./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/termination-dietlibc/strrchr_short.i --full-output --architecture 64bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version 30e01a73 Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/termination-dietlibc/strrchr_short.i -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire --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 Taipan --witnessprinter.graph.data.architecture 64bit --witnessprinter.graph.data.programhash 5714449da9967bbd2918d4305e52dc9c1161024d975984886640d613abe881d1 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 21:19:53,897 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 21:19:53,974 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-DerefFreeMemtrack-64bit-Taipan_Default.epf [2023-11-23 21:19:53,979 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 21:19:53,980 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 21:19:54,007 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 21:19:54,008 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 21:19:54,008 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 21:19:54,009 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 21:19:54,010 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 21:19:54,010 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 21:19:54,011 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 21:19:54,011 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 21:19:54,012 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 21:19:54,012 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 21:19:54,013 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 21:19:54,013 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 21:19:54,014 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 21:19:54,014 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 21:19:54,015 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 21:19:54,016 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 21:19:54,023 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 21:19:54,024 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-23 21:19:54,024 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-23 21:19:54,025 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 21:19:54,025 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 21:19:54,026 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 21:19:54,027 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-23 21:19:54,027 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-23 21:19:54,027 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-23 21:19:54,028 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 21:19:54,029 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-23 21:19:54,030 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-23 21:19:54,030 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 21:19:54,030 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 21:19:54,030 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 21:19:54,031 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 21:19:54,031 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:19:54,031 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 21:19:54,031 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 21:19:54,032 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 21:19:54,032 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 21:19:54,032 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 21:19:54,033 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 21:19:54,033 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 21:19:54,033 INFO L153 SettingsManager]: * Abstract interpretation Mode=USE_PREDICATES 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_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 64bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5714449da9967bbd2918d4305e52dc9c1161024d975984886640d613abe881d1 [2023-11-23 21:19:54,389 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 21:19:54,431 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 21:19:54,434 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 21:19:54,436 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 21:19:54,436 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 21:19:54,439 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/termination-dietlibc/strrchr_short.i [2023-11-23 21:19:57,722 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 21:19:57,987 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 21:19:57,988 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/sv-benchmarks/c/termination-dietlibc/strrchr_short.i [2023-11-23 21:19:58,003 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/data/5b91c1a3d/5df71a88c2d044f3993eefbab14bb075/FLAGc01f3e325 [2023-11-23 21:19:58,018 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/data/5b91c1a3d/5df71a88c2d044f3993eefbab14bb075 [2023-11-23 21:19:58,021 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 21:19:58,023 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 21:19:58,025 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 21:19:58,025 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 21:19:58,032 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 21:19:58,032 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:58" (1/1) ... [2023-11-23 21:19:58,034 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6d1f5736 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:58, skipping insertion in model container [2023-11-23 21:19:58,034 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 09:19:58" (1/1) ... [2023-11-23 21:19:58,105 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 21:19:58,434 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:19:58,447 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 21:19:58,487 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 21:19:58,518 INFO L206 MainTranslator]: Completed translation [2023-11-23 21:19:58,518 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:58 WrapperNode [2023-11-23 21:19:58,519 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 21:19:58,520 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 21:19:58,520 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 21:19:58,521 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 21:19:58,528 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:58" (1/1) ... [2023-11-23 21:19:58,541 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:58" (1/1) ... [2023-11-23 21:19:58,563 INFO L138 Inliner]: procedures = 113, calls = 9, calls flagged for inlining = 3, calls inlined = 3, statements flattened = 51 [2023-11-23 21:19:58,563 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 21:19:58,564 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 21:19:58,564 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 21:19:58,565 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 21:19:58,574 