./Ultimate.py --spec ../../sv-benchmarks/c/properties/valid-memsafety.prp --file ../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for memory safety (deref-memtrack) Using default analysis Version e7bb482b 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_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/config/TaipanMemDerefMemtrack.xml -i ../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp --witnessprinter.witness.filename witness.graphml --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 32bit --witnessprinter.graph.data.programhash cb3174b12ccafcfa2421015218ce7e009c2319e912e783d4246aed1266b2586b --- Real Ultimate output --- This is Ultimate 0.2.3-dev-e7bb482 [2023-11-06 21:00:26,732 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-06 21:00:26,832 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/config/svcomp-DerefFreeMemtrack-32bit-Taipan_Default.epf [2023-11-06 21:00:26,839 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-06 21:00:26,840 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-06 21:00:26,869 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-06 21:00:26,870 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-06 21:00:26,871 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-06 21:00:26,871 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-06 21:00:26,872 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-06 21:00:26,873 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-06 21:00:26,873 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-06 21:00:26,874 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-06 21:00:26,875 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-06 21:00:26,875 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-06 21:00:26,876 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-06 21:00:26,876 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-06 21:00:26,877 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-06 21:00:26,877 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-06 21:00:26,878 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-06 21:00:26,879 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-06 21:00:26,879 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-06 21:00:26,880 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2023-11-06 21:00:26,881 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2023-11-06 21:00:26,881 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-06 21:00:26,882 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-06 21:00:26,883 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-06 21:00:26,883 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-06 21:00:26,884 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-06 21:00:26,884 INFO L153 SettingsManager]: * Check for the main procedure if all allocated memory was freed=true [2023-11-06 21:00:26,885 INFO L153 SettingsManager]: * Bitprecise bitfields=true [2023-11-06 21:00:26,885 INFO L153 SettingsManager]: * SV-COMP memtrack compatibility mode=true [2023-11-06 21:00:26,886 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-06 21:00:26,887 INFO L153 SettingsManager]: * Adapt memory model on pointer casts if necessary=true [2023-11-06 21:00:26,887 INFO L153 SettingsManager]: * Check unreachability of reach_error function=false [2023-11-06 21:00:26,888 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-06 21:00:26,889 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-06 21:00:26,889 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-06 21:00:26,890 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-06 21:00:26,890 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:00:26,890 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-06 21:00:26,891 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-06 21:00:26,891 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-06 21:00:26,891 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-06 21:00:26,892 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-06 21:00:26,892 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-06 21:00:26,892 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_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G valid-free) ) CHECK( init(main()), LTL(G valid-deref) ) CHECK( init(main()), LTL(G valid-memtrack) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cb3174b12ccafcfa2421015218ce7e009c2319e912e783d4246aed1266b2586b [2023-11-06 21:00:27,256 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-06 21:00:27,288 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-06 21:00:27,291 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-06 21:00:27,293 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-06 21:00:27,294 INFO L274 PluginConnector]: CDTParser initialized [2023-11-06 21:00:27,295 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/../../sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2023-11-06 21:00:30,442 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-06 21:00:30,671 INFO L384 CDTParser]: Found 1 translation units. [2023-11-06 21:00:30,672 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/sv-benchmarks/c/memsafety-ext3/freeAlloca.c [2023-11-06 21:00:30,680 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/data/1c5ebb2af/a30cdbdd2daa412889df1b1b9e6bff8e/FLAGb7922ec08 [2023-11-06 21:00:30,697 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/data/1c5ebb2af/a30cdbdd2daa412889df1b1b9e6bff8e [2023-11-06 21:00:30,700 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-06 21:00:30,702 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-06 21:00:30,704 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-06 21:00:30,704 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-06 21:00:30,710 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-06 21:00:30,711 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:00:30" (1/1) ... [2023-11-06 21:00:30,713 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e92dbac and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:30, skipping insertion in model container [2023-11-06 21:00:30,713 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 06.11 09:00:30" (1/1) ... [2023-11-06 21:00:30,734 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-06 21:00:30,916 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:00:30,925 INFO L202 MainTranslator]: Completed pre-run [2023-11-06 21:00:30,936 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-06 21:00:30,949 INFO L206 MainTranslator]: Completed translation [2023-11-06 21:00:30,950 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:30 WrapperNode [2023-11-06 21:00:30,950 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-06 21:00:30,951 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-06 21:00:30,951 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-06 21:00:30,951 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-06 21:00:30,958 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:30" (1/1) ... [2023-11-06 21:00:30,965 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:30" (1/1) ... [2023-11-06 21:00:30,996 INFO L138 Inliner]: procedures = 10, calls = 8, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 33 [2023-11-06 21:00:30,997 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-06 21:00:30,998 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-06 21:00:30,998 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-06 21:00:30,998 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-06 21:00:31,007 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:30" (1/1) ... [2023-11-06 21:00:31,008 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:30" (1/1) ... [2023-11-06 21:00:31,009 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:30" (1/1) ... [2023-11-06 21:00:31,009 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:30" (1/1) ... [2023-11-06 21:00:31,014 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:30" (1/1) ... [2023-11-06 21:00:31,017 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:30" (1/1) ... [2023-11-06 21:00:31,018 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:30" (1/1) ... [2023-11-06 21:00:31,019 