0, NotChecked=0, Total=9506 [2023-11-29 02:07:51,636 INFO L87 Difference]: Start difference. First operand 108 states and 109 transitions. Second operand has 98 states, 98 states have (on average 2.877551020408163) internal successors, (282), 98 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:55,544 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.27s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:07:59,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:07:59,668 INFO L93 Difference]: Finished difference Result 186 states and 187 transitions. [2023-11-29 02:07:59,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 64 states. [2023-11-29 02:07:59,669 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 98 states have (on average 2.877551020408163) internal successors, (282), 98 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 107 [2023-11-29 02:07:59,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:07:59,669 INFO L225 Difference]: With dead ends: 186 [2023-11-29 02:07:59,670 INFO L226 Difference]: Without dead ends: 118 [2023-11-29 02:07:59,671 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 295 GetRequests, 138 SyntacticMatches, 17 SemanticMatches, 140 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4097 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=1459, Invalid=18563, Unknown=0, NotChecked=0, Total=20022 [2023-11-29 02:07:59,671 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 233 mSDsluCounter, 786 mSDsCounter, 0 mSdLazyCounter, 4141 mSolverCounterSat, 14 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 233 SdHoareTripleChecker+Valid, 807 SdHoareTripleChecker+Invalid, 4157 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 4141 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:07:59,672 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [233 Valid, 807 Invalid, 4157 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 4141 Invalid, 2 Unknown, 0 Unchecked, 4.5s Time] [2023-11-29 02:07:59,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2023-11-29 02:07:59,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 114. [2023-11-29 02:07:59,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 114 states, 113 states have (on average 1.0176991150442478) internal successors, (115), 113 states have internal predecessors, (115), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 115 transitions. [2023-11-29 02:07:59,675 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 115 transitions. Word has length 107 [2023-11-29 02:07:59,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:07:59,675 INFO L495 AbstractCegarLoop]: Abstraction has 114 states and 115 transitions. [2023-11-29 02:07:59,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 98 states have (on average 2.877551020408163) internal successors, (282), 98 states have internal predecessors, (282), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:07:59,675 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 115 transitions. [2023-11-29 02:07:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 114 [2023-11-29 02:07:59,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:07:59,676 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 17, 17, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:07:59,682 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Ended with exit code 0 [2023-11-29 02:07:59,876 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2023-11-29 02:07:59,877 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 02:07:59,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:07:59,877 INFO L85 PathProgramCache]: Analyzing trace with hash 541086337, now seen corresponding path program 27 times [2023-11-29 02:07:59,877 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:07:59,877 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1264656669] [2023-11-29 02:07:59,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:07:59,877 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:07:59,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:01,572 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 52 proven. 867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:08:01,572 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:08:01,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1264656669] [2023-11-29 02:08:01,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1264656669] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:08:01,572 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1171894361] [2023-11-29 02:08:01,572 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:08:01,572 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:01,572 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:08:01,573 INFO L229 MonitoredProcess]: Starting monitored process 29 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:08:01,574 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2023-11-29 02:08:02,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 19 check-sat command(s) [2023-11-29 02:08:02,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:08:02,130 INFO L262 TraceCheckSpWp]: Trace formula consists of 633 conjuncts, 123 conjunts are in the unsatisfiable core [2023-11-29 02:08:02,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:08:02,798 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 02:08:02,977 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 52 proven. 867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:08:02,977 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:08:03,079 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 02:08:03,081 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 02:08:03,207 INFO L134 CoverageAnalysis]: Checked inductivity of 919 backedges. 52 proven. 867 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:08:03,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1171894361] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:08:03,207 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:08:03,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [41, 41, 41] total 65 [2023-11-29 02:08:03,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [681314906] [2023-11-29 02:08:03,207 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:08:03,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 65 states [2023-11-29 02:08:03,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:08:03,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 65 interpolants. [2023-11-29 02:08:03,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=164, Invalid=3996, Unknown=0, NotChecked=0, Total=4160 [2023-11-29 02:08:03,209 INFO L87 Difference]: Start difference. First operand 114 states and 115 transitions. Second operand has 65 states, 65 states have (on average 2.4615384615384617) internal successors, (160), 65 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 02:08:06,025 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:08:06,025 INFO L93 Difference]: Finished difference Result 189 states and 190 transitions. [2023-11-29 02:08:06,025 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-29 02:08:06,026 INFO L78 Accepts]: Start accepts. Automaton has has 65 states, 65 states have (on average 2.4615384615384617) internal successors, (160), 65 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) Word has length 113 [2023-11-29 02:08:06,026 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:08:06,027 INFO L225 Difference]: With dead ends: 189 [2023-11-29 02:08:06,027 INFO L226 Difference]: Without dead ends: 117 [2023-11-29 02:08:06,027 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 302 GetRequests, 202 SyntacticMatches, 0 SemanticMatches, 100 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1051 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=399, Invalid=9903, Unknown=0, NotChecked=0, Total=10302 [2023-11-29 02:08:06,028 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 145 mSDsluCounter, 949 mSDsCounter, 0 mSdLazyCounter, 4795 mSolverCounterSat, 17 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 145 SdHoareTripleChecker+Valid, 970 SdHoareTripleChecker+Invalid, 4812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 17 IncrementalHoareTripleChecker+Valid, 4795 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:08:06,028 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [145 Valid, 970 Invalid, 4812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [17 Valid, 4795 Invalid, 0 Unknown, 0 Unchecked, 1.7s Time] [2023-11-29 02:08:06,028 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2023-11-29 02:08:06,030 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 116. [2023-11-29 02:08:06,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 116 states, 115 states have (on average 1.017391304347826) internal successors, (117), 115 states have internal predecessors, (117), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:06,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 117 transitions. [2023-11-29 02:08:06,031 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 117 transitions. Word has length 113 [2023-11-29 02:08:06,031 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:08:06,031 INFO L495 AbstractCegarLoop]: Abstraction has 116 states and 117 transitions. [2023-11-29 02:08:06,031 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 65 states, 65 states have (on average 2.4615384615384617) internal successors, (160), 65 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 02:08:06,031 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 117 transitions. [2023-11-29 02:08:06,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 116 [2023-11-29 02:08:06,032 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:08:06,032 INFO L195 NwaCegarLoop]: trace histogram [18, 18, 18, 18, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:08:06,038 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Ended with exit code 0 [2023-11-29 02:08:06,232 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2023-11-29 02:08:06,233 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 02:08:06,233 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:08:06,233 INFO L85 PathProgramCache]: Analyzing trace with hash -827187749, now seen corresponding path program 28 times [2023-11-29 02:08:06,233 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:08:06,233 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975112394] [2023-11-29 02:08:06,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:06,233 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:08:06,272 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:08,018 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 256 proven. 698 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:08:08,019 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:08:08,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975112394] [2023-11-29 02:08:08,019 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975112394] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:08:08,019 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2137288259] [2023-11-29 02:08:08,019 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:08:08,019 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:08,019 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:08:08,020 INFO L229 MonitoredProcess]: Starting monitored process 30 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:08:08,021 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2023-11-29 02:08:08,340 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:08:08,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:08:08,345 INFO L262 TraceCheckSpWp]: Trace formula consists of 646 conjuncts, 106 conjunts are in the unsatisfiable core [2023-11-29 02:08:08,348 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:08:08,353 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:08:09,226 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 289 proven. 665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:08:09,226 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:08:11,480 INFO L134 CoverageAnalysis]: Checked inductivity of 954 backedges. 289 proven. 665 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:08:11,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2137288259] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:08:11,481 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:08:11,481 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [39, 39, 39] total 97 [2023-11-29 02:08:11,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148432393] [2023-11-29 02:08:11,481 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:08:11,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 98 states [2023-11-29 02:08:11,482 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:08:11,483 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 98 interpolants. [2023-11-29 02:08:11,483 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1361, Invalid=8145, Unknown=0, NotChecked=0, Total=9506 [2023-11-29 02:08:11,484 INFO L87 Difference]: Start difference. First operand 116 states and 117 transitions. Second operand has 98 states, 97 states have (on average 2.804123711340206) internal successors, (272), 98 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:13,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:08:13,542 INFO L93 Difference]: Finished difference Result 123 states and 124 transitions. [2023-11-29 02:08:13,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2023-11-29 02:08:13,542 INFO L78 Accepts]: Start accepts. Automaton has has 98 states, 97 states have (on average 2.804123711340206) internal successors, (272), 98 states have internal predecessors, (272), 0 states have call successors, (0), 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 115 [2023-11-29 02:08:13,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:08:13,543 INFO L225 Difference]: With dead ends: 123 [2023-11-29 02:08:13,543 INFO L226 Difference]: Without dead ends: 123 [2023-11-29 02:08:13,544 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 289 GetRequests, 171 SyntacticMatches, 0 SemanticMatches, 118 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4617 ImplicationChecksByTransitivity, 4.1s TimeCoverageRelationStatistics Valid=2153, Invalid=12127, Unknown=0, NotChecked=0, Total=14280 [2023-11-29 02:08:13,544 INFO L413 NwaCegarLoop]: 22 mSDtfsCounter, 666 mSDsluCounter, 444 mSDsCounter, 0 mSdLazyCounter, 2360 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 666 SdHoareTripleChecker+Valid, 466 SdHoareTripleChecker+Invalid, 2368 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 2360 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:08:13,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [666 Valid, 466 Invalid, 2368 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 2360 Invalid, 0 Unknown, 0 Unchecked, 1.1s Time] [2023-11-29 02:08:13,545 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2023-11-29 02:08:13,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 120. [2023-11-29 02:08:13,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 120 states, 119 states have (on average 1.0168067226890756) internal successors, (121), 119 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:13,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 121 transitions. [2023-11-29 02:08:13,548 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 121 transitions. Word has length 115 [2023-11-29 02:08:13,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:08:13,548 INFO L495 AbstractCegarLoop]: Abstraction has 120 states and 121 transitions. [2023-11-29 02:08:13,548 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 98 states, 97 states have (on average 2.804123711340206) internal successors, (272), 98 states have internal predecessors, (272), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:13,548 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 121 transitions. [2023-11-29 02:08:13,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 120 [2023-11-29 02:08:13,549 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:08:13,549 INFO L195 NwaCegarLoop]: trace histogram [19, 19, 19, 19, 18, 18, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:08:13,554 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2023-11-29 02:08:13,749 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,30 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:13,749 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 02:08:13,750 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:08:13,750 INFO L85 PathProgramCache]: Analyzing trace with hash -865393906, now seen corresponding path program 29 times [2023-11-29 02:08:13,750 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:08:13,750 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154047064] [2023-11-29 02:08:13,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:13,750 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:08:13,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:15,509 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 55 proven. 972 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:08:15,510 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:08:15,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154047064] [2023-11-29 02:08:15,510 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [154047064] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:08:15,510 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1545601859] [2023-11-29 02:08:15,510 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:08:15,510 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:15,510 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:08:15,511 INFO L229 MonitoredProcess]: Starting monitored process 31 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:08:15,513 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2023-11-29 02:08:15,946 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 20 check-sat command(s) [2023-11-29 02:08:15,946 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:08:15,951 INFO L262 TraceCheckSpWp]: Trace formula consists of 666 conjuncts, 116 conjunts are in the unsatisfiable core [2023-11-29 02:08:15,954 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:08:15,958 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:08:16,772 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 02:08:23,767 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:08:23,767 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 32 treesize of output 25 [2023-11-29 02:08:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 289 proven. 736 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:08:24,025 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:08:26,372 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 02:08:26,375 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 02:08:29,459 INFO L134 CoverageAnalysis]: Checked inductivity of 1027 backedges. 289 proven. 738 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:08:29,459 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1545601859] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:08:29,459 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:08:29,459 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 42, 42] total 125 [2023-11-29 02:08:29,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1460148655] [2023-11-29 02:08:29,460 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:08:29,460 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 125 states [2023-11-29 02:08:29,460 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:08:29,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 125 interpolants. [2023-11-29 02:08:29,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1349, Invalid=14149, Unknown=2, NotChecked=0, Total=15500 [2023-11-29 02:08:29,462 INFO L87 Difference]: Start difference. First operand 120 states and 121 transitions. Second operand has 125 states, 125 states have (on average 2.824) internal successors, (353), 125 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:46,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:08:46,096 INFO L93 Difference]: Finished difference Result 206 states and 207 transitions. [2023-11-29 02:08:46,096 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 69 states. [2023-11-29 02:08:46,096 INFO L78 Accepts]: Start accepts. Automaton has has 125 states, 125 states have (on average 2.824) internal successors, (353), 125 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 119 [2023-11-29 02:08:46,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:08:46,097 INFO L225 Difference]: With dead ends: 206 [2023-11-29 02:08:46,097 INFO L226 Difference]: Without dead ends: 130 [2023-11-29 02:08:46,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 326 GetRequests, 156 SyntacticMatches, 0 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5105 ImplicationChecksByTransitivity, 24.6s TimeCoverageRelationStatistics Valid=2348, Invalid=27062, Unknown=2, NotChecked=0, Total=29412 [2023-11-29 02:08:46,100 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 265 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 4823 mSolverCounterSat, 1 mSolverCounterUnsat, 2 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 942 SdHoareTripleChecker+Invalid, 4826 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4823 IncrementalHoareTripleChecker+Invalid, 2 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:08:46,100 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 942 Invalid, 4826 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4823 Invalid, 2 Unknown, 0 Unchecked, 4.4s Time] [2023-11-29 02:08:46,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2023-11-29 02:08:46,102 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 126. [2023-11-29 02:08:46,103 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 126 states, 125 states have (on average 1.016) internal successors, (127), 125 states have internal predecessors, (127), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:46,103 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 127 transitions. [2023-11-29 02:08:46,103 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 127 transitions. Word has length 119 [2023-11-29 02:08:46,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:08:46,104 INFO L495 AbstractCegarLoop]: Abstraction has 126 states and 127 transitions. [2023-11-29 02:08:46,104 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 125 states, 125 states have (on average 2.824) internal successors, (353), 125 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:46,104 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 127 transitions. [2023-11-29 02:08:46,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 126 [2023-11-29 02:08:46,105 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:08:46,105 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 19, 19, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:08:46,111 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2023-11-29 02:08:46,305 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41,31 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:46,305 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 02:08:46,306 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:08:46,306 INFO L85 PathProgramCache]: Analyzing trace with hash 1446984091, now seen corresponding path program 30 times [2023-11-29 02:08:46,306 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:08:46,306 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117176355] [2023-11-29 02:08:46,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:46,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:08:46,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:48,383 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 58 proven. 