./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 527bcce2 Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx --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 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:23:54,407 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:23:54,519 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Default.epf [2023-11-21 22:23:54,525 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:23:54,525 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:23:54,552 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:23:54,553 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:23:54,553 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:23:54,554 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:23:54,555 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:23:54,555 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:23:54,556 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:23:54,556 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:23:54,557 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:23:54,558 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:23:54,558 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:23:54,559 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:23:54,559 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:23:54,560 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:23:54,560 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:23:54,560 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:23:54,564 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:23:54,565 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:23:54,565 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:23:54,566 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:23:54,566 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:23:54,567 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:23:54,569 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:23:54,569 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:23:54,570 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:23:54,570 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:23:54,571 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:23:54,572 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:23:54,572 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2023-11-21 22:23:54,572 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-21 22:23:54,573 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:23:54,573 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:23:54,573 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:23:54,573 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:23:54,574 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_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e [2023-11-21 22:23:54,923 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:23:54,954 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:23:54,957 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:23:54,959 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:23:54,959 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:23:54,961 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2023-11-21 22:23:58,042 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-21 22:23:58,370 INFO L384 CDTParser]: Found 1 translation units. [2023-11-21 22:23:58,371 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/sv-benchmarks/c/memsafety-bftpd/bftpd_3.i [2023-11-21 22:23:58,386 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/data/26ed32a96/4fe3c21e3daf49a680f946888e7c0943/FLAGac29a0a71 [2023-11-21 22:23:58,407 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/data/26ed32a96/4fe3c21e3daf49a680f946888e7c0943 [2023-11-21 22:23:58,415 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-21 22:23:58,417 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-21 22:23:58,419 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-21 22:23:58,420 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-21 22:23:58,425 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-21 22:23:58,429 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:23:58" (1/1) ... [2023-11-21 22:23:58,430 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@21005484 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:58, skipping insertion in model container [2023-11-21 22:23:58,430 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.11 10:23:58" (1/1) ... [2023-11-21 22:23:58,499 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-21 22:23:58,954 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:23:58,967 INFO L202 MainTranslator]: Completed pre-run [2023-11-21 22:23:59,038 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-21 22:23:59,094 INFO L206 MainTranslator]: Completed translation [2023-11-21 22:23:59,095 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:59 WrapperNode [2023-11-21 22:23:59,095 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-21 22:23:59,096 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-21 22:23:59,097 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-21 22:23:59,097 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-21 22:23:59,104 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:59" (1/1) ... [2023-11-21 22:23:59,140 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:59" (1/1) ... [2023-11-21 22:23:59,180 INFO L138 Inliner]: procedures = 168, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 95 [2023-11-21 22:23:59,181 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-21 22:23:59,182 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-21 22:23:59,182 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-21 22:23:59,182 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-21 22:23:59,191 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:59" (1/1) ... [2023-11-21 22:23:59,192 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:59" (1/1) ... [2023-11-21 22:23:59,194 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:59" (1/1) ... [2023-11-21 22:23:59,195 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:59" (1/1) ... [2023-11-21 22:23:59,202 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:59" (1/1) ... [2023-11-21 22:23:59,205 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:59" (1/1) ... [2023-11-21 22:23:59,207 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:59" (1/1) ... [2023-11-21 22:23:59,208 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:59" (1/1) ... [2023-11-21 22:23:59,211 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-21 22:23:59,212 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-21 22:23:59,212 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-21 22:23:59,212 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-21 22:23:59,213 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:59" (1/1) ... [2023-11-21 22:23:59,219 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:23:59,244 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:23:59,255 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-21 22:23:59,261 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-21 22:23:59,289 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-21 22:23:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure parse_input [2023-11-21 22:23:59,290 INFO L138 BoogieDeclarations]: Found implementation of procedure parse_input [2023-11-21 22:23:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnHeap [2023-11-21 22:23:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-21 22:23:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure read~$Pointer$ [2023-11-21 22:23:59,290 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-21 22:23:59,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~$Pointer$ [2023-11-21 22:23:59,291 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-21 22:23:59,291 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-21 22:23:59,291 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-21 22:23:59,404 INFO L240 CfgBuilder]: Building ICFG [2023-11-21 22:23:59,406 INFO L266 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-21 22:23:59,647 INFO L281 CfgBuilder]: Performing block encoding [2023-11-21 22:23:59,758 INFO L303 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-21 22:23:59,759 INFO L308 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-21 22:23:59,760 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:23:59 BoogieIcfgContainer [2023-11-21 22:23:59,761 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-21 22:23:59,763 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-21 22:23:59,763 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-21 22:23:59,767 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-21 22:23:59,767 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.11 10:23:58" (1/3) ... [2023-11-21 22:23:59,768 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f9bfa69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:23:59, skipping insertion in model container [2023-11-21 22:23:59,771 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.11 10:23:59" (2/3) ... [2023-11-21 22:23:59,772 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5f9bfa69 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.11 10:23:59, skipping insertion in model container [2023-11-21 22:23:59,772 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:23:59" (3/3) ... [2023-11-21 22:23:59,774 INFO L112 eAbstractionObserver]: Analyzing ICFG bftpd_3.i [2023-11-21 22:23:59,795 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-21 22:23:59,795 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 20 error locations. [2023-11-21 22:23:59,850 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-21 22:23:59,856 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;@1ac5cd66, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-21 22:23:59,857 INFO L358 AbstractCegarLoop]: Starting to check reachability of 20 error locations. [2023-11-21 22:23:59,860 INFO L276 IsEmpty]: Start isEmpty. Operand has 54 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 49 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:23:59,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-21 22:23:59,866 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:23:59,880 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:23:59,881 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:23:59,887 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:23:59,887 INFO L85 PathProgramCache]: Analyzing trace with hash 131378568, now seen corresponding path program 1 times [2023-11-21 22:23:59,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:23:59,900 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1446583243] [2023-11-21 22:23:59,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:23:59,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:00,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:00,308 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:00,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:00,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1446583243] [2023-11-21 22:24:00,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1446583243] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:24:00,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:24:00,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-21 22:24:00,312 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37989912] [2023-11-21 22:24:00,312 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:24:00,317 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:24:00,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:00,348 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:24:00,349 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:24:00,352 INFO L87 Difference]: Start difference. First operand has 54 states, 29 states have (on average 1.8620689655172413) internal successors, (54), 49 states have internal predecessors, (54), 3 states have call successors, (3), 1 states have call predecessors, (3), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Second operand has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:00,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:00,503 INFO L93 Difference]: Finished difference Result 106 states and 123 transitions. [2023-11-21 22:24:00,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:24:00,506 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-21 22:24:00,507 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:00,516 INFO L225 Difference]: With dead ends: 106 [2023-11-21 22:24:00,517 INFO L226 Difference]: Without dead ends: 103 [2023-11-21 22:24:00,518 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-21 22:24:00,522 INFO L413 NwaCegarLoop]: 43 mSDtfsCounter, 122 mSDsluCounter, 39 mSDsCounter, 0 mSdLazyCounter, 54 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 122 SdHoareTripleChecker+Valid, 82 SdHoareTripleChecker+Invalid, 64 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 54 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:00,523 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [122 Valid, 82 Invalid, 64 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 54 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:24:00,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2023-11-21 22:24:00,568 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 76. [2023-11-21 22:24:00,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 49 states have (on average 1.7142857142857142) internal successors, (84), 66 states have internal predecessors, (84), 6 states have call successors, (6), 3 states have call predecessors, (6), 3 states have return successors, (12), 6 states have call predecessors, (12), 6 states have call successors, (12) [2023-11-21 22:24:00,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 102 transitions. [2023-11-21 22:24:00,577 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 102 transitions. Word has length 5 [2023-11-21 22:24:00,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:00,577 INFO L495 AbstractCegarLoop]: Abstraction has 76 states and 102 transitions. [2023-11-21 22:24:00,577 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 2 states have (on average 2.0) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:00,578 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 102 transitions. [2023-11-21 22:24:00,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-21 22:24:00,578 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:00,578 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-21 22:24:00,579 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-21 22:24:00,579 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:00,580 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:00,580 INFO L85 PathProgramCache]: Analyzing trace with hash 131378569, now seen corresponding path program 1 times [2023-11-21 22:24:00,580 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:00,580 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415432555] [2023-11-21 22:24:00,581 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:00,581 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:00,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:00,763 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:00,764 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415432555] [2023-11-21 22:24:00,764 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1415432555] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:24:00,764 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:24:00,765 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:24:00,765 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122190226] [2023-11-21 22:24:00,765 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:24:00,766 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:24:00,767 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:00,767 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:24:00,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:24:00,768 INFO L87 Difference]: Start difference. First operand 76 states and 102 transitions. Second operand has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:00,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:00,977 INFO L93 Difference]: Finished difference Result 198 states and 266 transitions. [2023-11-21 22:24:00,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-21 22:24:00,978 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-21 22:24:00,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:00,986 INFO L225 Difference]: With dead ends: 198 [2023-11-21 22:24:00,986 INFO L226 Difference]: Without dead ends: 198 [2023-11-21 22:24:00,991 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:24:00,993 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 135 mSDsluCounter, 118 mSDsCounter, 0 mSdLazyCounter, 74 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 77 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 74 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:00,994 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 167 Invalid, 77 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 74 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:24:00,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2023-11-21 22:24:01,029 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 147. [2023-11-21 22:24:01,030 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 147 states, 113 states have (on average 1.7079646017699115) internal successors, (193), 130 states have internal predecessors, (193), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2023-11-21 22:24:01,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 229 transitions. [2023-11-21 22:24:01,034 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 229 transitions. Word has length 5 [2023-11-21 22:24:01,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:01,034 INFO L495 AbstractCegarLoop]: Abstraction has 147 states and 229 transitions. [2023-11-21 22:24:01,034 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 1.3333333333333333) internal successors, (4), 3 states have internal predecessors, (4), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:01,035 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 229 transitions. [2023-11-21 22:24:01,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2023-11-21 22:24:01,035 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:01,035 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2023-11-21 22:24:01,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-21 22:24:01,036 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:01,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:01,037 INFO L85 PathProgramCache]: Analyzing trace with hash -222231707, now seen corresponding path program 1 times [2023-11-21 22:24:01,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:01,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [937828770] [2023-11-21 22:24:01,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:01,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:01,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:01,332 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:01,332 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:01,332 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [937828770] [2023-11-21 22:24:01,333 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [937828770] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:24:01,333 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:24:01,333 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:24:01,333 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1376087573] [2023-11-21 22:24:01,334 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:24:01,334 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:24:01,334 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:01,335 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:24:01,335 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:24:01,336 INFO L87 Difference]: Start difference. First operand 147 states and 229 transitions. Second operand has 5 states, 4 states have (on average 1.25) internal successors, (5), 4 states have internal predecessors, (5), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:01,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:01,587 INFO L93 Difference]: Finished difference Result 220 states and 317 transitions. [2023-11-21 22:24:01,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:24:01,588 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2023-11-21 22:24:01,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:01,591 INFO L225 Difference]: With dead ends: 220 [2023-11-21 22:24:01,592 INFO L226 Difference]: Without dead ends: 220 [2023-11-21 22:24:01,592 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 [2023-11-21 22:24:01,601 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 83 mSDsluCounter, 96 mSDsCounter, 0 mSdLazyCounter, 123 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 83 SdHoareTripleChecker+Valid, 141 SdHoareTripleChecker+Invalid, 126 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 123 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:01,603 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [83 Valid, 141 Invalid, 126 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 123 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:24:01,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2023-11-21 22:24:01,629 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 150. [2023-11-21 22:24:01,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 116 states have (on average 1.6896551724137931) internal successors, (196), 133 states have internal predecessors, (196), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2023-11-21 22:24:01,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 