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:30" (1/1) ... [2023-11-06 21:00:31,021 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-06 21:00:31,022 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-06 21:00:31,022 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-06 21:00:31,022 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-06 21:00:31,023 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:30" (1/1) ... [2023-11-06 21:00:31,030 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-06 21:00:31,044 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:00:31,056 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-06 21:00:31,079 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-06 21:00:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2023-11-06 21:00:31,091 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-06 21:00:31,092 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-06 21:00:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2023-11-06 21:00:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2023-11-06 21:00:31,092 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2023-11-06 21:00:31,167 INFO L236 CfgBuilder]: Building ICFG [2023-11-06 21:00:31,169 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-06 21:00:31,382 INFO L277 CfgBuilder]: Performing block encoding [2023-11-06 21:00:31,408 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-06 21:00:31,409 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-06 21:00:31,412 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:00:31 BoogieIcfgContainer [2023-11-06 21:00:31,412 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-06 21:00:31,415 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-06 21:00:31,415 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-06 21:00:31,419 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-06 21:00:31,419 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 06.11 09:00:30" (1/3) ... [2023-11-06 21:00:31,420 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b550b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:00:31, skipping insertion in model container [2023-11-06 21:00:31,421 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 06.11 09:00:30" (2/3) ... [2023-11-06 21:00:31,421 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2b550b8c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 06.11 09:00:31, skipping insertion in model container [2023-11-06 21:00:31,422 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:00:31" (3/3) ... [2023-11-06 21:00:31,423 INFO L112 eAbstractionObserver]: Analyzing ICFG freeAlloca.c [2023-11-06 21:00:31,445 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-06 21:00:31,446 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 8 error locations. [2023-11-06 21:00:31,495 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-06 21:00:31,503 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;@15ca99dd, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-06 21:00:31,503 INFO L358 AbstractCegarLoop]: Starting to check reachability of 8 error locations. [2023-11-06 21:00:31,508 INFO L276 IsEmpty]: Start isEmpty. Operand has 19 states, 10 states have (on average 2.0) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:31,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 21:00:31,515 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:31,516 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 21:00:31,516 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 21:00:31,522 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:31,523 INFO L85 PathProgramCache]: Analyzing trace with hash 71436, now seen corresponding path program 1 times [2023-11-06 21:00:31,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:31,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1267497787] [2023-11-06 21:00:31,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:31,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:31,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:31,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:31,812 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:31,813 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1267497787] [2023-11-06 21:00:31,815 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1267497787] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:00:31,815 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:00:31,815 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:00:31,817 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280544149] [2023-11-06 21:00:31,819 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:00:31,823 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:00:31,823 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:31,873 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:00:31,874 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:00:31,877 INFO L87 Difference]: Start difference. First operand has 19 states, 10 states have (on average 2.0) internal successors, (20), 18 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) 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) [2023-11-06 21:00:31,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:31,960 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2023-11-06 21:00:31,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:00:31,963 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 [2023-11-06 21:00:31,963 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:31,970 INFO L225 Difference]: With dead ends: 17 [2023-11-06 21:00:31,971 INFO L226 Difference]: Without dead ends: 16 [2023-11-06 21:00:31,973 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 [2023-11-06 21:00:31,978 INFO L413 NwaCegarLoop]: 6 mSDtfsCounter, 11 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 11 SdHoareTripleChecker+Valid, 6 SdHoareTripleChecker+Invalid, 17 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:31,979 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [11 Valid, 6 Invalid, 17 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:00:31,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 16 states. [2023-11-06 21:00:32,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 16 to 15. [2023-11-06 21:00:32,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 15 states, 10 states have (on average 1.6) internal successors, (16), 14 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) [2023-11-06 21:00:32,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 16 transitions. [2023-11-06 21:00:32,006 INFO L78 Accepts]: Start accepts. Automaton has 15 states and 16 transitions. Word has length 3 [2023-11-06 21:00:32,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:32,006 INFO L495 AbstractCegarLoop]: Abstraction has 15 states and 16 transitions. [2023-11-06 21:00:32,006 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) [2023-11-06 21:00:32,007 INFO L276 IsEmpty]: Start isEmpty. Operand 15 states and 16 transitions. [2023-11-06 21:00:32,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 4 [2023-11-06 21:00:32,007 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:32,007 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1] [2023-11-06 21:00:32,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-06 21:00:32,008 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 21:00:32,009 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:32,009 INFO L85 PathProgramCache]: Analyzing trace with hash 71437, now seen corresponding path program 1 times [2023-11-06 21:00:32,009 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:32,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1972204790] [2023-11-06 21:00:32,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:32,010 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:32,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:32,176 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:32,176 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:32,176 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1972204790] [2023-11-06 21:00:32,176 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1972204790] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:00:32,177 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:00:32,177 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2023-11-06 21:00:32,177 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285693188] [2023-11-06 21:00:32,177 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:00:32,178 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:00:32,178 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:32,179 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:00:32,179 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-06 21:00:32,180 INFO L87 Difference]: Start difference. First operand 15 states and 16 transitions. 