1083 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:08:48,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:08:48,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117176355] [2023-11-29 02:08:48,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [117176355] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:08:48,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934440998] [2023-11-29 02:08:48,383 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:08:48,384 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:48,384 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:08:48,384 INFO L229 MonitoredProcess]: Starting monitored process 32 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:08:48,385 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2023-11-29 02:08:49,921 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 21 check-sat command(s) [2023-11-29 02:08:49,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:08:49,929 INFO L262 TraceCheckSpWp]: Trace formula consists of 699 conjuncts, 133 conjunts are in the unsatisfiable core [2023-11-29 02:08:49,932 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:08:50,817 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 02:08:50,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 58 proven. 1083 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:08:50,951 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:08:51,042 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 02:08:51,044 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 02:08:51,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1141 backedges. 58 proven. 1083 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:08:51,198 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1934440998] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:08:51,198 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:08:51,198 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [45, 45, 45] total 70 [2023-11-29 02:08:51,198 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571271912] [2023-11-29 02:08:51,198 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:08:51,199 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 70 states [2023-11-29 02:08:51,199 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:08:51,200 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 70 interpolants. [2023-11-29 02:08:51,200 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=174, Invalid=4656, Unknown=0, NotChecked=0, Total=4830 [2023-11-29 02:08:51,200 INFO L87 Difference]: Start difference. First operand 126 states and 127 transitions. Second operand has 70 states, 70 states have (on average 2.4857142857142858) internal successors, (174), 70 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:54,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:08:54,743 INFO L93 Difference]: Finished difference Result 209 states and 210 transitions. [2023-11-29 02:08:54,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 65 states. [2023-11-29 02:08:54,744 INFO L78 Accepts]: Start accepts. Automaton has has 70 states, 70 states have (on average 2.4857142857142858) internal successors, (174), 70 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 125 [2023-11-29 02:08:54,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:08:54,745 INFO L225 Difference]: With dead ends: 209 [2023-11-29 02:08:54,745 INFO L226 Difference]: Without dead ends: 129 [2023-11-29 02:08:54,746 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 334 GetRequests, 225 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 02:08:54,747 INFO L413 NwaCegarLoop]: 23 mSDtfsCounter, 162 mSDsluCounter, 1170 mSDsCounter, 0 mSdLazyCounter, 5806 mSolverCounterSat, 19 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 162 SdHoareTripleChecker+Valid, 1193 SdHoareTripleChecker+Invalid, 5825 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 19 IncrementalHoareTripleChecker+Valid, 5806 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:08:54,747 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [162 Valid, 1193 Invalid, 5825 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [19 Valid, 5806 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 02:08:54,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2023-11-29 02:08:54,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 128. [2023-11-29 02:08:54,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 128 states, 127 states have (on average 1.015748031496063) internal successors, (129), 127 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:54,750 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 129 transitions. [2023-11-29 02:08:54,750 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 129 transitions. Word has length 125 [2023-11-29 02:08:54,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:08:54,751 INFO L495 AbstractCegarLoop]: Abstraction has 128 states and 129 transitions. [2023-11-29 02:08:54,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 70 states, 70 states have (on average 2.4857142857142858) internal successors, (174), 70 states have internal predecessors, (174), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:08:54,751 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 129 transitions. [2023-11-29 02:08:54,751 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 128 [2023-11-29 02:08:54,751 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:08:54,752 INFO L195 NwaCegarLoop]: trace histogram [20, 20, 20, 20, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:08:54,758 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Ended with exit code 0 [2023-11-29 02:08:54,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,32 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:54,952 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 02:08:54,952 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:08:54,952 INFO L85 PathProgramCache]: Analyzing trace with hash -1553412619, now seen corresponding path program 31 times [2023-11-29 02:08:54,953 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:08:54,953 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719030279] [2023-11-29 02:08:54,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:08:54,953 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:08:54,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:56,737 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 324 proven. 856 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:08:56,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:08:56,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719030279] [2023-11-29 02:08:56,737 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1719030279] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:08:56,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [60858669] [2023-11-29 02:08:56,737 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:08:56,737 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:08:56,737 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:08:56,738 INFO L229 MonitoredProcess]: Starting monitored process 33 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:08:56,739 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2023-11-29 02:08:56,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:08:56,915 INFO L262 TraceCheckSpWp]: Trace formula consists of 712 conjuncts, 112 conjunts are in the unsatisfiable core [2023-11-29 02:08:56,917 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:08:57,852 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 361 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:08:57,853 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:08:58,912 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 02:08:59,489 INFO L134 CoverageAnalysis]: Checked inductivity of 1180 backedges. 361 proven. 819 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:08:59,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [60858669] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:08:59,489 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:08:59,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [43, 44, 44] total 88 [2023-11-29 02:08:59,489 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834528637] [2023-11-29 02:08:59,489 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:08:59,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 89 states [2023-11-29 02:08:59,490 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:08:59,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 89 interpolants. [2023-11-29 02:08:59,491 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1007, Invalid=6825, Unknown=0, NotChecked=0, Total=7832 [2023-11-29 02:08:59,492 INFO L87 Difference]: Start difference. First operand 128 states and 129 transitions. Second operand has 89 states, 88 states have (on average 2.9204545454545454) internal successors, (257), 89 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 02:09:01,387 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:09:01,388 INFO L93 Difference]: Finished difference Result 135 states and 136 transitions. [2023-11-29 02:09:01,388 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 46 states. [2023-11-29 02:09:01,388 INFO L78 Accepts]: Start accepts. Automaton has has 89 states, 88 states have (on average 2.9204545454545454) internal successors, (257), 89 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 127 [2023-11-29 02:09:01,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:09:01,389 INFO L225 Difference]: With dead ends: 135 [2023-11-29 02:09:01,389 INFO L226 Difference]: Without dead ends: 135 [2023-11-29 02:09:01,390 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 318 GetRequests, 187 SyntacticMatches, 21 SemanticMatches, 110 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5459 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=1415, Invalid=11017, Unknown=0, NotChecked=0, Total=12432 [2023-11-29 02:09:01,390 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 192 mSDsluCounter, 662 mSDsCounter, 0 mSdLazyCounter, 3160 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 192 SdHoareTripleChecker+Valid, 687 SdHoareTripleChecker+Invalid, 3161 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 3160 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:09:01,390 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [192 Valid, 687 Invalid, 3161 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 3160 Invalid, 0 Unknown, 0 Unchecked, 1.3s Time] [2023-11-29 02:09:01,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2023-11-29 02:09:01,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 132. [2023-11-29 02:09:01,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 132 states, 131 states have (on average 1.015267175572519) internal successors, (133), 131 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 02:09:01,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 133 transitions. [2023-11-29 02:09:01,393 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 133 transitions. Word has length 127 [2023-11-29 02:09:01,394 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:09:01,394 INFO L495 AbstractCegarLoop]: Abstraction has 132 states and 133 transitions. [2023-11-29 02:09:01,394 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 89 states, 88 states have (on average 2.9204545454545454) internal successors, (257), 89 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 02:09:01,394 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 133 transitions. [2023-11-29 02:09:01,395 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 132 [2023-11-29 02:09:01,395 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:09:01,395 INFO L195 NwaCegarLoop]: trace histogram [21, 21, 21, 21, 20, 20, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:09:01,400 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Ended with exit code 0 [2023-11-29 02:09:01,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,33 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:01,595 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 02:09:01,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:01,596 INFO L85 PathProgramCache]: Analyzing trace with hash 129513000, now seen corresponding path program 32 times [2023-11-29 02:09:01,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:01,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1578555655] [2023-11-29 02:09:01,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:01,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:01,654 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:03,667 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 61 proven. 1200 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:09:03,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:09:03,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1578555655] [2023-11-29 02:09:03,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1578555655] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:09:03,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1242976001] [2023-11-29 02:09:03,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:09:03,668 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:03,668 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:09:03,668 INFO L229 MonitoredProcess]: Starting monitored process 34 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:09:03,669 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2023-11-29 02:09:03,856 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:09:03,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:09:03,861 INFO L262 TraceCheckSpWp]: Trace formula consists of 732 conjuncts, 122 conjunts are in the unsatisfiable core [2023-11-29 02:09:03,865 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:09:04,653 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 02:09:07,802 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:09:07,802 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 32 treesize of output 29 [2023-11-29 02:09:08,098 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 361 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:09:08,098 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:09:11,096 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 02:09:11,100 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 02:09:11,105 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 02:09:11,866 INFO L134 CoverageAnalysis]: Checked inductivity of 1261 backedges. 361 proven. 900 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:09:11,866 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1242976001] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:09:11,866 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:09:11,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 118 [2023-11-29 02:09:11,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2073186230] [2023-11-29 02:09:11,867 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:09:11,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2023-11-29 02:09:11,868 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:09:11,869 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2023-11-29 02:09:11,869 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=966, Invalid=12840, Unknown=0, NotChecked=0, Total=13806 [2023-11-29 02:09:11,869 INFO L87 Difference]: Start difference. First operand 132 states and 133 transitions. Second operand has 118 states, 118 states have (on average 2.9322033898305087) internal successors, (346), 118 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:21,527 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.94s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:09:22,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:09:22,454 INFO L93 Difference]: Finished difference Result 226 states and 227 transitions. [2023-11-29 02:09:22,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 76 states. [2023-11-29 02:09:22,454 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 118 states have (on average 2.9322033898305087) internal successors, (346), 118 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 131 [2023-11-29 02:09:22,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:09:22,455 INFO L225 Difference]: With dead ends: 226 [2023-11-29 02:09:22,455 INFO L226 Difference]: Without dead ends: 142 [2023-11-29 02:09:22,457 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 359 GetRequests, 170 SyntacticMatches, 21 SemanticMatches, 168 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5973 ImplicationChecksByTransitivity, 12.0s TimeCoverageRelationStatistics Valid=1985, Invalid=26745, Unknown=0, NotChecked=0, Total=28730 [2023-11-29 02:09:22,457 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 201 mSDsluCounter, 1166 mSDsCounter, 0 mSdLazyCounter, 6063 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 5.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 201 SdHoareTripleChecker+Valid, 1191 SdHoareTripleChecker+Invalid, 6070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 6063 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:09:22,457 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [201 Valid, 1191 Invalid, 6070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 6063 Invalid, 0 Unknown, 0 Unchecked, 5.8s Time] [2023-11-29 02:09:22,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2023-11-29 02:09:22,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 138. [2023-11-29 02:09:22,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 138 states, 137 states have (on average 1.0145985401459854) internal successors, (139), 137 states have internal predecessors, (139), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:22,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 139 transitions. [2023-11-29 02:09:22,461 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 139 transitions. Word has length 131 [2023-11-29 02:09:22,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:09:22,461 INFO L495 AbstractCegarLoop]: Abstraction has 138 states and 139 transitions. [2023-11-29 02:09:22,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 118 states have (on average 2.9322033898305087) internal successors, (346), 118 states have internal predecessors, (346), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:22,461 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 139 transitions. [2023-11-29 02:09:22,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 138 [2023-11-29 02:09:22,462 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:09:22,462 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 21, 21, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:09:22,468 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Ended with exit code 0 [2023-11-29 02:09:22,663 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2023-11-29 02:09:22,663 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 02:09:22,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:22,663 INFO L85 PathProgramCache]: Analyzing trace with hash -1500923723, now seen corresponding path program 33 times [2023-11-29 02:09:22,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:22,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118445293] [2023-11-29 02:09:22,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:22,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:22,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:24,936 INFO L134 CoverageAnalysis]: Checked inductivity of 1387 backedges. 64 proven. 1323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:09:24,936 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:09:24,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118445293] [2023-11-29 02:09:24,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2118445293] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:09:24,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [487780197] [2023-11-29 02:09:24,936 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:09:24,936 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:24,936 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:09:24,937 INFO L229 MonitoredProcess]: Starting monitored process 35 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:09:24,938 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2023-11-29 02:09:26,243 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 23 check-sat command(s) [2023-11-29 02:09:26,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:09:26,250 INFO L262 TraceCheckSpWp]: Trace formula consists of 765 conjuncts, 145 conjunts are in the unsatisfiable core [2023-11-29 02:09:26,253 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:09:27,237 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 02:09:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 1387 backedges. 64 proven. 1323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:09:27,403 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:09:27,502 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 02:09:27,504 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 02:09:27,659 INFO L134 CoverageAnalysis]: Checked inductivity of 1387 backedges. 64 proven. 