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:58" (1/1) ... [2023-11-23 21:19:58,574 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:58" (1/1) ... [2023-11-23 21:19:58,577 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:58" (1/1) ... [2023-11-23 21:19:58,578 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:58" (1/1) ... [2023-11-23 21:19:58,583 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:58" (1/1) ... [2023-11-23 21:19:58,587 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:58" (1/1) ... [2023-11-23 21:19:58,588 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:58" (1/1) ... [2023-11-23 21:19:58,590 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:58" (1/1) ... [2023-11-23 21:19:58,592 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 21:19:58,593 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 21:19:58,593 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 21:19:58,593 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 21:19:58,594 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:58" (1/1) ... [2023-11-23 21:19:58,600 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 21:19:58,611 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:19:58,624 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 21:19:58,645 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 21:19:58,663 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-23 21:19:58,664 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-23 21:19:58,664 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-23 21:19:58,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-23 21:19:58,664 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 21:19:58,665 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 21:19:58,752 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 21:19:58,754 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 21:19:58,953 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 21:19:59,023 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 21:19:59,024 INFO L309 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-23 21:19:59,028 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:59 BoogieIcfgContainer [2023-11-23 21:19:59,029 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 21:19:59,032 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 21:19:59,042 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 21:19:59,045 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 21:19:59,046 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 09:19:58" (1/3) ... [2023-11-23 21:19:59,047 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28317f89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:59, skipping insertion in model container [2023-11-23 21:19:59,047 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 09:19:58" (2/3) ... [2023-11-23 21:19:59,048 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@28317f89 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 09:19:59, skipping insertion in model container [2023-11-23 21:19:59,048 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:59" (3/3) ... [2023-11-23 21:19:59,049 INFO L112 eAbstractionObserver]: Analyzing ICFG strrchr_short.i [2023-11-23 21:19:59,073 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 21:19:59,073 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 7 error locations. [2023-11-23 21:19:59,121 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 21:19:59,129 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=FINITE_AUTOMATA, 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;@5824c90c, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 21:19:59,130 INFO L358 AbstractCegarLoop]: Starting to check reachability of 7 error locations. [2023-11-23 21:19:59,134 INFO L276 IsEmpty]: Start isEmpty. Operand has 17 states, 9 states have (on average 2.111111111111111) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:59,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 21:19:59,140 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:59,141 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 21:19:59,142 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-23 21:19:59,148 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:59,148 INFO L85 PathProgramCache]: Analyzing trace with hash 77080, now seen corresponding path program 1 times [2023-11-23 21:19:59,160 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:59,160 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1037488232] [2023-11-23 21:19:59,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:59,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:59,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:59,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:19:59,334 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:59,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1037488232] [2023-11-23 21:19:59,336 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1037488232] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:59,336 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:59,337 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-23 21:19:59,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2086689590] [2023-11-23 21:19:59,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:59,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:59,346 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:59,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:59,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:19:59,386 INFO L87 Difference]: Start difference. First operand has 17 states, 9 states have (on average 2.111111111111111) internal successors, (19), 16 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:59,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:59,473 INFO L93 Difference]: Finished difference Result 18 states and 19 transitions. [2023-11-23 21:19:59,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:19:59,481 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-23 21:19:59,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:59,490 INFO L225 Difference]: With dead ends: 18 [2023-11-23 21:19:59,490 INFO L226 Difference]: Without dead ends: 16 [2023-11-23 21:19:59,492 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 1 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:19:59,496 INFO L413 NwaCegarLoop]: 13 mSDtfsCounter, 1 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:59,498 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 19 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:19:59,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-23 21:19:59,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 16. [2023-11-23 21:19:59,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 16 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 15 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:59,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 