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) [2023-11-06 21:00:32,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:32,227 INFO L93 Difference]: Finished difference Result 17 states and 18 transitions. [2023-11-06 21:00:32,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:00:32,228 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 [2023-11-06 21:00:32,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:32,229 INFO L225 Difference]: With dead ends: 17 [2023-11-06 21:00:32,229 INFO L226 Difference]: Without dead ends: 17 [2023-11-06 21:00:32,233 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 [2023-11-06 21:00:32,236 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 15 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 16 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 15 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:32,237 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 16 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 15 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:00:32,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 17 states. [2023-11-06 21:00:32,244 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 17 to 17. [2023-11-06 21:00:32,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 17 states, 12 states have (on average 1.5) internal successors, (18), 16 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:32,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 17 states to 17 states and 18 transitions. [2023-11-06 21:00:32,246 INFO L78 Accepts]: Start accepts. Automaton has 17 states and 18 transitions. Word has length 3 [2023-11-06 21:00:32,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:32,247 INFO L495 AbstractCegarLoop]: Abstraction has 17 states and 18 transitions. [2023-11-06 21:00:32,248 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) [2023-11-06 21:00:32,248 INFO L276 IsEmpty]: Start isEmpty. Operand 17 states and 18 transitions. [2023-11-06 21:00:32,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 6 [2023-11-06 21:00:32,249 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:32,249 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1] [2023-11-06 21:00:32,250 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-06 21:00:32,250 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 21:00:32,251 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:32,251 INFO L85 PathProgramCache]: Analyzing trace with hash 68679149, now seen corresponding path program 1 times [2023-11-06 21:00:32,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:32,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2002306865] [2023-11-06 21:00:32,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:32,254 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:32,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:32,457 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:32,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:32,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2002306865] [2023-11-06 21:00:32,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2002306865] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:00:32,458 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374575940] [2023-11-06 21:00:32,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:32,458 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:32,458 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:00:32,462 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:00:32,476 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-06 21:00:32,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:32,549 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-06 21:00:32,556 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:00:32,665 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:00:32,724 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:32,724 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:00:32,788 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:32,788 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1374575940] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:00:32,789 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [363287276] [2023-11-06 21:00:32,810 INFO L159 IcfgInterpreter]: Started Sifa with 4 locations of interest [2023-11-06 21:00:32,811 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:00:32,815 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:00:32,821 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:00:32,822 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:00:33,241 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:00:33,426 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '126#(and (<= (select |#length| |ULTIMATE.start_main_~p~0#1.base|) |ULTIMATE.start_main_~i~0#1|) (<= 1 |#StackHeapBarrier|) (<= 0 (+ 128 |ULTIMATE.start_main_#t~nondet3#1|)) (<= 2 |ULTIMATE.start_main_#t~malloc1#1.base|) (<= |ULTIMATE.start_main_#t~nondet3#1| 127) (<= 0 |ULTIMATE.start_main_~i~0#1|) (<= 2 |ULTIMATE.start_main_~p~0#1.base|) (<= |ULTIMATE.start_main_~i~0#1| 9) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc1#1.offset| 0))' at error location [2023-11-06 21:00:33,427 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:00:33,431 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:00:33,431 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [2, 2, 2] total 6 [2023-11-06 21:00:33,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1812683620] [2023-11-06 21:00:33,437 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:00:33,438 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-06 21:00:33,438 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:33,439 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-06 21:00:33,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=79, Unknown=0, NotChecked=0, Total=110 [2023-11-06 21:00:33,440 INFO L87 Difference]: Start difference. First operand 17 states and 18 transitions. Second operand has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2023-11-06 21:00:33,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:33,535 INFO L93 Difference]: Finished difference Result 23 states and 26 transitions. [2023-11-06 21:00:33,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-06 21:00:33,536 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 5 [2023-11-06 21:00:33,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:33,537 INFO L225 Difference]: With dead ends: 23 [2023-11-06 21:00:33,537 INFO L226 Difference]: Without dead ends: 23 [2023-11-06 21:00:33,539 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:00:33,543 INFO L413 NwaCegarLoop]: 12 mSDtfsCounter, 0 mSDsluCounter, 8 mSDsCounter, 0 mSdLazyCounter, 37 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 0 SdHoareTripleChecker+Valid, 20 SdHoareTripleChecker+Invalid, 39 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 37 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:33,544 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [0 Valid, 20 Invalid, 39 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 37 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:00:33,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-06 21:00:33,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-06 21:00:33,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 18 states have (on average 1.4444444444444444) internal successors, (26), 22 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:33,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 26 