1323 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:09:27,659 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [487780197] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:09:27,659 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:09:27,659 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [49, 49, 49] total 76 [2023-11-29 02:09:27,659 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1729926455] [2023-11-29 02:09:27,659 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:09:27,660 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 76 states [2023-11-29 02:09:27,660 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:09:27,660 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 76 interpolants. [2023-11-29 02:09:27,661 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=188, Invalid=5512, Unknown=0, NotChecked=0, Total=5700 [2023-11-29 02:09:27,661 INFO L87 Difference]: Start difference. First operand 138 states and 139 transitions. Second operand has 76 states, 76 states have (on average 2.5) internal successors, (190), 76 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:31,539 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:09:31,539 INFO L93 Difference]: Finished difference Result 229 states and 230 transitions. [2023-11-29 02:09:31,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 71 states. [2023-11-29 02:09:31,540 INFO L78 Accepts]: Start accepts. Automaton has has 76 states, 76 states have (on average 2.5) internal successors, (190), 76 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 137 [2023-11-29 02:09:31,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:09:31,541 INFO L225 Difference]: With dead ends: 229 [2023-11-29 02:09:31,541 INFO L226 Difference]: Without dead ends: 141 [2023-11-29 02:09:31,542 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 366 GetRequests, 247 SyntacticMatches, 0 SemanticMatches, 119 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1429 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=470, Invalid=14050, Unknown=0, NotChecked=0, Total=14520 [2023-11-29 02:09:31,542 INFO L413 NwaCegarLoop]: 25 mSDtfsCounter, 265 mSDsluCounter, 1316 mSDsCounter, 0 mSdLazyCounter, 6501 mSolverCounterSat, 21 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 265 SdHoareTripleChecker+Valid, 1341 SdHoareTripleChecker+Invalid, 6522 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 21 IncrementalHoareTripleChecker+Valid, 6501 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:09:31,542 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [265 Valid, 1341 Invalid, 6522 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [21 Valid, 6501 Invalid, 0 Unknown, 0 Unchecked, 2.3s Time] [2023-11-29 02:09:31,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2023-11-29 02:09:31,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 140. [2023-11-29 02:09:31,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 140 states, 139 states have (on average 1.014388489208633) internal successors, (141), 139 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:31,545 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 141 transitions. [2023-11-29 02:09:31,545 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 141 transitions. Word has length 137 [2023-11-29 02:09:31,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:09:31,545 INFO L495 AbstractCegarLoop]: Abstraction has 140 states and 141 transitions. [2023-11-29 02:09:31,545 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 76 states, 76 states have (on average 2.5) internal successors, (190), 76 states have internal predecessors, (190), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:31,545 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 141 transitions. [2023-11-29 02:09:31,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 140 [2023-11-29 02:09:31,546 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:09:31,546 INFO L195 NwaCegarLoop]: trace histogram [22, 22, 22, 22, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:09:31,553 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Ended with exit code 0 [2023-11-29 02:09:31,746 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2023-11-29 02:09:31,747 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 02:09:31,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:31,747 INFO L85 PathProgramCache]: Analyzing trace with hash 403019279, now seen corresponding path program 34 times [2023-11-29 02:09:31,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:31,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509175574] [2023-11-29 02:09:31,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:31,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:31,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:34,223 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 400 proven. 1030 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:09:34,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:09:34,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509175574] [2023-11-29 02:09:34,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509175574] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:09:34,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1077173454] [2023-11-29 02:09:34,223 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:09:34,223 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:34,223 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:09:34,224 INFO L229 MonitoredProcess]: Starting monitored process 36 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:09:34,225 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2023-11-29 02:09:34,640 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:09:34,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:09:34,646 INFO L262 TraceCheckSpWp]: Trace formula consists of 778 conjuncts, 126 conjunts are in the unsatisfiable core [2023-11-29 02:09:34,649 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:09:34,655 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:09:35,873 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 441 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:09:35,874 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:09:39,130 INFO L134 CoverageAnalysis]: Checked inductivity of 1430 backedges. 441 proven. 989 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:09:39,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1077173454] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:09:39,131 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:09:39,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [47, 47, 47] total 117 [2023-11-29 02:09:39,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [269039577] [2023-11-29 02:09:39,131 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:09:39,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 118 states [2023-11-29 02:09:39,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:09:39,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 118 interpolants. [2023-11-29 02:09:39,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1967, Invalid=11839, Unknown=0, NotChecked=0, Total=13806 [2023-11-29 02:09:39,133 INFO L87 Difference]: Start difference. First operand 140 states and 141 transitions. Second operand has 118 states, 117 states have (on average 2.8034188034188032) internal successors, (328), 118 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:42,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:09:42,294 INFO L93 Difference]: Finished difference Result 147 states and 148 transitions. [2023-11-29 02:09:42,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 51 states. [2023-11-29 02:09:42,294 INFO L78 Accepts]: Start accepts. Automaton has has 118 states, 117 states have (on average 2.8034188034188032) internal successors, (328), 118 states have internal predecessors, (328), 0 states have call successors, (0), 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 139 [2023-11-29 02:09:42,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:09:42,295 INFO L225 Difference]: With dead ends: 147 [2023-11-29 02:09:42,295 INFO L226 Difference]: Without dead ends: 147 [2023-11-29 02:09:42,296 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 349 GetRequests, 207 SyntacticMatches, 0 SemanticMatches, 142 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6835 ImplicationChecksByTransitivity, 6.0s TimeCoverageRelationStatistics Valid=3061, Invalid=17531, Unknown=0, NotChecked=0, Total=20592 [2023-11-29 02:09:42,297 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 408 mSDsluCounter, 750 mSDsCounter, 0 mSdLazyCounter, 3842 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 408 SdHoareTripleChecker+Valid, 776 SdHoareTripleChecker+Invalid, 3846 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 3842 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:09:42,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [408 Valid, 776 Invalid, 3846 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 3842 Invalid, 0 Unknown, 0 Unchecked, 1.8s Time] [2023-11-29 02:09:42,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2023-11-29 02:09:42,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 144. [2023-11-29 02:09:42,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 144 states, 143 states have (on average 1.013986013986014) internal successors, (145), 143 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:42,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 145 transitions. [2023-11-29 02:09:42,299 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 145 transitions. Word has length 139 [2023-11-29 02:09:42,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:09:42,299 INFO L495 AbstractCegarLoop]: Abstraction has 144 states and 145 transitions. [2023-11-29 02:09:42,300 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 118 states, 117 states have (on average 2.8034188034188032) internal successors, (328), 118 states have internal predecessors, (328), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:09:42,300 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 145 transitions. [2023-11-29 02:09:42,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 144 [2023-11-29 02:09:42,300 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:09:42,301 INFO L195 NwaCegarLoop]: trace histogram [23, 23, 23, 23, 22, 22, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:09:42,306 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2023-11-29 02:09:42,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,36 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:42,501 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 02:09:42,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:09:42,501 INFO L85 PathProgramCache]: Analyzing trace with hash -769695422, now seen corresponding path program 35 times [2023-11-29 02:09:42,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:09:42,501 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935945048] [2023-11-29 02:09:42,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:09:42,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:09:42,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:09:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1519 backedges. 67 proven. 1452 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:09:45,039 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:09:45,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935945048] [2023-11-29 02:09:45,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1935945048] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:09:45,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022543035] [2023-11-29 02:09:45,040 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:09:45,040 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:09:45,040 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:09:45,041 INFO L229 MonitoredProcess]: Starting monitored process 37 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:09:45,042 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2023-11-29 02:09:45,772 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 24 check-sat command(s) [2023-11-29 02:09:45,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:09:45,779 INFO L262 TraceCheckSpWp]: Trace formula consists of 798 conjuncts, 136 conjunts are in the unsatisfiable core [2023-11-29 02:09:45,782 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:09:45,787 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:09:46,941 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 02:10:01,919 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:10:01,920 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 32 treesize of output 25 [2023-11-29 02:10:02,182 INFO L134 CoverageAnalysis]: Checked inductivity of 1519 backedges. 441 proven. 1076 refuted. 2 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:10:02,183 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:10:05,348 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 02:10:05,352 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 02:10:09,451 INFO L134 CoverageAnalysis]: Checked inductivity of 1519 backedges. 441 proven. 1078 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:10:09,452 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2022543035] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:10:09,452 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:10:09,452 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 50, 50] total 149 [2023-11-29 02:10:09,452 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010530935] [2023-11-29 02:10:09,452 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:09,453 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 149 states [2023-11-29 02:10:09,453 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:09,454 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 149 interpolants. [2023-11-29 02:10:09,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1901, Invalid=20149, Unknown=2, NotChecked=0, Total=22052 [2023-11-29 02:10:09,456 INFO L87 Difference]: Start difference. First operand 144 states and 145 transitions. Second operand has 149 states, 149 states have (on average 2.8523489932885906) internal successors, (425), 149 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:21,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:10:21,464 INFO L93 Difference]: Finished difference Result 246 states and 247 transitions. [2023-11-29 02:10:21,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 81 states. [2023-11-29 02:10:21,464 INFO L78 Accepts]: Start accepts. Automaton has has 149 states, 149 states have (on average 2.8523489932885906) internal successors, (425), 149 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 143 [2023-11-29 02:10:21,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:10:21,465 INFO L225 Difference]: With dead ends: 246 [2023-11-29 02:10:21,465 INFO L226 Difference]: Without dead ends: 154 [2023-11-29 02:10:21,467 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 390 GetRequests, 188 SyntacticMatches, 0 SemanticMatches, 202 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7276 ImplicationChecksByTransitivity, 30.9s TimeCoverageRelationStatistics Valid=3188, Invalid=38222, Unknown=2, NotChecked=0, Total=41412 [2023-11-29 02:10:21,468 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 313 mSDsluCounter, 1315 mSDsCounter, 0 mSdLazyCounter, 7074 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 313 SdHoareTripleChecker+Valid, 1342 SdHoareTripleChecker+Invalid, 7075 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 7074 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:10:21,468 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [313 Valid, 1342 Invalid, 7075 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 7074 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-29 02:10:21,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2023-11-29 02:10:21,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 150. [2023-11-29 02:10:21,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 149 states have (on average 1.0134228187919463) internal successors, (151), 149 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 02:10:21,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 151 transitions. [2023-11-29 02:10:21,470 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 151 transitions. Word has length 143 [2023-11-29 02:10:21,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:10:21,470 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 151 transitions. [2023-11-29 02:10:21,470 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 149 states, 149 states have (on average 2.8523489932885906) internal successors, (425), 149 states have internal predecessors, (425), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:21,471 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 151 transitions. [2023-11-29 02:10:21,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 150 [2023-11-29 02:10:21,471 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:10:21,471 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 23, 23, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:10:21,478 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2023-11-29 02:10:21,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,37 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:21,672 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 02:10:21,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:21,672 INFO L85 PathProgramCache]: Analyzing trace with hash -509816881, now seen corresponding path program 36 times [2023-11-29 02:10:21,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:21,672 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252033334] [2023-11-29 02:10:21,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:21,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:21,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:24,267 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 70 proven. 1587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:10:24,268 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:24,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252033334] [2023-11-29 02:10:24,268 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252033334] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:10:24,268 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1621398818] [2023-11-29 02:10:24,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:10:24,268 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:24,268 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:24,269 INFO L229 MonitoredProcess]: Starting monitored process 38 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:24,269 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2023-11-29 02:10:26,853 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 25 check-sat command(s) [2023-11-29 02:10:26,853 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:10:26,862 INFO L262 TraceCheckSpWp]: Trace formula consists of 831 conjuncts, 157 conjunts are in the unsatisfiable core [2023-11-29 02:10:26,866 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:28,010 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 02:10:28,194 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 70 proven. 1587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:10:28,194 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:10:28,315 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 02:10:28,317 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 02:10:28,505 INFO L134 CoverageAnalysis]: Checked inductivity of 1657 backedges. 70 proven. 1587 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:10:28,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1621398818] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:10:28,505 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:10:28,506 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [53, 53, 53] total 82 [2023-11-29 02:10:28,506 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2061420748] [2023-11-29 02:10:28,506 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:28,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 82 states [2023-11-29 02:10:28,507 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:28,507 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 82 interpolants. [2023-11-29 02:10:28,507 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=202, Invalid=6440, Unknown=0, NotChecked=0, Total=6642 [2023-11-29 02:10:28,508 INFO L87 Difference]: Start difference. First operand 150 states and 151 transitions. Second operand has 82 states, 82 states have (on average 2.5121951219512195) internal successors, (206), 82 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:33,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:10:33,051 INFO L93 Difference]: Finished difference Result 249 states and 250 transitions. [2023-11-29 02:10:33,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 77 states. [2023-11-29 02:10:33,051 INFO L78 Accepts]: Start accepts. Automaton has has 82 states, 82 states have (on average 2.5121951219512195) internal successors, (206), 82 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 149 [2023-11-29 02:10:33,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:10:33,052 INFO L225 Difference]: With dead ends: 249 [2023-11-29 02:10:33,052 INFO L226 Difference]: Without dead ends: 153 [2023-11-29 02:10:33,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 398 GetRequests, 269 SyntacticMatches, 0 SemanticMatches, 129 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1678 ImplicationChecksByTransitivity, 4.2s TimeCoverageRelationStatistics Valid=508, Invalid=16522, Unknown=0, NotChecked=0, Total=17030 [2023-11-29 02:10:33,053 INFO L413 NwaCegarLoop]: 27 mSDtfsCounter, 195 mSDsluCounter, 1507 mSDsCounter, 0 mSdLazyCounter, 7478 mSolverCounterSat, 23 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 195 SdHoareTripleChecker+Valid, 1534 SdHoareTripleChecker+Invalid, 7501 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 23 IncrementalHoareTripleChecker+Valid, 7478 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:10:33,053 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [195 Valid, 1534 Invalid, 7501 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [23 Valid, 7478 Invalid, 0 Unknown, 0 Unchecked, 2.6s Time] [2023-11-29 02:10:33,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2023-11-29 02:10:33,055 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 152. [2023-11-29 02:10:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 151 states have (on average 1.0132450331125828) internal successors, (153), 151 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:33,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 153 transitions. [2023-11-29 02:10:33,056 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 153 transitions. Word has length 149 [2023-11-29 02:10:33,056 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:10:33,056 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 153 transitions. [2023-11-29 02:10:33,056 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 82 states, 82 states have (on average 2.5121951219512195) internal successors, (206), 82 states have internal predecessors, (206), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:33,056 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 153 transitions. [2023-11-29 02:10:33,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 152 [2023-11-29 02:10:33,057 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:10:33,057 INFO L195 NwaCegarLoop]: trace histogram [24, 24, 24, 24, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:10:33,065 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2023-11-29 02:10:33,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2023-11-29 02:10:33,258 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 02:10:33,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:33,258 INFO L85 PathProgramCache]: Analyzing trace with hash -381323735, now seen corresponding path program 37 times [2023-11-29 02:10:33,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:33,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994653699] [2023-11-29 02:10:33,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:33,259 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:33,304 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:36,041 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 484 proven. 