16 states to 16 states and 16 transitions. [2023-11-23 21:19:59,528 INFO L78 Accepts]: Start accepts. Automaton has 16 states and 16 transitions. Word has length 3 [2023-11-23 21:19:59,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:59,529 INFO L495 AbstractCegarLoop]: Abstraction has 16 states and 16 transitions. [2023-11-23 21:19:59,529 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 2 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:59,529 INFO L276 IsEmpty]: Start isEmpty. Operand 16 states and 16 transitions. [2023-11-23 21:19:59,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 21:19:59,530 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:59,530 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 21:19:59,530 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 21:19:59,531 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-23 21:19:59,532 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:59,532 INFO L85 PathProgramCache]: Analyzing trace with hash 77106, now seen corresponding path program 1 times [2023-11-23 21:19:59,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:59,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907229521] [2023-11-23 21:19:59,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:59,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:59,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:19:59,637 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:19:59,637 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:19:59,637 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907229521] [2023-11-23 21:19:59,638 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1907229521] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:19:59,638 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:19:59,638 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:19:59,638 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106566197] [2023-11-23 21:19:59,638 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:19:59,639 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:19:59,640 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:19:59,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:19:59,641 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:19:59,641 INFO L87 Difference]: Start difference. First operand 16 states and 16 transitions. Second operand has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:59,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:19:59,665 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2023-11-23 21:19:59,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:19:59,666 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-23 21:19:59,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:19:59,666 INFO L225 Difference]: With dead ends: 15 [2023-11-23 21:19:59,666 INFO L226 Difference]: Without dead ends: 15 [2023-11-23 21:19:59,667 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 [2023-11-23 21:19:59,669 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 11 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 11 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 11 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:19:59,670 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 7 Invalid, 11 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 11 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:19:59,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 15 states. [2023-11-23 21:19:59,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 15 to 15. [2023-11-23 21:19:59,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:59,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-11-23 21:19:59,675 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 3 [2023-11-23 21:19:59,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:19:59,675 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-11-23 21:19:59,675 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 1.5) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:19:59,676 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-11-23 21:19:59,676 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-23 21:19:59,676 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:19:59,677 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-23 21:19:59,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 21:19:59,677 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-23 21:19:59,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:19:59,678 INFO L85 PathProgramCache]: Analyzing trace with hash 77107, now seen corresponding path program 1 times [2023-11-23 21:19:59,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:19:59,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [905708634] [2023-11-23 21:19:59,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:19:59,680 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:19:59,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:00,077 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:00,077 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:00,078 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [905708634] [2023-11-23 21:20:00,078 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [905708634] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:00,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:00,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:20:00,079 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937126572] [2023-11-23 21:20:00,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:00,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:20:00,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:00,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:20:00,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:20:00,082 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:00,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:00,109 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2023-11-23 21:20:00,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:20:00,110 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 3 [2023-11-23 21:20:00,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:00,111 INFO L225 Difference]: With dead ends: 14 [2023-11-23 21:20:00,111 INFO L226 Difference]: Without dead ends: 14 [2023-11-23 21:20:00,112 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 [2023-11-23 21:20:00,114 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 12 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 7 SdHoareTripleChecker+Invalid, 8 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:00,115 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 7 Invalid, 8 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:20:00,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 14 states. [2023-11-23 21:20:00,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 14 to 14. [2023-11-23 