transitions. [2023-11-06 21:00:33,551 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 26 transitions. Word has length 5 [2023-11-06 21:00:33,552 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:33,552 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 26 transitions. [2023-11-06 21:00:33,552 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 7 states have (on average 2.142857142857143) internal successors, (15), 7 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) [2023-11-06 21:00:33,553 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 26 transitions. [2023-11-06 21:00:33,553 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 8 [2023-11-06 21:00:33,553 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:33,554 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 1, 1, 1] [2023-11-06 21:00:33,564 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2023-11-06 21:00:33,759 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:33,760 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 21:00:33,760 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:33,761 INFO L85 PathProgramCache]: Analyzing trace with hash 1576182067, now seen corresponding path program 1 times [2023-11-06 21:00:33,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:33,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461417551] [2023-11-06 21:00:33,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:33,762 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:33,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:33,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:33,880 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:33,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461417551] [2023-11-06 21:00:33,882 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [461417551] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:00:33,882 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139746690] [2023-11-06 21:00:33,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:33,884 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:33,885 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:00:33,886 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:00:33,908 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-06 21:00:33,943 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:33,944 INFO L262 TraceCheckSpWp]: Trace formula consists of 52 conjuncts, 4 conjunts are in the unsatisfiable core [2023-11-06 21:00:33,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:00:33,964 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:33,964 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:00:33,996 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:33,996 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2139746690] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:00:33,996 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1388399044] [2023-11-06 21:00:34,008 INFO L159 IcfgInterpreter]: Started Sifa with 5 locations of interest [2023-11-06 21:00:34,009 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:00:34,009 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:00:34,010 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:00:34,010 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:00:34,193 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:00:34,318 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '224#(and (<= (select |#length| |ULTIMATE.start_main_~p~0#1.base|) 2) (<= 1 |#StackHeapBarrier|) (<= 2 |ULTIMATE.start_main_#t~malloc1#1.base|) (<= 2 |ULTIMATE.start_main_~p~0#1.base|) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (= |ULTIMATE.start_main_#t~malloc1#1.offset| 0))' at error location [2023-11-06 21:00:34,318 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:00:34,318 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:00:34,318 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4, 4] total 8 [2023-11-06 21:00:34,318 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867177234] [2023-11-06 21:00:34,318 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:00:34,319 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2023-11-06 21:00:34,319 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:34,320 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2023-11-06 21:00:34,320 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:00:34,320 INFO L87 Difference]: Start difference. First operand 23 states and 26 transitions. Second operand has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 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) [2023-11-06 21:00:34,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:34,379 INFO L93 Difference]: Finished difference Result 27 states and 28 transitions. [2023-11-06 21:00:34,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2023-11-06 21:00:34,381 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 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) Word has length 7 [2023-11-06 21:00:34,381 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:34,382 INFO L225 Difference]: With dead ends: 27 [2023-11-06 21:00:34,382 INFO L226 Difference]: Without dead ends: 27 [2023-11-06 21:00:34,383 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 45 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2023-11-06 21:00:34,384 INFO L413 NwaCegarLoop]: 11 mSDtfsCounter, 4 mSDsluCounter, 55 mSDsCounter, 0 mSdLazyCounter, 27 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 66 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 27 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:34,384 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 66 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 27 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-06 21:00:34,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 27 states. [2023-11-06 21:00:34,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 27 to 26. [2023-11-06 21:00:34,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 26 states, 21 states have (on average 1.3333333333333333) internal successors, (28), 25 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:34,388 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 26 states to 26 states and 28 transitions. [2023-11-06 21:00:34,388 INFO L78 Accepts]: Start accepts. Automaton has 26 states and 28 transitions. Word has length 7 [2023-11-06 21:00:34,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:34,388 INFO L495 AbstractCegarLoop]: Abstraction has 26 states and 28 transitions. [2023-11-06 21:00:34,389 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 1.7777777777777777) internal successors, (16), 8 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) [2023-11-06 21:00:34,389 INFO L276 IsEmpty]: Start isEmpty. Operand 26 states and 28 transitions. [2023-11-06 21:00:34,389 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2023-11-06 21:00:34,389 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:34,390 INFO L195 NwaCegarLoop]: trace histogram [5, 4, 1, 1] [2023-11-06 21:00:34,404 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-06 21:00:34,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:34,591 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 21:00:34,591 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:34,591 INFO L85 PathProgramCache]: Analyzing trace with hash -1205124467, now seen corresponding path program 2 times [2023-11-06 21:00:34,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:34,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [30627579] [2023-11-06 21:00:34,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:34,592 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:34,611 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:34,870 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:34,871 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:34,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [30627579] [2023-11-06 21:00:34,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [30627579] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:00:34,872 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249809189] [2023-11-06 21:00:34,872 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:00:34,873 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:34,873 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:00:34,874 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:00:34,903 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-06 21:00:34,940 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2023-11-06 21:00:34,940 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:00:34,942 INFO L262 TraceCheckSpWp]: Trace formula consists of 41 conjuncts, 10 conjunts are in the unsatisfiable core [2023-11-06 21:00:34,945 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:00:34,958 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:00:35,061 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 8 proven. 