1220 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:10:36,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:36,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994653699] [2023-11-29 02:10:36,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1994653699] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:10:36,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174998405] [2023-11-29 02:10:36,041 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:10:36,041 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:36,042 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:36,042 INFO L229 MonitoredProcess]: Starting monitored process 39 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:36,043 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2023-11-29 02:10:36,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:36,265 INFO L262 TraceCheckSpWp]: Trace formula consists of 844 conjuncts, 132 conjunts are in the unsatisfiable core [2023-11-29 02:10:36,268 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 529 proven. 1175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:10:37,495 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:10:39,069 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 02:10:40,030 INFO L134 CoverageAnalysis]: Checked inductivity of 1704 backedges. 529 proven. 1175 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:10:40,031 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1174998405] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:10:40,031 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:10:40,031 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [51, 52, 52] total 104 [2023-11-29 02:10:40,031 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898037237] [2023-11-29 02:10:40,031 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:40,032 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 105 states [2023-11-29 02:10:40,032 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:40,033 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 105 interpolants. [2023-11-29 02:10:40,033 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1395, Invalid=9525, Unknown=0, NotChecked=0, Total=10920 [2023-11-29 02:10:40,034 INFO L87 Difference]: Start difference. First operand 152 states and 153 transitions. Second operand has 105 states, 104 states have (on average 2.9326923076923075) internal successors, (305), 105 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:43,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:10:43,373 INFO L93 Difference]: Finished difference Result 159 states and 160 transitions. [2023-11-29 02:10:43,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 54 states. [2023-11-29 02:10:43,373 INFO L78 Accepts]: Start accepts. Automaton has has 105 states, 104 states have (on average 2.9326923076923075) internal successors, (305), 105 states have internal predecessors, (305), 0 states have call successors, (0), 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 151 [2023-11-29 02:10:43,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:10:43,374 INFO L225 Difference]: With dead ends: 159 [2023-11-29 02:10:43,374 INFO L226 Difference]: Without dead ends: 159 [2023-11-29 02:10:43,375 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 378 GetRequests, 223 SyntacticMatches, 25 SemanticMatches, 130 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 7753 ImplicationChecksByTransitivity, 5.5s TimeCoverageRelationStatistics Valid=1929, Invalid=15363, Unknown=0, NotChecked=0, Total=17292 [2023-11-29 02:10:43,375 INFO L413 NwaCegarLoop]: 28 mSDtfsCounter, 229 mSDsluCounter, 1034 mSDsCounter, 0 mSdLazyCounter, 4959 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 229 SdHoareTripleChecker+Valid, 1062 SdHoareTripleChecker+Invalid, 4960 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 4959 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:10:43,376 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [229 Valid, 1062 Invalid, 4960 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 4959 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 02:10:43,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2023-11-29 02:10:43,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 156. [2023-11-29 02:10:43,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 156 states, 155 states have (on average 1.0129032258064516) internal successors, (157), 155 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:43,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 157 transitions. [2023-11-29 02:10:43,378 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 157 transitions. Word has length 151 [2023-11-29 02:10:43,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:10:43,378 INFO L495 AbstractCegarLoop]: Abstraction has 156 states and 157 transitions. [2023-11-29 02:10:43,378 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 105 states, 104 states have (on average 2.9326923076923075) internal successors, (305), 105 states have internal predecessors, (305), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:10:43,378 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 157 transitions. [2023-11-29 02:10:43,385 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 156 [2023-11-29 02:10:43,385 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:10:43,386 INFO L195 NwaCegarLoop]: trace histogram [25, 25, 25, 25, 24, 24, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:10:43,392 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Ended with exit code 0 [2023-11-29 02:10:43,586 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,39 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:43,586 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 02:10:43,586 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:10:43,587 INFO L85 PathProgramCache]: Analyzing trace with hash 1105044572, now seen corresponding path program 38 times [2023-11-29 02:10:43,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:10:43,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617951750] [2023-11-29 02:10:43,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:10:43,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:10:43,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:10:46,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1801 backedges. 73 proven. 1728 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:10:46,379 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:10:46,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617951750] [2023-11-29 02:10:46,379 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617951750] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:10:46,379 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1536221075] [2023-11-29 02:10:46,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:10:46,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:10:46,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:10:46,381 INFO L229 MonitoredProcess]: Starting monitored process 40 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:10:46,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2023-11-29 02:10:46,634 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:10:46,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:10:46,639 INFO L262 TraceCheckSpWp]: Trace formula consists of 864 conjuncts, 142 conjunts are in the unsatisfiable core [2023-11-29 02:10:46,642 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:10:47,789 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 02:10:52,081 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:10:52,082 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 32 treesize of output 29 [2023-11-29 02:10:52,413 INFO L134 CoverageAnalysis]: Checked inductivity of 1801 backedges. 529 proven. 1272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:10:52,413 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:10:56,340 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 02:10:56,343 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 02:10:56,348 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 02:10:57,520 INFO L134 CoverageAnalysis]: Checked inductivity of 1801 backedges. 529 proven. 1272 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:10:57,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1536221075] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:10:57,520 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:10:57,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 138 [2023-11-29 02:10:57,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [864787974] [2023-11-29 02:10:57,521 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:10:57,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2023-11-29 02:10:57,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:10:57,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2023-11-29 02:10:57,524 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1292, Invalid=17614, Unknown=0, NotChecked=0, Total=18906 [2023-11-29 02:10:57,524 INFO L87 Difference]: Start difference. First operand 156 states and 157 transitions. Second operand has 138 states, 138 states have (on average 2.971014492753623) internal successors, (410), 138 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:04,736 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.61s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:11:06,436 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.33s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:11:20,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:11:20,656 INFO L93 Difference]: Finished difference Result 266 states and 267 transitions. [2023-11-29 02:11:20,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 88 states. [2023-11-29 02:11:20,657 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 138 states have (on average 2.971014492753623) internal successors, (410), 138 states have internal predecessors, (410), 0 states have call successors, (0), 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 155 [2023-11-29 02:11:20,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:11:20,657 INFO L225 Difference]: With dead ends: 266 [2023-11-29 02:11:20,657 INFO L226 Difference]: Without dead ends: 166 [2023-11-29 02:11:20,659 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 423 GetRequests, 202 SyntacticMatches, 25 SemanticMatches, 196 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8201 ImplicationChecksByTransitivity, 24.9s TimeCoverageRelationStatistics Valid=2590, Invalid=36415, Unknown=1, NotChecked=0, Total=39006 [2023-11-29 02:11:20,659 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 336 mSDsluCounter, 1594 mSDsCounter, 0 mSdLazyCounter, 8463 mSolverCounterSat, 28 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 336 SdHoareTripleChecker+Valid, 1623 SdHoareTripleChecker+Invalid, 8491 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 28 IncrementalHoareTripleChecker+Valid, 8463 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:11:20,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [336 Valid, 1623 Invalid, 8491 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [28 Valid, 8463 Invalid, 0 Unknown, 0 Unchecked, 8.4s Time] [2023-11-29 02:11:20,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2023-11-29 02:11:20,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 162. [2023-11-29 02:11:20,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 162 states, 161 states have (on average 1.0124223602484472) internal successors, (163), 161 states have internal predecessors, (163), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:20,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 163 transitions. [2023-11-29 02:11:20,662 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 163 transitions. Word has length 155 [2023-11-29 02:11:20,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:11:20,662 INFO L495 AbstractCegarLoop]: Abstraction has 162 states and 163 transitions. [2023-11-29 02:11:20,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 138 states have (on average 2.971014492753623) internal successors, (410), 138 states have internal predecessors, (410), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:20,662 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 163 transitions. [2023-11-29 02:11:20,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 162 [2023-11-29 02:11:20,663 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:11:20,663 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 25, 25, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:11:20,670 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Ended with exit code 0 [2023-11-29 02:11:20,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,40 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:11:20,863 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 02:11:20,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:11:20,864 INFO L85 PathProgramCache]: Analyzing trace with hash 1400209129, now seen corresponding path program 39 times [2023-11-29 02:11:20,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:11:20,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275046689] [2023-11-29 02:11:20,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:11:20,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:11:20,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:11:23,845 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 76 proven. 1875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:11:23,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:11:23,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275046689] [2023-11-29 02:11:23,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [275046689] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:11:23,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453086952] [2023-11-29 02:11:23,845 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:11:23,845 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:11:23,845 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:11:23,846 INFO L229 MonitoredProcess]: Starting monitored process 41 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:11:23,847 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2023-11-29 02:11:26,658 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 27 check-sat command(s) [2023-11-29 02:11:26,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:11:26,668 INFO L262 TraceCheckSpWp]: Trace formula consists of 897 conjuncts, 169 conjunts are in the unsatisfiable core [2023-11-29 02:11:26,671 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:11:28,033 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 02:11:28,198 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 76 proven. 1875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:11:28,198 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:11:28,334 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 02:11:28,336 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 02:11:28,529 INFO L134 CoverageAnalysis]: Checked inductivity of 1951 backedges. 76 proven. 1875 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:11:28,529 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1453086952] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:11:28,529 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:11:28,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [57, 57, 57] total 88 [2023-11-29 02:11:28,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [19356574] [2023-11-29 02:11:28,529 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:11:28,530 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 88 states [2023-11-29 02:11:28,530 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:11:28,530 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 88 interpolants. [2023-11-29 02:11:28,531 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=216, Invalid=7440, Unknown=0, NotChecked=0, Total=7656 [2023-11-29 02:11:28,531 INFO L87 Difference]: Start difference. First operand 162 states and 163 transitions. Second operand has 88 states, 88 states have (on average 2.522727272727273) internal successors, (222), 88 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 02:11:33,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:11:33,822 INFO L93 Difference]: Finished difference Result 269 states and 270 transitions. [2023-11-29 02:11:33,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 83 states. [2023-11-29 02:11:33,822 INFO L78 Accepts]: Start accepts. Automaton has has 88 states, 88 states have (on average 2.522727272727273) internal successors, (222), 88 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 161 [2023-11-29 02:11:33,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:11:33,823 INFO L225 Difference]: With dead ends: 269 [2023-11-29 02:11:33,823 INFO L226 Difference]: Without dead ends: 165 [2023-11-29 02:11:33,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 430 GetRequests, 291 SyntacticMatches, 0 SemanticMatches, 139 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1947 ImplicationChecksByTransitivity, 5.0s TimeCoverageRelationStatistics Valid=546, Invalid=19194, Unknown=0, NotChecked=0, Total=19740 [2023-11-29 02:11:33,824 INFO L413 NwaCegarLoop]: 29 mSDtfsCounter, 208 mSDsluCounter, 1764 mSDsCounter, 0 mSdLazyCounter, 8754 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 208 SdHoareTripleChecker+Valid, 1793 SdHoareTripleChecker+Invalid, 8779 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 8754 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:11:33,824 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [208 Valid, 1793 Invalid, 8779 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 8754 Invalid, 0 Unknown, 0 Unchecked, 3.1s Time] [2023-11-29 02:11:33,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2023-11-29 02:11:33,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 164. [2023-11-29 02:11:33,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 164 states, 163 states have (on average 1.0122699386503067) internal successors, (165), 163 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 165 transitions. [2023-11-29 02:11:33,826 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 165 transitions. Word has length 161 [2023-11-29 02:11:33,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:11:33,827 INFO L495 AbstractCegarLoop]: Abstraction has 164 states and 165 transitions. [2023-11-29 02:11:33,827 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 88 states, 88 states have (on average 2.522727272727273) internal successors, (222), 88 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 02:11:33,827 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 165 transitions. [2023-11-29 02:11:33,828 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 164 [2023-11-29 02:11:33,828 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:11:33,828 INFO L195 NwaCegarLoop]: trace histogram [26, 26, 26, 26, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:11:33,835 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Ended with exit code 0 [2023-11-29 02:11:34,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2023-11-29 02:11:34,029 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 02:11:34,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:11:34,029 INFO L85 PathProgramCache]: Analyzing trace with hash -278565309, now seen corresponding path program 40 times [2023-11-29 02:11:34,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:11:34,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1396972291] [2023-11-29 02:11:34,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:11:34,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:11:34,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:11:36,813 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 576 proven. 1426 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:11:36,813 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:11:36,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1396972291] [2023-11-29 02:11:36,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1396972291] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:11:36,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2107562884] [2023-11-29 02:11:36,813 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:11:36,814 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:11:36,814 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:11:36,814 INFO L229 MonitoredProcess]: Starting monitored process 42 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:11:36,815 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2023-11-29 02:11:37,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:11:37,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:11:37,378 INFO L262 TraceCheckSpWp]: Trace formula consists of 910 conjuncts, 146 conjunts are in the unsatisfiable core [2023-11-29 02:11:37,382 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:11:37,385 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:11:38,855 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 625 proven. 1377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:11:38,855 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:11:43,036 INFO L134 CoverageAnalysis]: Checked inductivity of 2002 backedges. 625 proven. 