21:20:00,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:00,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2023-11-23 21:20:00,119 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 3 [2023-11-23 21:20:00,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:00,120 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2023-11-23 21:20:00,120 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.0) internal successors, (3), 3 states have internal predecessors, (3), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:00,121 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2023-11-23 21:20:00,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:20:00,121 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:00,121 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 21:20:00,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 21:20:00,122 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-23 21:20:00,123 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:00,123 INFO L85 PathProgramCache]: Analyzing trace with hash 74136955, now seen corresponding path program 1 times [2023-11-23 21:20:00,124 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:00,124 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303186950] [2023-11-23 21:20:00,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:00,125 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:00,145 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:00,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:00,211 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:00,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303186950] [2023-11-23 21:20:00,212 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1303186950] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:00,212 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:00,212 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:20:00,213 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1740196687] [2023-11-23 21:20:00,213 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:00,214 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 21:20:00,214 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:00,215 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 21:20:00,215 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 21:20:00,216 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:00,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:00,245 INFO L93 Difference]: Finished difference Result 12 states and 12 transitions. [2023-11-23 21:20:00,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 21:20:00,246 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 21:20:00,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:00,246 INFO L225 Difference]: With dead ends: 12 [2023-11-23 21:20:00,247 INFO L226 Difference]: Without dead ends: 12 [2023-11-23 21:20:00,247 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 [2023-11-23 21:20:00,250 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 5 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 4 SdHoareTripleChecker+Invalid, 14 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:00,251 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 4 Invalid, 14 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:20:00,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-23 21:20:00,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-23 21:20:00,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 9 states have (on average 1.3333333333333333) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:00,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-11-23 21:20:00,255 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 5 [2023-11-23 21:20:00,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:00,256 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-11-23 21:20:00,256 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 3 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:00,257 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-11-23 21:20:00,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-23 21:20:00,258 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:00,258 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1] [2023-11-23 21:20:00,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 21:20:00,259 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-23 21:20:00,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:00,260 INFO L85 PathProgramCache]: Analyzing trace with hash 74136956, now seen corresponding path program 1 times [2023-11-23 21:20:00,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:00,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [269448939] [2023-11-23 21:20:00,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:00,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:00,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:00,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:00,599 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:00,599 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [269448939] [2023-11-23 21:20:00,599 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [269448939] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:00,600 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:00,600 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 21:20:00,600 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28133672] [2023-11-23 21:20:00,601 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:00,601 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:20:00,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:00,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:20:00,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:20:00,603 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:00,658 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:00,659 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2023-11-23 21:20:00,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:20:00,660 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-23 21:20:00,660 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:00,661 INFO L225 Difference]: With dead ends: 17 [2023-11-23 21:20:00,661 INFO L226 Difference]: Without dead ends: 17 [2023-11-23 21:20:00,662 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-23 21:20:00,663 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 19 mSDsluCounter, 3 mSDsCounter, 0 mSdLazyCounter, 14 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 19 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 15 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 14 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:00,664 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [19 Valid, 10 Invalid, 15 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 14 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:20:00,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-23 21:20:00,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 15. [2023-11-23 