232 transitions. [2023-11-21 22:24:01,641 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 232 transitions. Word has length 6 [2023-11-21 22:24:01,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:01,643 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 232 transitions. [2023-11-21 22:24:01,643 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), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:01,644 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 232 transitions. [2023-11-21 22:24:01,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-21 22:24:01,648 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:01,649 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:01,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-21 22:24:01,649 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:01,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:01,650 INFO L85 PathProgramCache]: Analyzing trace with hash 1700751720, now seen corresponding path program 1 times [2023-11-21 22:24:01,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:01,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601617460] [2023-11-21 22:24:01,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:01,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:01,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:02,001 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:02,002 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:02,002 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601617460] [2023-11-21 22:24:02,003 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601617460] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:24:02,003 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:24:02,003 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:24:02,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [982065380] [2023-11-21 22:24:02,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:24:02,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:24:02,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:02,005 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:24:02,005 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:24:02,005 INFO L87 Difference]: Start difference. First operand 150 states and 232 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:02,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:02,157 INFO L93 Difference]: Finished difference Result 200 states and 267 transitions. [2023-11-21 22:24:02,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:24:02,158 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 7 [2023-11-21 22:24:02,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:02,161 INFO L225 Difference]: With dead ends: 200 [2023-11-21 22:24:02,161 INFO L226 Difference]: Without dead ends: 200 [2023-11-21 22:24:02,161 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 [2023-11-21 22:24:02,168 INFO L413 NwaCegarLoop]: 48 mSDtfsCounter, 135 mSDsluCounter, 110 mSDsCounter, 0 mSdLazyCounter, 86 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 135 SdHoareTripleChecker+Valid, 158 SdHoareTripleChecker+Invalid, 86 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 86 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:02,169 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [135 Valid, 158 Invalid, 86 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 86 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:24:02,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-11-21 22:24:02,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 150. [2023-11-21 22:24:02,193 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 150 states, 116 states have (on average 1.6724137931034482) internal successors, (194), 133 states have internal predecessors, (194), 10 states have call successors, (10), 6 states have call predecessors, (10), 6 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2023-11-21 22:24:02,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 230 transitions. [2023-11-21 22:24:02,195 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 230 transitions. Word has length 7 [2023-11-21 22:24:02,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:02,195 INFO L495 AbstractCegarLoop]: Abstraction has 150 states and 230 transitions. [2023-11-21 22:24:02,195 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:02,196 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 230 transitions. [2023-11-21 22:24:02,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2023-11-21 22:24:02,196 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:02,196 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:02,196 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-21 22:24:02,197 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:02,197 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:02,197 INFO L85 PathProgramCache]: Analyzing trace with hash 1183695815, now seen corresponding path program 1 times [2023-11-21 22:24:02,197 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:02,198 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707756135] [2023-11-21 22:24:02,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:02,198 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:02,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:02,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:02,309 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:02,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707756135] [2023-11-21 22:24:02,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707756135] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:24:02,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:24:02,310 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:24:02,310 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [585984376] [2023-11-21 22:24:02,310 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:24:02,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:24:02,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:02,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:24:02,312 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:24:02,312 INFO L87 Difference]: Start difference. First operand 150 states and 230 transitions. Second operand has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:02,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:02,416 INFO L93 Difference]: Finished difference Result 227 states and 313 transitions. [2023-11-21 22:24:02,416 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:24:02,416 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2023-11-21 22:24:02,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:02,418 INFO L225 Difference]: With dead ends: 227 [2023-11-21 22:24:02,419 INFO L226 Difference]: Without dead ends: 227 [2023-11-21 22:24:02,419 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:24:02,420 INFO L413 NwaCegarLoop]: 41 mSDtfsCounter, 110 mSDsluCounter, 101 mSDsCounter, 0 mSdLazyCounter, 83 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 142 SdHoareTripleChecker+Invalid, 87 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 83 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:02,420 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 142 Invalid, 87 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 83 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:24:02,421 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2023-11-21 22:24:02,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 178. [2023-11-21 22:24:02,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 178 states, 142 states have (on average 1.6408450704225352) internal successors, (233), 160 states have internal predecessors, (233), 10 states have call successors, (10), 7 states have call predecessors, (10), 8 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2023-11-21 22:24:02,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 178 states to 178 states and 269 transitions. [2023-11-21 22:24:02,433 INFO L78 Accepts]: Start accepts. Automaton has 178 states and 269 transitions. Word has length 8 [2023-11-21 22:24:02,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:02,433 INFO L495 AbstractCegarLoop]: Abstraction has 178 states and 269 transitions. [2023-11-21 22:24:02,434 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.3333333333333335) internal successors, (7), 3 states have internal predecessors, (7), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:02,434 INFO L276 IsEmpty]: Start isEmpty. Operand 178 states and 269 transitions. [2023-11-21 22:24:02,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-21 22:24:02,434 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:02,434 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:02,435 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-21 22:24:02,435 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:02,435 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:02,436 INFO L85 PathProgramCache]: Analyzing trace with hash -1960135350, now seen corresponding path program 1 times [2023-11-21 22:24:02,436 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:02,436 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1681444387] [2023-11-21 22:24:02,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:02,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:02,536 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:02,537 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:02,537 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1681444387] [2023-11-21 22:24:02,537 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1681444387] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:24:02,537 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:24:02,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:24:02,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851689692] [2023-11-21 22:24:02,538 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:24:02,538 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:24:02,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:02,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:24:02,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:24:02,540 INFO L87 Difference]: Start difference. First operand 178 states and 269 transitions. Second operand has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:02,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:02,643 INFO L93 Difference]: Finished difference Result 226 states and 292 transitions. [2023-11-21 22:24:02,644 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:24:02,644 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-21 22:24:02,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:02,651 INFO L225 Difference]: With dead ends: 226 [2023-11-21 22:24:02,651 INFO L226 Difference]: Without dead ends: 226 [2023-11-21 22:24:02,653 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 [2023-11-21 22:24:02,654 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 179 mSDsluCounter, 122 mSDsCounter, 0 mSdLazyCounter, 72 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 179 SdHoareTripleChecker+Valid, 167 SdHoareTripleChecker+Invalid, 73 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 72 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:02,654 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [179 Valid, 167 Invalid, 73 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 72 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:24:02,655 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 226 states. [2023-11-21 22:24:02,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 226 to 192. [2023-11-21 22:24:02,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 155 states have (on average 1.6387096774193548) internal successors, (254), 174 states have internal predecessors, (254), 10 states have call successors, (10), 7 states have call predecessors, (10), 9 states have return successors, (26), 10 states have call predecessors, (26), 10 states have call successors, (26) [2023-11-21 22:24:02,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 290 transitions. [2023-11-21 22:24:02,672 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 290 transitions. Word has length 9 [2023-11-21 22:24:02,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:02,674 INFO L495 AbstractCegarLoop]: Abstraction has 192 states and 290 transitions. [2023-11-21 22:24:02,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:02,675 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 290 transitions. [2023-11-21 22:24:02,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-21 22:24:02,675 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:02,675 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:02,676 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-21 22:24:02,676 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:02,677 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:02,677 INFO L85 PathProgramCache]: Analyzing trace with hash -519071088, now seen corresponding path program 1 times [2023-11-21 22:24:02,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:02,677 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913966076] [2023-11-21 22:24:02,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:02,677 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:02,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:02,893 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:02,893 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:02,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913966076] [2023-11-21 22:24:02,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1913966076] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:02,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024003190] [2023-11-21 22:24:02,894 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:02,894 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:02,895 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:24:02,900 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:24:02,911 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-21 22:24:02,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:02,999 INFO L262 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:24:03,005 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:24:03,262 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:03,263 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:24:03,392 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:03,393 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1024003190] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:24:03,393 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:24:03,393 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 3, 3] total 11 [2023-11-21 22:24:03,393 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40855529] [2023-11-21 22:24:03,394 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:24:03,395 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 22:24:03,395 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:03,395 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 22:24:03,396 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2023-11-21 22:24:03,396 INFO L87 Difference]: Start difference. First operand 192 states and 290 transitions. Second operand has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:03,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:03,680 INFO L93 Difference]: Finished difference Result 260 states and 349 transitions. [2023-11-21 22:24:03,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-21 22:24:03,681 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-21 22:24:03,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:03,683 INFO L225 Difference]: With dead ends: 260 [2023-11-21 22:24:03,683 INFO L226 Difference]: Without dead ends: 260 [2023-11-21 22:24:03,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=68, Invalid=172, Unknown=0, NotChecked=0, Total=240 [2023-11-21 22:24:03,684 INFO L413 NwaCegarLoop]: 95 mSDtfsCounter, 457 mSDsluCounter, 251 mSDsCounter, 0 mSdLazyCounter, 201 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 457 SdHoareTripleChecker+Valid, 346 SdHoareTripleChecker+Invalid, 213 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 201 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:03,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [457 Valid, 346 Invalid, 213 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 201 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:24:03,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-21 22:24:03,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 197. [2023-11-21 22:24:03,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 159 states have (on average 1.5660377358490567) internal successors, (249), 179 states have internal predecessors, (249), 10 states have call successors, (10), 7 states have call predecessors, (10), 10 states have return successors, (27), 10 states have call predecessors, (27), 10 states have call successors, (27) [2023-11-21 22:24:03,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 286 transitions. [2023-11-21 22:24:03,695 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 286 transitions. Word has length 13 [2023-11-21 22:24:03,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:03,696 INFO L495 AbstractCegarLoop]: Abstraction has 197 states and 286 transitions. [2023-11-21 22:24:03,696 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 11 states have (on average 3.272727272727273) internal successors, (36), 11 states have internal predecessors, (36), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:03,696 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 286 transitions. [2023-11-21 22:24:03,696 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2023-11-21 22:24:03,696 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:03,697 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:03,725 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-21 22:24:03,918 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-21 22:24:03,918 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:03,918 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:03,919 INFO L85 PathProgramCache]: Analyzing trace with hash 1088665406, now seen corresponding path program 1 times [2023-11-21 22:24:03,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:03,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862519460] [2023-11-21 22:24:03,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:03,919 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:03,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:04,081 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:04,081 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:04,081 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862519460] [2023-11-21 22:24:04,081 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1862519460] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:04,082 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870112985] [2023-11-21 22:24:04,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:04,082 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:04,082 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:24:04,083 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:24:04,104 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-21 22:24:04,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:04,159 INFO L262 TraceCheckSpWp]: Trace formula consists of 146 conjuncts, 15 conjunts are in the unsatisfiable core [2023-11-21 22:24:04,160 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:24:04,361 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:04,361 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:24:04,444 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:04,445 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1870112985] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:24:04,445 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:24:04,445 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 12 [2023-11-21 22:24:04,445 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [876393856] [2023-11-21 22:24:04,446 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:24:04,446 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 22:24:04,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:04,447 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 22:24:04,447 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=135, Unknown=0, NotChecked=0, Total=182 [2023-11-21 22:24:04,448 INFO L87 Difference]: Start difference. First operand 197 states and 286 transitions. Second operand has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:04,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:04,816 INFO L93 Difference]: Finished difference Result 281 states and 391 transitions. [2023-11-21 22:24:04,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-21 22:24:04,816 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2023-11-21 22:24:04,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:04,819 INFO L225 Difference]: With dead ends: 281 [2023-11-21 22:24:04,819 INFO L226 Difference]: Without dead ends: 281 [2023-11-21 22:24:04,819 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:24:04,821 INFO L413 NwaCegarLoop]: 61 mSDtfsCounter, 150 mSDsluCounter, 278 mSDsCounter, 0 mSdLazyCounter, 365 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 150 SdHoareTripleChecker+Valid, 339 SdHoareTripleChecker+Invalid, 377 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 365 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:04,821 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [150 Valid, 339 Invalid, 377 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 365 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:24:04,822 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2023-11-21 