1377 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:11:43,037 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2107562884] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:11:43,037 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:11:43,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [55, 55, 55] total 137 [2023-11-29 02:11:43,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677283040] [2023-11-29 02:11:43,037 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:11:43,038 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 138 states [2023-11-29 02:11:43,038 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:11:43,039 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 138 interpolants. [2023-11-29 02:11:43,040 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2685, Invalid=16221, Unknown=0, NotChecked=0, Total=18906 [2023-11-29 02:11:43,040 INFO L87 Difference]: Start difference. First operand 164 states and 165 transitions. Second operand has 138 states, 137 states have (on average 2.802919708029197) internal successors, (384), 138 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:46,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:11:46,556 INFO L93 Difference]: Finished difference Result 171 states and 172 transitions. [2023-11-29 02:11:46,556 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 59 states. [2023-11-29 02:11:46,557 INFO L78 Accepts]: Start accepts. Automaton has has 138 states, 137 states have (on average 2.802919708029197) internal successors, (384), 138 states have internal predecessors, (384), 0 states have call successors, (0), 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 163 [2023-11-29 02:11:46,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:11:46,558 INFO L225 Difference]: With dead ends: 171 [2023-11-29 02:11:46,558 INFO L226 Difference]: Without dead ends: 171 [2023-11-29 02:11:46,559 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 409 GetRequests, 243 SyntacticMatches, 0 SemanticMatches, 166 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9485 ImplicationChecksByTransitivity, 7.1s TimeCoverageRelationStatistics Valid=4129, Invalid=23927, Unknown=0, NotChecked=0, Total=28056 [2023-11-29 02:11:46,559 INFO L413 NwaCegarLoop]: 30 mSDtfsCounter, 807 mSDsluCounter, 919 mSDsCounter, 0 mSdLazyCounter, 4813 mSolverCounterSat, 7 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.8s Time, 0 mProtectedPredicate, 0 mProtectedAction, 807 SdHoareTripleChecker+Valid, 949 SdHoareTripleChecker+Invalid, 4820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 7 IncrementalHoareTripleChecker+Valid, 4813 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.1s IncrementalHoareTripleChecker+Time [2023-11-29 02:11:46,560 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [807 Valid, 949 Invalid, 4820 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [7 Valid, 4813 Invalid, 0 Unknown, 0 Unchecked, 2.1s Time] [2023-11-29 02:11:46,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2023-11-29 02:11:46,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 168. [2023-11-29 02:11:46,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 168 states, 167 states have (on average 1.0119760479041917) internal successors, (169), 167 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 02:11:46,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 169 transitions. [2023-11-29 02:11:46,563 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 169 transitions. Word has length 163 [2023-11-29 02:11:46,563 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:11:46,563 INFO L495 AbstractCegarLoop]: Abstraction has 168 states and 169 transitions. [2023-11-29 02:11:46,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 138 states, 137 states have (on average 2.802919708029197) internal successors, (384), 138 states have internal predecessors, (384), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:11:46,563 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 169 transitions. [2023-11-29 02:11:46,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 168 [2023-11-29 02:11:46,564 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:11:46,564 INFO L195 NwaCegarLoop]: trace histogram [27, 27, 27, 27, 26, 26, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:11:46,571 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2023-11-29 02:11:46,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable52 [2023-11-29 02:11:46,764 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 02:11:46,764 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:11:46,765 INFO L85 PathProgramCache]: Analyzing trace with hash -927989898, now seen corresponding path program 41 times [2023-11-29 02:11:46,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:11:46,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [722734530] [2023-11-29 02:11:46,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:11:46,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:11:46,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:11:49,907 INFO L134 CoverageAnalysis]: Checked inductivity of 2107 backedges. 79 proven. 2028 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:11:49,908 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:11:49,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [722734530] [2023-11-29 02:11:49,908 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [722734530] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:11:49,908 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1987375899] [2023-11-29 02:11:49,908 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:11:49,908 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:11:49,908 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:11:49,909 INFO L229 MonitoredProcess]: Starting monitored process 43 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:11:49,910 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2023-11-29 02:11:50,790 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 28 check-sat command(s) [2023-11-29 02:11:50,790 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:11:50,798 INFO L262 TraceCheckSpWp]: Trace formula consists of 930 conjuncts, 156 conjunts are in the unsatisfiable core [2023-11-29 02:11:50,802 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:11:50,807 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:11:52,396 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 02:12:11,967 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:12:11,967 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 32 treesize of output 25 [2023-11-29 02:12:12,322 INFO L134 CoverageAnalysis]: Checked inductivity of 2107 backedges. 625 proven. 1478 refuted. 4 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:12:12,322 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:12:16,465 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 02:12:16,469 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 02:12:22,191 INFO L134 CoverageAnalysis]: Checked inductivity of 2107 backedges. 625 proven. 1482 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:12:22,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1987375899] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:12:22,191 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:12:22,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 58, 58] total 173 [2023-11-29 02:12:22,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1759872948] [2023-11-29 02:12:22,192 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:12:22,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 173 states [2023-11-29 02:12:22,192 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:12:22,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 173 interpolants. [2023-11-29 02:12:22,194 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2549, Invalid=27203, Unknown=4, NotChecked=0, Total=29756 [2023-11-29 02:12:22,195 INFO L87 Difference]: Start difference. First operand 168 states and 169 transitions. Second operand has 173 states, 173 states have (on average 2.8728323699421967) internal successors, (497), 173 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:47,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:12:47,573 INFO L93 Difference]: Finished difference Result 286 states and 287 transitions. [2023-11-29 02:12:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 93 states. [2023-11-29 02:12:47,573 INFO L78 Accepts]: Start accepts. Automaton has has 173 states, 173 states have (on average 2.8728323699421967) internal successors, (497), 173 states have internal predecessors, (497), 0 states have call successors, (0), 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 167 [2023-11-29 02:12:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:12:47,574 INFO L225 Difference]: With dead ends: 286 [2023-11-29 02:12:47,574 INFO L226 Difference]: Without dead ends: 178 [2023-11-29 02:12:47,576 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 454 GetRequests, 220 SyntacticMatches, 0 SemanticMatches, 234 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9833 ImplicationChecksByTransitivity, 50.3s TimeCoverageRelationStatistics Valid=4156, Invalid=51300, Unknown=4, NotChecked=0, Total=55460 [2023-11-29 02:12:47,577 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 358 mSDsluCounter, 1737 mSDsCounter, 0 mSdLazyCounter, 9240 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 358 SdHoareTripleChecker+Valid, 1768 SdHoareTripleChecker+Invalid, 9241 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 9240 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.0s IncrementalHoareTripleChecker+Time [2023-11-29 02:12:47,577 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [358 Valid, 1768 Invalid, 9241 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 9240 Invalid, 0 Unknown, 0 Unchecked, 5.0s Time] [2023-11-29 02:12:47,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2023-11-29 02:12:47,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 174. [2023-11-29 02:12:47,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 174 states, 173 states have (on average 1.0115606936416186) internal successors, (175), 173 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:47,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 175 transitions. [2023-11-29 02:12:47,579 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 175 transitions. Word has length 167 [2023-11-29 02:12:47,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:12:47,579 INFO L495 AbstractCegarLoop]: Abstraction has 174 states and 175 transitions. [2023-11-29 02:12:47,579 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 173 states, 173 states have (on average 2.8728323699421967) internal successors, (497), 173 states have internal predecessors, (497), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:12:47,580 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 175 transitions. [2023-11-29 02:12:47,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 174 [2023-11-29 02:12:47,580 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:12:47,580 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 27, 27, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:12:47,588 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Ended with exit code 0 [2023-11-29 02:12:47,780 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2023-11-29 02:12:47,781 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 02:12:47,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:12:47,781 INFO L85 PathProgramCache]: Analyzing trace with hash -2087664125, now seen corresponding path program 42 times [2023-11-29 02:12:47,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:12:47,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [147527165] [2023-11-29 02:12:47,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:12:47,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:12:47,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:12:51,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 82 proven. 2187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:12:51,541 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:12:51,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [147527165] [2023-11-29 02:12:51,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [147527165] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:12:51,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951780822] [2023-11-29 02:12:51,541 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:12:51,541 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:12:51,541 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:12:51,542 INFO L229 MonitoredProcess]: Starting monitored process 44 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:12:51,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2023-11-29 02:12:58,909 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 29 check-sat command(s) [2023-11-29 02:12:58,909 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:12:58,922 INFO L262 TraceCheckSpWp]: Trace formula consists of 963 conjuncts, 181 conjunts are in the unsatisfiable core [2023-11-29 02:12:58,926 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:13:00,478 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 02:13:00,665 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 82 proven. 2187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:13:00,665 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:13:00,808 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 02:13:00,809 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 02:13:01,005 INFO L134 CoverageAnalysis]: Checked inductivity of 2269 backedges. 82 proven. 2187 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:13:01,006 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1951780822] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:13:01,006 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:13:01,006 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [61, 61, 61] total 94 [2023-11-29 02:13:01,006 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2088231951] [2023-11-29 02:13:01,006 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:13:01,007 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 94 states [2023-11-29 02:13:01,007 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:13:01,007 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 94 interpolants. [2023-11-29 02:13:01,008 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=230, Invalid=8512, Unknown=0, NotChecked=0, Total=8742 [2023-11-29 02:13:01,008 INFO L87 Difference]: Start difference. First operand 174 states and 175 transitions. Second operand has 94 states, 94 states have (on average 2.5319148936170213) internal successors, (238), 94 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:07,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:13:07,328 INFO L93 Difference]: Finished difference Result 289 states and 290 transitions. [2023-11-29 02:13:07,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 89 states. [2023-11-29 02:13:07,328 INFO L78 Accepts]: Start accepts. Automaton has has 94 states, 94 states have (on average 2.5319148936170213) internal successors, (238), 94 states have internal predecessors, (238), 0 states have call successors, (0), 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 02:13:07,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:13:07,329 INFO L225 Difference]: With dead ends: 289 [2023-11-29 02:13:07,329 INFO L226 Difference]: Without dead ends: 177 [2023-11-29 02:13:07,330 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 462 GetRequests, 313 SyntacticMatches, 0 SemanticMatches, 149 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2236 ImplicationChecksByTransitivity, 5.7s TimeCoverageRelationStatistics Valid=584, Invalid=22066, Unknown=0, NotChecked=0, Total=22650 [2023-11-29 02:13:07,330 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 337 mSDsluCounter, 2067 mSDsCounter, 0 mSdLazyCounter, 10261 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 337 SdHoareTripleChecker+Valid, 2098 SdHoareTripleChecker+Invalid, 10288 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 10261 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:13:07,330 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [337 Valid, 2098 Invalid, 10288 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 10261 Invalid, 0 Unknown, 0 Unchecked, 3.7s Time] [2023-11-29 02:13:07,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2023-11-29 02:13:07,333 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 176. [2023-11-29 02:13:07,333 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 176 states, 175 states have (on average 1.0114285714285713) internal successors, (177), 175 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 02:13:07,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 177 transitions. [2023-11-29 02:13:07,333 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 177 transitions. Word has length 173 [2023-11-29 02:13:07,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:13:07,333 INFO L495 AbstractCegarLoop]: Abstraction has 176 states and 177 transitions. [2023-11-29 02:13:07,333 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 94 states, 94 states have (on average 2.5319148936170213) internal successors, (238), 94 states have internal predecessors, (238), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:07,333 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 177 transitions. [2023-11-29 02:13:07,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 176 [2023-11-29 02:13:07,334 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:13:07,334 INFO L195 NwaCegarLoop]: trace histogram [28, 28, 28, 28, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:13:07,342 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Ended with exit code 0 [2023-11-29 02:13:07,534 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2023-11-29 02:13:07,534 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 02:13:07,535 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:13:07,535 INFO L85 PathProgramCache]: Analyzing trace with hash -568164771, now seen corresponding path program 43 times [2023-11-29 02:13:07,535 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:13:07,535 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1724488423] [2023-11-29 02:13:07,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:13:07,535 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:13:07,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:11,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 676 proven. 1648 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:13:11,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:13:11,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1724488423] [2023-11-29 02:13:11,297 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1724488423] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:13:11,297 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2075088489] [2023-11-29 02:13:11,297 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:13:11,297 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:13:11,297 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:13:11,298 INFO L229 MonitoredProcess]: Starting monitored process 45 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:13:11,299 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2023-11-29 02:13:11,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:11,551 INFO L262 TraceCheckSpWp]: Trace formula consists of 976 conjuncts, 152 conjunts are in the unsatisfiable core [2023-11-29 02:13:11,554 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:13:13,158 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 729 proven. 1595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:13:13,158 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:13:15,189 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 02:13:16,443 INFO L134 CoverageAnalysis]: Checked inductivity of 2324 backedges. 729 proven. 1595 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:13:16,443 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2075088489] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:13:16,443 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:13:16,443 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [59, 60, 60] total 120 [2023-11-29 02:13:16,443 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846330374] [2023-11-29 02:13:16,444 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:13:16,444 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 121 states [2023-11-29 02:13:16,444 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:13:16,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 121 interpolants. [2023-11-29 02:13:16,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1847, Invalid=12673, Unknown=0, NotChecked=0, Total=14520 [2023-11-29 02:13:16,447 INFO L87 Difference]: Start difference. First operand 176 states and 177 transitions. Second operand has 121 states, 120 states have (on average 2.941666666666667) internal successors, (353), 121 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:20,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:13:20,481 INFO L93 Difference]: Finished difference Result 183 states and 184 transitions. [2023-11-29 02:13:20,481 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 62 states. [2023-11-29 02:13:20,482 INFO L78 Accepts]: Start accepts. Automaton has has 121 states, 120 states have (on average 2.941666666666667) internal successors, (353), 121 states have internal predecessors, (353), 0 states have call successors, (0), 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 02:13:20,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:13:20,483 INFO L225 Difference]: With dead ends: 183 [2023-11-29 02:13:20,483 INFO L226 Difference]: Without dead ends: 183 [2023-11-29 02:13:20,484 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 438 GetRequests, 259 SyntacticMatches, 29 SemanticMatches, 150 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10447 ImplicationChecksByTransitivity, 7.3s TimeCoverageRelationStatistics Valid=2523, Invalid=20429, Unknown=0, NotChecked=0, Total=22952 [2023-11-29 02:13:20,484 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 137 mSDsluCounter, 1014 mSDsCounter, 0 mSdLazyCounter, 5646 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 137 SdHoareTripleChecker+Valid, 1046 SdHoareTripleChecker+Invalid, 5647 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 5646 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:13:20,484 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [137 Valid, 1046 Invalid, 5647 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 5646 Invalid, 0 Unknown, 0 Unchecked, 2.4s Time] [2023-11-29 02:13:20,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2023-11-29 02:13:20,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 180. [2023-11-29 02:13:20,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 180 states, 179 states have (on average 1.011173184357542) internal successors, (181), 179 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 02:13:20,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 180 states to 180 states and 181 transitions. [2023-11-29 02:13:20,486 INFO L78 Accepts]: Start accepts. Automaton has 180 states and 181 transitions. Word has length 175 [2023-11-29 02:13:20,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:13:20,487 INFO L495 AbstractCegarLoop]: Abstraction has 180 states and 181 transitions. [2023-11-29 02:13:20,487 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 121 states, 120 states have (on average 2.941666666666667) internal successors, (353), 121 states have internal predecessors, (353), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:20,487 INFO L276 IsEmpty]: Start isEmpty. Operand 180 states and 181 transitions. [2023-11-29 02:13:20,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 180 [2023-11-29 02:13:20,488 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:13:20,488 INFO L195 NwaCegarLoop]: trace histogram [29, 29, 29, 29, 28, 28, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:13:20,494 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2023-11-29 02:13:20,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,45 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:13:20,688 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 02:13:20,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:13:20,689 INFO L85 PathProgramCache]: Analyzing trace with hash -204246384, now seen corresponding path program 44 times [2023-11-29 02:13:20,689 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:13:20,689 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988073895] [2023-11-29 02:13:20,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:13:20,689 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:13:20,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:13:24,601 INFO L134 CoverageAnalysis]: Checked inductivity of 2437 backedges. 85 proven. 