21:20:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 12 states have (on average 1.25) internal successors, (15), 14 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:00,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 15 transitions. [2023-11-23 21:20:00,672 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 15 transitions. Word has length 5 [2023-11-23 21:20:00,672 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:00,672 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 15 transitions. [2023-11-23 21:20:00,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 1.6666666666666667) internal successors, (5), 4 states have internal predecessors, (5), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:00,673 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 15 transitions. [2023-11-23 21:20:00,673 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:20:00,674 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:00,674 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:00,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 21:20:00,674 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-23 21:20:00,675 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:00,677 INFO L85 PathProgramCache]: Analyzing trace with hash 992527203, now seen corresponding path program 1 times [2023-11-23 21:20:00,677 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:00,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2067938524] [2023-11-23 21:20:00,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:00,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:00,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:00,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:00,935 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:00,936 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2067938524] [2023-11-23 21:20:00,936 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2067938524] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 21:20:00,936 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 21:20:00,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-23 21:20:00,937 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198645054] [2023-11-23 21:20:00,937 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 21:20:00,937 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-23 21:20:00,938 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:00,939 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-23 21:20:00,939 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:20:00,939 INFO L87 Difference]: Start difference. First operand 15 states and 15 transitions. Second operand has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:00,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:00,960 INFO L93 Difference]: Finished difference Result 14 states and 14 transitions. [2023-11-23 21:20:00,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-23 21:20:00,961 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 21:20:00,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:00,962 INFO L225 Difference]: With dead ends: 14 [2023-11-23 21:20:00,962 INFO L226 Difference]: Without dead ends: 12 [2023-11-23 21:20:00,963 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-23 21:20:00,964 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 3 mSDsluCounter, 5 mSDsCounter, 0 mSdLazyCounter, 12 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 10 SdHoareTripleChecker+Invalid, 12 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 12 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:00,965 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 10 Invalid, 12 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 12 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 21:20:00,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12 states. [2023-11-23 21:20:00,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12 to 12. [2023-11-23 21:20:00,968 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 12 states, 10 states have (on average 1.2) internal successors, (12), 11 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:00,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 12 transitions. [2023-11-23 21:20:00,968 INFO L78 Accepts]: Start accepts. Automaton has 12 states and 12 transitions. Word has length 9 [2023-11-23 21:20:00,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:00,969 INFO L495 AbstractCegarLoop]: Abstraction has 12 states and 12 transitions. [2023-11-23 21:20:00,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 3.0) internal successors, (9), 3 states have internal predecessors, (9), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:00,970 INFO L276 IsEmpty]: Start isEmpty. Operand 12 states and 12 transitions. [2023-11-23 21:20:00,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2023-11-23 21:20:00,970 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:00,970 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:00,971 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 21:20:00,971 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-23 21:20:00,972 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:00,972 INFO L85 PathProgramCache]: Analyzing trace with hash 992528358, now seen corresponding path program 1 times [2023-11-23 21:20:00,972 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:00,972 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1233754919] [2023-11-23 21:20:00,973 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:00,973 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:00,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:01,306 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:01,307 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:01,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1233754919] [2023-11-23 21:20:01,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1233754919] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:20:01,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134140119] [2023-11-23 21:20:01,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:01,308 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:01,308 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:01,312 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:20:01,331 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-23 21:20:01,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:01,402 INFO L262 TraceCheckSpWp]: Trace formula consists of 72 conjuncts, 21 conjunts are in the unsatisfiable core [2023-11-23 21:20:01,409 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:20:01,537 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 14 treesize of output 10 [2023-11-23 21:20:01,778 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:20:01,778 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 18 treesize of output 19 [2023-11-23 21:20:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:01,902 