22:24:04,829 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 207. [2023-11-21 22:24:04,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 207 states, 168 states have (on average 1.5535714285714286) internal successors, (261), 189 states have internal predecessors, (261), 10 states have call successors, (10), 7 states have call predecessors, (10), 11 states have return successors, (29), 10 states have call predecessors, (29), 10 states have call successors, (29) [2023-11-21 22:24:04,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 207 states to 207 states and 300 transitions. [2023-11-21 22:24:04,833 INFO L78 Accepts]: Start accepts. Automaton has 207 states and 300 transitions. Word has length 14 [2023-11-21 22:24:04,834 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:04,834 INFO L495 AbstractCegarLoop]: Abstraction has 207 states and 300 transitions. [2023-11-21 22:24:04,834 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.923076923076923) internal successors, (38), 13 states have internal predecessors, (38), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:04,834 INFO L276 IsEmpty]: Start isEmpty. Operand 207 states and 300 transitions. [2023-11-21 22:24:04,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-21 22:24:04,835 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:04,835 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:04,858 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-21 22:24:05,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable7 [2023-11-21 22:24:05,053 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:05,053 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:05,053 INFO L85 PathProgramCache]: Analyzing trace with hash -611110737, now seen corresponding path program 1 times [2023-11-21 22:24:05,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:05,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702606252] [2023-11-21 22:24:05,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:05,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:05,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:05,308 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:05,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:05,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702606252] [2023-11-21 22:24:05,309 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [702606252] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:05,309 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819402169] [2023-11-21 22:24:05,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:05,309 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:05,309 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:24:05,313 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:24:05,336 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-21 22:24:05,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:05,399 INFO L262 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2023-11-21 22:24:05,403 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:24:05,674 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:05,674 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:24:05,836 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:05,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [819402169] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:24:05,836 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:24:05,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 4, 4] total 13 [2023-11-21 22:24:05,836 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250047997] [2023-11-21 22:24:05,837 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:24:05,837 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 22:24:05,837 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:05,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 22:24:05,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2023-11-21 22:24:05,838 INFO L87 Difference]: Start difference. First operand 207 states and 300 transitions. Second operand has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:06,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:06,714 INFO L93 Difference]: Finished difference Result 441 states and 572 transitions. [2023-11-21 22:24:06,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 22:24:06,714 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2023-11-21 22:24:06,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:06,718 INFO L225 Difference]: With dead ends: 441 [2023-11-21 22:24:06,718 INFO L226 Difference]: Without dead ends: 441 [2023-11-21 22:24:06,718 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=140, Invalid=510, Unknown=0, NotChecked=0, Total=650 [2023-11-21 22:24:06,719 INFO L413 NwaCegarLoop]: 93 mSDtfsCounter, 506 mSDsluCounter, 692 mSDsCounter, 0 mSdLazyCounter, 593 mSolverCounterSat, 25 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 785 SdHoareTripleChecker+Invalid, 618 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 25 IncrementalHoareTripleChecker+Valid, 593 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:06,720 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 785 Invalid, 618 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [25 Valid, 593 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:24:06,721 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 441 states. [2023-11-21 22:24:06,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 441 to 269. [2023-11-21 22:24:06,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 269 states, 226 states have (on average 1.575221238938053) internal successors, (356), 249 states have internal predecessors, (356), 11 states have call successors, (11), 8 states have call predecessors, (11), 14 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2023-11-21 22:24:06,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 269 states to 269 states and 398 transitions. [2023-11-21 22:24:06,734 INFO L78 Accepts]: Start accepts. Automaton has 269 states and 398 transitions. Word has length 15 [2023-11-21 22:24:06,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:06,734 INFO L495 AbstractCegarLoop]: Abstraction has 269 states and 398 transitions. [2023-11-21 22:24:06,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 3.0) internal successors, (42), 14 states have internal predecessors, (42), 3 states have call successors, (3), 3 states have call predecessors, (3), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:06,734 INFO L276 IsEmpty]: Start isEmpty. Operand 269 states and 398 transitions. [2023-11-21 22:24:06,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 22:24:06,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:06,735 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:06,764 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-21 22:24:06,952 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:06,953 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:06,953 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:06,953 INFO L85 PathProgramCache]: Analyzing trace with hash -905176023, now seen corresponding path program 1 times [2023-11-21 22:24:06,954 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:06,954 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870656637] [2023-11-21 22:24:06,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:06,954 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:06,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:06,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:06,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:06,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870656637] [2023-11-21 22:24:06,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870656637] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:24:06,998 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:24:06,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:24:06,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746528775] [2023-11-21 22:24:06,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:24:06,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:24:06,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:07,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:24:07,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:24:07,000 INFO L87 Difference]: Start difference. First operand 269 states and 398 transitions. Second operand has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:07,018 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:07,018 INFO L93 Difference]: Finished difference Result 267 states and 390 transitions. [2023-11-21 22:24:07,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:24:07,019 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-21 22:24:07,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:07,021 INFO L225 Difference]: With dead ends: 267 [2023-11-21 22:24:07,021 INFO L226 Difference]: Without dead ends: 267 [2023-11-21 22:24:07,022 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 [2023-11-21 22:24:07,023 INFO L413 NwaCegarLoop]: 47 mSDtfsCounter, 39 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 47 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:07,024 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 47 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:24:07,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-11-21 22:24:07,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 267. [2023-11-21 22:24:07,036 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 267 states, 226 states have (on average 1.5398230088495575) internal successors, (348), 247 states have internal predecessors, (348), 11 states have call successors, (11), 8 states have call predecessors, (11), 14 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2023-11-21 22:24:07,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 267 states to 267 states and 390 transitions. [2023-11-21 22:24:07,040 INFO L78 Accepts]: Start accepts. Automaton has 267 states and 390 transitions. Word has length 16 [2023-11-21 22:24:07,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:07,041 INFO L495 AbstractCegarLoop]: Abstraction has 267 states and 390 transitions. [2023-11-21 22:24:07,041 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 7.5) internal successors, (15), 2 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:07,041 INFO L276 IsEmpty]: Start isEmpty. Operand 267 states and 390 transitions. [2023-11-21 22:24:07,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2023-11-21 22:24:07,042 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:07,042 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:07,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-21 22:24:07,043 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:07,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:07,044 INFO L85 PathProgramCache]: Analyzing trace with hash -905175767, now seen corresponding path program 1 times [2023-11-21 22:24:07,044 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:07,044 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251698741] [2023-11-21 22:24:07,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:07,044 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:07,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:07,103 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:07,104 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:07,104 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251698741] [2023-11-21 22:24:07,104 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [251698741] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:24:07,104 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:24:07,104 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-21 22:24:07,105 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751406602] [2023-11-21 22:24:07,105 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:24:07,105 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:24:07,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:07,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:24:07,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:24:07,106 INFO L87 Difference]: Start difference. First operand 267 states and 390 transitions. Second operand has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:07,121 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:07,121 INFO L93 Difference]: Finished difference Result 238 states and 342 transitions. [2023-11-21 22:24:07,122 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:24:07,122 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2023-11-21 22:24:07,122 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:07,124 INFO L225 Difference]: With dead ends: 238 [2023-11-21 22:24:07,124 INFO L226 Difference]: Without dead ends: 238 [2023-11-21 22:24:07,124 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 [2023-11-21 22:24:07,125 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 6 mSDsluCounter, 31 mSDsCounter, 0 mSdLazyCounter, 10 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 69 SdHoareTripleChecker+Invalid, 10 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 10 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:07,125 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 69 Invalid, 10 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 10 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:24:07,126 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2023-11-21 22:24:07,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 238. [2023-11-21 22:24:07,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 202 states have (on average 1.4851485148514851) internal successors, (300), 218 states have internal predecessors, (300), 11 states have call successors, (11), 8 states have call predecessors, (11), 14 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2023-11-21 22:24:07,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 342 transitions. [2023-11-21 22:24:07,136 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 342 transitions. Word has length 16 [2023-11-21 22:24:07,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:07,136 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 342 transitions. [2023-11-21 22:24:07,137 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 5.0) internal successors, (15), 3 states have internal predecessors, (15), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:07,137 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 342 transitions. [2023-11-21 22:24:07,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2023-11-21 22:24:07,138 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:07,138 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:07,138 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-21 22:24:07,138 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:07,139 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:07,139 INFO L85 PathProgramCache]: Analyzing trace with hash 2004314431, now seen corresponding path program 1 times [2023-11-21 22:24:07,139 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:07,139 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547481597] [2023-11-21 22:24:07,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:07,140 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:07,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:07,198 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:07,199 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:07,199 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547481597] [2023-11-21 22:24:07,199 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1547481597] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:24:07,199 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-21 22:24:07,199 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-21 22:24:07,199 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [985109497] [2023-11-21 22:24:07,200 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:24:07,200 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:24:07,200 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:07,201 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:24:07,201 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-21 22:24:07,201 INFO L87 Difference]: Start difference. First operand 238 states and 342 transitions. Second operand has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:07,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:07,232 INFO L93 Difference]: Finished difference Result 245 states and 340 transitions. [2023-11-21 22:24:07,233 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:24:07,233 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2023-11-21 22:24:07,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:07,235 INFO L225 Difference]: With dead ends: 245 [2023-11-21 22:24:07,235 INFO L226 Difference]: Without dead ends: 245 [2023-11-21 22:24:07,235 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 [2023-11-21 22:24:07,236 INFO L413 NwaCegarLoop]: 49 mSDtfsCounter, 20 mSDsluCounter, 32 mSDsCounter, 0 mSdLazyCounter, 18 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 20 SdHoareTripleChecker+Valid, 81 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 18 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:07,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [20 Valid, 81 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 18 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:24:07,237 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 245 states. [2023-11-21 22:24:07,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 245 to 238. [2023-11-21 22:24:07,244 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 238 states, 202 states have (on average 1.4653465346534653) internal successors, (296), 218 states have internal predecessors, (296), 11 states have call successors, (11), 8 states have call predecessors, (11), 14 states have return successors, (31), 11 states have call predecessors, (31), 11 states have call successors, (31) [2023-11-21 22:24:07,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 238 states to 238 states and 338 transitions. [2023-11-21 22:24:07,247 INFO L78 Accepts]: Start accepts. Automaton has 238 states and 338 transitions. Word has length 17 [2023-11-21 22:24:07,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:07,248 INFO L495 AbstractCegarLoop]: Abstraction has 238 states and 338 transitions. [2023-11-21 22:24:07,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 8.0) internal successors, (16), 2 states have internal predecessors, (16), 1 states have call successors, (1), 1 states have call predecessors, (1), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-21 22:24:07,248 INFO L276 IsEmpty]: Start isEmpty. Operand 238 states and 338 transitions. [2023-11-21 22:24:07,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2023-11-21 22:24:07,249 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:07,249 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:07,249 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-21 22:24:07,250 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:07,250 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:07,250 INFO L85 PathProgramCache]: Analyzing trace with hash -986025474, now seen corresponding path program 1 times [2023-11-21 22:24:07,250 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:07,251 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517250145] [2023-11-21 22:24:07,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:07,251 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:07,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:07,486 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:24:07,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:07,600 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:07,600 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:07,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517250145] [2023-11-21 22:24:07,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1517250145] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:07,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [343598289] [2023-11-21 22:24:07,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:07,601 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:07,602 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:24:07,603 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:24:07,628 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-21 22:24:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:07,686 INFO L262 TraceCheckSpWp]: Trace formula consists of 197 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-21 22:24:07,689 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:24:07,985 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:24:07,993 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:24:08,083 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:08,084 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:24:08,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [343598289] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:08,272 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:24:08,273 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 5] total 12 [2023-11-21 22:24:08,273 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006095100] [2023-11-21 22:24:08,273 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:24:08,274 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-21 22:24:08,274 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:08,275 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-21 22:24:08,275 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=221, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:24:08,275 INFO L87 Difference]: Start difference. First operand 238 states and 338 transitions. Second operand has 14 