2352 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:13:24,602 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:13:24,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988073895] [2023-11-29 02:13:24,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988073895] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:13:24,602 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2037202115] [2023-11-29 02:13:24,602 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:13:24,602 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:13:24,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:13:24,603 INFO L229 MonitoredProcess]: Starting monitored process 46 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:13:24,604 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2023-11-29 02:13:24,897 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:13:24,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:13:24,904 INFO L262 TraceCheckSpWp]: Trace formula consists of 996 conjuncts, 162 conjunts are in the unsatisfiable core [2023-11-29 02:13:24,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:13:26,457 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 02:13:32,455 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:13:32,455 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 32 treesize of output 29 [2023-11-29 02:13:32,850 INFO L134 CoverageAnalysis]: Checked inductivity of 2437 backedges. 729 proven. 1708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:13:32,850 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:13:38,368 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 02:13:38,373 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 02:13:38,377 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 02:13:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 2437 backedges. 729 proven. 1708 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:13:39,856 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2037202115] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:13:39,856 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:13:39,856 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 158 [2023-11-29 02:13:39,856 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724719666] [2023-11-29 02:13:39,856 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:13:39,857 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2023-11-29 02:13:39,857 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:13:39,859 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2023-11-29 02:13:39,860 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=1666, Invalid=23140, Unknown=0, NotChecked=0, Total=24806 [2023-11-29 02:13:39,860 INFO L87 Difference]: Start difference. First operand 180 states and 181 transitions. Second operand has 158 states, 158 states have (on average 3.0) internal successors, (474), 158 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:47,344 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 02:13:59,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:13:59,141 INFO L93 Difference]: Finished difference Result 306 states and 307 transitions. [2023-11-29 02:13:59,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 100 states. [2023-11-29 02:13:59,142 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 158 states have (on average 3.0) internal successors, (474), 158 states have internal predecessors, (474), 0 states have call successors, (0), 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 179 [2023-11-29 02:13:59,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:13:59,143 INFO L225 Difference]: With dead ends: 306 [2023-11-29 02:13:59,143 INFO L226 Difference]: Without dead ends: 190 [2023-11-29 02:13:59,145 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 487 GetRequests, 234 SyntacticMatches, 29 SemanticMatches, 224 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10781 ImplicationChecksByTransitivity, 23.7s TimeCoverageRelationStatistics Valid=3277, Invalid=47573, Unknown=0, NotChecked=0, Total=50850 [2023-11-29 02:13:59,145 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 378 mSDsluCounter, 1895 mSDsCounter, 0 mSdLazyCounter, 10287 mSolverCounterSat, 25 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 9.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 378 SdHoareTripleChecker+Valid, 1928 SdHoareTripleChecker+Invalid, 10313 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 10287 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 9.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:13:59,145 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [378 Valid, 1928 Invalid, 10313 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 10287 Invalid, 1 Unknown, 0 Unchecked, 9.8s Time] [2023-11-29 02:13:59,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2023-11-29 02:13:59,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 186. [2023-11-29 02:13:59,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 185 states have (on average 1.0108108108108107) internal successors, (187), 185 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 02:13:59,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 187 transitions. [2023-11-29 02:13:59,147 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 187 transitions. Word has length 179 [2023-11-29 02:13:59,147 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:13:59,147 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 187 transitions. [2023-11-29 02:13:59,148 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 158 states have (on average 3.0) internal successors, (474), 158 states have internal predecessors, (474), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:13:59,148 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 187 transitions. [2023-11-29 02:13:59,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 186 [2023-11-29 02:13:59,148 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:13:59,148 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 29, 29, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:13:59,155 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2023-11-29 02:13:59,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2023-11-29 02:13:59,349 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 02:13:59,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:13:59,349 INFO L85 PathProgramCache]: Analyzing trace with hash -185883363, now seen corresponding path program 45 times [2023-11-29 02:13:59,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:13:59,349 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [451989766] [2023-11-29 02:13:59,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:13:59,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:13:59,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:03,380 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 88 proven. 2523 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:14:03,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:14:03,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [451989766] [2023-11-29 02:14:03,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [451989766] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:14:03,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1269237914] [2023-11-29 02:14:03,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:14:03,380 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:14:03,380 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:14:03,381 INFO L229 MonitoredProcess]: Starting monitored process 47 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:14:03,381 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2023-11-29 02:14:09,352 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 31 check-sat command(s) [2023-11-29 02:14:09,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:14:09,365 INFO L262 TraceCheckSpWp]: Trace formula consists of 1029 conjuncts, 193 conjunts are in the unsatisfiable core [2023-11-29 02:14:09,378 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:14:11,065 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 02:14:11,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 88 proven. 2523 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:14:11,279 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:14:11,412 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 02:14:11,413 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 02:14:11,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2611 backedges. 88 proven. 2523 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:14:11,627 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1269237914] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:14:11,627 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:14:11,627 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [65, 65, 65] total 100 [2023-11-29 02:14:11,627 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006805222] [2023-11-29 02:14:11,627 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:14:11,628 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 100 states [2023-11-29 02:14:11,628 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:14:11,628 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 100 interpolants. [2023-11-29 02:14:11,629 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=244, Invalid=9656, Unknown=0, NotChecked=0, Total=9900 [2023-11-29 02:14:11,629 INFO L87 Difference]: Start difference. First operand 186 states and 187 transitions. Second operand has 100 states, 100 states have (on average 2.54) internal successors, (254), 100 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:18,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:14:18,842 INFO L93 Difference]: Finished difference Result 309 states and 310 transitions. [2023-11-29 02:14:18,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 95 states. [2023-11-29 02:14:18,842 INFO L78 Accepts]: Start accepts. Automaton has has 100 states, 100 states have (on average 2.54) internal successors, (254), 100 states have internal predecessors, (254), 0 states have call successors, (0), 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 185 [2023-11-29 02:14:18,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:14:18,843 INFO L225 Difference]: With dead ends: 309 [2023-11-29 02:14:18,844 INFO L226 Difference]: Without dead ends: 189 [2023-11-29 02:14:18,845 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 494 GetRequests, 335 SyntacticMatches, 0 SemanticMatches, 159 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2545 ImplicationChecksByTransitivity, 6.4s TimeCoverageRelationStatistics Valid=622, Invalid=25138, Unknown=0, NotChecked=0, Total=25760 [2023-11-29 02:14:18,845 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 361 mSDsluCounter, 2452 mSDsCounter, 0 mSdLazyCounter, 12131 mSolverCounterSat, 29 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 361 SdHoareTripleChecker+Valid, 2485 SdHoareTripleChecker+Invalid, 12160 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 29 IncrementalHoareTripleChecker+Valid, 12131 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.3s IncrementalHoareTripleChecker+Time [2023-11-29 02:14:18,845 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [361 Valid, 2485 Invalid, 12160 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [29 Valid, 12131 Invalid, 0 Unknown, 0 Unchecked, 4.3s Time] [2023-11-29 02:14:18,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2023-11-29 02:14:18,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 188. [2023-11-29 02:14:18,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 188 states, 187 states have (on average 1.0106951871657754) internal successors, (189), 187 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:18,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 188 states to 188 states and 189 transitions. [2023-11-29 02:14:18,847 INFO L78 Accepts]: Start accepts. Automaton has 188 states and 189 transitions. Word has length 185 [2023-11-29 02:14:18,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:14:18,847 INFO L495 AbstractCegarLoop]: Abstraction has 188 states and 189 transitions. [2023-11-29 02:14:18,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 100 states, 100 states have (on average 2.54) internal successors, (254), 100 states have internal predecessors, (254), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:18,847 INFO L276 IsEmpty]: Start isEmpty. Operand 188 states and 189 transitions. [2023-11-29 02:14:18,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 188 [2023-11-29 02:14:18,848 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:14:18,848 INFO L195 NwaCegarLoop]: trace histogram [30, 30, 30, 30, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:14:18,859 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Forceful destruction successful, exit code 0 [2023-11-29 02:14:19,048 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2023-11-29 02:14:19,049 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 02:14:19,049 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:14:19,049 INFO L85 PathProgramCache]: Analyzing trace with hash 79275639, now seen corresponding path program 46 times [2023-11-29 02:14:19,049 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:14:19,049 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173238872] [2023-11-29 02:14:19,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:14:19,049 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:14:19,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:22,449 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 784 proven. 1886 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:14:22,449 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:14:22,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173238872] [2023-11-29 02:14:22,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [173238872] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:14:22,449 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1265809813] [2023-11-29 02:14:22,449 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:14:22,449 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:14:22,449 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:14:22,450 INFO L229 MonitoredProcess]: Starting monitored process 48 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:14:22,451 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2023-11-29 02:14:23,335 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:14:23,335 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:14:23,343 INFO L262 TraceCheckSpWp]: Trace formula consists of 1042 conjuncts, 166 conjunts are in the unsatisfiable core [2023-11-29 02:14:23,346 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:14:23,349 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:14:25,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 841 proven. 1829 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:14:25,256 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:14:30,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2670 backedges. 841 proven. 1829 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:14:30,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1265809813] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:14:30,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:14:30,657 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [63, 63, 63] total 157 [2023-11-29 02:14:30,657 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1298618285] [2023-11-29 02:14:30,657 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:14:30,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 158 states [2023-11-29 02:14:30,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:14:30,659 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 158 interpolants. [2023-11-29 02:14:30,660 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3515, Invalid=21291, Unknown=0, NotChecked=0, Total=24806 [2023-11-29 02:14:30,660 INFO L87 Difference]: Start difference. First operand 188 states and 189 transitions. Second operand has 158 states, 157 states have (on average 2.8025477707006368) internal successors, (440), 158 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:35,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:14:35,109 INFO L93 Difference]: Finished difference Result 195 states and 196 transitions. [2023-11-29 02:14:35,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 67 states. [2023-11-29 02:14:35,110 INFO L78 Accepts]: Start accepts. Automaton has has 158 states, 157 states have (on average 2.8025477707006368) internal successors, (440), 158 states have internal predecessors, (440), 0 states have call successors, (0), 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 02:14:35,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:14:35,111 INFO L225 Difference]: With dead ends: 195 [2023-11-29 02:14:35,111 INFO L226 Difference]: Without dead ends: 195 [2023-11-29 02:14:35,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 469 GetRequests, 279 SyntacticMatches, 0 SemanticMatches, 190 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12567 ImplicationChecksByTransitivity, 9.0s TimeCoverageRelationStatistics Valid=5357, Invalid=31315, Unknown=0, NotChecked=0, Total=36672 [2023-11-29 02:14:35,112 INFO L413 NwaCegarLoop]: 34 mSDtfsCounter, 1172 mSDsluCounter, 1184 mSDsCounter, 0 mSdLazyCounter, 6198 mSolverCounterSat, 8 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1172 SdHoareTripleChecker+Valid, 1218 SdHoareTripleChecker+Invalid, 6206 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 8 IncrementalHoareTripleChecker+Valid, 6198 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:14:35,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1172 Valid, 1218 Invalid, 6206 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [8 Valid, 6198 Invalid, 0 Unknown, 0 Unchecked, 2.7s Time] [2023-11-29 02:14:35,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2023-11-29 02:14:35,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 192. [2023-11-29 02:14:35,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 191 states have (on average 1.0104712041884816) internal successors, (193), 191 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:35,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 193 transitions. [2023-11-29 02:14:35,115 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 193 transitions. Word has length 187 [2023-11-29 02:14:35,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:14:35,115 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 193 transitions. [2023-11-29 02:14:35,115 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 158 states, 157 states have (on average 2.8025477707006368) internal successors, (440), 158 states have internal predecessors, (440), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:14:35,115 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 193 transitions. [2023-11-29 02:14:35,116 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 192 [2023-11-29 02:14:35,116 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:14:35,116 INFO L195 NwaCegarLoop]: trace histogram [31, 31, 31, 31, 30, 30, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:14:35,122 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Ended with exit code 0 [2023-11-29 02:14:35,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2023-11-29 02:14:35,316 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 02:14:35,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:14:35,316 INFO L85 PathProgramCache]: Analyzing trace with hash 738524586, now seen corresponding path program 47 times [2023-11-29 02:14:35,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:14:35,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439027474] [2023-11-29 02:14:35,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:14:35,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:14:35,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:14:39,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2791 backedges. 91 proven. 2700 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:14:39,349 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:14:39,349 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439027474] [2023-11-29 02:14:39,349 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [439027474] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:14:39,350 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [971419371] [2023-11-29 02:14:39,350 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:14:39,350 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:14:39,350 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:14:39,351 INFO L229 MonitoredProcess]: Starting monitored process 49 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:14:39,351 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2023-11-29 02:14:41,951 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 32 check-sat command(s) [2023-11-29 02:14:41,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:14:41,962 INFO L262 TraceCheckSpWp]: Trace formula consists of 1062 conjuncts, 176 conjunts are in the unsatisfiable core [2023-11-29 02:14:41,967 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:14:41,970 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:14:44,062 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 02:15:00,108 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:15:00,108 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 32 treesize of output 25 [2023-11-29 02:15:00,516 INFO L134 CoverageAnalysis]: Checked inductivity of 2791 backedges. 841 proven. 1947 refuted. 3 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:15:00,516 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:15:06,415 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 02:15:06,418 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 02:15:14,102 INFO L134 CoverageAnalysis]: Checked inductivity of 2791 backedges. 841 proven. 