0 refuted. 0 times theorem prover too weak. 12 trivial. 0 not checked. [2023-11-06 21:00:35,061 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:00:35,061 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [249809189] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:00:35,061 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:00:35,061 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [5] total 8 [2023-11-06 21:00:35,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096692035] [2023-11-06 21:00:35,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:00:35,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-06 21:00:35,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:35,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-06 21:00:35,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:00:35,063 INFO L87 Difference]: Start difference. First operand 26 states and 28 transitions. Second operand has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:35,097 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:35,098 INFO L93 Difference]: Finished difference Result 25 states and 26 transitions. [2023-11-06 21:00:35,098 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-06 21:00:35,098 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2023-11-06 21:00:35,099 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:35,099 INFO L225 Difference]: With dead ends: 25 [2023-11-06 21:00:35,099 INFO L226 Difference]: Without dead ends: 25 [2023-11-06 21:00:35,099 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=21, Invalid=69, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:00:35,100 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 12 mSDsluCounter, 4 mSDsCounter, 0 mSdLazyCounter, 24 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 12 SdHoareTripleChecker+Valid, 9 SdHoareTripleChecker+Invalid, 24 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 24 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:35,101 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [12 Valid, 9 Invalid, 24 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 24 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:00:35,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 25 states. [2023-11-06 21:00:35,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 25 to 25. [2023-11-06 21:00:35,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 25 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 24 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:35,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 25 states to 25 states and 26 transitions. [2023-11-06 21:00:35,105 INFO L78 Accepts]: Start accepts. Automaton has 25 states and 26 transitions. Word has length 11 [2023-11-06 21:00:35,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:35,105 INFO L495 AbstractCegarLoop]: Abstraction has 25 states and 26 transitions. [2023-11-06 21:00:35,105 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 4 states have (on average 1.5) internal successors, (6), 4 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:35,106 INFO L276 IsEmpty]: Start isEmpty. Operand 25 states and 26 transitions. [2023-11-06 21:00:35,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2023-11-06 21:00:35,106 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:35,106 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1] [2023-11-06 21:00:35,112 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2023-11-06 21:00:35,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,4 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:35,313 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 21:00:35,313 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:35,313 INFO L85 PathProgramCache]: Analyzing trace with hash 1444613299, now seen corresponding path program 2 times [2023-11-06 21:00:35,313 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:35,313 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397138580] [2023-11-06 21:00:35,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:35,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:35,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:35,510 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:35,511 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:35,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397138580] [2023-11-06 21:00:35,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397138580] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:00:35,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1425783160] [2023-11-06 21:00:35,512 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2023-11-06 21:00:35,512 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:35,512 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:00:35,516 INFO L229 MonitoredProcess]: Starting monitored process 5 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:00:35,528 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2023-11-06 21:00:35,580 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 1 check-sat command(s) [2023-11-06 21:00:35,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2023-11-06 21:00:35,581 INFO L262 TraceCheckSpWp]: Trace formula consists of 26 conjuncts, 9 conjunts are in the unsatisfiable core [2023-11-06 21:00:35,583 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:00:35,596 INFO L351 Elim1Store]: Elim1 eliminated variable of array dimension 1, 1 stores, 0 select indices, 0 select index equivalence classes, 0 disjoint index pairs (out of 0 index pairs), introduced 0 new quantified variables, introduced 0 case distinctions, treesize of input 8 treesize of output 1 [2023-11-06 21:00:35,662 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 36 trivial. 0 not checked. [2023-11-06 21:00:35,662 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-06 21:00:35,662 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1425783160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:00:35,663 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-06 21:00:35,663 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [8] total 9 [2023-11-06 21:00:35,663 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601076067] [2023-11-06 21:00:35,663 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:00:35,664 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-06 21:00:35,664 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:35,664 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-06 21:00:35,664 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:00:35,665 INFO L87 Difference]: Start difference. First operand 25 states and 26 transitions. Second operand has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2023-11-06 21:00:35,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:35,680 INFO L93 Difference]: Finished difference Result 23 states and 24 transitions. [2023-11-06 21:00:35,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-06 21:00:35,681 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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 15 [2023-11-06 21:00:35,681 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:35,682 INFO L225 Difference]: With dead ends: 23 [2023-11-06 21:00:35,682 INFO L226 Difference]: Without dead ends: 23 [2023-11-06 21:00:35,683 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 6 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=52, Unknown=0, NotChecked=0, Total=90 [2023-11-06 21:00:35,685 INFO L413 NwaCegarLoop]: 5 mSDtfsCounter, 9 mSDsluCounter, 0 mSDsCounter, 0 mSdLazyCounter, 8 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 9 SdHoareTripleChecker+Valid, 5 SdHoareTripleChecker+Invalid, 9 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 8 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:35,685 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [9 Valid, 5 Invalid, 9 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 8 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:00:35,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 23 states. [2023-11-06 21:00:35,695 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 23 to 23. [2023-11-06 21:00:35,695 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 23 states, 21 states have (on average 1.1428571428571428) internal successors, (24), 22 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:35,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 23 states to 23 states and 24 transitions. [2023-11-06 21:00:35,702 INFO L78 Accepts]: Start accepts. Automaton has 23 states and 24 transitions. Word has length 15 [2023-11-06 21:00:35,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:35,702 INFO L495 AbstractCegarLoop]: Abstraction has 23 states and 24 transitions. [2023-11-06 21:00:35,702 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 2 states have (on average 2.5) internal successors, (5), 2 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) [2023-11-06 21:00:35,703 INFO L276 IsEmpty]: Start isEmpty. Operand 23 states and 24 transitions. [2023-11-06 21:00:35,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2023-11-06 21:00:35,704 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:35,704 INFO L195 NwaCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1] [2023-11-06 21:00:35,714 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2023-11-06 21:00:35,909 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,5 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:35,910 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 21:00:35,910 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:35,910 INFO L85 PathProgramCache]: Analyzing trace with hash 902458835, now seen corresponding path program 1 times [2023-11-06 21:00:35,911 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:35,911 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [743167991] [2023-11-06 21:00:35,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:35,911 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:35,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:36,049 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:36,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [743167991] [2023-11-06 21:00:36,049 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [743167991] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-06 21:00:36,049 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582038319] [2023-11-06 21:00:36,049 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:36,050 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-06 21:00:36,050 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 [2023-11-06 21:00:36,051 INFO L229 MonitoredProcess]: Starting monitored process 6 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-06 21:00:36,078 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2023-11-06 21:00:36,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:36,132 INFO L262 TraceCheckSpWp]: Trace formula consists of 116 conjuncts, 8 conjunts are in the unsatisfiable core [2023-11-06 21:00:36,133 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-06 21:00:36,162 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:36,163 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-06 21:00:36,246 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-06 21:00:36,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1582038319] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-06 21:00:36,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1105083356] [2023-11-06 21:00:36,249 INFO L159 IcfgInterpreter]: Started Sifa with 8 locations of interest [2023-11-06 21:00:36,249 INFO L166 IcfgInterpreter]: Building call graph [2023-11-06 21:00:36,250 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-06 21:00:36,250 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-06 21:00:36,250 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-06 21:00:36,406 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-06 21:00:36,673 INFO L133 SifaRunner]: Sifa could not show that error location is unreachable, found '584#(and (<= 1 |#StackHeapBarrier|) (<= 3 (select |#length| |ULTIMATE.start_main_~p~0#1.base|)) (not (= |ULTIMATE.start_main_old_#valid#1| |#valid|)) (<= 2 |ULTIMATE.start_main_~p~0#1.base|) (= |ULTIMATE.start_main_~p~0#1.offset| 0) (not (= 97 (select (select |#memory_int| |ULTIMATE.start_main_~p~0#1.base|) 2))) (= |ULTIMATE.start_main_#res#1| 0) (exists ((|v_ULTIMATE.start_main_#t~malloc1#1.base_10| Int) (|v_#valid_27| (Array Int Int))) (and (= (select |v_#valid_27| |ULTIMATE.start_main_~p~0#1.base|) 1) (<= 2 |v_ULTIMATE.start_main_#t~malloc1#1.base_10|) (= (store |v_#valid_27| |v_ULTIMATE.start_main_#t~malloc1#1.base_10| 0) |#valid|))))' at error location [2023-11-06 21:00:36,673 WARN L311 FreeRefinementEngine]: Interpolation failed due to KNOWN_IGNORE: ALGORITHM_FAILED [2023-11-06 21:00:36,673 INFO L185 FreeRefinementEngine]: Found 0 perfect and 3 imperfect interpolant sequences. [2023-11-06 21:00:36,673 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8, 8] total 12 [2023-11-06 21:00:36,673 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1014766588] [2023-11-06 21:00:36,673 INFO L85 oduleStraightlineAll]: Using 3 imperfect interpolants to construct interpolant automaton [2023-11-06 21:00:36,674 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2023-11-06 21:00:36,674 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:36,675 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2023-11-06 21:00:36,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-11-06 21:00:36,675 INFO L87 Difference]: Start difference. First operand 23 states and 24 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:36,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:36,727 INFO L93 Difference]: Finished difference Result 31 states and 32 transitions. [2023-11-06 21:00:36,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2023-11-06 21:00:36,727 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2023-11-06 21:00:36,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:36,728 INFO L225 Difference]: With dead ends: 31 [2023-11-06 21:00:36,728 INFO L226 Difference]: Without dead ends: 31 [2023-11-06 21:00:36,729 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 38 SyntacticMatches, 4 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 142 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=99, Invalid=281, Unknown=0, NotChecked=0, Total=380 [2023-11-06 21:00:36,729 INFO L413 NwaCegarLoop]: 9 mSDtfsCounter, 1 mSDsluCounter, 27 mSDsCounter, 0 mSdLazyCounter, 28 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 1 SdHoareTripleChecker+Valid, 36 SdHoareTripleChecker+Invalid, 29 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 28 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:36,730 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [1 Valid, 36 Invalid, 29 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 28 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:00:36,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-06 21:00:36,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-06 21:00:36,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.103448275862069) internal successors, (32), 30 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:36,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 32 transitions. [2023-11-06 21:00:36,733 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 32 transitions. Word has length 18 [2023-11-06 21:00:36,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:36,734 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 32 