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:24:08,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:08,782 INFO L93 Difference]: Finished difference Result 308 states and 416 transitions. [2023-11-21 22:24:08,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:24:08,783 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 21 [2023-11-21 22:24:08,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:08,786 INFO L225 Difference]: With dead ends: 308 [2023-11-21 22:24:08,786 INFO L226 Difference]: Without dead ends: 308 [2023-11-21 22:24:08,786 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=473, Unknown=0, NotChecked=0, Total=650 [2023-11-21 22:24:08,787 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 363 mSDsluCounter, 41 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 71 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 363 SdHoareTripleChecker+Valid, 53 SdHoareTripleChecker+Invalid, 243 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 71 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:08,787 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [363 Valid, 53 Invalid, 243 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [71 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-21 22:24:08,788 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 308 states. [2023-11-21 22:24:08,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 308 to 239. [2023-11-21 22:24:08,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 204 states have (on average 1.4166666666666667) internal successors, (289), 219 states have internal predecessors, (289), 11 states have call successors, (11), 8 states have call predecessors, (11), 13 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30) [2023-11-21 22:24:08,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 330 transitions. [2023-11-21 22:24:08,812 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 330 transitions. Word has length 21 [2023-11-21 22:24:08,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:08,813 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 330 transitions. [2023-11-21 22:24:08,813 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 11 states have (on average 3.272727272727273) internal successors, (36), 10 states have internal predecessors, (36), 3 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:24:08,813 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 330 transitions. [2023-11-21 22:24:08,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2023-11-21 22:24:08,818 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:08,818 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:08,844 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-21 22:24:09,043 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:09,043 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:09,044 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:09,045 INFO L85 PathProgramCache]: Analyzing trace with hash 1617290397, now seen corresponding path program 1 times [2023-11-21 22:24:09,045 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:09,045 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1667399803] [2023-11-21 22:24:09,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:09,045 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:09,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:09,383 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:24:09,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:09,825 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:09,826 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:09,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1667399803] [2023-11-21 22:24:09,826 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1667399803] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:09,826 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696285062] [2023-11-21 22:24:09,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:09,834 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:09,835 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:24:09,836 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:24:09,856 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-21 22:24:09,920 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:09,921 INFO L262 TraceCheckSpWp]: Trace formula consists of 207 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-21 22:24:09,924 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:24:10,245 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:24:10,247 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:24:10,379 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:10,380 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:24:10,559 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1696285062] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:10,559 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:24:10,559 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 6] total 17 [2023-11-21 22:24:10,559 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [808328360] [2023-11-21 22:24:10,559 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:24:10,561 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2023-11-21 22:24:10,561 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:10,561 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2023-11-21 22:24:10,562 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=395, Unknown=0, NotChecked=0, Total=462 [2023-11-21 22:24:10,562 INFO L87 Difference]: Start difference. First operand 239 states and 330 transitions. Second operand has 19 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:24:12,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:12,062 INFO L93 Difference]: Finished difference Result 322 states and 419 transitions. [2023-11-21 22:24:12,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-21 22:24:12,063 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 23 [2023-11-21 22:24:12,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:12,065 INFO L225 Difference]: With dead ends: 322 [2023-11-21 22:24:12,065 INFO L226 Difference]: Without dead ends: 322 [2023-11-21 22:24:12,066 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=399, Invalid=1323, Unknown=0, NotChecked=0, Total=1722 [2023-11-21 22:24:12,067 INFO L413 NwaCegarLoop]: 17 mSDtfsCounter, 646 mSDsluCounter, 119 mSDsCounter, 0 mSdLazyCounter, 602 mSolverCounterSat, 96 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 646 SdHoareTripleChecker+Valid, 136 SdHoareTripleChecker+Invalid, 698 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 96 IncrementalHoareTripleChecker+Valid, 602 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:12,068 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [646 Valid, 136 Invalid, 698 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [96 Valid, 602 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 22:24:12,068 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 322 states. [2023-11-21 22:24:12,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 322 to 241. [2023-11-21 22:24:12,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 206 states have (on average 1.3980582524271845) internal successors, (288), 221 states have internal predecessors, (288), 11 states have call successors, (11), 8 states have call predecessors, (11), 13 states have return successors, (30), 11 states have call predecessors, (30), 11 states have call successors, (30) [2023-11-21 22:24:12,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 329 transitions. [2023-11-21 22:24:12,079 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 329 transitions. Word has length 23 [2023-11-21 22:24:12,079 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:12,079 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 329 transitions. [2023-11-21 22:24:12,080 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 16 states have (on average 2.5) internal successors, (40), 15 states have internal predecessors, (40), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:24:12,080 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 329 transitions. [2023-11-21 22:24:12,080 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2023-11-21 22:24:12,081 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:12,081 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:12,106 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-21 22:24:12,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:12,296 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:12,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:12,297 INFO L85 PathProgramCache]: Analyzing trace with hash -1403605198, now seen corresponding path program 1 times [2023-11-21 22:24:12,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:12,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714003407] [2023-11-21 22:24:12,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:12,298 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:12,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:12,414 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:24:12,419 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:12,476 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:12,477 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:12,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714003407] [2023-11-21 22:24:12,477 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714003407] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:12,477 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [965909856] [2023-11-21 22:24:12,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:12,478 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:12,478 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:24:12,479 INFO L229 MonitoredProcess]: Starting monitored process 7 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:24:12,500 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2023-11-21 22:24:12,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:12,564 INFO L262 TraceCheckSpWp]: Trace formula consists of 209 conjuncts, 14 conjunts are in the unsatisfiable core [2023-11-21 22:24:12,567 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:24:12,650 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-21 22:24:12,651 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-21 22:24:12,692 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:12,693 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:24:12,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [965909856] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:12,781 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:24:12,781 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5] total 8 [2023-11-21 22:24:12,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [327771519] [2023-11-21 22:24:12,782 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:24:12,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2023-11-21 22:24:12,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:12,783 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2023-11-21 22:24:12,783 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:24:12,783 INFO L87 Difference]: Start difference. First operand 241 states and 329 transitions. Second operand has 10 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 22:24:13,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:13,231 INFO L93 Difference]: Finished difference Result 342 states and 430 transitions. [2023-11-21 22:24:13,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-21 22:24:13,232 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) Word has length 24 [2023-11-21 22:24:13,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:13,234 INFO L225 Difference]: With dead ends: 342 [2023-11-21 22:24:13,234 INFO L226 Difference]: Without dead ends: 342 [2023-11-21 22:24:13,235 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=275, Unknown=0, NotChecked=0, Total=380 [2023-11-21 22:24:13,235 INFO L413 NwaCegarLoop]: 24 mSDtfsCounter, 203 mSDsluCounter, 76 mSDsCounter, 0 mSdLazyCounter, 275 mSolverCounterSat, 15 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 203 SdHoareTripleChecker+Valid, 100 SdHoareTripleChecker+Invalid, 290 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 15 IncrementalHoareTripleChecker+Valid, 275 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:13,236 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [203 Valid, 100 Invalid, 290 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [15 Valid, 275 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-21 22:24:13,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 342 states. [2023-11-21 22:24:13,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 342 to 301. [2023-11-21 22:24:13,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 301 states, 263 states have (on average 1.3726235741444868) internal successors, (361), 279 states have internal predecessors, (361), 11 states have call successors, (11), 10 states have call predecessors, (11), 16 states have return successors, (29), 11 states have call predecessors, (29), 11 states have call successors, (29) [2023-11-21 22:24:13,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 301 states to 301 states and 401 transitions. [2023-11-21 22:24:13,247 INFO L78 Accepts]: Start accepts. Automaton has 301 states and 401 transitions. Word has length 24 [2023-11-21 22:24:13,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:13,248 INFO L495 AbstractCegarLoop]: Abstraction has 301 states and 401 transitions. [2023-11-21 22:24:13,248 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 8 states have (on average 3.875) internal successors, (31), 7 states have internal predecessors, (31), 1 states have call successors, (3), 3 states have call predecessors, (3), 2 states have return successors, (2), 1 states have call predecessors, (2), 1 states have call successors, (2) [2023-11-21 22:24:13,248 INFO L276 IsEmpty]: Start isEmpty. Operand 301 states and 401 transitions. [2023-11-21 22:24:13,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2023-11-21 22:24:13,249 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:13,249 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:13,276 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Forceful destruction successful, exit code 0 [2023-11-21 22:24:13,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2023-11-21 22:24:13,466 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:13,467 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:13,467 INFO L85 PathProgramCache]: Analyzing trace with hash -562088129, now seen corresponding path program 1 times [2023-11-21 22:24:13,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:13,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745721675] [2023-11-21 22:24:13,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:13,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:13,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:13,728 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:24:13,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:13,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:13,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:13,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745721675] [2023-11-21 22:24:13,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [745721675] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:13,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94729774] [2023-11-21 22:24:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:13,811 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:13,811 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:24:13,812 INFO L229 MonitoredProcess]: Starting monitored process 8 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:24:13,840 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2023-11-21 22:24:13,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:13,906 INFO L262 TraceCheckSpWp]: Trace formula consists of 211 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-21 22:24:13,908 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:24:14,022 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:24:14,023 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:24:14,108 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:14,108 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:24:14,248 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94729774] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:14,249 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:24:14,249 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 13 [2023-11-21 22:24:14,249 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557427369] [2023-11-21 22:24:14,249 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:24:14,251 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2023-11-21 22:24:14,251 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:14,252 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2023-11-21 22:24:14,252 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2023-11-21 22:24:14,253 INFO L87 Difference]: Start difference. First operand 301 states and 401 transitions. Second operand has 15 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:24:15,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:15,085 INFO L93 Difference]: Finished difference Result 452 states and 558 transitions. [2023-11-21 22:24:15,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-21 22:24:15,086 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 25 [2023-11-21 22:24:15,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:15,089 INFO L225 Difference]: With dead ends: 452 [2023-11-21 22:24:15,089 INFO L226 Difference]: Without dead ends: 452 [2023-11-21 22:24:15,090 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=290, Invalid=766, Unknown=0, NotChecked=0, Total=1056 [2023-11-21 22:24:15,090 INFO L413 NwaCegarLoop]: 32 mSDtfsCounter, 550 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 430 mSolverCounterSat, 46 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 550 SdHoareTripleChecker+Valid, 149 SdHoareTripleChecker+Invalid, 476 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 46 IncrementalHoareTripleChecker+Valid, 430 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:15,090 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [550 Valid, 149 Invalid, 476 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [46 Valid, 430 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-21 22:24:15,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 452 states. [2023-11-21 22:24:15,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 452 to 394. [2023-11-21 22:24:15,102 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 394 states, 351 states have (on average 1.378917378917379) internal successors, (484), 371 states have internal predecessors, (484), 11 states have call successors, (11), 11 states have call predecessors, (11), 21 states have return successors, (27), 11 states have call predecessors, (27), 11 states have call successors, (27) [2023-11-21 22:24:15,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 394 states to 394 states and 522 transitions. [2023-11-21 22:24:15,105 INFO L78 Accepts]: Start accepts. Automaton has 394 states and 522 transitions. Word has length 25 [2023-11-21 22:24:15,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:15,105 INFO L495 AbstractCegarLoop]: Abstraction has 394 states and 522 transitions. [2023-11-21 22:24:15,106 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 10 states have (on average 4.4) internal successors, (44), 9 states have internal predecessors, (44), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:24:15,106 INFO L276 IsEmpty]: Start isEmpty. Operand 394 states and 522 transitions. [2023-11-21 22:24:15,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-21 22:24:15,107 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:15,107 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:15,144 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2023-11-21 22:24:15,332 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2023-11-21 22:24:15,332 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:15,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:15,332 INFO L85 PathProgramCache]: Analyzing trace with hash -177446873, now seen corresponding path program 1 times [2023-11-21 22:24:15,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:15,333 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62497016] [2023-11-21 22:24:15,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:15,333 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:15,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:15,468 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:24:15,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:15,542 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:15,542 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:15,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62497016] [2023-11-21 22:24:15,542 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62497016] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:15,542 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [115621532] [2023-11-21 22:24:15,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:15,543 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:15,543 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:24:15,544 INFO L229 MonitoredProcess]: Starting monitored process 9 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:24:15,568 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2023-11-21 22:24:15,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:15,629 INFO L262 TraceCheckSpWp]: Trace formula consists of 202 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:24:15,632 