1950 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:15:14,103 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [971419371] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:15:14,103 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:15:14,103 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 66, 66] total 197 [2023-11-29 02:15:14,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2124407972] [2023-11-29 02:15:14,103 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:15:14,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 197 states [2023-11-29 02:15:14,104 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:15:14,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 197 interpolants. [2023-11-29 02:15:14,107 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3293, Invalid=35316, Unknown=3, NotChecked=0, Total=38612 [2023-11-29 02:15:14,108 INFO L87 Difference]: Start difference. First operand 192 states and 193 transitions. Second operand has 197 states, 197 states have (on average 2.8883248730964466) internal successors, (569), 197 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:15:43,778 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 1.73s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:15:44,226 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:15:44,226 INFO L93 Difference]: Finished difference Result 326 states and 327 transitions. [2023-11-29 02:15:44,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 105 states. [2023-11-29 02:15:44,227 INFO L78 Accepts]: Start accepts. Automaton has has 197 states, 197 states have (on average 2.8883248730964466) internal successors, (569), 197 states have internal predecessors, (569), 0 states have call successors, (0), 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 191 [2023-11-29 02:15:44,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:15:44,228 INFO L225 Difference]: With dead ends: 326 [2023-11-29 02:15:44,228 INFO L226 Difference]: Without dead ends: 202 [2023-11-29 02:15:44,230 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 518 GetRequests, 252 SyntacticMatches, 0 SemanticMatches, 266 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12774 ImplicationChecksByTransitivity, 52.2s TimeCoverageRelationStatistics Valid=5252, Invalid=66301, Unknown=3, NotChecked=0, Total=71556 [2023-11-29 02:15:44,231 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 545 mSDsluCounter, 2097 mSDsCounter, 0 mSdLazyCounter, 11334 mSolverCounterSat, 1 mSolverCounterUnsat, 1 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 545 SdHoareTripleChecker+Valid, 2132 SdHoareTripleChecker+Invalid, 11336 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 11334 IncrementalHoareTripleChecker+Invalid, 1 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:15:44,231 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [545 Valid, 2132 Invalid, 11336 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 11334 Invalid, 1 Unknown, 0 Unchecked, 8.4s Time] [2023-11-29 02:15:44,231 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2023-11-29 02:15:44,233 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 198. [2023-11-29 02:15:44,233 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 198 states, 197 states have (on average 1.0101522842639594) internal successors, (199), 197 states have internal predecessors, (199), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:15:44,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 198 states to 198 states and 199 transitions. [2023-11-29 02:15:44,233 INFO L78 Accepts]: Start accepts. Automaton has 198 states and 199 transitions. Word has length 191 [2023-11-29 02:15:44,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:15:44,233 INFO L495 AbstractCegarLoop]: Abstraction has 198 states and 199 transitions. [2023-11-29 02:15:44,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 197 states, 197 states have (on average 2.8883248730964466) internal successors, (569), 197 states have internal predecessors, (569), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:15:44,234 INFO L276 IsEmpty]: Start isEmpty. Operand 198 states and 199 transitions. [2023-11-29 02:15:44,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 198 [2023-11-29 02:15:44,234 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:15:44,234 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 31, 31, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:15:44,243 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2023-11-29 02:15:44,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2023-11-29 02:15:44,435 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 02:15:44,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:15:44,435 INFO L85 PathProgramCache]: Analyzing trace with hash -436003785, now seen corresponding path program 48 times [2023-11-29 02:15:44,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:15:44,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513722087] [2023-11-29 02:15:44,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:15:44,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:15:44,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:15:48,996 INFO L134 CoverageAnalysis]: Checked inductivity of 2977 backedges. 94 proven. 2883 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:15:48,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:15:48,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513722087] [2023-11-29 02:15:48,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [513722087] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:15:48,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [681405100] [2023-11-29 02:15:48,997 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:15:48,997 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:15:48,997 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:15:48,998 INFO L229 MonitoredProcess]: Starting monitored process 50 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:15:48,999 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2023-11-29 02:16:00,984 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 33 check-sat command(s) [2023-11-29 02:16:00,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:16:01,001 INFO L262 TraceCheckSpWp]: Trace formula consists of 1095 conjuncts, 205 conjunts are in the unsatisfiable core [2023-11-29 02:16:01,004 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:16:03,059 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 02:16:03,297 INFO L134 CoverageAnalysis]: Checked inductivity of 2977 backedges. 94 proven. 2883 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:16:03,297 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:16:03,445 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 02:16:03,446 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 02:16:03,656 INFO L134 CoverageAnalysis]: Checked inductivity of 2977 backedges. 94 proven. 2883 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:16:03,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [681405100] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:16:03,656 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:16:03,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [69, 69, 69] total 106 [2023-11-29 02:16:03,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274478256] [2023-11-29 02:16:03,656 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:16:03,657 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 106 states [2023-11-29 02:16:03,657 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:16:03,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 106 interpolants. [2023-11-29 02:16:03,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=258, Invalid=10872, Unknown=0, NotChecked=0, Total=11130 [2023-11-29 02:16:03,659 INFO L87 Difference]: Start difference. First operand 198 states and 199 transitions. Second operand has 106 states, 106 states have (on average 2.547169811320755) internal successors, (270), 106 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 02:16:11,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:16:11,652 INFO L93 Difference]: Finished difference Result 329 states and 330 transitions. [2023-11-29 02:16:11,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 101 states. [2023-11-29 02:16:11,653 INFO L78 Accepts]: Start accepts. Automaton has has 106 states, 106 states have (on average 2.547169811320755) internal successors, (270), 106 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) Word has length 197 [2023-11-29 02:16:11,653 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:16:11,654 INFO L225 Difference]: With dead ends: 329 [2023-11-29 02:16:11,654 INFO L226 Difference]: Without dead ends: 201 [2023-11-29 02:16:11,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 526 GetRequests, 357 SyntacticMatches, 0 SemanticMatches, 169 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2874 ImplicationChecksByTransitivity, 7.5s TimeCoverageRelationStatistics Valid=660, Invalid=28410, Unknown=0, NotChecked=0, Total=29070 [2023-11-29 02:16:11,656 INFO L413 NwaCegarLoop]: 35 mSDtfsCounter, 385 mSDsluCounter, 2613 mSDsCounter, 0 mSdLazyCounter, 12881 mSolverCounterSat, 31 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.9s Time, 0 mProtectedPredicate, 0 mProtectedAction, 385 SdHoareTripleChecker+Valid, 2648 SdHoareTripleChecker+Invalid, 12912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 31 IncrementalHoareTripleChecker+Valid, 12881 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 4.6s IncrementalHoareTripleChecker+Time [2023-11-29 02:16:11,656 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [385 Valid, 2648 Invalid, 12912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [31 Valid, 12881 Invalid, 0 Unknown, 0 Unchecked, 4.6s Time] [2023-11-29 02:16:11,656 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2023-11-29 02:16:11,659 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 200. [2023-11-29 02:16:11,659 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 199 states have (on average 1.0100502512562815) internal successors, (201), 199 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:16:11,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 201 transitions. [2023-11-29 02:16:11,659 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 201 transitions. Word has length 197 [2023-11-29 02:16:11,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:16:11,659 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 201 transitions. [2023-11-29 02:16:11,659 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 106 states, 106 states have (on average 2.547169811320755) internal successors, (270), 106 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 02:16:11,660 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 201 transitions. [2023-11-29 02:16:11,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 200 [2023-11-29 02:16:11,660 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:16:11,660 INFO L195 NwaCegarLoop]: trace histogram [32, 32, 32, 32, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:16:11,673 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Ended with exit code 0 [2023-11-29 02:16:11,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,50 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:11,861 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 02:16:11,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:16:11,861 INFO L85 PathProgramCache]: Analyzing trace with hash 233301649, now seen corresponding path program 49 times [2023-11-29 02:16:11,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:16:11,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610110378] [2023-11-29 02:16:11,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:11,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:16:11,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:15,764 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 900 proven. 2140 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:16:15,764 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:16:15,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610110378] [2023-11-29 02:16:15,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610110378] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:16:15,765 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420430671] [2023-11-29 02:16:15,765 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2023-11-29 02:16:15,765 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:15,765 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:16:15,765 INFO L229 MonitoredProcess]: Starting monitored process 51 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:16:15,766 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2023-11-29 02:16:16,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:16,077 INFO L262 TraceCheckSpWp]: Trace formula consists of 1108 conjuncts, 172 conjunts are in the unsatisfiable core [2023-11-29 02:16:16,081 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:16:18,028 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 961 proven. 2079 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:16:18,028 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:16:20,420 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 02:16:21,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3040 backedges. 961 proven. 2079 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:16:21,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1420430671] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:16:21,903 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:16:21,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [67, 68, 68] total 136 [2023-11-29 02:16:21,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [616242737] [2023-11-29 02:16:21,904 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:16:21,904 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 137 states [2023-11-29 02:16:21,904 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:16:21,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 137 interpolants. [2023-11-29 02:16:21,906 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2363, Invalid=16269, Unknown=0, NotChecked=0, Total=18632 [2023-11-29 02:16:21,906 INFO L87 Difference]: Start difference. First operand 200 states and 201 transitions. Second operand has 137 states, 136 states have (on average 2.948529411764706) internal successors, (401), 137 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:16:26,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:16:26,258 INFO L93 Difference]: Finished difference Result 207 states and 208 transitions. [2023-11-29 02:16:26,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 70 states. [2023-11-29 02:16:26,258 INFO L78 Accepts]: Start accepts. Automaton has has 137 states, 136 states have (on average 2.948529411764706) internal successors, (401), 137 states have internal predecessors, (401), 0 states have call successors, (0), 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 199 [2023-11-29 02:16:26,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:16:26,259 INFO L225 Difference]: With dead ends: 207 [2023-11-29 02:16:26,259 INFO L226 Difference]: Without dead ends: 207 [2023-11-29 02:16:26,260 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 498 GetRequests, 295 SyntacticMatches, 33 SemanticMatches, 170 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13541 ImplicationChecksByTransitivity, 7.7s TimeCoverageRelationStatistics Valid=3197, Invalid=26215, Unknown=0, NotChecked=0, Total=29412 [2023-11-29 02:16:26,261 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 155 mSDsluCounter, 1282 mSDsCounter, 0 mSdLazyCounter, 6609 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 2.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 155 SdHoareTripleChecker+Valid, 1319 SdHoareTripleChecker+Invalid, 6610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 6609 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 2.9s IncrementalHoareTripleChecker+Time [2023-11-29 02:16:26,261 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [155 Valid, 1319 Invalid, 6610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 6609 Invalid, 0 Unknown, 0 Unchecked, 2.9s Time] [2023-11-29 02:16:26,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2023-11-29 02:16:26,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 204. [2023-11-29 02:16:26,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 204 states, 203 states have (on average 1.0098522167487685) internal successors, (205), 203 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:16:26,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 204 states to 204 states and 205 transitions. [2023-11-29 02:16:26,264 INFO L78 Accepts]: Start accepts. Automaton has 204 states and 205 transitions. Word has length 199 [2023-11-29 02:16:26,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:16:26,265 INFO L495 AbstractCegarLoop]: Abstraction has 204 states and 205 transitions. [2023-11-29 02:16:26,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 137 states, 136 states have (on average 2.948529411764706) internal successors, (401), 137 states have internal predecessors, (401), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:16:26,265 INFO L276 IsEmpty]: Start isEmpty. Operand 204 states and 205 transitions. [2023-11-29 02:16:26,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 204 [2023-11-29 02:16:26,266 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:16:26,266 INFO L195 NwaCegarLoop]: trace histogram [33, 33, 33, 33, 32, 32, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:16:26,273 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2023-11-29 02:16:26,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable61 [2023-11-29 02:16:26,466 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 02:16:26,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:16:26,467 INFO L85 PathProgramCache]: Analyzing trace with hash 1971429572, now seen corresponding path program 50 times [2023-11-29 02:16:26,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:16:26,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800403172] [2023-11-29 02:16:26,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:16:26,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:16:26,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:16:30,893 INFO L134 CoverageAnalysis]: Checked inductivity of 3169 backedges. 97 proven. 3072 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:16:30,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:16:30,893 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800403172] [2023-11-29 02:16:30,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1800403172] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:16:30,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61605351] [2023-11-29 02:16:30,894 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2023-11-29 02:16:30,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:16:30,894 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:16:30,894 INFO L229 MonitoredProcess]: Starting monitored process 52 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:16:30,895 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2023-11-29 02:16:31,252 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2023-11-29 02:16:31,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:16:31,260 INFO L262 TraceCheckSpWp]: Trace formula consists of 1128 conjuncts, 182 conjunts are in the unsatisfiable core [2023-11-29 02:16:31,264 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:16:33,234 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 02:16:40,091 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:16:40,092 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 32 treesize of output 29 [2023-11-29 02:16:40,557 INFO L134 CoverageAnalysis]: Checked inductivity of 3169 backedges. 961 proven. 2208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:16:40,558 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:16:46,932 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 02:16:46,936 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 02:16:46,941 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 02:16:48,782 INFO L134 CoverageAnalysis]: Checked inductivity of 3169 backedges. 961 proven. 2208 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:16:48,782 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [61605351] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:16:48,783 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:16:48,783 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 178 [2023-11-29 02:16:48,783 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184170031] [2023-11-29 02:16:48,783 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:16:48,784 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 178 states [2023-11-29 02:16:48,784 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:16:48,786 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2023-11-29 02:16:48,787 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=2088, Invalid=29418, Unknown=0, NotChecked=0, Total=31506 [2023-11-29 02:16:48,787 INFO L87 Difference]: Start difference. First operand 204 states and 205 transitions. Second operand has 178 states, 178 states have (on average 3.0224719101123596) internal successors, (538), 178 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:16:58,513 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 2.87s for a HTC check with result INVALID. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:17:08,114 WARN L539 Checker$ProtectedHtc]: IncrementalHoareTripleChecker took 4.00s for a HTC check with result UNKNOWN. Formula has sorts [Array, Bool, Int], hasArrays=true, hasNonlinArith=false, quantifiers [0] [2023-11-29 02:17:15,632 WARN L539 Checker$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 02:17:19,834 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 02:17:24,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:17:24,593 INFO L93 Difference]: Finished difference Result 346 states and 347 transitions. [2023-11-29 02:17:24,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 112 states. [2023-11-29 02:17:24,594 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 178 states have (on average 3.0224719101123596) internal successors, (538), 178 states have internal predecessors, (538), 0 states have call successors, (0), 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 203 [2023-11-29 02:17:24,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:17:24,594 INFO L225 Difference]: With dead ends: 346 [2023-11-29 02:17:24,594 INFO L226 Difference]: Without dead ends: 214 [2023-11-29 02:17:24,597 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 551 GetRequests, 266 SyntacticMatches, 33 SemanticMatches, 252 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 13713 ImplicationChecksByTransitivity, 27.7s TimeCoverageRelationStatistics Valid=4043, Invalid=60219, Unknown=0, NotChecked=0, Total=64262 [2023-11-29 02:17:24,597 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 305 mSDsluCounter, 2544 mSDsCounter, 0 mSdLazyCounter, 13263 mSolverCounterSat, 14 mSolverCounterUnsat, 3 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 24.