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:20:02,152 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 13 treesize of output 11 [2023-11-23 21:20:02,161 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 15 treesize of output 11 [2023-11-23 21:20:02,175 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 22 treesize of output 20 [2023-11-23 21:20:02,195 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:02,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2134140119] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:20:02,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1691337927] [2023-11-23 21:20:02,219 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-23 21:20:02,219 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:20:02,225 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:20:02,231 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:20:02,232 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:20:03,013 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:20:03,434 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '279#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_strrchr_#in~t#1.base|) (<= 2 |ULTIMATE.start_strrchr_~t#1.base|) (<= 2 |ULTIMATE.start_main_~in~0#1.base|) (<= |ULTIMATE.start_strrchr_#in~c#1| 2147483647) (= |ULTIMATE.start_main_~in~0#1.offset| 0) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= (select |#length| |ULTIMATE.start_strrchr_~t#1.base|) |ULTIMATE.start_strrchr_~t#1.offset|) (<= 0 (+ |ULTIMATE.start_main_~the_int~0#1| 2147483648)) (<= 2 |ULTIMATE.start_main_#t~malloc6#1.base|) (= |ULTIMATE.start_main_#t~malloc6#1.offset| 0) (<= 0 |ULTIMATE.start_strrchr_~t#1.offset|) (= |ULTIMATE.start_strrchr_#in~t#1.offset| 0) (<= |ULTIMATE.start_strrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~the_int~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_strrchr_#in~c#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_strrchr_~c#1| 2147483648)) (<= 1 |ULTIMATE.start_main_~in_len~0#1|))' at error location [2023-11-23 21:20:03,434 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:20:03,435 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:20:03,435 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 6, 6] total 13 [2023-11-23 21:20:03,435 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834104482] [2023-11-23 21:20:03,435 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:20:03,436 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2023-11-23 21:20:03,436 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:03,437 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2023-11-23 21:20:03,438 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=286, Unknown=0, NotChecked=0, Total=342 [2023-11-23 21:20:03,439 INFO L87 Difference]: Start difference. First operand 12 states and 12 transitions. Second operand has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:03,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:03,763 INFO L93 Difference]: Finished difference Result 16 states and 16 transitions. [2023-11-23 21:20:03,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2023-11-23 21:20:03,763 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 9 [2023-11-23 21:20:03,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:03,764 INFO L225 Difference]: With dead ends: 16 [2023-11-23 21:20:03,764 INFO L226 Difference]: Without dead ends: 16 [2023-11-23 21:20:03,765 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=94, Invalid=412, Unknown=0, NotChecked=0, Total=506 [2023-11-23 21:20:03,766 INFO L413 NwaCegarLoop]: 3 mSDtfsCounter, 37 mSDsluCounter, 11 mSDsCounter, 0 mSdLazyCounter, 65 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 37 SdHoareTripleChecker+Valid, 14 SdHoareTripleChecker+Invalid, 69 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 65 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:03,767 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [37 Valid, 14 Invalid, 69 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 65 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:20:03,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-23 21:20:03,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 14. [2023-11-23 21:20:03,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 14 states, 13 states have (on average 1.0769230769230769) internal successors, (14), 13 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:03,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 14 transitions. [2023-11-23 21:20:03,770 INFO L78 Accepts]: Start accepts. Automaton has 14 states and 14 transitions. Word has length 9 [2023-11-23 21:20:03,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:03,771 INFO L495 AbstractCegarLoop]: Abstraction has 14 states and 14 transitions. [2023-11-23 21:20:03,771 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 1.6923076923076923) internal successors, (22), 14 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:03,771 INFO L276 IsEmpty]: Start isEmpty. Operand 14 states and 14 transitions. [2023-11-23 21:20:03,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2023-11-23 21:20:03,772 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 21:20:03,772 INFO L195 NwaCegarLoop]: trace histogram [3, 2, 2, 2, 1, 1, 1, 1] [2023-11-23 21:20:03,800 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-23 21:20:03,994 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:03,994 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 4 more)] === [2023-11-23 21:20:03,994 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 21:20:03,995 INFO L85 PathProgramCache]: Analyzing trace with hash 1776749904, now seen corresponding path program 2 times [2023-11-23 21:20:03,995 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 21:20:03,995 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [838798822] [2023-11-23 21:20:03,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 21:20:03,995 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 21:20:04,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 21:20:04,664 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 21:20:04,664 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 21:20:04,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [838798822] [2023-11-23 21:20:04,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [838798822] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-23 21:20:04,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [315404490] [2023-11-23 21:20:04,665 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-23 21:20:04,666 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:04,666 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 21:20:04,667 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-23 21:20:04,684 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-23 21:20:04,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2023-11-23 21:20:04,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-23 21:20:04,748 INFO L262 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 29 conjunts are in the unsatisfiable core [2023-11-23 21:20:04,752 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-23 21:20:04,768 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 7 [2023-11-23 21:20:04,818 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 18 treesize of output 14 [2023-11-23 21:20:05,074 INFO L349 Elim1Store]: treesize reduction 0, result has 100.0 percent of original size [2023-11-23 21:20:05,075 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 2 select indices, 2 select index equivalence classes, 0 disjoint index pairs (out of 1 index pairs), introduced 2 new quantified variables, introduced 1 case distinctions, treesize of input 22 treesize of output 23 [2023-11-23 21:20:05,185 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 1 proven. 