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:24:15,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:15,759 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:24:15,759 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [115621532] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:24:15,759 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:24:15,759 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [6] total 10 [2023-11-21 22:24:15,760 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1454425017] [2023-11-21 22:24:15,760 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:24:15,760 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:24:15,761 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:15,761 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:24:15,762 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2023-11-21 22:24:15,762 INFO L87 Difference]: Start difference. First operand 394 states and 522 transitions. Second operand has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:24:15,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:15,835 INFO L93 Difference]: Finished difference Result 443 states and 570 transitions. [2023-11-21 22:24:15,836 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:24:15,836 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 26 [2023-11-21 22:24:15,836 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:15,839 INFO L225 Difference]: With dead ends: 443 [2023-11-21 22:24:15,839 INFO L226 Difference]: Without dead ends: 443 [2023-11-21 22:24:15,839 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2023-11-21 22:24:15,840 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 50 mSDsluCounter, 46 mSDsCounter, 0 mSdLazyCounter, 49 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 53 SdHoareTripleChecker+Valid, 77 SdHoareTripleChecker+Invalid, 49 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 49 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:15,840 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [53 Valid, 77 Invalid, 49 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 49 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:24:15,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 443 states. [2023-11-21 22:24:15,851 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 443 to 409. [2023-11-21 22:24:15,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 409 states, 366 states have (on average 1.3633879781420766) internal successors, (499), 386 states have internal predecessors, (499), 11 states have call successors, (11), 11 states have call predecessors, (11), 21 states have return successors, (27), 11 states have call predecessors, (27), 11 states have call successors, (27) [2023-11-21 22:24:15,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 409 states to 409 states and 537 transitions. [2023-11-21 22:24:15,855 INFO L78 Accepts]: Start accepts. Automaton has 409 states and 537 transitions. Word has length 26 [2023-11-21 22:24:15,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:15,856 INFO L495 AbstractCegarLoop]: Abstraction has 409 states and 537 transitions. [2023-11-21 22:24:15,856 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.6) internal successors, (23), 4 states have internal predecessors, (23), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:24:15,856 INFO L276 IsEmpty]: Start isEmpty. Operand 409 states and 537 transitions. [2023-11-21 22:24:15,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2023-11-21 22:24:15,858 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:15,858 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:15,884 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Forceful destruction successful, exit code 0 [2023-11-21 22:24:16,071 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2023-11-21 22:24:16,072 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:16,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:16,072 INFO L85 PathProgramCache]: Analyzing trace with hash -1850205691, now seen corresponding path program 1 times [2023-11-21 22:24:16,072 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:16,072 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78969273] [2023-11-21 22:24:16,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:16,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:16,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:16,336 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:24:16,344 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:16,469 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:16,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:16,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78969273] [2023-11-21 22:24:16,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [78969273] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:16,470 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222189538] [2023-11-21 22:24:16,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:16,470 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:16,470 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:24:16,485 INFO L229 MonitoredProcess]: Starting monitored process 10 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:24:16,508 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2023-11-21 22:24:16,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:16,576 INFO L262 TraceCheckSpWp]: Trace formula consists of 217 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-21 22:24:16,579 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:24:16,804 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:24:16,806 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:24:16,962 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:16,962 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:24:17,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1222189538] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:17,186 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:24:17,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 6] total 16 [2023-11-21 22:24:17,187 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1738483403] [2023-11-21 22:24:17,187 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:24:17,187 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-21 22:24:17,187 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:17,188 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-21 22:24:17,188 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=392, Unknown=0, NotChecked=0, Total=462 [2023-11-21 22:24:17,189 INFO L87 Difference]: Start difference. First operand 409 states and 537 transitions. Second operand has 18 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:24:18,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:18,366 INFO L93 Difference]: Finished difference Result 465 states and 565 transitions. [2023-11-21 22:24:18,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-21 22:24:18,366 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) Word has length 29 [2023-11-21 22:24:18,367 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:18,369 INFO L225 Difference]: With dead ends: 465 [2023-11-21 22:24:18,369 INFO L226 Difference]: Without dead ends: 465 [2023-11-21 22:24:18,370 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 31 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=371, Invalid=1189, Unknown=0, NotChecked=0, Total=1560 [2023-11-21 22:24:18,371 INFO L413 NwaCegarLoop]: 21 mSDtfsCounter, 672 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 547 mSolverCounterSat, 95 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 672 SdHoareTripleChecker+Valid, 127 SdHoareTripleChecker+Invalid, 642 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 95 IncrementalHoareTripleChecker+Valid, 547 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:18,371 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [672 Valid, 127 Invalid, 642 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [95 Valid, 547 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-21 22:24:18,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 465 states. [2023-11-21 22:24:18,382 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 465 to 406. [2023-11-21 22:24:18,383 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 406 states, 366 states have (on average 1.3060109289617485) internal successors, (478), 383 states have internal predecessors, (478), 11 states have call successors, (11), 11 states have call predecessors, (11), 21 states have return successors, (27), 11 states have call predecessors, (27), 11 states have call successors, (27) [2023-11-21 22:24:18,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 406 states to 406 states and 516 transitions. [2023-11-21 22:24:18,386 INFO L78 Accepts]: Start accepts. Automaton has 406 states and 516 transitions. Word has length 29 [2023-11-21 22:24:18,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:18,386 INFO L495 AbstractCegarLoop]: Abstraction has 406 states and 516 transitions. [2023-11-21 22:24:18,387 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 14 states have (on average 3.7142857142857144) internal successors, (52), 13 states have internal predecessors, (52), 4 states have call successors, (4), 4 states have call predecessors, (4), 2 states have return successors, (2), 2 states have call predecessors, (2), 2 states have call successors, (2) [2023-11-21 22:24:18,387 INFO L276 IsEmpty]: Start isEmpty. Operand 406 states and 516 transitions. [2023-11-21 22:24:18,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 35 [2023-11-21 22:24:18,388 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:18,388 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:18,416 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2023-11-21 22:24:18,608 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2023-11-21 22:24:18,608 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:18,609 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:18,609 INFO L85 PathProgramCache]: Analyzing trace with hash 2145365376, now seen corresponding path program 1 times [2023-11-21 22:24:18,609 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:18,609 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1395080401] [2023-11-21 22:24:18,609 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:18,609 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:18,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:18,713 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:24:18,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:18,805 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 5 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 22:24:18,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:18,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1395080401] [2023-11-21 22:24:18,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1395080401] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:18,806 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1099876384] [2023-11-21 22:24:18,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:18,806 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:18,806 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:24:18,807 INFO L229 MonitoredProcess]: Starting monitored process 11 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:24:18,836 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2023-11-21 22:24:18,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:18,903 INFO L262 TraceCheckSpWp]: Trace formula consists of 222 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-21 22:24:18,907 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:24:19,110 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-21 22:24:19,113 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-21 22:24:19,210 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:24:19,211 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:24:19,259 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 [2023-11-21 22:24:19,474 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 [2023-11-21 22:24:19,501 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 2 proven. 5 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-21 22:24:19,501 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1099876384] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:24:19,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:24:19,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 5, 5] total 15 [2023-11-21 22:24:19,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544625394] [2023-11-21 22:24:19,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:24:19,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-21 22:24:19,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:19,503 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-21 22:24:19,504 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-11-21 22:24:19,504 INFO L87 Difference]: Start difference. First operand 406 states and 516 transitions. Second operand has 17 states, 12 states have (on average 6.333333333333333) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:24:19,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:19,737 INFO L93 Difference]: Finished difference Result 423 states and 527 transitions. [2023-11-21 22:24:19,737 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-21 22:24:19,738 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 12 states have (on average 6.333333333333333) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 34 [2023-11-21 22:24:19,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:19,740 INFO L225 Difference]: With dead ends: 423 [2023-11-21 22:24:19,740 INFO L226 Difference]: Without dead ends: 423 [2023-11-21 22:24:19,741 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=135, Invalid=285, Unknown=0, NotChecked=0, Total=420 [2023-11-21 22:24:19,741 INFO L413 NwaCegarLoop]: 20 mSDtfsCounter, 205 mSDsluCounter, 43 mSDsCounter, 0 mSdLazyCounter, 152 mSolverCounterSat, 32 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 205 SdHoareTripleChecker+Valid, 63 SdHoareTripleChecker+Invalid, 184 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 32 IncrementalHoareTripleChecker+Valid, 152 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:19,742 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [205 Valid, 63 Invalid, 184 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [32 Valid, 152 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-21 22:24:19,743 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 423 states. [2023-11-21 22:24:19,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 423 to 405. [2023-11-21 22:24:19,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 405 states, 366 states have (on average 1.2978142076502732) internal successors, (475), 382 states have internal predecessors, (475), 11 states have call successors, (11), 11 states have call predecessors, (11), 21 states have return successors, (27), 11 states have call predecessors, (27), 11 states have call successors, (27) [2023-11-21 22:24:19,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 405 states to 405 states and 513 transitions. [2023-11-21 22:24:19,754 INFO L78 Accepts]: Start accepts. Automaton has 405 states and 513 transitions. Word has length 34 [2023-11-21 22:24:19,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:19,755 INFO L495 AbstractCegarLoop]: Abstraction has 405 states and 513 transitions. [2023-11-21 22:24:19,755 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 12 states have (on average 6.333333333333333) internal successors, (76), 14 states have internal predecessors, (76), 6 states have call successors, (6), 5 states have call predecessors, (6), 3 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:24:19,755 INFO L276 IsEmpty]: Start isEmpty. Operand 405 states and 513 transitions. [2023-11-21 22:24:19,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 36 [2023-11-21 22:24:19,756 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:19,756 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:19,781 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2023-11-21 22:24:19,976 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,11 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:19,976 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:19,977 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:19,977 INFO L85 PathProgramCache]: Analyzing trace with hash 2081817197, now seen corresponding path program 1 times [2023-11-21 22:24:19,977 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:19,977 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [768786607] [2023-11-21 22:24:19,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:19,977 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:19,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:20,213 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:24:20,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:20,615 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 0 proven. 14 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:20,615 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:20,615 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [768786607] [2023-11-21 22:24:20,615 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [768786607] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:20,616 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1271529783] [2023-11-21 22:24:20,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:20,616 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:20,616 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:24:20,617 INFO L229 MonitoredProcess]: Starting monitored process 12 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:24:20,640 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2023-11-21 22:24:20,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:20,711 INFO L262 TraceCheckSpWp]: Trace formula consists of 230 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:24:20,714 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:24:21,144 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:21,145 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:24:21,501 INFO L134 CoverageAnalysis]: Checked inductivity of 14 backedges. 7 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:21,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1271529783] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:24:21,502 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:24:21,502 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 7, 7] total 24 [2023-11-21 22:24:21,502 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [566897841] [2023-11-21 22:24:21,502 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:24:21,503 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-21 22:24:21,503 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:21,504 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-21 22:24:21,505 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=519, Unknown=0, NotChecked=0, Total=600 [2023-11-21 22:24:21,505 INFO L87 Difference]: Start difference. First operand 405 states and 513 transitions. Second operand has 25 states, 22 states have (on average 4.181818181818182) internal successors, (92), 20 states have internal predecessors, (92), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:24:23,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:23,507 INFO L93 Difference]: Finished difference Result 618 states and 743 transitions. [2023-11-21 22:24:23,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2023-11-21 22:24:23,511 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 22 states have (on average 4.181818181818182) internal successors, (92), 20 states have internal predecessors, (92), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) Word has length 35 [2023-11-21 22:24:23,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:23,515 INFO L225 Difference]: With dead ends: 618 [2023-11-21 22:24:23,515 INFO L226 Difference]: Without dead ends: 618 [2023-11-21 22:24:23,516 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 109 GetRequests, 57 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 638 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=511, Invalid=2351, Unknown=0, NotChecked=0, Total=2862 [2023-11-21 22:24:23,517 INFO L413 NwaCegarLoop]: 26 mSDtfsCounter, 663 mSDsluCounter, 193 mSDsCounter, 0 mSdLazyCounter, 843 mSolverCounterSat, 69 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 663 SdHoareTripleChecker+Valid, 219 SdHoareTripleChecker+Invalid, 912 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 69 IncrementalHoareTripleChecker+Valid, 843 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.7s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:23,517 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [663 Valid, 219 Invalid, 912 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [69 Valid, 843 Invalid, 0 Unknown, 0 Unchecked, 0.7s Time] [2023-11-21 22:24:23,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 618 states. [2023-11-21 22:24:23,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 618 to 415. [2023-11-21 22:24:23,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 415 states, 378 states have (on average 1.2804232804232805) internal successors, (484), 394 states have internal predecessors, (484), 10 states have call successors, (10), 10 states have call predecessors, (10), 20 states have return successors, (25), 10 states have call predecessors, (25), 10 states have call successors, (25) [2023-11-21 22:24:23,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 415 states to 415 states and 519 transitions. [2023-11-21 22:24:23,538 INFO L78 Accepts]: Start accepts. Automaton has 415 states and 519 transitions. Word has length 35 [2023-11-21 22:24:23,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:23,538 INFO L495 AbstractCegarLoop]: Abstraction has 415 states and 519 transitions. [2023-11-21 22:24:23,539 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 22 states have (on average 4.181818181818182) internal successors, (92), 20 states have internal predecessors, (92), 5 states have call successors, (5), 5 states have call predecessors, (5), 3 states have return successors, (3), 2 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-21 22:24:23,539 INFO L276 IsEmpty]: Start isEmpty. Operand 415 states and 519 transitions. [2023-11-21 22:24:23,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 40 [2023-11-21 22:24:23,540 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:23,540 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:23,566 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2023-11-21 22:24:23,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,12 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:23,761 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:23,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:23,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1072050731, now seen corresponding path program 1 times [2023-11-21 22:24:23,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:23,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466976505] [2023-11-21 22:24:23,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:23,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:23,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:23,837 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:24:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:23,846 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 25 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-21 22:24:23,846 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:23,846 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466976505] [2023-11-21 22:24:23,847 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1466976505] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:23,847 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [589486022] [2023-11-21 22:24:23,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:23,847 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:23,847 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:24:23,848 INFO L229 MonitoredProcess]: Starting monitored process 13 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:24:23,864 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2023-11-21 22:24:23,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:23,940 INFO L262 TraceCheckSpWp]: Trace formula consists of 247 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-21 22:24:23,942 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:24:23,976 INFO L134 CoverageAnalysis]: Checked inductivity of 35 backedges. 