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 305 SdHoareTripleChecker+Valid, 2581 SdHoareTripleChecker+Invalid, 13280 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 13263 IncrementalHoareTripleChecker+Invalid, 3 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 24.8s IncrementalHoareTripleChecker+Time [2023-11-29 02:17:24,597 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [305 Valid, 2581 Invalid, 13280 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 13263 Invalid, 3 Unknown, 0 Unchecked, 24.8s Time] [2023-11-29 02:17:24,597 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 214 states. [2023-11-29 02:17:24,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 214 to 210. [2023-11-29 02:17:24,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 210 states, 209 states have (on average 1.0095693779904307) internal successors, (211), 209 states have internal predecessors, (211), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:17:24,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 210 states to 210 states and 211 transitions. [2023-11-29 02:17:24,599 INFO L78 Accepts]: Start accepts. Automaton has 210 states and 211 transitions. Word has length 203 [2023-11-29 02:17:24,599 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:17:24,599 INFO L495 AbstractCegarLoop]: Abstraction has 210 states and 211 transitions. [2023-11-29 02:17:24,600 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 178 states, 178 states have (on average 3.0224719101123596) internal successors, (538), 178 states have internal predecessors, (538), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:17:24,600 INFO L276 IsEmpty]: Start isEmpty. Operand 210 states and 211 transitions. [2023-11-29 02:17:24,600 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 210 [2023-11-29 02:17:24,600 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:17:24,601 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 33, 33, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:17:24,607 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2023-11-29 02:17:24,801 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,52 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:24,801 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 02:17:24,801 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:17:24,801 INFO L85 PathProgramCache]: Analyzing trace with hash 282340177, now seen corresponding path program 51 times [2023-11-29 02:17:24,801 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:17:24,801 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1687394804] [2023-11-29 02:17:24,802 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:24,802 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:17:24,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:29,923 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 100 proven. 3267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:17:29,923 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:17:29,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1687394804] [2023-11-29 02:17:29,923 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1687394804] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:17:29,923 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478922530] [2023-11-29 02:17:29,923 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-29 02:17:29,923 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:29,923 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:17:29,924 INFO L229 MonitoredProcess]: Starting monitored process 53 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:17:29,925 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2023-11-29 02:17:39,230 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 35 check-sat command(s) [2023-11-29 02:17:39,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:17:39,246 INFO L262 TraceCheckSpWp]: Trace formula consists of 1161 conjuncts, 217 conjunts are in the unsatisfiable core [2023-11-29 02:17:39,250 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:17:41,464 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 02:17:41,679 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 100 proven. 3267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:17:41,679 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:17:41,837 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 02:17:41,839 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 02:17:42,086 INFO L134 CoverageAnalysis]: Checked inductivity of 3367 backedges. 100 proven. 3267 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:17:42,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [478922530] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:17:42,086 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:17:42,087 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [73, 73, 73] total 112 [2023-11-29 02:17:42,087 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1323070390] [2023-11-29 02:17:42,087 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:17:42,088 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 112 states [2023-11-29 02:17:42,088 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:17:42,088 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 112 interpolants. [2023-11-29 02:17:42,089 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=272, Invalid=12160, Unknown=0, NotChecked=0, Total=12432 [2023-11-29 02:17:42,089 INFO L87 Difference]: Start difference. First operand 210 states and 211 transitions. Second operand has 112 states, 112 states have (on average 2.5535714285714284) internal successors, (286), 112 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 02:17:51,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:17:51,330 INFO L93 Difference]: Finished difference Result 349 states and 350 transitions. [2023-11-29 02:17:51,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 107 states. [2023-11-29 02:17:51,331 INFO L78 Accepts]: Start accepts. Automaton has has 112 states, 112 states have (on average 2.5535714285714284) internal successors, (286), 112 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) Word has length 209 [2023-11-29 02:17:51,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:17:51,332 INFO L225 Difference]: With dead ends: 349 [2023-11-29 02:17:51,332 INFO L226 Difference]: Without dead ends: 213 [2023-11-29 02:17:51,333 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 558 GetRequests, 379 SyntacticMatches, 0 SemanticMatches, 179 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3223 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=698, Invalid=31882, Unknown=0, NotChecked=0, Total=32580 [2023-11-29 02:17:51,333 INFO L413 NwaCegarLoop]: 37 mSDtfsCounter, 138 mSDsluCounter, 2949 mSDsCounter, 0 mSdLazyCounter, 14610 mSolverCounterSat, 33 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 4.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 138 SdHoareTripleChecker+Valid, 2986 SdHoareTripleChecker+Invalid, 14643 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 33 IncrementalHoareTripleChecker+Valid, 14610 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 5.4s IncrementalHoareTripleChecker+Time [2023-11-29 02:17:51,334 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [138 Valid, 2986 Invalid, 14643 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [33 Valid, 14610 Invalid, 0 Unknown, 0 Unchecked, 5.4s Time] [2023-11-29 02:17:51,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2023-11-29 02:17:51,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 212. [2023-11-29 02:17:51,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 211 states have (on average 1.009478672985782) internal successors, (213), 211 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 02:17:51,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 213 transitions. [2023-11-29 02:17:51,336 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 213 transitions. Word has length 209 [2023-11-29 02:17:51,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:17:51,336 INFO L495 AbstractCegarLoop]: Abstraction has 212 states and 213 transitions. [2023-11-29 02:17:51,336 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 112 states, 112 states have (on average 2.5535714285714284) internal successors, (286), 112 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 02:17:51,337 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 213 transitions. [2023-11-29 02:17:51,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 212 [2023-11-29 02:17:51,337 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:17:51,338 INFO L195 NwaCegarLoop]: trace histogram [34, 34, 34, 34, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:17:51,347 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Ended with exit code 0 [2023-11-29 02:17:51,538 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,53 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:51,538 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 02:17:51,538 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:17:51,539 INFO L85 PathProgramCache]: Analyzing trace with hash -1075167573, now seen corresponding path program 52 times [2023-11-29 02:17:51,539 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:17:51,539 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [864685221] [2023-11-29 02:17:51,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:17:51,539 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:17:51,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:17:55,849 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 1024 proven. 2410 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:17:55,849 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:17:55,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [864685221] [2023-11-29 02:17:55,849 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [864685221] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:17:55,849 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924845042] [2023-11-29 02:17:55,849 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2023-11-29 02:17:55,849 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:17:55,850 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:17:55,850 INFO L229 MonitoredProcess]: Starting monitored process 54 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:17:55,852 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2023-11-29 02:17:56,774 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2023-11-29 02:17:56,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:17:56,783 INFO L262 TraceCheckSpWp]: Trace formula consists of 1174 conjuncts, 186 conjunts are in the unsatisfiable core [2023-11-29 02:17:56,787 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:17:56,791 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:17:59,221 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 1089 proven. 2345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:17:59,221 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:18:05,687 INFO L134 CoverageAnalysis]: Checked inductivity of 3434 backedges. 1089 proven. 2345 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:18:05,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1924845042] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:18:05,687 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:18:05,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [71, 71, 71] total 177 [2023-11-29 02:18:05,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151577130] [2023-11-29 02:18:05,687 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:18:05,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 178 states [2023-11-29 02:18:05,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:18:05,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 178 interpolants. [2023-11-29 02:18:05,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4457, Invalid=27049, Unknown=0, NotChecked=0, Total=31506 [2023-11-29 02:18:05,691 INFO L87 Difference]: Start difference. First operand 212 states and 213 transitions. Second operand has 178 states, 177 states have (on average 2.8022598870056497) internal successors, (496), 178 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:18:11,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:18:11,585 INFO L93 Difference]: Finished difference Result 219 states and 220 transitions. [2023-11-29 02:18:11,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 75 states. [2023-11-29 02:18:11,585 INFO L78 Accepts]: Start accepts. Automaton has has 178 states, 177 states have (on average 2.8022598870056497) internal successors, (496), 178 states have internal predecessors, (496), 0 states have call successors, (0), 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 211 [2023-11-29 02:18:11,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:18:11,586 INFO L225 Difference]: With dead ends: 219 [2023-11-29 02:18:11,586 INFO L226 Difference]: Without dead ends: 219 [2023-11-29 02:18:11,588 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 529 GetRequests, 315 SyntacticMatches, 0 SemanticMatches, 214 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16081 ImplicationChecksByTransitivity, 11.3s TimeCoverageRelationStatistics Valid=6745, Invalid=39695, Unknown=0, NotChecked=0, Total=46440 [2023-11-29 02:18:11,588 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 453 mSDsluCounter, 1581 mSDsCounter, 0 mSdLazyCounter, 8068 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 453 SdHoareTripleChecker+Valid, 1619 SdHoareTripleChecker+Invalid, 8070 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8068 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.5s IncrementalHoareTripleChecker+Time [2023-11-29 02:18:11,588 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [453 Valid, 1619 Invalid, 8070 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8068 Invalid, 0 Unknown, 0 Unchecked, 3.5s Time] [2023-11-29 02:18:11,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2023-11-29 02:18:11,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 216. [2023-11-29 02:18:11,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 216 states, 215 states have (on average 1.0093023255813953) internal successors, (217), 215 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:18:11,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 216 states to 216 states and 217 transitions. [2023-11-29 02:18:11,591 INFO L78 Accepts]: Start accepts. Automaton has 216 states and 217 transitions. Word has length 211 [2023-11-29 02:18:11,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:18:11,591 INFO L495 AbstractCegarLoop]: Abstraction has 216 states and 217 transitions. [2023-11-29 02:18:11,591 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 178 states, 177 states have (on average 2.8022598870056497) internal successors, (496), 178 states have internal predecessors, (496), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:18:11,591 INFO L276 IsEmpty]: Start isEmpty. Operand 216 states and 217 transitions. [2023-11-29 02:18:11,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 216 [2023-11-29 02:18:11,592 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:18:11,592 INFO L195 NwaCegarLoop]: trace histogram [35, 35, 35, 35, 34, 34, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:18:11,599 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Ended with exit code 0 [2023-11-29 02:18:11,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,54 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:18:11,793 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 02:18:11,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:18:11,793 INFO L85 PathProgramCache]: Analyzing trace with hash 805723102, now seen corresponding path program 53 times [2023-11-29 02:18:11,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:18:11,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780807269] [2023-11-29 02:18:11,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:18:11,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:18:11,877 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:18:16,859 INFO L134 CoverageAnalysis]: Checked inductivity of 3571 backedges. 103 proven. 3468 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:18:16,859 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:18:16,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780807269] [2023-11-29 02:18:16,859 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1780807269] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:18:16,859 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1834045761] [2023-11-29 02:18:16,859 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2023-11-29 02:18:16,859 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:18:16,859 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:18:16,860 INFO L229 MonitoredProcess]: Starting monitored process 55 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:18:16,861 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2023-11-29 02:18:19,176 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 36 check-sat command(s) [2023-11-29 02:18:19,176 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-29 02:18:19,187 INFO L262 TraceCheckSpWp]: Trace formula consists of 1194 conjuncts, 196 conjunts are in the unsatisfiable core [2023-11-29 02:18:19,191 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-29 02:18:19,195 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-29 02:18:21,768 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 02:18:27,978 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-29 02:18:27,978 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 32 treesize of output 25 [2023-11-29 02:18:28,425 INFO L134 CoverageAnalysis]: Checked inductivity of 3571 backedges. 1024 proven. 2547 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:18:28,425 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-29 02:18:35,071 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 02:18:35,074 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 02:18:43,970 INFO L134 CoverageAnalysis]: Checked inductivity of 3571 backedges. 1024 proven. 2547 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:18:43,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1834045761] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-29 02:18:43,971 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-29 02:18:43,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [75, 74, 74] total 221 [2023-11-29 02:18:43,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530380588] [2023-11-29 02:18:43,971 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-29 02:18:43,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 221 states [2023-11-29 02:18:43,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-29 02:18:43,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 221 interpolants. [2023-11-29 02:18:43,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=4001, Invalid=44619, Unknown=0, NotChecked=0, Total=48620 [2023-11-29 02:18:43,976 INFO L87 Difference]: Start difference. First operand 216 states and 217 transitions. Second operand has 221 states, 221 states have (on average 2.9004524886877827) internal successors, (641), 221 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:15,240 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-29 02:19:15,240 INFO L93 Difference]: Finished difference Result 369 states and 371 transitions. [2023-11-29 02:19:15,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 118 states. [2023-11-29 02:19:15,241 INFO L78 Accepts]: Start accepts. Automaton has has 221 states, 221 states have (on average 2.9004524886877827) internal successors, (641), 221 states have internal predecessors, (641), 0 states have call successors, (0), 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 02:19:15,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-29 02:19:15,242 INFO L225 Difference]: With dead ends: 369 [2023-11-29 02:19:15,242 INFO L226 Difference]: Without dead ends: 229 [2023-11-29 02:19:15,245 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 583 GetRequests, 284 SyntacticMatches, 0 SemanticMatches, 299 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15994 ImplicationChecksByTransitivity, 46.0s TimeCoverageRelationStatistics Valid=6414, Invalid=83886, Unknown=0, NotChecked=0, Total=90300 [2023-11-29 02:19:15,245 INFO L413 NwaCegarLoop]: 39 mSDtfsCounter, 739 mSDsluCounter, 2744 mSDsCounter, 0 mSdLazyCounter, 14951 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 7.7s Time, 0 mProtectedPredicate, 0 mProtectedAction, 739 SdHoareTripleChecker+Valid, 2783 SdHoareTripleChecker+Invalid, 14954 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 14951 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 8.7s IncrementalHoareTripleChecker+Time [2023-11-29 02:19:15,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [739 Valid, 2783 Invalid, 14954 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 14951 Invalid, 0 Unknown, 0 Unchecked, 8.7s Time] [2023-11-29 02:19:15,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2023-11-29 02:19:15,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 222. [2023-11-29 02:19:15,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 222 states, 221 states have (on average 1.009049773755656) internal successors, (223), 221 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 02:19:15,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 222 states to 222 states and 223 transitions. [2023-11-29 02:19:15,248 INFO L78 Accepts]: Start accepts. Automaton has 222 states and 223 transitions. Word has length 215 [2023-11-29 02:19:15,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-29 02:19:15,248 INFO L495 AbstractCegarLoop]: Abstraction has 222 states and 223 transitions. [2023-11-29 02:19:15,249 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 221 states, 221 states have (on average 2.9004524886877827) internal successors, (641), 221 states have internal predecessors, (641), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-29 02:19:15,249 INFO L276 IsEmpty]: Start isEmpty. Operand 222 states and 223 transitions. [2023-11-29 02:19:15,250 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 222 [2023-11-29 02:19:15,250 INFO L187 NwaCegarLoop]: Found error trace [2023-11-29 02:19:15,250 INFO L195 NwaCegarLoop]: trace histogram [36, 36, 36, 36, 35, 35, 1, 1, 1, 1, 1, 1, 1] [2023-11-29 02:19:15,260 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Ended with exit code 0 [2023-11-29 02:19:15,450 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,55 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:15,450 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 02:19:15,451 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-29 02:19:15,451 INFO L85 PathProgramCache]: Analyzing trace with hash 1792791147, now seen corresponding path program 54 times [2023-11-29 02:19:15,451 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-29 02:19:15,451 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [884722777] [2023-11-29 02:19:15,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-29 02:19:15,451 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-29 02:19:15,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-29 02:19:21,023 INFO L134 CoverageAnalysis]: Checked inductivity of 3781 backedges. 106 proven. 3675 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-29 02:19:21,023 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-29 02:19:21,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [884722777] [2023-11-29 02:19:21,023 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [884722777] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-29 02:19:21,023 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986216497] [2023-11-29 02:19:21,023 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2023-11-29 02:19:21,023 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-29 02:19:21,023 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 [2023-11-29 02:19:21,024 INFO L229 MonitoredProcess]: Starting monitored process 56 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-29 02:19:21,025 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_7478c25e-55a0-4039-80d8-9ec066b8bb09/bin/uautomizer-verify-BQ2R08f2Ya/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process