5 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:20:05,186 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-23 21:20:05,393 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 2, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 17 treesize of output 15 [2023-11-23 21:20:05,403 INFO L378 Elim1Store]: Elim1 eliminated variable of array dimension 1, 0 stores, 1 select indices, 1 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 1 new quantified variables, introduced 0 case distinctions, treesize of input 26 treesize of output 20 [2023-11-23 21:20:05,462 INFO L134 CoverageAnalysis]: Checked inductivity of 8 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-23 21:20:05,463 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [315404490] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-23 21:20:05,463 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [2114970280] [2023-11-23 21:20:05,468 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-23 21:20:05,468 INFO L166 IcfgInterpreter]: Building call graph [2023-11-23 21:20:05,468 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-23 21:20:05,469 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-23 21:20:05,471 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-23 21:20:06,013 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-23 21:20:06,491 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '412#(and (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_strrchr_#in~t#1.base|) (<= 2 |ULTIMATE.start_strrchr_~t#1.base|) (<= 2 |ULTIMATE.start_main_~in~0#1.base|) (<= |ULTIMATE.start_strrchr_#in~c#1| 2147483647) (= |ULTIMATE.start_main_~in~0#1.offset| 0) (<= |ULTIMATE.start_main_~in_len~0#1| 2147483647) (<= (select |#length| |ULTIMATE.start_strrchr_~t#1.base|) |ULTIMATE.start_strrchr_~t#1.offset|) (<= 0 (+ |ULTIMATE.start_main_~the_int~0#1| 2147483648)) (<= 2 |ULTIMATE.start_main_#t~malloc6#1.base|) (= |ULTIMATE.start_main_#t~malloc6#1.offset| 0) (<= 0 |ULTIMATE.start_strrchr_~t#1.offset|) (= |ULTIMATE.start_strrchr_#in~t#1.offset| 0) (<= |ULTIMATE.start_strrchr_~c#1| 2147483647) (<= |ULTIMATE.start_main_~the_int~0#1| 2147483647) (<= 0 (+ |ULTIMATE.start_strrchr_#in~c#1| 2147483648)) (<= 0 (+ |ULTIMATE.start_strrchr_~c#1| 2147483648)) (<= 1 |ULTIMATE.start_main_~in_len~0#1|))' at error location [2023-11-23 21:20:06,491 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-23 21:20:06,492 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-23 21:20:06,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 6, 6] total 17 [2023-11-23 21:20:06,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503294310] [2023-11-23 21:20:06,492 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-23 21:20:06,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 21:20:06,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 21:20:06,494 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 21:20:06,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=442, Unknown=0, NotChecked=0, Total=506 [2023-11-23 21:20:06,495 INFO L87 Difference]: Start difference. First operand 14 states and 14 transitions. Second operand has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:06,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 21:20:06,984 INFO L93 Difference]: Finished difference Result 15 states and 15 transitions. [2023-11-23 21:20:06,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2023-11-23 21:20:06,985 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2023-11-23 21:20:06,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 21:20:06,985 INFO L225 Difference]: With dead ends: 15 [2023-11-23 21:20:06,985 INFO L226 Difference]: Without dead ends: 0 [2023-11-23 21:20:06,986 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=154, Invalid=658, Unknown=0, NotChecked=0, Total=812 [2023-11-23 21:20:06,987 INFO L413 NwaCegarLoop]: 4 mSDtfsCounter, 29 mSDsluCounter, 15 mSDsCounter, 0 mSdLazyCounter, 75 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 29 SdHoareTripleChecker+Valid, 19 SdHoareTripleChecker+Invalid, 81 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 75 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-23 21:20:06,987 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [29 Valid, 19 Invalid, 81 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 75 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-23 21:20:06,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2023-11-23 21:20:06,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2023-11-23 21:20:06,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:06,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2023-11-23 21:20:06,989 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 13 [2023-11-23 21:20:06,989 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 21:20:06,989 INFO L495 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2023-11-23 21:20:06,989 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 2.0588235294117645) internal successors, (35), 18 states have internal predecessors, (35), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 21:20:06,989 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2023-11-23 21:20:06,990 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2023-11-23 21:20:06,992 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 7 remaining) [2023-11-23 21:20:06,993 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 7 remaining) [2023-11-23 21:20:06,993 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 7 remaining) [2023-11-23 21:20:06,993 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 7 remaining) [2023-11-23 21:20:06,994 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr4REQUIRES_VIOLATIONMEMORY_DEREFERENCE (2 of 7 remaining) [2023-11-23 21:20:06,994 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr5REQUIRES_VIOLATIONMEMORY_DEREFERENCE (1 of 7 remaining) [2023-11-23 21:20:06,994 INFO L805 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_LEAK (0 of 7 remaining) [2023-11-23 21:20:07,017 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2023-11-23 