transitions. [2023-11-06 21:00:36,734 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 12 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:36,734 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 32 transitions. [2023-11-06 21:00:36,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-06 21:00:36,735 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:36,735 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2023-11-06 21:00:36,746 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2023-11-06 21:00:36,941 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2023-11-06 21:00:36,941 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 21:00:36,942 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:36,942 INFO L85 PathProgramCache]: Analyzing trace with hash 764662355, now seen corresponding path program 2 times [2023-11-06 21:00:36,942 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:36,942 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [28271421] [2023-11-06 21:00:36,942 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:36,943 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:36,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-06 21:00:37,091 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 100 trivial. 0 not checked. [2023-11-06 21:00:37,091 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-06 21:00:37,092 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [28271421] [2023-11-06 21:00:37,092 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [28271421] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-06 21:00:37,092 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-06 21:00:37,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2023-11-06 21:00:37,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [107263761] [2023-11-06 21:00:37,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-06 21:00:37,093 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-06 21:00:37,093 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-06 21:00:37,093 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-06 21:00:37,093 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:00:37,094 INFO L87 Difference]: Start difference. First operand 31 states and 32 transitions. Second operand has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:37,110 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-06 21:00:37,110 INFO L93 Difference]: Finished difference Result 33 states and 33 transitions. [2023-11-06 21:00:37,111 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-06 21:00:37,111 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2023-11-06 21:00:37,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-06 21:00:37,112 INFO L225 Difference]: With dead ends: 33 [2023-11-06 21:00:37,112 INFO L226 Difference]: Without dead ends: 31 [2023-11-06 21:00:37,112 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 2 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-06 21:00:37,113 INFO L413 NwaCegarLoop]: 7 mSDtfsCounter, 4 mSDsluCounter, 6 mSDsCounter, 0 mSdLazyCounter, 16 mSolverCounterSat, 0 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 13 SdHoareTripleChecker+Invalid, 16 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Valid, 16 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-06 21:00:37,113 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 13 Invalid, 16 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [0 Valid, 16 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-06 21:00:37,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 31 states. [2023-11-06 21:00:37,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 31 to 31. [2023-11-06 21:00:37,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 31 states, 29 states have (on average 1.0689655172413792) internal successors, (31), 30 states have internal predecessors, (31), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:37,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 31 states to 31 states and 31 transitions. [2023-11-06 21:00:37,117 INFO L78 Accepts]: Start accepts. Automaton has 31 states and 31 transitions. Word has length 26 [2023-11-06 21:00:37,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-06 21:00:37,117 INFO L495 AbstractCegarLoop]: Abstraction has 31 states and 31 transitions. [2023-11-06 21:00:37,117 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 3 states have (on average 2.6666666666666665) internal successors, (8), 3 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-06 21:00:37,117 INFO L276 IsEmpty]: Start isEmpty. Operand 31 states and 31 transitions. [2023-11-06 21:00:37,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2023-11-06 21:00:37,118 INFO L187 NwaCegarLoop]: Found error trace [2023-11-06 21:00:37,118 INFO L195 NwaCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1] [2023-11-06 21:00:37,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-06 21:00:37,120 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE === [ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE, ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (and 5 more)] === [2023-11-06 21:00:37,120 INFO L145 PredicateUnifier]: Initialized classic predicate unifier [2023-11-06 21:00:37,121 INFO L85 PathProgramCache]: Analyzing trace with hash 764654410, now seen corresponding path program 1 times [2023-11-06 21:00:37,121 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-06 21:00:37,121 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923706818] [2023-11-06 21:00:37,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-06 21:00:37,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-06 21:00:37,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:00:37,169 INFO L356 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2023-11-06 21:00:37,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2023-11-06 21:00:37,225 INFO L130 FreeRefinementEngine]: Strategy SIFA_TAIPAN found a feasible trace [2023-11-06 21:00:37,226 INFO L360 BasicCegarLoop]: Counterexample is feasible [2023-11-06 21:00:37,227 INFO L805 garLoopResultBuilder]: Registering result UNSAFE for location ULTIMATE.startErr5ASSERT_VIOLATIONMEMORY_FREE (7 of 8 remaining) [2023-11-06 21:00:37,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr0REQUIRES_VIOLATIONMEMORY_DEREFERENCE (6 of 8 remaining) [2023-11-06 21:00:37,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr1REQUIRES_VIOLATIONMEMORY_DEREFERENCE (5 of 8 remaining) [2023-11-06 21:00:37,229 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr2REQUIRES_VIOLATIONMEMORY_DEREFERENCE (4 of 8 remaining) [2023-11-06 21:00:37,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr3REQUIRES_VIOLATIONMEMORY_DEREFERENCE (3 of 8 remaining) [2023-11-06 21:00:37,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr4ASSERT_VIOLATIONMEMORY_FREE (2 of 8 remaining) [2023-11-06 21:00:37,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr6ASSERT_VIOLATIONMEMORY_FREE (1 of 8 remaining) [2023-11-06 21:00:37,230 INFO L805 garLoopResultBuilder]: Registering result UNKNOWN for location ULTIMATE.startErr7ASSERT_VIOLATIONMEMORY_LEAK (0 of 8 remaining) [2023-11-06 21:00:37,230 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-06 21:00:37,234 INFO L445 BasicCegarLoop]: Path program histogram: [2, 2, 2, 1, 1, 1] [2023-11-06 21:00:37,238 INFO L178 ceAbstractionStarter]: Computing trace abstraction results [2023-11-06 21:00:37,272 WARN L1553 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-06 21:00:37,284 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 06.11 09:00:37 BoogieIcfgContainer [2023-11-06 21:00:37,285 INFO L131 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2023-11-06 21:00:37,285 INFO L112 PluginConnector]: ------------------------Witness Printer---------------------------- [2023-11-06 21:00:37,285 INFO L270 PluginConnector]: Initializing Witness Printer... [2023-11-06 21:00:37,286 INFO L274 PluginConnector]: Witness Printer initialized [2023-11-06 21:00:37,286 INFO L184 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 06.11 09:00:31" (3/4) ... [2023-11-06 21:00:37,287 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2023-11-06 21:00:37,297 WARN L1553 