34 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:24:23,977 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:24:23,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [589486022] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:24:23,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:24:23,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [6] total 7 [2023-11-21 22:24:23,978 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762343570] [2023-11-21 22:24:23,978 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:24:23,978 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-21 22:24:23,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:23,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-21 22:24:23,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:24:23,979 INFO L87 Difference]: Start difference. First operand 415 states and 519 transitions. Second operand has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:24:24,012 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:24,012 INFO L93 Difference]: Finished difference Result 258 states and 302 transitions. [2023-11-21 22:24:24,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-21 22:24:24,013 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 39 [2023-11-21 22:24:24,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:24,014 INFO L225 Difference]: With dead ends: 258 [2023-11-21 22:24:24,014 INFO L226 Difference]: Without dead ends: 258 [2023-11-21 22:24:24,015 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 40 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2023-11-21 22:24:24,016 INFO L413 NwaCegarLoop]: 45 mSDtfsCounter, 39 mSDsluCounter, 68 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 39 SdHoareTripleChecker+Valid, 113 SdHoareTripleChecker+Invalid, 36 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:24,017 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [39 Valid, 113 Invalid, 36 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:24:24,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 258 states. [2023-11-21 22:24:24,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 258 to 241. [2023-11-21 22:24:24,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 214 states have (on average 1.233644859813084) internal successors, (264), 226 states have internal predecessors, (264), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2023-11-21 22:24:24,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 286 transitions. [2023-11-21 22:24:24,024 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 286 transitions. Word has length 39 [2023-11-21 22:24:24,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:24,024 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 286 transitions. [2023-11-21 22:24:24,024 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 7.2) internal successors, (36), 5 states have internal predecessors, (36), 1 states have call successors, (2), 1 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:24:24,025 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 286 transitions. [2023-11-21 22:24:24,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 41 [2023-11-21 22:24:24,025 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:24,025 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:24,050 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2023-11-21 22:24:24,245 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,13 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:24,245 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:24,246 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:24,246 INFO L85 PathProgramCache]: Analyzing trace with hash 1635267805, now seen corresponding path program 1 times [2023-11-21 22:24:24,246 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:24,246 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [881174582] [2023-11-21 22:24:24,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:24,246 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:24,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:24,475 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:24:24,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:24,538 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-21 22:24:24,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:24,587 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 15 trivial. 0 not checked. [2023-11-21 22:24:24,588 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:24,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [881174582] [2023-11-21 22:24:24,588 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [881174582] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:24,588 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075595407] [2023-11-21 22:24:24,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:24,588 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:24,589 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:24:24,590 INFO L229 MonitoredProcess]: Starting monitored process 14 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:24:24,608 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2023-11-21 22:24:24,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:24,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 288 conjuncts, 19 conjunts are in the unsatisfiable core [2023-11-21 22:24:24,711 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:24:24,783 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-21 22:24:24,784 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-21 22:24:24,811 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_parse_input_c1_~x~0#1.base_77| Int)) (= |c_#valid| (store |c_old(#valid)| |v_parse_input_c1_~x~0#1.base_77| 1))) is different from true [2023-11-21 22:24:24,827 INFO L349 Elim1Store]: treesize reduction 15, result has 25.0 percent of original size [2023-11-21 22:24:24,828 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 12 treesize of output 14 [2023-11-21 22:24:24,883 INFO L134 CoverageAnalysis]: Checked inductivity of 27 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 12 trivial. 3 not checked. [2023-11-21 22:24:24,884 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:24:25,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1075595407] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:25,057 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:24:25,057 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6] total 11 [2023-11-21 22:24:25,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1018389612] [2023-11-21 22:24:25,058 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:24:25,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-21 22:24:25,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:25,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-21 22:24:25,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=137, Unknown=1, NotChecked=24, Total=210 [2023-11-21 22:24:25,059 INFO L87 Difference]: Start difference. First operand 241 states and 286 transitions. Second operand has 13 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-21 22:24:25,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:25,702 INFO L93 Difference]: Finished difference Result 264 states and 299 transitions. [2023-11-21 22:24:25,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-21 22:24:25,708 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) Word has length 40 [2023-11-21 22:24:25,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:25,710 INFO L225 Difference]: With dead ends: 264 [2023-11-21 22:24:25,710 INFO L226 Difference]: Without dead ends: 264 [2023-11-21 22:24:25,711 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 58 SyntacticMatches, 3 SemanticMatches, 25 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=465, Unknown=1, NotChecked=48, Total=702 [2023-11-21 22:24:25,711 INFO L413 NwaCegarLoop]: 31 mSDtfsCounter, 235 mSDsluCounter, 106 mSDsCounter, 0 mSdLazyCounter, 377 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 235 SdHoareTripleChecker+Valid, 137 SdHoareTripleChecker+Invalid, 549 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 377 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 154 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:25,712 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [235 Valid, 137 Invalid, 549 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 377 Invalid, 0 Unknown, 154 Unchecked, 0.4s Time] [2023-11-21 22:24:25,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 264 states. [2023-11-21 22:24:25,719 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 264 to 241. [2023-11-21 22:24:25,720 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 241 states, 214 states have (on average 1.219626168224299) internal successors, (261), 226 states have internal predecessors, (261), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2023-11-21 22:24:25,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 241 states to 241 states and 283 transitions. [2023-11-21 22:24:25,722 INFO L78 Accepts]: Start accepts. Automaton has 241 states and 283 transitions. Word has length 40 [2023-11-21 22:24:25,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:25,722 INFO L495 AbstractCegarLoop]: Abstraction has 241 states and 283 transitions. [2023-11-21 22:24:25,723 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 10 states have (on average 3.5) internal successors, (35), 9 states have internal predecessors, (35), 2 states have call successors, (6), 4 states have call predecessors, (6), 3 states have return successors, (4), 1 states have call predecessors, (4), 2 states have call successors, (4) [2023-11-21 22:24:25,723 INFO L276 IsEmpty]: Start isEmpty. Operand 241 states and 283 transitions. [2023-11-21 22:24:25,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-21 22:24:25,724 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:25,724 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:25,748 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2023-11-21 22:24:25,942 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,14 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:25,942 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:25,942 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:25,942 INFO L85 PathProgramCache]: Analyzing trace with hash -846305548, now seen corresponding path program 1 times [2023-11-21 22:24:25,943 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:25,943 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183748476] [2023-11-21 22:24:25,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:25,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:25,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:26,240 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:24:26,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:26,396 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-21 22:24:26,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:26,464 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 28 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:24:26,465 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:26,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183748476] [2023-11-21 22:24:26,465 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183748476] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:26,465 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [281479744] [2023-11-21 22:24:26,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:26,465 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:26,466 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:24:26,467 INFO L229 MonitoredProcess]: Starting monitored process 15 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:24:26,490 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2023-11-21 22:24:26,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:26,572 INFO L262 TraceCheckSpWp]: Trace formula consists of 290 conjuncts, 25 conjunts are in the unsatisfiable core [2023-11-21 22:24:26,574 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:24:26,678 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:24:26,679 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:24:26,728 WARN L876 $PredicateComparison]: unable to prove that (exists ((|v_parse_input_c1_~x~0#1.base_98| Int)) (let ((.cse0 (select |c_#length| |v_parse_input_c1_~x~0#1.base_98|))) (and (<= 1 .cse0) (= (store |c_old(#length)| |v_parse_input_c1_~x~0#1.base_98| .cse0) |c_#length|)))) is different from true [2023-11-21 22:24:26,756 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-21 22:24:26,756 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-21 22:24:26,845 INFO L134 CoverageAnalysis]: Checked inductivity of 29 backedges. 0 proven. 26 refuted. 0 times theorem prover too weak. 0 trivial. 3 not checked. [2023-11-21 22:24:26,845 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:24:27,130 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [281479744] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:27,130 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:24:27,130 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 9] total 19 [2023-11-21 22:24:27,130 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1914630623] [2023-11-21 22:24:27,130 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:24:27,130 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-21 22:24:27,131 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:27,131 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-21 22:24:27,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=451, Unknown=1, NotChecked=44, Total=600 [2023-11-21 22:24:27,132 INFO L87 Difference]: Start difference. First operand 241 states and 283 transitions. Second operand has 21 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 22:24:27,919 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:27,919 INFO L93 Difference]: Finished difference Result 255 states and 285 transitions. [2023-11-21 22:24:27,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-21 22:24:27,920 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) Word has length 41 [2023-11-21 22:24:27,920 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:27,921 INFO L225 Difference]: With dead ends: 255 [2023-11-21 22:24:27,922 INFO L226 Difference]: Without dead ends: 255 [2023-11-21 22:24:27,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 89 GetRequests, 50 SyntacticMatches, 3 SemanticMatches, 36 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=358, Invalid=977, Unknown=1, NotChecked=70, Total=1406 [2023-11-21 22:24:27,923 INFO L413 NwaCegarLoop]: 33 mSDtfsCounter, 275 mSDsluCounter, 144 mSDsCounter, 0 mSdLazyCounter, 407 mSolverCounterSat, 38 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 275 SdHoareTripleChecker+Valid, 177 SdHoareTripleChecker+Invalid, 567 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 38 IncrementalHoareTripleChecker+Valid, 407 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 122 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:27,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [275 Valid, 177 Invalid, 567 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [38 Valid, 407 Invalid, 0 Unknown, 122 Unchecked, 0.4s Time] [2023-11-21 22:24:27,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2023-11-21 22:24:27,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 240. [2023-11-21 22:24:27,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 240 states, 214 states have (on average 1.1822429906542056) internal successors, (253), 225 states have internal predecessors, (253), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2023-11-21 22:24:27,931 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 240 states to 240 states and 275 transitions. [2023-11-21 22:24:27,931 INFO L78 Accepts]: Start accepts. Automaton has 240 states and 275 transitions. Word has length 41 [2023-11-21 22:24:27,931 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:27,931 INFO L495 AbstractCegarLoop]: Abstraction has 240 states and 275 transitions. [2023-11-21 22:24:27,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 14 states have (on average 5.142857142857143) internal successors, (72), 13 states have internal predecessors, (72), 6 states have call successors, (6), 5 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 4 states have call successors, (4) [2023-11-21 22:24:27,932 INFO L276 IsEmpty]: Start isEmpty. Operand 240 states and 275 transitions. [2023-11-21 22:24:27,932 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-21 22:24:27,933 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:27,933 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:27,953 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2023-11-21 22:24:28,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 15 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2023-11-21 22:24:28,153 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:28,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:28,153 INFO L85 PathProgramCache]: Analyzing trace with hash 319814587, now seen corresponding path program 1 times [2023-11-21 22:24:28,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:28,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131313544] [2023-11-21 22:24:28,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:28,154 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:28,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:28,261 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:24:28,265 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 22:24:28,285 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:28,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131313544] [2023-11-21 22:24:28,285 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131313544] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:28,285 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [667344612] [2023-11-21 22:24:28,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:28,286 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:28,286 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:24:28,287 INFO L229 MonitoredProcess]: Starting monitored process 16 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:24:28,308 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2023-11-21 22:24:28,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:28,391 INFO L262 TraceCheckSpWp]: Trace formula consists of 265 conjuncts, 6 conjunts are in the unsatisfiable core [2023-11-21 22:24:28,396 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:24:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 22:24:28,642 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:24:28,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [667344612] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:24:28,643 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:24:28,643 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [3] total 5 [2023-11-21 22:24:28,643 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593267963] [2023-11-21 