21:20:07,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-23 21:20:07,210 INFO L445 BasicCegarLoop]: Path program histogram: [2, 1, 1, 1, 1, 1, 1] [2023-11-23 21:20:07,214 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-23 21:20:07,219 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 23.11 09:20:07 BoogieIcfgContainer [2023-11-23 21:20:07,220 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-23 21:20:07,221 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-23 21:20:07,222 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-23 21:20:07,222 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-23 21:20:07,222 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 09:19:59" (3/4) ... [2023-11-23 21:20:07,225 INFO L137 WitnessPrinter]: Generating witness for correct program [2023-11-23 21:20:07,238 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 15 nodes and edges [2023-11-23 21:20:07,239 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 6 nodes and edges [2023-11-23 21:20:07,239 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2023-11-23 21:20:07,239 INFO L943 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2023-11-23 21:20:07,336 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/witness.graphml [2023-11-23 21:20:07,337 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/witness.yml [2023-11-23 21:20:07,337 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-23 21:20:07,337 INFO L158 Benchmark]: Toolchain (without parser) took 9314.59ms. Allocated memory was 144.7MB in the beginning and 209.7MB in the end (delta: 65.0MB). Free memory was 98.6MB in the beginning and 122.2MB in the end (delta: -23.6MB). Peak memory consumption was 43.4MB. Max. memory is 16.1GB. [2023-11-23 21:20:07,338 INFO L158 Benchmark]: CDTParser took 1.53ms. Allocated memory is still 109.1MB. Free memory is still 58.3MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:20:07,338 INFO L158 Benchmark]: CACSL2BoogieTranslator took 494.69ms. Allocated memory is still 144.7MB. Free memory was 98.2MB in the beginning and 82.3MB in the end (delta: 15.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. [2023-11-23 21:20:07,339 INFO L158 Benchmark]: Boogie Procedure Inliner took 43.69ms. Allocated memory is still 144.7MB. Free memory was 82.3MB in the beginning and 80.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-23 21:20:07,339 INFO L158 Benchmark]: Boogie Preprocessor took 28.06ms. Allocated memory is still 144.7MB. Free memory was 80.2MB in the beginning and 78.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-23 21:20:07,340 INFO L158 Benchmark]: RCFGBuilder took 435.88ms. Allocated memory is still 144.7MB. Free memory was 78.8MB in the beginning and 115.9MB in the end (delta: -37.2MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. [2023-11-23 21:20:07,340 INFO L158 Benchmark]: TraceAbstraction took 8188.25ms. Allocated memory was 144.7MB in the beginning and 209.7MB in the end (delta: 65.0MB). Free memory was 115.1MB in the beginning and 127.1MB in the end (delta: -12.0MB). Peak memory consumption was 54.4MB. Max. memory is 16.1GB. [2023-11-23 21:20:07,341 INFO L158 Benchmark]: Witness Printer took 115.57ms. Allocated memory is still 209.7MB. Free memory was 127.1MB in the beginning and 122.2MB in the end (delta: 5.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. [2023-11-23 21:20:07,347 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.53ms. Allocated memory is still 109.1MB. Free memory is still 58.3MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 494.69ms. Allocated memory is still 144.7MB. Free memory was 98.2MB in the beginning and 82.3MB in the end (delta: 15.8MB). Peak memory consumption was 16.8MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 43.69ms. Allocated memory is still 144.7MB. Free memory was 82.3MB in the beginning and 80.2MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Boogie Preprocessor took 28.06ms. Allocated memory is still 144.7MB. Free memory was 80.2MB in the beginning and 78.8MB in the end (delta: 1.5MB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 435.88ms. Allocated memory is still 144.7MB. Free memory was 78.8MB in the beginning and 115.9MB in the end (delta: -37.2MB). Peak memory consumption was 18.5MB. Max. memory is 16.1GB. * TraceAbstraction took 8188.25ms. Allocated memory was 144.7MB in the beginning and 209.7MB in the end (delta: 65.0MB). Free memory was 115.1MB in the beginning and 127.1MB in the end (delta: -12.0MB). Peak memory consumption was 54.4MB. Max. memory is 16.1GB. * Witness Printer took 115.57ms. Allocated memory is still 209.7MB. Free memory was 127.1MB in the beginning and 122.2MB in the end (delta: 5.0MB). Peak memory consumption was 4.2MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: -1]: pointer dereference always succeeds For all program executions holds that pointer dereference always succeeds at this location - PositiveResult [Line: 515]: all allocated memory was freed For all program executions holds that all allocated memory was freed at this location - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 17 locations, 7 error locations. Started 1 CEGAR loops. OverallTime: 8.1s, OverallIterations: 8, TraceHistogramMax: 3, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 1.2s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 117 SdHoareTripleChecker+Valid, 0.4s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 117 mSDsluCounter, 90 SdHoareTripleChecker+Invalid, 0.3s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 40 mSDsCounter, 14 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 211 IncrementalHoareTripleChecker+Invalid, 225 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 14 mSolverCounterUnsat, 50 mSDtfsCounter, 211 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 98 GetRequests, 39 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 169 ImplicationChecksByTransitivity, 2.2s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=17occurred in iteration=0, InterpolantAutomatonStates: 37, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.0s AutomataMinimizationTime, 8 MinimizatonAttempts, 4 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.0s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 3.5s InterpolantComputationTime, 72 NumberOfCodeBlocks, 72 NumberOfCodeBlocksAsserted, 12 NumberOfCheckSat, 82 ConstructedInterpolants, 10 QuantifiedInterpolants, 1147 SizeOfPredicates, 20 NumberOfNonLiveVariables, 161 ConjunctsInSsa, 50 ConjunctsInUnsatCore, 12 InterpolantComputations, 6 PerfectInterpolantSequences, 5/30 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 7 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2023-11-23 21:20:07,398 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f0ec7130-8232-4110-8bd5-25419659d274/bin/utaipan-verify-mE87zJ7Ire/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 Writing output log to file Ultimate.log Result: TRUE