BoogieBacktranslator]: Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not [2023-11-06 21:00:37,330 INFO L149 WitnessManager]: Wrote witness to /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/witness.graphml.graphml [2023-11-06 21:00:37,330 INFO L131 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2023-11-06 21:00:37,331 INFO L158 Benchmark]: Toolchain (without parser) took 6628.61ms. Allocated memory was 138.4MB in the beginning and 251.7MB in the end (delta: 113.2MB). Free memory was 74.6MB in the beginning and 141.1MB in the end (delta: -66.5MB). Peak memory consumption was 48.7MB. Max. memory is 16.1GB. [2023-11-06 21:00:37,331 INFO L158 Benchmark]: CDTParser took 0.31ms. Allocated memory is still 138.4MB. Free memory is still 107.6MB. There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:00:37,331 INFO L158 Benchmark]: CACSL2BoogieTranslator took 246.11ms. Allocated memory was 138.4MB in the beginning and 209.7MB in the end (delta: 71.3MB). Free memory was 74.5MB in the beginning and 174.9MB in the end (delta: -100.4MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. [2023-11-06 21:00:37,332 INFO L158 Benchmark]: Boogie Procedure Inliner took 46.26ms. Allocated memory is still 209.7MB. Free memory was 174.8MB in the beginning and 179.2MB in the end (delta: -4.4MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. [2023-11-06 21:00:37,332 INFO L158 Benchmark]: Boogie Preprocessor took 23.62ms. Allocated memory is still 209.7MB. Free memory was 179.2MB in the beginning and 178.3MB in the end (delta: 965.6kB). There was no memory consumed. Max. memory is 16.1GB. [2023-11-06 21:00:37,332 INFO L158 Benchmark]: RCFGBuilder took 390.16ms. Allocated memory is still 209.7MB. Free memory was 178.3MB in the beginning and 166.7MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. [2023-11-06 21:00:37,333 INFO L158 Benchmark]: TraceAbstraction took 5870.02ms. Allocated memory was 209.7MB in the beginning and 251.7MB in the end (delta: 41.9MB). Free memory was 165.7MB in the beginning and 143.2MB in the end (delta: 22.5MB). Peak memory consumption was 64.2MB. Max. memory is 16.1GB. [2023-11-06 21:00:37,333 INFO L158 Benchmark]: Witness Printer took 44.76ms. Allocated memory is still 251.7MB. Free memory was 143.2MB in the beginning and 141.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. [2023-11-06 21:00:37,335 INFO L338 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.31ms. Allocated memory is still 138.4MB. Free memory is still 107.6MB. There was no memory consumed. Max. memory is 16.1GB. * CACSL2BoogieTranslator took 246.11ms. Allocated memory was 138.4MB in the beginning and 209.7MB in the end (delta: 71.3MB). Free memory was 74.5MB in the beginning and 174.9MB in the end (delta: -100.4MB). Peak memory consumption was 11.6MB. Max. memory is 16.1GB. * Boogie Procedure Inliner took 46.26ms. Allocated memory is still 209.7MB. Free memory was 174.8MB in the beginning and 179.2MB in the end (delta: -4.4MB). Peak memory consumption was 6.4MB. Max. memory is 16.1GB. * Boogie Preprocessor took 23.62ms. Allocated memory is still 209.7MB. Free memory was 179.2MB in the beginning and 178.3MB in the end (delta: 965.6kB). There was no memory consumed. Max. memory is 16.1GB. * RCFGBuilder took 390.16ms. Allocated memory is still 209.7MB. Free memory was 178.3MB in the beginning and 166.7MB in the end (delta: 11.6MB). Peak memory consumption was 12.6MB. Max. memory is 16.1GB. * TraceAbstraction took 5870.02ms. Allocated memory was 209.7MB in the beginning and 251.7MB in the end (delta: 41.9MB). Free memory was 165.7MB in the beginning and 143.2MB in the end (delta: 22.5MB). Peak memory consumption was 64.2MB. Max. memory is 16.1GB. * Witness Printer took 44.76ms. Allocated memory is still 251.7MB. Free memory was 143.2MB in the beginning and 141.1MB in the end (delta: 2.1MB). Peak memory consumption was 2.1MB. Max. memory is 16.1GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. - GenericResult: Unfinished Backtranslation Unfinished Backtranslation: Expected StepInfo for loop construct to contain Condition, but it did not - GenericResult: Unfinished Backtranslation The program execution was not completely translated back. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0s ErrorAutomatonConstructionTimeTotal, 0.0s FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0s ErrorAutomatonConstructionTimeAvg, 0.0s ErrorAutomatonDifferenceTimeAvg, 0.0s ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - CounterExampleResult [Line: 14]: free of unallocated memory possible free of unallocated memory possible We found a FailurePath: [L7] char *p = alloca(10 * sizeof(char)); [L9] int i = 0; VAL [alloca(10 * sizeof(char))={11:0}, i=0, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=1, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=2, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=3, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=4, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=5, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=6, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=7, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=8, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=9, p={11:0}] [L9] COND TRUE i < 10 [L10] p[i] = __VERIFIER_nondet_char() [L9] i++ VAL [alloca(10 * sizeof(char))={11:0}, i=10, p={11:0}] [L9] COND FALSE !(i < 10) [L13] EXPR p[2] VAL [alloca(10 * sizeof(char))={11:0}, p={11:0}, p[2]=97] [L13] COND TRUE p[2] == 'a' [L14] free(p) VAL [alloca(10 * sizeof(char))={11:0}, p={11:0}] [L14] free(p) VAL [alloca(10 * sizeof(char))={11:0}, p={11:0}] - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: -1]: Unable to prove that pointer dereference always succeeds Unable to prove that pointer dereference always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 14]: Unable to prove that free always succeeds Unable to prove that free always succeeds Reason: Not analyzed. - UnprovableResult [Line: 6]: Unable to prove that all allocated memory was freed Unable to prove that all allocated memory was freed Reason: Not analyzed. - StatisticsResult: Ultimate Automizer benchmark data CFG has 1 procedures, 19 locations, 8 error locations. Started 1 CEGAR loops. OverallTime: 5.8s, OverallIterations: 9, TraceHistogramMax: 10, PathProgramHistogramMax: 2, EmptinessCheckTime: 0.0s, AutomataDifference: 0.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 0.0s, HoareTripleCheckerStatistics: 0 mSolverCounterUnknown, 41 SdHoareTripleChecker+Valid, 0.3s IncrementalHoareTripleChecker+Time, 0 mSdLazyCounter, 41 mSDsluCounter, 171 SdHoareTripleChecker+Invalid, 0.2s Time, 0 mProtectedAction, 0 SdHoareTripleChecker+Unchecked, 0 IncrementalHoareTripleChecker+Unchecked, 104 mSDsCounter, 9 IncrementalHoareTripleChecker+Valid, 0 mProtectedPredicate, 170 IncrementalHoareTripleChecker+Invalid, 179 SdHoareTripleChecker+Unknown, 0 mSolverCounterNotChecked, 9 mSolverCounterUnsat, 67 mSDtfsCounter, 170 mSolverCounterSat, 0.0s SdHoareTripleChecker+Time, 0 IncrementalHoareTripleChecker+Unknown, PredicateUnifierStatistics: 0 DeclaredPredicates, 141 GetRequests, 77 SyntacticMatches, 4 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=31occurred in iteration=7, InterpolantAutomatonStates: 44, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.1s AutomataMinimizationTime, 8 MinimizatonAttempts, 2 StatesRemovedByMinimization, 2 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.1s SsaConstructionTime, 0.2s SatisfiabilityAnalysisTime, 1.9s InterpolantComputationTime, 170 NumberOfCodeBlocks, 152 NumberOfCodeBlocksAsserted, 15 NumberOfCheckSat, 158 ConstructedInterpolants, 0 QuantifiedInterpolants, 891 SizeOfPredicates, 6 NumberOfNonLiveVariables, 276 ConjunctsInSsa, 44 ConjunctsInUnsatCore, 16 InterpolantComputations, 5 PerfectInterpolantSequences, 156/338 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! [2023-11-06 21:00:37,352 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_8fdda6e5-0558-4563-a918-40157d52642d/bin/utaipan-verify-FOvIYxoinp/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 Writing human readable error path to file UltimateCounterExample.errorpath Result: FALSE(valid-free)