22:24:28,643 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:24:28,643 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-21 22:24:28,644 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:28,644 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-21 22:24:28,644 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:24:28,644 INFO L87 Difference]: Start difference. First operand 240 states and 275 transitions. Second operand has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:24:28,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:28,674 INFO L93 Difference]: Finished difference Result 244 states and 276 transitions. [2023-11-21 22:24:28,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:24:28,675 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 41 [2023-11-21 22:24:28,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:28,676 INFO L225 Difference]: With dead ends: 244 [2023-11-21 22:24:28,676 INFO L226 Difference]: Without dead ends: 244 [2023-11-21 22:24:28,677 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 42 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2023-11-21 22:24:28,678 INFO L413 NwaCegarLoop]: 42 mSDtfsCounter, 44 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 5 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 44 SdHoareTripleChecker+Valid, 64 SdHoareTripleChecker+Invalid, 19 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 5 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:28,678 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [44 Valid, 64 Invalid, 19 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [5 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:24:28,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2023-11-21 22:24:28,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 239. [2023-11-21 22:24:28,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 239 states, 214 states have (on average 1.1682242990654206) internal successors, (250), 224 states have internal predecessors, (250), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2023-11-21 22:24:28,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 239 states to 239 states and 272 transitions. [2023-11-21 22:24:28,685 INFO L78 Accepts]: Start accepts. Automaton has 239 states and 272 transitions. Word has length 41 [2023-11-21 22:24:28,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:28,685 INFO L495 AbstractCegarLoop]: Abstraction has 239 states and 272 transitions. [2023-11-21 22:24:28,685 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 10.666666666666666) internal successors, (32), 4 states have internal predecessors, (32), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:24:28,685 INFO L276 IsEmpty]: Start isEmpty. Operand 239 states and 272 transitions. [2023-11-21 22:24:28,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 43 [2023-11-21 22:24:28,686 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:28,686 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:28,716 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2023-11-21 22:24:28,900 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2023-11-21 22:24:28,900 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:28,901 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:28,901 INFO L85 PathProgramCache]: Analyzing trace with hash 1324317679, now seen corresponding path program 1 times [2023-11-21 22:24:28,901 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:28,901 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1217047774] [2023-11-21 22:24:28,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:28,901 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:28,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:29,016 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:24:29,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:29,055 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 18 proven. 1 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 22:24:29,055 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:29,055 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1217047774] [2023-11-21 22:24:29,055 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1217047774] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:29,056 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220548404] [2023-11-21 22:24:29,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:29,056 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:29,056 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:24:29,061 INFO L229 MonitoredProcess]: Starting monitored process 17 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:24:29,080 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2023-11-21 22:24:29,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:29,175 INFO L262 TraceCheckSpWp]: Trace formula consists of 267 conjuncts, 12 conjunts are in the unsatisfiable core [2023-11-21 22:24:29,177 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:24:29,184 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 6 treesize of output 5 [2023-11-21 22:24:29,276 INFO L134 CoverageAnalysis]: Checked inductivity of 26 backedges. 19 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-21 22:24:29,277 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-21 22:24:29,277 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1220548404] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-21 22:24:29,277 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-21 22:24:29,277 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [3] total 4 [2023-11-21 22:24:29,277 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355083498] [2023-11-21 22:24:29,277 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-21 22:24:29,278 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-21 22:24:29,278 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:29,278 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-21 22:24:29,278 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:24:29,279 INFO L87 Difference]: Start difference. First operand 239 states and 272 transitions. Second operand has 3 states, 2 states have (on average 16.5) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:24:29,313 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:29,313 INFO L93 Difference]: Finished difference Result 252 states and 282 transitions. [2023-11-21 22:24:29,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-21 22:24:29,318 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 16.5) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 42 [2023-11-21 22:24:29,318 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:29,319 INFO L225 Difference]: With dead ends: 252 [2023-11-21 22:24:29,319 INFO L226 Difference]: Without dead ends: 252 [2023-11-21 22:24:29,320 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 44 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2023-11-21 22:24:29,320 INFO L413 NwaCegarLoop]: 38 mSDtfsCounter, 10 mSDsluCounter, 22 mSDsCounter, 0 mSdLazyCounter, 29 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 10 SdHoareTripleChecker+Valid, 60 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 [2023-11-21 22:24:29,321 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [10 Valid, 60 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 29 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-21 22:24:29,321 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2023-11-21 22:24:29,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 243. [2023-11-21 22:24:29,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 243 states, 218 states have (on average 1.1559633027522935) internal successors, (252), 228 states have internal predecessors, (252), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2023-11-21 22:24:29,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 243 states to 243 states and 274 transitions. [2023-11-21 22:24:29,333 INFO L78 Accepts]: Start accepts. Automaton has 243 states and 274 transitions. Word has length 42 [2023-11-21 22:24:29,334 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:29,334 INFO L495 AbstractCegarLoop]: Abstraction has 243 states and 274 transitions. [2023-11-21 22:24:29,334 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 16.5) internal successors, (33), 3 states have internal predecessors, (33), 2 states have call successors, (2), 2 states have call predecessors, (2), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-21 22:24:29,336 INFO L276 IsEmpty]: Start isEmpty. Operand 243 states and 274 transitions. [2023-11-21 22:24:29,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 48 [2023-11-21 22:24:29,337 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:29,337 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:29,362 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Forceful destruction successful, exit code 0 [2023-11-21 22:24:29,552 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2023-11-21 22:24:29,553 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:29,553 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:29,553 INFO L85 PathProgramCache]: Analyzing trace with hash -678331687, now seen corresponding path program 1 times [2023-11-21 22:24:29,553 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:29,553 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1095321295] [2023-11-21 22:24:29,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:29,553 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:29,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:30,052 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:24:30,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:30,128 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-21 22:24:30,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:30,216 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:24:30,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:30,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1095321295] [2023-11-21 22:24:30,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1095321295] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:30,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1940817834] [2023-11-21 22:24:30,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:30,218 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:30,218 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:24:30,219 INFO L229 MonitoredProcess]: Starting monitored process 18 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:24:30,229 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2023-11-21 22:24:30,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:30,335 INFO L262 TraceCheckSpWp]: Trace formula consists of 306 conjuncts, 50 conjunts are in the unsatisfiable core [2023-11-21 22:24:30,338 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:24:30,914 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:24:30,919 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:24:30,939 INFO L349 Elim1Store]: treesize reduction 20, result has 33.3 percent of original size [2023-11-21 22:24:30,939 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 2 case distinctions, treesize of input 19 treesize of output 16 [2023-11-21 22:24:31,326 INFO L190 IndexEqualityManager]: detected not equals via solver [2023-11-21 22:24:31,327 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 1 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 9 [2023-11-21 22:24:31,665 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 7 [2023-11-21 22:24:31,670 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:24:31,671 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 15 treesize of output 7 [2023-11-21 22:24:31,705 INFO L134 CoverageAnalysis]: Checked inductivity of 43 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-21 22:24:31,705 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:24:31,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1940817834] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:31,996 INFO L185 FreeRefinementEngine]: Found 0 perfect and 2 imperfect interpolant sequences. [2023-11-21 22:24:31,996 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 10] total 22 [2023-11-21 22:24:31,996 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352925161] [2023-11-21 22:24:31,996 INFO L85 oduleStraightlineAll]: Using 2 imperfect interpolants to construct interpolant automaton [2023-11-21 22:24:31,996 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 24 states [2023-11-21 22:24:31,997 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:31,997 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2023-11-21 22:24:31,998 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=704, Unknown=0, NotChecked=0, Total=812 [2023-11-21 22:24:31,998 INFO L87 Difference]: Start difference. First operand 243 states and 274 transitions. Second operand has 24 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 22:24:33,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:33,821 INFO L93 Difference]: Finished difference Result 267 states and 295 transitions. [2023-11-21 22:24:33,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-21 22:24:33,821 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) Word has length 47 [2023-11-21 22:24:33,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:33,823 INFO L225 Difference]: With dead ends: 267 [2023-11-21 22:24:33,823 INFO L226 Difference]: Without dead ends: 267 [2023-11-21 22:24:33,824 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 98 GetRequests, 48 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=570, Invalid=2082, Unknown=0, NotChecked=0, Total=2652 [2023-11-21 22:24:33,825 INFO L413 NwaCegarLoop]: 16 mSDtfsCounter, 506 mSDsluCounter, 117 mSDsCounter, 0 mSdLazyCounter, 448 mSolverCounterSat, 77 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 506 SdHoareTripleChecker+Valid, 133 SdHoareTripleChecker+Invalid, 525 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 77 IncrementalHoareTripleChecker+Valid, 448 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:33,825 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [506 Valid, 133 Invalid, 525 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [77 Valid, 448 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 22:24:33,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 267 states. [2023-11-21 22:24:33,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 267 to 242. [2023-11-21 22:24:33,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 218 states have (on average 1.151376146788991) internal successors, (251), 227 states have internal predecessors, (251), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2023-11-21 22:24:33,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 273 transitions. [2023-11-21 22:24:33,833 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 273 transitions. Word has length 47 [2023-11-21 22:24:33,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:33,833 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 273 transitions. [2023-11-21 22:24:33,833 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 24 states, 20 states have (on average 4.2) internal successors, (84), 19 states have internal predecessors, (84), 5 states have call successors, (6), 4 states have call predecessors, (6), 4 states have return successors, (4), 4 states have call predecessors, (4), 3 states have call successors, (4) [2023-11-21 22:24:33,833 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 273 transitions. [2023-11-21 22:24:33,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-21 22:24:33,834 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:33,834 INFO L195 NwaCegarLoop]: trace histogram [4, 4, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:33,855 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2023-11-21 22:24:34,035 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2023-11-21 22:24:34,035 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:34,035 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:34,035 INFO L85 PathProgramCache]: Analyzing trace with hash 1173761122, now seen corresponding path program 1 times [2023-11-21 22:24:34,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:34,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2004411781] [2023-11-21 22:24:34,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:34,036 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:34,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:34,323 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 1 [2023-11-21 22:24:34,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:34,613 INFO L376 atingTraceCheckCraig]: Compute interpolants for subsequence at non-pending call position 17 [2023-11-21 22:24:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:34,729 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 32 refuted. 0 times theorem prover too weak. 8 trivial. 0 not checked. [2023-11-21 22:24:34,729 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2023-11-21 22:24:34,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2004411781] [2023-11-21 22:24:34,729 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2004411781] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-21 22:24:34,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [427785626] [2023-11-21 22:24:34,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:34,730 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-21 22:24:34,730 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 [2023-11-21 22:24:34,731 INFO L229 MonitoredProcess]: Starting monitored process 19 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-21 22:24:34,752 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2023-11-21 22:24:34,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-21 22:24:34,848 INFO L262 TraceCheckSpWp]: Trace formula consists of 309 conjuncts, 30 conjunts are in the unsatisfiable core [2023-11-21 22:24:34,852 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-21 22:24:35,058 INFO L349 Elim1Store]: treesize reduction 4, result has 50.0 percent of original size [2023-11-21 22:24:35,058 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 11 treesize of output 11 [2023-11-21 22:24:35,433 INFO L349 Elim1Store]: treesize reduction 13, result has 40.9 percent of original size [2023-11-21 22:24:35,433 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 1 case distinctions, treesize of input 14 treesize of output 13 [2023-11-21 22:24:35,621 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:24:35,621 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-21 22:24:35,705 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 40 treesize of output 28 [2023-11-21 22:24:35,963 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-21 22:24:35,964 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 2 select indices, 2 select index equivalence classes, 1 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 36 treesize of output 40 [2023-11-21 22:24:36,343 INFO L134 CoverageAnalysis]: Checked inductivity of 40 backedges. 1 proven. 35 refuted. 0 times theorem prover too weak. 4 trivial. 0 not checked. [2023-11-21 22:24:36,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [427785626] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-21 22:24:36,343 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-21 22:24:36,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 11, 12] total 36 [2023-11-21 22:24:36,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1725873714] [2023-11-21 22:24:36,344 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-21 22:24:36,344 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 38 states [2023-11-21 22:24:36,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2023-11-21 22:24:36,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 38 interpolants. [2023-11-21 22:24:36,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=165, Invalid=1241, Unknown=0, NotChecked=0, Total=1406 [2023-11-21 22:24:36,346 INFO L87 Difference]: Start difference. First operand 242 states and 273 transitions. Second operand has 38 states, 32 states have (on average 3.90625) internal successors, (125), 29 states have internal predecessors, (125), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 22:24:37,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-21 22:24:37,397 INFO L93 Difference]: Finished difference Result 260 states and 290 transitions. [2023-11-21 22:24:37,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2023-11-21 22:24:37,398 INFO L78 Accepts]: Start accepts. Automaton has has 38 states, 32 states have (on average 3.90625) internal successors, (125), 29 states have internal predecessors, (125), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) Word has length 51 [2023-11-21 22:24:37,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-21 22:24:37,399 INFO L225 Difference]: With dead ends: 260 [2023-11-21 22:24:37,399 INFO L226 Difference]: Without dead ends: 260 [2023-11-21 22:24:37,400 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 129 GetRequests, 80 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=504, Invalid=2046, Unknown=0, NotChecked=0, Total=2550 [2023-11-21 22:24:37,401 INFO L413 NwaCegarLoop]: 18 mSDtfsCounter, 351 mSDsluCounter, 176 mSDsCounter, 0 mSdLazyCounter, 686 mSolverCounterSat, 126 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 351 SdHoareTripleChecker+Valid, 194 SdHoareTripleChecker+Invalid, 812 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 126 IncrementalHoareTripleChecker+Valid, 686 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-21 22:24:37,401 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [351 Valid, 194 Invalid, 812 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [126 Valid, 686 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-21 22:24:37,402 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2023-11-21 22:24:37,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 242. [2023-11-21 22:24:37,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 242 states, 218 states have (on average 1.146788990825688) internal successors, (250), 227 states have internal predecessors, (250), 7 states have call successors, (7), 7 states have call predecessors, (7), 13 states have return successors, (15), 7 states have call predecessors, (15), 7 states have call successors, (15) [2023-11-21 22:24:37,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 242 states to 242 states and 272 transitions. [2023-11-21 22:24:37,410 INFO L78 Accepts]: Start accepts. Automaton has 242 states and 272 transitions. Word has length 51 [2023-11-21 22:24:37,410 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-21 22:24:37,411 INFO L495 AbstractCegarLoop]: Abstraction has 242 states and 272 transitions. [2023-11-21 22:24:37,411 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 38 states, 32 states have (on average 3.90625) internal successors, (125), 29 states have internal predecessors, (125), 8 states have call successors, (9), 8 states have call predecessors, (9), 6 states have return successors, (6), 6 states have call predecessors, (6), 6 states have call successors, (6) [2023-11-21 22:24:37,411 INFO L276 IsEmpty]: Start isEmpty. Operand 242 states and 272 transitions. [2023-11-21 22:24:37,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 52 [2023-11-21 22:24:37,412 INFO L187 NwaCegarLoop]: Found error trace [2023-11-21 22:24:37,412 INFO L195 NwaCegarLoop]: trace histogram [3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:37,437 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2023-11-21 22:24:37,632 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2023-11-21 22:24:37,632 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK === [parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (and 17 more)] === [2023-11-21 22:24:37,633 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-21 22:24:37,633 INFO L85 PathProgramCache]: Analyzing trace with hash -408836238, now seen corresponding path program 1 times [2023-11-21 22:24:37,633 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2023-11-21 22:24:37,633 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1632355833] [2023-11-21 22:24:37,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-21 22:24:37,633 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-21 22:24:37,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:24:37,674 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-21 22:24:37,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-21 22:24:37,767 INFO L130 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2023-11-21 22:24:37,768 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-21 22:24:37,773 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONMEMORY_LEAK (19 of 20 remaining) [2023-11-21 22:24:37,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (18 of 20 remaining) [2023-11-21 22:24:37,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (17 of 20 remaining) [2023-11-21 22:24:37,775 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr2ASSERT_VIOLATIONMEMORY_DEREFERENCE (16 of 20 remaining) [2023-11-21 22:24:37,776 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr3ASSERT_VIOLATIONMEMORY_DEREFERENCE (15 of 20 remaining) [2023-11-21 22:24:37,776 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr4ASSERT_VIOLATIONMEMORY_DEREFERENCE (14 of 20 remaining) [2023-11-21 22:24:37,776 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr5ASSERT_VIOLATIONMEMORY_DEREFERENCE (13 of 20 remaining) [2023-11-21 22:24:37,776 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr6REQUIRES_VIOLATIONMEMORY_DEREFERENCE (12 of 20 remaining) [2023-11-21 22:24:37,776 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr7REQUIRES_VIOLATIONMEMORY_DEREFERENCE (11 of 20 remaining) [2023-11-21 22:24:37,776 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr8REQUIRES_VIOLATIONMEMORY_DEREFERENCE (10 of 20 remaining) [2023-11-21 22:24:37,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr9REQUIRES_VIOLATIONMEMORY_DEREFERENCE (9 of 20 remaining) [2023-11-21 22:24:37,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr10ASSERT_VIOLATIONMEMORY_FREE (8 of 20 remaining) [2023-11-21 22:24:37,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr11ASSERT_VIOLATIONMEMORY_FREE (7 of 20 remaining) [2023-11-21 22:24:37,777 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr12ASSERT_VIOLATIONMEMORY_FREE (6 of 20 remaining) [2023-11-21 22:24:37,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr13ASSERT_VIOLATIONMEMORY_FREE (5 of 20 remaining) [2023-11-21 22:24:37,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr14ASSERT_VIOLATIONMEMORY_FREE (4 of 20 remaining) [2023-11-21 22:24:37,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr15ASSERT_VIOLATIONMEMORY_FREE (3 of 20 remaining) [2023-11-21 22:24:37,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr16ASSERT_VIOLATIONMEMORY_FREE (2 of 20 remaining) [2023-11-21 22:24:37,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr17ASSERT_VIOLATIONMEMORY_FREE (1 of 20 remaining) [2023-11-21 22:24:37,778 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location parse_inputErr18ASSERT_VIOLATIONMEMORY_FREE (0 of 20 remaining) [2023-11-21 22:24:37,779 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2023-11-21 22:24:37,782 INFO L445 BasicCegarLoop]: Path program histogram: [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-21 22:24:37,785 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-21 22:24:37,838 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem3 [2023-11-21 22:24:37,840 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem3 [2023-11-21 22:24:37,842 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem3 [2023-11-21 22:24:37,842 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem3 [2023-11-21 22:24:37,843 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem3 [2023-11-21 22:24:37,846 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated [2023-11-21 22:24:37,855 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem3 [2023-11-21 22:24:37,855 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem3 [2023-11-21 22:24:37,860 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem3 [2023-11-21 22:24:37,861 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem3 [2023-11-21 22:24:37,861 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem3 [2023-11-21 22:24:37,861 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated [2023-11-21 22:24:37,863 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem3 [2023-11-21 22:24:37,863 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem3 [2023-11-21 22:24:37,863 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem3 [2023-11-21 22:24:37,864 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem3 [2023-11-21 22:24:37,864 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: unknown boogie variable #t~mem3 [2023-11-21 22:24:37,865 WARN L1572 BoogieBacktranslator]: Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated [2023-11-21 22:24:37,879 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.11 10:24:37 BoogieIcfgContainer [2023-11-21 22:24:37,879 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-21 22:24:37,879 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-21 22:24:37,880 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-21 22:24:37,880 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-21 22:24:37,880 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.11 10:23:59" (3/4) ... [2023-11-21 22:24:37,885 INFO L140 WitnessPrinter]: No result that supports witness generation found [2023-11-21 22:24:37,886 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-21 22:24:37,887 INFO L158 Benchmark]: Toolchain (without parser) took 39469.46ms. Allocated memory was 130.0MB in the beginning and 299.9MB in the end (delta: 169.9MB). Free memory was 98.2MB in the beginning and 241.6MB in the end (delta: -143.5MB). Peak memory consumption was 27.0MB. Max. memory is 16.1GB. [2023-11-21 22:24:37,887 INFO L158 Benchmark]: CDTParser took 0.50ms. Allocated memory is still 100.7MB. Free memory is still 54.0MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 22:24:37,887 INFO L158 Benchmark]: CACSL2BoogieTranslator took 676.00ms. Allocated memory is still 130.0MB. Free memory was 98.2MB in the beginning and 78.1MB in the end (delta: 20.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. [2023-11-21 22:24:37,888 INFO L158 Benchmark]: Boogie Procedure Inliner took 84.72ms. Allocated memory is still 130.0MB. Free memory was 78.1MB in the beginning and 75.7MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 22:24:37,889 INFO L158 Benchmark]: Boogie Preprocessor took 29.77ms. Allocated memory is still 130.0MB. Free memory was 75.7MB in the beginning and 73.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-21 22:24:37,890 INFO L158 Benchmark]: RCFGBuilder took 548.69ms. Allocated memory is still 130.0MB. Free memory was 73.9MB in the beginning and 54.1MB in the end (delta: 19.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. [2023-11-21 22:24:37,890 INFO L158 Benchmark]: TraceAbstraction took 38115.74ms. Allocated memory was 130.0MB in the beginning and 299.9MB in the end (delta: 169.9MB). Free memory was 53.5MB in the beginning and 241.6MB in the end (delta: -188.1MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 22:24:37,890 INFO L158 Benchmark]: Witness Printer took 6.76ms. Allocated memory is still 299.9MB. Free memory is still 241.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-21 22:24:37,899 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.50ms. Allocated memory is still 100.7MB. Free memory is still 54.0MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 676.00ms. Allocated memory is still 130.0MB. Free memory was 98.2MB in the beginning and 78.1MB in the end (delta: 20.0MB). Peak memory consumption was 18.9MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 84.72ms. Allocated memory is still 130.0MB. Free memory was 78.1MB in the beginning and 75.7MB in the end (delta: 2.5MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 29.77ms. Allocated memory is still 130.0MB. Free memory was 75.7MB in the beginning and 73.9MB in the end (delta: 1.7MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * RCFGBuilder took 548.69ms. Allocated memory is still 130.0MB. Free memory was 73.9MB in the beginning and 54.1MB in the end (delta: 19.8MB). Peak memory consumption was 21.0MB. Max. memory is 16.1GB. * TraceAbstraction took 38115.74ms. Allocated memory was 130.0MB in the beginning and 299.9MB in the end (delta: 169.9MB). Free memory was 53.5MB in the beginning and 241.6MB in the end (delta: -188.1MB). There was no memory consumed. Max. memory is 16.1GB. * Witness Printer took 6.76ms. Allocated memory is still 299.9MB. Free memory is still 241.6MB. There was no memory consumed. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem3 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem3 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem3 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem3 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem3 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem3 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem3 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem3 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem3 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem3 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem3 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem3 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem3 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem3 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: unknown boogie variable #t~mem3 - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: IdentifierExpression #t~mem5 could not be translated - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - UnprovableResult [Line: 721]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: overapproximation of strcmp at line 693, overapproximation of memtrack at line 721. Possible FailurePath: [L685] int state = STATE_1; [L686] char *global = 0; [L687-L690] const struct command commands[] = { {"c1",c1,STATE_1}, {"c2",c2,STATE_2} }; [L722] CALL parse_input("c1") VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, state=0] [L692] int i = 0; VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L692] COND TRUE i < 2 VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR commands[i].name VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)={0:0}, \old(state)=0, commands={6:0}, global={0:0}, i=0, input={3:0}, input={3:0}, state=0] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) [L706] COND FALSE !(\read(*global)) [L708] global = x [L709] state = STATE_2 [L695] RET commands[i].function() [L722] RET parse_input("c1") VAL [commands={6:0}, global={-3:0}, state=1] [L723] CALL parse_input("c1") VAL [\old(global)={-3:0}, \old(state)=1, commands={6:0}, global={-3:0}, state=1] [L692] int i = 0; VAL [\old(global)={-3:0}, \old(state)=1, commands={6:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)={-3:0}, \old(state)=1, commands={6:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)={-3:0}, \old(state)=1, commands={6:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={-3:0}, \old(state)=1, commands={6:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={-3:0}, \old(state)=1, commands={6:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={-3:0}, \old(state)=1, commands={6:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={-3:0}, \old(state)=1, commands={6:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)={-3:0}, \old(state)=1, commands={6:0}, global={-3:0}, i=0, input={4:0}, input={4:0}, state=1] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) [L706] COND TRUE \read(*global) [L708] global = x [L709] state = STATE_2 [L695] RET commands[i].function() [L723] RET parse_input("c1") VAL [commands={6:0}, global={7:0}, state=1] [L724] CALL parse_input("c2") VAL [\old(global)={7:0}, \old(state)=1, commands={6:0}, global={7:0}, state=1] [L692] int i = 0; VAL [\old(global)={7:0}, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L692] COND TRUE i < 2 VAL [\old(global)={7:0}, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR commands[i].name VAL [\old(global)={7:0}, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={7:0}, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={7:0}, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={7:0}, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] EXPR strcmp(commands[i].name,input) VAL [\old(global)={7:0}, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L693] COND TRUE strcmp(commands[i].name,input) == 0 [L694] EXPR commands[i].state_needed VAL [\old(global)={7:0}, \old(state)=1, commands={6:0}, global={7:0}, i=0, input={5:0}, input={5:0}, state=1] [L694] COND TRUE state >= commands[i].state_needed [L695] EXPR commands[i].function [L695] CALL commands[i].function() [L702] char *x = (char *)malloc(sizeof(char)); [L703] COND FALSE !(!x) [L706] COND TRUE \read(*global) [L708] global = x [L709] state = STATE_2 [L695] RET commands[i].function() [L724] RET parse_input("c2") VAL [commands={6:0}, global={-6:0}, state=1] [L725] return 0; VAL [\result=0, commands={6:0}, global={-6:0}, state=1] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 693]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 714]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 717]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 718]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 2 procedures, 54 locations, 20 error locations. Started 1 CEGAR loops. OverallTime: 37.9s, OverallIterations: 28, TraceHistogramMax: 4, PathProgramHistogramMax: 1, EmptinessCheckTime: 0.0s, AutomataDifference: 14.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 6757 SdHoareTripleChecker+Valid, 6.9s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 6754 mSDsluCounter, 4326 SdHoareTripleChecker+Invalid, 5.9s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 276 IncrementalHoareTripleChecker+Unchecked, 3266 mSDsCounter, 761 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 6754 IncrementalHoareTripleChecker+Invalid, 7791 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 761 mSolverCounterUnsat, 1060 mSDtfsCounter, 6754 mSolverCounterSat, 0.2s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 1172 GetRequests, 684 SyntacticMatches, 6 SemanticMatches, 482 ConstructedPredicates, 2 IntricatePredicates, 0 DeprecatedPredicates, 3293 ImplicationChecksByTransitivity, 10.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=415occurred in iteration=20, InterpolantAutomatonStates: 291, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 27 MinimizatonAttempts, 1272 StatesRemovedByMinimization, 25 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.2s SsaConstructionTime, 0.9s SatisfiabilityAnalysisTime, 16.7s InterpolantComputationTime, 1260 NumberOfCodeBlocks, 1260 NumberOfCodeBlocksAsserted, 46 NumberOfCheckSat, 1320 ConstructedInterpolants, 74 QuantifiedInterpolants, 17914 SizeOfPredicates, 70 NumberOfNonLiveVariables, 4099 ConjunctsInSsa, 325 ConjunctsInUnsatCore, 51 InterpolantComputations, 13 PerfectInterpolantSequences, 247/669 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: unable to determine feasibility of some traces [2023-11-21 22:24:37,940 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request... --- End real Ultimate output --- Execution finished normally Using bit-precise analysis Retrying with bit-precise analysis ### Bit-precise run ### Calling Ultimate with: /usr/lib/jvm/java-1.11.0-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/config/AutomizerMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx --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 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e --- Real Ultimate output --- This is Ultimate 0.2.3-dev-527bcce [2023-11-21 22:24:40,534 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-21 22:24:40,663 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/config/svcomp-DerefFreeMemtrack-32bit-Automizer_Bitvector.epf [2023-11-21 22:24:40,672 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-21 22:24:40,673 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-21 22:24:40,715 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-21 22:24:40,716 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-21 22:24:40,717 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-21 22:24:40,718 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-21 22:24:40,723 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-21 22:24:40,724 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-21 22:24:40,724 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-21 22:24:40,725 INFO L153 SettingsManager]: * Use SBE=true [2023-11-21 22:24:40,727 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-21 22:24:40,727 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-21 22:24:40,728 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-21 22:24:40,728 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-21 22:24:40,729 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-21 22:24:40,729 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-21 22:24:40,730 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-21 22:24:40,731 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-21 22:24:40,731 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-21 22:24:40,732 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-21 22:24:40,732 INFO L153 SettingsManager]: * Use bitvectors instead of ints=true [2023-11-21 22:24:40,733 INFO L153 SettingsManager]: * Memory model=HoenickeLindenmann_4ByteResolution [2023-11-21 22:24:40,734 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-21 22:24:40,734 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-21 22:24:40,735 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-21 22:24:40,735 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-21 22:24:40,736 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2023-11-21 22:24:40,737 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-21 22:24:40,738 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-21 22:24:40,738 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-21 22:24:40,738 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-21 22:24:40,739 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-21 22:24:40,739 INFO L153 SettingsManager]: * Trace refinement strategy=WOLF [2023-11-21 22:24:40,739 INFO L153 SettingsManager]: * Command for external solver=cvc4 --incremental --print-success --lang smt [2023-11-21 22:24:40,740 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-21 22:24:40,740 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2023-11-21 22:24:40,741 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2023-11-21 22:24:40,741 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-21 22:24:40,742 INFO L153 SettingsManager]: * Logic for external solver=AUFBV [2023-11-21 22:24:40,742 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_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 6826aeecba49275836b6b398765a757158a4e84d2c6569399d77f2320562875e [2023-11-21 22:24:41,216 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-21 22:24:41,253 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-21 22:24:41,256 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-21 22:24:41,257 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-21 22:24:41,258 INFO L274 PluginConnector]: CDTParser initialized [2023-11-21 22:24:41,259 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_c627d0a5-a06d-455c-8c01-4c88debc3837/bin/uautomizer-verify-bycVGegfSx/../../sv-benchmarks/c/memsafety-bftpd/bftpd_3.i